@article{2-s2.0-85183762030,

title = {Heflikite, ideally Ca2(Al2Sc)(Si2O7)(SiO4)O(OH), the first scandium epidote-supergroup mineral from Jordanów Śląski, Lower Silesia (Poland) and from Heftetjern, Tørdal (Norway)},

author = { A. Pieczka and R. Kristiansen and M. Stachowicz and M. Dumańska-Słowik and B. Gołębiowska and M.P. Sek and K. Nejbert and J. Kotowski and B. Marciniak-Maliszewska and A. Szuszkiewicz and E. Szełęg and K.W. Woźniak},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85183762030&doi=10.1180%2fmgm.2023.98&partnerID=40&md5=afe46eaff642067c9d8c968de139faaf},

doi = {10.1180/mgm.2023.98},

issn = {0026461X},

year  = {2024},

date = {2024-01-01},

journal = {Mineralogical Magazine},

publisher = {Cambridge University Press},

abstract = {Heflikite, the first Sc-dominant epidote-supergroup mineral, was discovered in two occurrences. The holotype was found in a granitic pegmatite associated with rodingite-like calc-silicate rocks and metasomatised granitic bodies exposed in a serpentinite quarry at Jordanów Slaski near Sobótka, Lower Silesia, SW Poland. The cotype comes from the Heftetjern pegmatite, Tørdal region, Norway. The holotype is composed of (in wt.%): 35.69 SiO2, 0.22 TiO2, 21.98 Al2O3, 6.12 Sc2O3, 0.07 V2O3, 1.10 Fe2O3, 0.11 Y2O3, 1.55 La2O3, 4.05 Ce2O3, 0.31 Pr2O3, 1.53 Nd2O3, 0.40 Sm2O3, 0.11 EuO, 0.56 Gd2O3, 0.14 MnO, 3.56 FeO, 0.16 MgO, 19.16 CaO, and 1.78 H2O(+)calc.; total 98.60. The cotype contains: 34.92 SiO2, 0.44 TiO2, 0.82 SnO2, 19.13 Al2O3, 4.79 Sc2O3, 1.96 Fe2O3, 2.55 La2O3, 7.39 Ce2O3, 0.48 Pr2O3, 0.67 Nd2O3, 0.12 Eu2O3, 0.61 Gd2O3, 0.13 MnO, 5.97 FeO, 17.66 CaO, and 1.73 H2O(+)calc.; total 99.37. The compositions correspond to the following empirical formulae: (Ca1.729Ce0.125La0.048Nd0.046Gd0.016Sm0.012Pr0.010Y0.005Eu2+0.003)S1.994 [(Al2.182Sc0.449Fe3+0.070V3+0.005)S2.706 (Fe2+0.251Mg0.020Mn0.010)S0.281 Ti0.014]S3.001 (Si3.006O11)O(OH) and (Ca1.644Ce0.235La0.082Nd0.021Gd0.018Pr0.015Eu2+0.004)S1.019 [(Al1.958Sc0.362Fe3+0.128)S2.448 (Fe2+0.434Mn0.009)S0.443 (Ti0.029Sn0.029)S 0.058]S2.949 (Si3.033O11)O(OH), respectively, and to the ideal formula Ca2(Al2Sc)(Si2O7)(SiO4)O(OH). The crystal structure of the holotype was refined in the monoclinic system with an R1 index of 8.62 %. The crystal-structure refinement indicates exclusively Si occupied T sites, Al occupied M1 and M2 sites, and Ca occupied A1 site. The M3 site is predominantly filled by trivalent cations, mainly Sc3+, with divalent cations (mainly Fe2+) as minor occupants. The A2 site is filled mostly by Ca with minor amounts of REE. The holotype heflikite crystallised from metasomatic fluids that infiltrated acontact between the granitic pegmatite and the surrounding rodingite-type calc-silicate rocks and serpentinites. The fluids that introduced Sc into the pegmatite could have been either hydrothermal or related to low-grade regional metamorphism that postdated the formation of the pegmatite. The cotype heflikite formed during the late-stage hydrothermal crystallisation of the Sc-enriched granitic pegmatite. © 2024 Cambridge University Press. All rights reserved.},

note = {1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85183776789,

title = {Scandio-winchite, ideally□(NaCa)(Mg4Sc)(Si8O22)(OH)2: The first Sc-dominant amphibole-supergroup mineral from Jordanów Śląski, Lower Silesia, southwestern Poland},

author = { A. Pieczka and M. Stachowicz and S. Zelek-Pogudz and B. Gołębiowska and M.P. Sek and K. Nejbert and J. Kotowski and B. Marciniak-Maliszewska and A. Szuszkiewicz and E. Szełęg and K. Stadnicka and K.W. Woźniak},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85183776789&doi=10.2138%2fam-2023-8974&partnerID=40&md5=0f4277a7e5eea2f59a7419927bb2b43e},

doi = {10.2138/am-2023-8974},

issn = {0003004X},

year  = {2024},

date = {2024-01-01},

journal = {American Mineralogist},

volume = {109},

number = {5},

pages = {940-948},

publisher = {Walter de Gruyter GmbH},

abstract = {Scandio-winchite, the first natural Sc-dominant amphibole-supergroup mineral, has been discovered in a granitic pegmatite that crops out in close association with rodingite-like calc-silicate rocks and metasomatized granitic bodies in a serpentinite quarry at a Jordanów Śląski village near Sobótka, ~30 km south of Wrocław, Lower Silesia, SW Poland. It occurs as an isolated subhedral crystal, with the size of ~20 × 8 μm in planar section, and as three polycrystalline aggregates, up to 50 μm across, composed of needle-shaped crystals dominated by {110}. It is present within chlorite aggregates that supposedly represent remnants of partly recrystallized xenoliths of the blackwall chlorite schists and is in quartz-feldspar portions of the pegmatite adjoining such xenolithic assemblages. Owing to the scarcity of the material and the exceptionally small size of the crystals, the color, streak, and optical properties could not be measured. By analogy with other amphiboles, scandio-winchite has a vitreous luster, brittle tenacity, and a Mohs hardness of ~5½. The mineral shows an uneven fracture and {110} perfect cleavage, with an angle of ~56° between cleavage planes. The density calculated from the empirical formula and refined unit-cell parameters is 3.026 g/cm3. The holotype crystal is composed of (in wt%): 55.88 SiO2, 0.11 TiO2, 0.53 Al2O3, 9.22 Sc2O3, 0.44 MnO, 8.89 FeO, 12.77 MgO, 5.71 CaO, 4.12 Na2O, 0.17 K2O, and 2.09 H2Ocalc(+); $begin{array}{} {rm H_2O^{(+)}_{calc}; } end{array}$ total 99.93. The composition normalized on the basis of 22 O2- + 2 (OH)- ions corresponds to the empirical formula A(□0.966K0.031Na0.003)ς1B(Na1.132Ca0.868)ς2 C(Mg2.704Fe1.0552+Mn0.053Sc1.140Al0.023Ti0.012)ς4.987T(Si7.935Al0.065)ς8.000O22(OH)2, $begin{array}{} displaystyle {rm {}^{C}(Mg_{2.704}Fe^{2+}_{1.055}Mn_{0.053}Sc_{1.140}Al_{0.023}Ti_{0.012})_{§igma4.987}{}^T(Si_{7.935}Al_{0.065})_{§igma8.000}O_{22}(OH)_2, } end{array}$ simplified formula (□;K)(Na;Ca)2[(Mg;Fe)4Sc](Si8O22)(OH)2, and the ideal formula □(NaCa)(Mg4Sc)(Si8O22)(OH)2. The crystal structure was refined in the monoclinic system, space-group symmetry C2/m, with R1 index of 6.57%. Its unit-cell parameters are: a = 9.864(2) Å},

note = {1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85205686436,

title = {Mimetite and polymineralic mimetite-pyromorphite-vanadinite single crystals from the Sowie Mts, Poland},

author = { E. Szełęg and J. Janeczek and R. Juroszek and M. Danila},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85205686436&doi=10.2478%2fmipo-2024-0005&partnerID=40&md5=8f85f612fcfd782bdca59247eca72cad},

doi = {10.2478/mipo-2024-0005},

issn = {18998291},

year  = {2024},

date = {2024-01-01},

journal = {Mineralogia},

volume = {55},

number = {1},

pages = {48-59},

publisher = {Sciendo},

abstract = {Millimeter-sized crystals of mimetite and pyromorphite, and polymineralic mimetite-pyromorphite-vanadinite crystals occur in quartz-baryte vein within paragneisses of the Sowie Mts, SW Poland. Three morphologically different mimetite crystals and a polymineralic crystal were examined by electron probe micro-analysis (EPMA), back-scattered electrons (BSE) imaging, Raman microspectroscopy, and X-ray composition mapping. Mimetite occurs as well-developed crystals, crystals built up of sub-parallel individuals due to autoepitaxial growth, and crystals extensively etched. All of the mimetite crystals are zoned with respect to pyromorphite molecule content with sharp increase up to 23 mol% in the outermost zones. The apparent vanadinite crystal actually consists of oscillatory-zoned pyromorphite + minor vanadinite core, intermediate zones composed of pyromorphite, two mimetite zones intercalated by a band of oscillatory pyromorphite and minor vanadinite, and vanadinite mantle. EPMA data show a limited miscibility between all three minerals in the polymineralic crystal. Most analyzes cluster around 10 mol% of ternary solid solution with the maximum value of ca. 30 mol%. X-ray elemental maps reveal sharp boundaries between compositionally contrasting zones in the crystal core. In mimetite zones, the substitution of As by P does not exceed 0.43 atoms per formula unit (apfu). In the vanadinite mantle, As + P does not exceed 0.30 apfu. The distribution of Pb is uniform throughout the crystal with the highest Ca/Pb ratio of 0.03. The observed sequence of crystallization in the polymineralic crystal can be explained by the relative changes in ions concentrations at the crystal/solution interface, i.e. within the diffusion boundary layer, in accord with the models of the autocatalytic crystal growth. The authors hypothesize that kinetically driven fast growth of the polymineralic crystals resulted in precipitation of discrete mineral phases with very limited anionic substitutions. © 2024 Eligiusz Szełȩg et al., published by Sciendo.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85182024353,

title = {Scandian actinolite from Jordanów Slaski, Lower Silesia, Poland: Compositional evolution, crystal structure, and genetic Implications},

author = { A. Pieczka and M. Stachowicz and S. Zelek-Pogudz and B. Gołębiowska and M.P. Sek and K. Nejbert and J. Kotowski and B. Marciniak-Maliszewska and A. Szuszkiewicz and E. Szełęg and K. Stadnicka and K.W. Woźniak},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85182024353&doi=10.2138%2fam-2022-8786&partnerID=40&md5=54f416a6584d71e46a4814f8732efd92},

doi = {10.2138/am-2022-8786},

issn = {0003004X},

year  = {2024},

date = {2024-01-01},

journal = {American Mineralogist},

volume = {109},

number = {1},

pages = {174-183},

publisher = {Walter de Gruyter GmbH},

abstract = {Scandian actinolite evolving to scandio-winchite (up to 5.45 wt% Sc2O3) has been found in chloritedominant xenoliths incorporated into marginal portion of a granitic pegmatite. The pegmatite intruded a blackwall schist zone developed around rodingite-type rocks exposed in a serpentinite quarry at Jordanów Slzski near Sobótka, ~30 km south of Wrocław, Lower Silesia, Poland. The amphiboles form irregular overgrowths around cascandite and represent a complex solid-solution series among actinolite and scandio-winchite end-members, with a trace contribution of "scandio-magnesio-hornblende."Structural studies of a scandian actinolite crystal with composition A[□0.995(2)K0.005(2)]ς1B[Na0.24(5)Ca1.73(4)]ς1.98(1)C[Mg3.74 (7) Fe 0.90(3)2+ Mn0.04 (1) Sc0.26(3) Al0.05 (1)] ς 4.99 (1) T[Si7.98 (2) Al 0.02(2)] ς 8.00 O22 (O H) 2 revealed monoclinic C2/m structure with unit-cell parameters a = 9.8517(3)},

note = {2},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85086649704,

title = {Crystal chemistry of an erythrite-köttigite solid solution (Co3–xznx) (aso4)2·8h2o},

author = { J. Ciesielczuk and M. Dulski and J. Janeczek and T. Krzykawski and J. Kusz and E. Szełęg},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85086649704&doi=10.3390%2fmin10060548&partnerID=40&md5=9390c4bc3f2543fcf7fafd4e546610fd},

doi = {10.3390/min10060548},

issn = {2075163X},

year  = {2020},

date = {2020-01-01},

journal = {Minerals},

volume = {10},

number = {6},

pages = {1-25},

publisher = {MDPI AG},

abstract = {A wide compositional range, covering about 90% of an expected erythrite-köttigite substitutional solid solution with extreme compositions of (Co2.84Mg0.14Zn0.02) (AsO4)2·8H2O and (Zn2.74Co0.27) (AsO4)2·8H2O, was revealed in a suite of samples from a polymetallic ore deposit in Miedzianka, SW Poland. Members of the solid solution series were examined by means of Electron Probe Microanalysis (EPMA), Scanning Electron Microscopy (SEM)/Energy-Dispersive Spectrometer (EDS), X-ray single-crystal and powder diffraction, and Raman spectroscopy. Metal cations were randomly distributed between two special octahedral sites in the erythrite–köttigite structure. In response to Co ↔ Zn substitutions, small but significant changes in bond distances (particularly in [AsO4] tetrahedra), rotation, and distortion of co-ordination polyhedra were observed. Two sub-series of dominant cationic substitutions (Co-Mg-Ni and Co-Fe-Zn) were noted within the arsenate series of vivianite-group minerals linked by erythrite. The paragenetic sequence erythrite → Zn-rich erythrite → Co-rich köttigite → köttigite reflects the evolution of the solution’s pH towards increased acidity and a relative increase in the concentration of Zn ions following precipitation of erythrite. © 2020 by the authors.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85079863442,

title = {Third worldwide occurrence of juangodoyite, Na2Cu(Co3)2, and other secondary Na, Cu, Mg, and Ca minerals in the fore-sudetic monocline (lower silesia, SW Poland)},

author = { Ł. Kruszewski and M. Świerk and R. Siuda and E. Szełęg and B. Marciniak-Maliszewska},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85079863442&doi=10.3390%2fmin10020190&partnerID=40&md5=2932a760d859b9059a55f124cc12f801},

doi = {10.3390/min10020190},

issn = {2075163X},

year  = {2020},

date = {2020-01-01},

journal = {Minerals},

volume = {10},

number = {2},

publisher = {MDPI AG},

abstract = {Na-Cu carbonates are relatively rare secondary minerals in weathering zones of ore deposits. Hereby we describe mineral composition and crystal chemistry of the most important secondary (Na)Cu minerals and their Na-and Mg-bearing associates forming rich paragenesis in Rudna IX mine. A non-bulky Ca-rich dripstone-like paragenesis from Lubin Główny mine is also characterized, using Powder X-Ray Diffraction, Rietveld, and Electron Microprobe methods. Light blue juangodoyite (3rd occurrence worldwide) and darker chalconatronite are the most important members of the Rudna IX paragenesis, being associated with malachite, aragonite (intergrown with hydromagnesite and northupite), and probably cornwallite. Most of the minerals are chemically close to their ideal composition, with minor Mg substitution in malachite. Cu chlorides are mainly represented by clinoatacamite and probably herbertsmithite. Additional, minor phases include trace Cu minerals langite, wroewolfeite, and a lavendulan-group mineral, and monohydrocalcite. Separate halite-rich encrustations are shown to be filled with eriochalcite, ktenasite, and kröhnkite. The most likely to be confirmed coexisting species include paratacamite, wooldridgeite/nesquehonite, johillerite, melanothallite, and kipushite. The Lubin paragenesis mainly comprises aragonite, gypsum, rapidcreekite, and monohydrocalcite, with trace vaterite. Blue colouration is mainly provided by a yet unspecified Ni-, Co-, Mg-, and Mn-bearing Cu-Zn-Ca arsenate mineral close to parnauite. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.},

note = {2},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85078022204,

title = {Pb-rich slags, minerals, and pollution resulted from a medieval ag-pb smelting and mining operation in the silesian-cracovian region (Southern Poland)},

author = { J. Cabała and R. Warchulski and D. Rozmus and D. Środek and E. Szełęg},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85078022204&doi=10.3390%2fmin10010028&partnerID=40&md5=e853fb643c36e962c86bf6971b152461},

doi = {10.3390/min10010028},

issn = {2075163X},

year  = {2020},

date = {2020-01-01},

journal = {Minerals},

volume = {10},

number = {1},

publisher = {MDPI AG},

abstract = {Since the 12th century in the Silesian-Cracovian area, lead, litharge, and silver have been produced by the pyrometallurgical processing of Pb-Ag-Zn ore. Slags and soils contaminated with heavy metals (Zn; Pb; Cd; Fe; Mn; As) were the subject of this research. Samples were collected during archaeological works in the area of early medieval metallurgical settlement. The main goals of the analyses (Scanning Electron Miscroscopy-Energy Dispersive Spectroscopy (SEM-EDS); Electron Probe Microanalyzer (EPMA); X-ray diffraction (XRD); Atomic Absorption Spectroscopy (AAS)) were the determination of the mineralogical composition of furnace batches and smelting temperatures and conditions. In soils, the anthropogenic phases enriched in Pb, Zn, Fe, Mn, P, and primary minerals like goethite, ferrihydrite, sphalerite, galena, smithsonite, minrecordite, cerussite, gypsum, anglesite, jarosite, and hemimorphite were identified. The soil from former metallurgical settlements contained up to 1106 mg·kg−1 Pb, 782 mg·kg−1 Zn, 4.7 mg·kg−1 Cd in the fine fraction. Much higher heavy metal concentrations were observed in the waste products of ore rinsing, up to 49,282 mg·kg−1 Pb, 64,408 mg·kg−1 Zn, and 287 mg·kg−1 Cd. The medieval smelting industry and Pb-Ag-Zn ore processing are marked by highly anomalous geochemical pollution (Pb; Zn; Cd; Fe; Mn; Ba) in the topsoil. The methods of mineralogical investigation, such as SEM-EDS or EMPA, can be used to identify mineralogical phases formed during metallurgical processes or ore processing. Based on these methods, the characteristic primary assemblage and synthetic phases were identified in the area polluted by medieval metallurgy and mining of Pb-Ag-Zn ores, including MVT (Mississippi Valley Type) deposits. The minerals distinguished in slags and the structural features of metal-bearing aggregates allow us to conclude that batches have included mostly oxidised minerals (PbCO3; ZnCO3; CaZn(CO3)2; FeOOH), sulfides (PbS and ZnS) and quartz (SiO2). The laboratory experiment of high-temperature heating of the examined slags showed that smelting temperatures used in the second half of 13th century were very high and could have reached up to 1550◦ C. The results indicate, that geochemical and mineralogical methods can be used to obtain important information from archaeological sites, even after archaeological work has long ceased. © 2019 by the authors. Licensee MDPI, Basel, Switzerland.},

note = {21},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85046798254,

title = {Study on the Properties of Waste Apatite Phosphogypsum as a Raw Material of Prospective Applications},

author = { K. Grabas and A. Pawełczyk and W. Stręk and E. Szełęg and S. Stręk},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85046798254&doi=10.1007%2fs12649-018-0316-8&partnerID=40&md5=87089bdf30018ab6a8afb0cf54ed9950},

doi = {10.1007/s12649-018-0316-8},

issn = {18772641},

year  = {2019},

date = {2019-01-01},

journal = {Waste and Biomass Valorization},

volume = {10},

number = {10},

pages = {3143-3155},

publisher = {Springer Netherlands},

abstract = {Abstract: This paper presents the results of the study on chemical and the physical properties of waste phosphogypsum (PG) of apatite origin from the former chemical plant Wizow, Poland which are important for further processing and economic use. The research was carried out to verify whether the waste might be useful as a raw material for rare earth elements (REE) recovery and the manufacture of building materials. The following methods were chosen: X-ray diffraction, scanning electron microscopy with an energy-dispersive X-ray detector, atomic absorption spectrometry, inductively coupled plasma spectrometry, differential thermal analysis, thermogravimetry, and gamma spectrometry with natural radioactive contamination analyzer. It has been proven that the chemical physical properties of phosphogypsum provide an opportunity to utilize this waste material as a source of REE and raw material for building purposes. PG contains an overall amount of REE in the interval of 0.343–0.637% by mass and does not show radioactivity level which would exclude it from construction purposes. The presented results serve as the basis for currently available technological directions in the management of apatite PG for useful trade products, which creates a chance for the elimination of its storage necessity by further processing. Graphical Abstract: [Figure not available: see fulltext.]. © 2018, The Author(s).},

note = {21},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85074939376,

title = {Calcium minerals and late-stage ca-metasomatism in the Julianna pegmatitic system, the Góry Sowie Block, SW Poland},

author = { A. Pieczka and A. Szuszkiewicz and E. Szełęg and K. Nejbert},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85074939376&doi=10.3749%2fcanmin.AB00019&partnerID=40&md5=3f3601f5037f934069773be72440146b},

doi = {10.3749/canmin.AB00019},

issn = {00084476},

year  = {2019},

date = {2019-01-01},

journal = {Canadian Mineralogist},

volume = {57},

number = {5},

pages = {775-777},

publisher = {Mineralogical Association of Canada},

abstract = {[No abstract available]},

note = {1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85074931326,

title = {First occurrence of Mn-dominant cordierite-group mineral: Electron microprobe and laser ablation ICP-MS study},

author = { A. Szuszkiewicz and A. Pieczka and P. Gadas and M. Vašinová-Galiová and E. Szełęg and B. Goł Ebiowska and D. Galusková},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85074931326&doi=10.3749%2fcanmin.AB00027&partnerID=40&md5=096af0b1f2ad84b98e5d4d61a49bf70b},

doi = {10.3749/canmin.AB00027},

issn = {00084476},

year  = {2019},

date = {2019-01-01},

journal = {Canadian Mineralogist},

volume = {57},

number = {5},

pages = {807-810},

publisher = {Mineralogical Association of Canada},

abstract = {[No abstract available]},

note = {1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85052641933,

title = {Chemical composition of Mn-and Cl-rich apatites from the szklary pegmatite, central sudetes, SW Poland: Taxonomic and genetic implications},

author = { A. Szuszkiewicz and A. Pieczka and B. Gołębiowska and M. Dumańska-Słowik and M. Marszałek and E. Szełęg},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85052641933&doi=10.3390%2fmin8080350&partnerID=40&md5=335306402ac43877c06ab616b308e6c4},

doi = {10.3390/min8080350},

issn = {2075163X},

year  = {2018},

date = {2018-01-01},

journal = {Minerals},

volume = {8},

number = {8},

publisher = {MDPI AG},

abstract = {Although calcium phosphates of the apatite group (apatites) with elevated contents of Mn are common accessory minerals in geochemically evolved granitic pegmatites, their Mn-dominant analogues are poorly studied. Pieczkaite,M1 Mn2 M2 Mn3 (PO4)3 X Cl, is an exceptionally rare Mn analogue of chlorapatite known so far from only two occurrences in the world, i.e., granitic pegmatites at Cross Lake, Manitoba, Canada and Szklary, Sudetes, SW Poland. In this study, we present the data on the compositional variation and microtextural relationships of various apatites highly enriched in Mn and Cl from Szklary, with the main focus on compositions approaching or attaining the stoichiometry of pieczkaite (pieczkaite-like apatites). The main goal of this study is to analyze their taxonomical position as well as discuss a possible mode of origin. The results show that pieczkaite-like apatites represent the Mn-rich sector of the solid solutionM1 (Mn;Ca)2 M2 (Mn;Ca)3 (PO4)3 X (Cl;OH). In the case of cation-disordered structure, all these compositions represent extremely Mn-rich hydroxylapatite or pieczkaite. However, for cation-ordered structure, there are also intermediate compositions for which the existence of two hypothetical end-member species can be postulated:M1 Ca2 M2 Mn3 (PO4)3 X Cl andM1 Mn2 M2 Ca3 (PO4)3 X OH. In contrast to hydroxylapatite and pieczkaite, that are members of the apatite-group, the two hypothetical species would classify into the hedyphane group within the apatite supergroup. The pieczkaite-like apatites are followed by highly Mn-enriched fluor-and hydroxylapatites in the crystallization sequence. Mn-poor chlorapatites, on the other hand, document local contamination by the serpentinite wall rocks. We propose that pieczkaite-like apatites in the Szklary pegmatite formed from small-volume droplets of P-rich melt that unmixed from the LCT-type (Li–Cs–Ta) pegmatite-forming melt with high degree of Mn-Fe fractionation. The LCT melt became locally enriched in Cl through in situ contamination by wall rock serpentinites. © 2018 by the authors. Licensee MDPI, Basel, Switzerland.},

note = {7},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85047884351,

title = {Towards zn-dominant tourmaline: A case of zn-rich fluor-elbaite and elbaite from the julianna system at Piława Górna, Lower Silesia, SW Poland},

author = { A. Pieczka and B. Gołębiowska and P. Jeleń and A. Włodek and E. Szełęg and A. Szuszkiewicz},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85047884351&doi=10.3390%2fmin8040126&partnerID=40&md5=7e0115f0e75fdd3913b2d33588a9c352},

doi = {10.3390/min8040126},

issn = {2075163X},

year  = {2018},

date = {2018-01-01},

journal = {Minerals},

volume = {8},

number = {4},

publisher = {MDPI AG},

abstract = {Tourmalines are a group of minerals which may concentrate various accessory components, e.g., Cu, Ni, Zn, Bi, Ti, and Sn. The paper presents fluor-elbaite and elbaite from a dyke of the Julianna pegmatitic system at Piława Górna, at the NE margin of the Bohemian Massif, SW Poland, containing up to 6.32 and 7.37 wt % ZnO, respectively. Such high amounts of ZnO are almost two times higher than in the second most Zn-enriched tourmaline known to date. The compositions of the Zn-rich tourmalines from Piława Górna, studied by electron micropropy and Raman spectroscopy, correspond to the formulae:X(Na0.733Ca0.013□0.254)YΣ1 (Al1.033Li0.792 Zn0.755Fe2+0.326Mn0.094)ZΣ3 Al6(TSi6O18)(BO3)V3 (OH)W3 (F0.654OH0.344), andX(Na0.779Ca0.015□0.206)Σ1Y(Al1.061Li0.869Zn0.880Fe2+0.098Mn0.094)ZΣ3 Al6(TSi6O18)(BO3)V3 (OH)W3 (OH0.837F0.163), respectively, with Zn as one of the main octahedral occupants. A comparison with other tourmalines and associated Zn-rich fluor-elbaite and elbaite from the pegmatite indicates that atypically high Zn-enrichment is not a result of Zn-Fe fractionation, but dissolution and reprecipitation induced by a late (Na;Li;B;F)-bearing fluid within the assemblage of gahnite spinel and primary schorl-type tourmaline. This strongly suggests Na-Li-B-F metasomatism of gahnite-bearing mineral assemblages as that is the only environment that can promote crystallization of a hypothetical Zn-dominant tourmaline. The compositions of the Zn-rich fluor-elbaite and elbaite suggest three possible end-members for such a hypothetical tourmaline species: NaZn3Al6(Si6O18)(BO3)3(OH)3(OH), □(Zn2Al)Al6(Si6O18)(BO3)3(OH)3(OH) and Na(Zn2Al)Al6(Si6O18)(BO3)3(OH)3O by analogy with other tourmalines with divalent Y occupants, such as schorl/foitite/oxy-schorl and dravite/magnesio-foitite/oxy-dravite. © 2018 by the authors. Licensee MDPI, Basel, Switzerland.},

note = {5},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85060823110,

title = {Oxy-dravite from Wołowa Góra Mountain, Karkonosze massif, SW Poland: Crystallochemical and structural studies},

author = { A. Pieczka and A. Ertl and M.P. Sek and D. Twardak and S. Zelek and E. Szełęg and G. Giester},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85060823110&doi=10.1180%2fminmag.2017.081.069&partnerID=40&md5=e374455863fd90d31f98cb817a836048},

doi = {10.1180/minmag.2017.081.069},

issn = {0026461X},

year  = {2018},

date = {2018-01-01},

journal = {Mineralogical Magazine},

volume = {82},

number = {4},

pages = {913-928},

publisher = {Cambridge University Press},

abstract = {Yellowish dravitic tourmaline (dominated by the oxy-dravite component) associated with secondary fluor-dravite/fluor-schorl and dravite/schorl tourmalines was found in a quartz vein cropping out in the eastern part of the Karkonosze Mountains range, SW Poland. The crystal structure of this tourmaline was refined to an R 1 value of 1.85% based on single-crystal data, and the chemical composition was determined by electron-microprobe analysis. The tourmaline, a representative of the alkali-tourmaline group, has the structural formula: (Na 0.75 Ca 0.12 □ 0.13 ) Σ1 (Mg 1.93 Al 0.95 Ti 0.06 Fe 2 0 þ :04 V 0.01 ) Σ3 (Al 5.38 Mg 0.62 ) Σ6 B 3 Si 6 O 27 (OH) 3 (O 0.46 OH 0.33 F 0.21 ) Σ 1, and is characterized by an extremely high Mg/(Mg + Fe) ratio of 0.97–0.99, the W O 2– content that reaches 0.59 apfu resulting in a local predominance of the oxy-dravitic component and Mg–Al disorder on the octahedral Yand Z sites of the order of 0.64 apfu. This disordering results in an increasing <Z–O> distance with 1.925 Å, and unit-cell parameters a = 15.916(1) Å and c = 7.180(1) Å. The tourmaline formed during Variscan prograde metamorphism under the influence of a released (H 2 O;B;F)-bearing fluid. The fluid mobilized the most soluble components of partly altered silicic volcaniclastic material of the Late Cambrian to Early Ordovician bimodal volcanism to become the protolith for adjacent quartzo-feldspathic schists and amphibolites, and propagated them into the surrounding granitic gneisses of the Kowary unit in the eastern metamorphic cover of the Karkonosze granite. Copyright © Mineralogical Society of Great Britain and Ireland 2018},

note = {1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85040718683,

title = {Pegmatyty Norwegii - 8. Miȩdzynarodowe Sympozjum (PEG2017) na temat pegmatytów granitowych Kristiansand, Norwegia, 13-15.06.2017},

author = { J. Janeczek and E. Szełęg and K. Szopa and A. Szuszkiewicz},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85040718683&partnerID=40&md5=75bc0e4d46a334c4e232d79b86d96e65},

issn = {00332151},

year  = {2017},

date = {2017-01-01},

journal = {Przeglad Geologiczny},

volume = {65},

number = {11},

pages = {1443-1445},

publisher = {Polish Geological Institute},

abstract = {[No abstract available]},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85021154697,

title = {Zabińskiite, ideally Ca(Al0.5Ta0.5)(SiO4)O, a new mineral of the titanite group from the Piława Górna pegmatite, the Góry Sowie Block, southwestern Poland},

author = { A. Pieczka and F.C. Hawthorne and C. Ma and G.R. Rossman and E. Szełęg and A. Szuszkiewicz and K. Turniak and K. Nejbert and S.S. Ilnicki and P. Buffat and B. Rutkowski},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85021154697&doi=10.1180%2fminmag.2016.080.110&partnerID=40&md5=3bb67482dbe1def6732bc8ba8d620993},

doi = {10.1180/minmag.2016.080.110},

issn = {0026461X},

year  = {2017},

date = {2017-01-01},

journal = {Mineralogical Magazine},

volume = {81},

number = {3},

pages = {591-610},

publisher = {Mineralogical Society},

abstract = {Zabińskiite, ideally Ca(Al0.5Ta0.5)(SiO4)O, was found in a Variscan granitic pegmatite at Piława Górna, Lower Silesia, SW Poland. The mineral occurs along with (Al;Ta;Nb)- and (Al;F)-bearing titanites, a pyrochlore-supergroup mineral and a K-mica in compositionally inhomogeneous aggregates, ~120 μm × 70 μm in size, in a fractured crystal of zircon intergrown with polycrase-(Y) and euxenite-(Y). Zabińskiite is transparent, brittle, brownish, with a white streak, vitreous lustre and a Mohs hardness of ~5. The calculated density for the refined crystal is equal to 3.897 g cm-3, but depends strongly on composition. The mineral is non-pleochroic, biaxial (-), with mean refractive indices ≥1.89. The (Al;Ta;Nb)-richest zabińskiite crystal, (Ca0.980Na0.015)Σ=0.995(Al0.340Fe3+0.029Ti0.298V0.001Zr0.001Sn0.005Ta0.251Nb0.081)Σ=1.005[(Si0.988Al0.012)O4.946F0.047(OH)0.007)Σ=5.000]; 60.7 mol.% Ca[Al0.5(Ta;Nb)0.5](SiO4)O; is close in composition to previously described synthetic material. Zabińskiite is triclinic (space group symmetry A1) and has unit-cell parameters a = 7.031(2) Å},

note = {5},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85014556185,

title = {Bohseite, ideally Ca4Be4Si9O24(OH)4, from the Piława GóRNA quarry, the Góry Sowie Block, SW Poland},

author = { E. Szełęg and B. Zuzens and F.C. Hawthorne and A. Pieczka and A. Szuszkiewicz and K. Turniak and K. Nejbert and S.S. Ilnicki and H. Friis and E. Makovicky and M.T. Weller and M.H. Lemée-Cailleau},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85014556185&doi=10.1180%2fminmag.2016.080.066&partnerID=40&md5=795cba3eff3c4d4df6166d7a14fb2386},

doi = {10.1180/minmag.2016.080.066},

issn = {0026461X},

year  = {2017},

date = {2017-01-01},

journal = {Mineralogical Magazine},

volume = {81},

number = {1},

pages = {35-46},

publisher = {Mineralogical Society},

abstract = {Bohseite is an orthorhombic calcium beryllium aluminosilicate with variable Al content and an endmember formula Ca4Be4Si9O24(OH)4, that was discovered in the Piława Górna quarry in the eastern part of the Góry Sowie Block, ∼50 km southwest of Wrocław, SW Poland. It occurs in a zoned anatectic pegmatite dyke in close association with microcline, Cs-rich beryl, phenakite, helvite, 'lepidolite', probably bertrandite and unidentified Be-containing mica as alteration products after a primary Be mineral, probably beryl. Bohseite forms fan-like or parallel aggregates (up to 0.7 cm) of white, platy crystals (up to 2 mmlong) with characteristic striations. It is white with a white streak, is translucent and has a vitreous lustre; it does not fluoresce under ultraviolet light. The cleavage is perfect on {001} and fair on {010}, and neither parting nor twinning was observed. Bohseite is brittle with a splintery fracture and Mohs hardness is 5-6. The calculated density is 2.719 g cm-3. The indices of refraction are α = 1.579, β = 1.580, γ = 1.597, all ± 0.002; 2Vobs = 24(3)°},

note = {7},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85019732062,

title = {The euxenite-group minerals and products of their alteration in the hybrid julianna granitic pegmatite, piława gò RNA, sudetes, southwestern Poland},

author = { A. Szuszkiewicz and A. Pieczka and E. Szełęg and K. Turniak and S.S. Ilnicki and K. Nejbert},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85019732062&doi=10.3749%2fcanmin.1600023&partnerID=40&md5=1ef40487ce0258b2cdbb6f72dd96fdb7},

doi = {10.3749/canmin.1600023},

issn = {00084476},

year  = {2016},

date = {2016-01-01},

journal = {Canadian Mineralogist},

volume = {54},

number = {4},

pages = {879-898},

publisher = {Mineralogical Association of Canada},

abstract = {Polycrase-(Y) and euxenite-(Y) represent the euxenite-group minerals (EGM) that formed as magmatic minerals in the sequence of (Y;REE;U;Th)-(Nb;Ta;Ti) oxides: columbite-(Fe) → Ti-bearing ixiolite 6 ferrowodginite → samarskite-group minerals [ishikawaite → samarskite-(Y)] → EGM in the moderately fractionated granitic pegmatites of the hybrid NYFLCT Julianna pegmatitic system at Piława G'orna, Sudetes, SW Poland. The EGM crystallized with increasing Ti activity and decreasing Ta/(Ta Nb) and Mn/(Mn Fe) from F-poor and LREE-depleted melt. The variation in their composition results mainly from substitution along the A(U;Th)BTiA(Y;REE)-1 B(Nb;Ta)-1 vector. Metasomatic alteration of the EGM resulted in the formation of a variety of secondary pyrochlore supergroup minerals (PSM). The chemical composition of the PSM depends on the access gained by the metasomatic fluid to the replacement front. Alteration at sites of restricted access of the fluid led first to the formation of atypical Ca-enriched EGM evolving to zerovalence- dominant betafite with Y REE as the second-rank A-site component, and finally to (Y;REE)-rich zero-valencedominant pyrochlore. These PSM closely reflect the compositions of the parental EGM as indicated by similar Ti/(Ti Ta Nb), Ta/(TaNb), and Mn/(MnFe) values. If the transport of ions to and from the replacement front was relatively easy, the compositions of the alteration products were less limited by the composition of the primary oxides and zero-valence-dominant pyrochlore with Ca or UTh as the second-rank A-site components formed. This type of alteration took place with decreasing Ti/(Ti Nb Ta), Y/(Y REE), and Mn/(Mn Fe) but highly variable Ta/(Ta Nb). The addition of Ca, Fe, Mg, Sn, and Pb to the pegmatitic system during metasomatic alteration of the EGM could have been achieved through: (1) reaction of the orthomagmatic fluid with the amphibolite wall rock, circulating in a convective cell around the pegmatites; (2) assimilation of the wall rock by the pegmatite-forming melt; or (3) autometasomatic processes. However, given the current state of knowledge about the geochemical evolution of the Julianna pegmatitic system, the first scenario seems most likely.},

note = {5},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85019701095,

title = {Magnesium-rich na,be,li-rich sekaninaite from miarolitic pegmatite at zimnik, strzegom-sobó tka massif, sudetes, Poland},

author = { P. Gadas and M. Novák and A. Szuszkiewicz and E. Szełęg and M. Vašinová-Galiová and J. Haifler},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85019701095&doi=10.3749%2fcanmin.1600024&partnerID=40&md5=e1dc9e203ff67cec349747576598c46a},

doi = {10.3749/canmin.1600024},

issn = {00084476},

year  = {2016},

date = {2016-01-01},

journal = {Canadian Mineralogist},

volume = {54},

number = {4},

pages = {971-987},

publisher = {Mineralogical Association of Canada},

abstract = {Two distinct types of sekaninaite were found in zoned, miarolitic NYF pegmatites at Zimnik, Strzegom-Sobotka granitic massif: (1) graphic intergrowths of sekaninaite I (Sek-I) with quartz, up to ~5 cm in size, from a graphic unit are completely replaced by a fine-grained mixture of muscovite, chlorite, minor K-feldspar, albite, calcite, and rare secondary beryl; (2) columnar to conic subhedral crystals and irregular grains, up to 6 cm in size, of grey-violet to brownish sekaninaite II (Sek-II) occur in a blocky unit. Sek-II is partly replaced by biotite, muscovite, chlorite, schorl, and minor to trace zinnwaldite, beryl, albite, fluorapatite, calcite, topaz, and several accessory Nb,Ta,Ti-oxides and sulfides, and late smectite. Rather heterogeneous Sek-II (Sek71-75MnCrd23-28Crd1-2) has high contents of Mn (up to 0.54 apfu; 5.76 wt.% MnO) and Na (0.28-0.35 apfu; 1.32- 1.63 wt.% Na2O). It is significantly enriched in Li (0.12-0.18 apfu; 0.27-0.40 wt.% Li2O) and Be (0.15-0.25 apfu; 0.55-0.94 wt.% BeO) via the substitutions Ch(Na+K+Rb) VILi = Ch□+ VIR2+ and Ch(NaKRb) + IVBe = Ch□+ IVAl. Sek-II has the highest content of Mn ever found in natural cordierite-group minerals, along with almost no Mg (~0.01 apfu) and also high concentrations of Li and Be. The composition of Sek-II suggests low-pressure conditions of crystallization at ~1-2 kbar.},

note = {8},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85012872162,

title = {Cs-bearing beryl evolving to pezzottaite from the julianna pegmatitic system, SW Poland},

author = { A. Pieczka and E. Szełęg and A. Szuszkiewicz and B. Gołębiowska and S. Zelek and S.S. Ilnicki and K. Nejbert and K. Turniak},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85012872162&doi=10.3749%2fcanmin.1500075&partnerID=40&md5=a957ab8cff9899f9107340eb15c59c97},

doi = {10.3749/canmin.1500075},

issn = {00084476},

year  = {2016},

date = {2016-01-01},

journal = {Canadian Mineralogist},

volume = {54},

number = {1},

pages = {115-124},

publisher = {Mineralogical Association of Canada},

abstract = {Beryl is a common accessory mineral in the hybrid NYF + LCT Julianna pegmatite system, exposed in a quarry at Piława Górna in Lower Silesia, SW Poland. In pods with the LCT-type mineralization it forms zoned, yellowish, white to pinkish, Cs-enriched crystals (up to 16.56 Cs2O wt.%) with compositions at the crystal rims evolving to pezzottaite, i.e., a Cs-dominant mineral of the beryl group, with the empirical formula: (Cs0.755Na0.059Ca0.024K0.008Rb0.006A0.148)R1 (Be1.993Li0.961Si0.046)R3(Al1.993Mn0.007)R2[Si6O18]. Textural evidence indicates that the Cs-bearing beryl crystallized from a residual melt with high contents of fluxes and pezzottaite from hydrothermal fluids with Cs concentrations increased significantly due to crystallization of cleavelandite that suppressed the activity of Na. The Julianna pegmatitic system at Piława Górna is the third confirmed occurrence of pezzottaite worldwide. The mineral, similarly to pezzottaite in the type occurrence in Madagascar, formed in a pegmatite with a hybrid NYF + LCT signature.},

note = {4},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84954357759,

title = {Pilawite-(Y), Ca2(Y,Yb)2[Al4(SiO4)4O2(OH)2], a new mineral from the Piława GóRNA granitic pegmatite, southwestern Poland: Mineralogical data, crystal structure and association},

author = { A. Pieczka and F.C. Hawthorne and M.A. Cooper and E. Szełęg and A. Szuszkiewicz and K. Turniak and K. Nejbert and S.S. Ilnicki},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84954357759&doi=10.1180%2fminmag.2015.079.5.09&partnerID=40&md5=36c455446d03c8731d78907b7013215a},

doi = {10.1180/minmag.2015.079.5.09},

issn = {0026461X},

year  = {2015},

date = {2015-01-01},

journal = {Mineralogical Magazine},

volume = {79},

number = {5},

pages = {1143-1157},

publisher = {Mineralogical Society},

abstract = {Pilawite-(Y), ideally Ca2(Y;Yb)2Al4(SiO4)4O2(OH)2, was discovered in a pegmatite near Piława Górna, Lower Silesia, Poland. The mineral occurs as white, translucent, brittle crystals up to 1.5 mm in size. It has a white streak, vitreous lustre and a hardness of 5 on Mohs scale. The calculated density is 4.007 g/cm3. Pilawite-(Y) is non-pleochroic, biaxial (+), with refractive indices α = 1.743(5), β = 1.754(5) and γ = 1.779(5), birefringence Δ = 0.03-0.04},

note = {8},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84918538640,

title = {Samarskite-group minerals and alteration products: An example from the Julianna pegmatitic system, Piława Górna, SW Poland},

author = { A. Pieczka and A. Szuszkiewicz and E. Szełęg and S.S. Ilnicki and K. Nejbert and K. Turniak},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84918538640&doi=10.3749%2fcanmin.52.2.303&partnerID=40&md5=6f2ab5a8502062e8762a410697b9dce4},

doi = {10.3749/canmin.52.2.303},

issn = {00084476},

year  = {2014},

date = {2014-01-01},

journal = {Canadian Mineralogist},

volume = {52},

number = {2},

pages = {303-319},

publisher = {Mineralogical Association of Canada},

abstract = {Ishikawaite and samarskite-(Y) are indicators of an NYF signature in the mildly to moderately fractionated parts of the hybrid NYF + LCT Julianna pegmatitic system at Piława Górna, the Góry Sowie Block, SW Poland. The minerals were metasomatically altered by a Ca-bearing and Ta-enriched highly fluxed residual silicate melt. The intensity of the metasomatism and the chemical composition of its products strongly depended on the efficiency of the transport of ions to and from the replacement front. Restricted access of the fluid promoted the formation of calciosamarskite and oxycalciopyrochlore. Where the fluid could migrate more easily, with decreasing pH and temperature the alteration products became deficient in A-site cations (mainly Ca2+ and Mn2+). Consequently, earlier-crystallized pyrochlores transformed to zero-valent-dominant pyrochlores and microlites enriched in U+Th, Y+REE, or Ca. Low-temperature hydrothermal fluids were responsible for the final enrichment in Pb and Bi.},

note = {12},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84884576043,

title = {The Julianna pegmatite vein system at the Piława Górna Mine, Góry Sowie Block, SW Poland - Preliminary data on geology and descriptive mineralogy},

author = { A. Szuszkiewicz and E. Szełęg and A. Pieczka and S.S. Ilnicki and K. Nejbert and K. Turniak and M. Banach and M. Łodziński and R. Rózniak and P. Michałowski},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84884576043&doi=10.7306%2fgq.1097&partnerID=40&md5=52ec180708b7453f436cba7c850b8594},

doi = {10.7306/gq.1097},

issn = {16417291},

year  = {2013},

date = {2013-01-01},

journal = {Geological Quarterly},

volume = {57},

number = {3},

pages = {467-484},

abstract = {The newly discovered Julianna pegmatitic system from the Piława Górna Quarry (the Góry Sowie Block; Sudetes Mts.; NE margin of the Bohemian Massif) is described in terms of geological setting, petrography and descriptive mineralogy. The system represents the largest pegmatitic occurrence in the Polish Sudetes and consists of a complex network of cogenetic rare-element granitic pegmatites that intruded into tectonized amphibolite as discordant dikes. The pegmatites range from barren and weakly zoned to texturally well-differentiated ones that are composed of a fine-grained border zone, coarse-grained wall zone, graphic and blocky feldspar intermediate zones and a quartz core. Unidirectional and skeletal solidification textures are well-developed. The Julianna pegmatites consist of rock-forming plagioclase (ŁAn39), microcline, quartz and biotite accompanied mostly by accessory to minor muscovite, tourmaline, garnet and beryl. They crystallized from anatectic melt of hybrid NYF (niobium-yttrium-fluorine) + LCT (lithium-cesium-tantalum) geochemical characteristics. Pegmatites with a low to moderate degree of fractionation, that dominate in the Julianna system, bear NYF-signature accessory minerals, such as allanite-(Ce), columbite-, euxenite- and samarskite-group minerals, fergusonite-(Y) and gadolinite-(Y). However rare dikes that attained a very high degree of fractionation contain typical minerals of LCT-signature including tourmalines of the elbaite-olenite-rossmanite series, lepidolite, lithiophilite, spodumene, Cs-rich beryl and pollucite.},

note = {24},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84880299977,

title = {(Fe,Mn)-(Ti,Sn)-(Nb,Ta) oxide assemblage in a little fractionated portion of a mixed (NYF + LCT) pegmatite from Piława Górna, the Sowie Mts. block, SW Poland},

author = { A. Pieczka and A. Szuszkiewicz and E. Szełęg and K. Nejbert and M. Łodziński and S.S. Ilnicki and K. Turniak and M. Banach and W. Hołub and P. Michałowski and R. Rózniak},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880299977&doi=10.3190%2fjgeosci.136&partnerID=40&md5=f9e5732cb9d9de8f5ea9b880a9c5f65a},

doi = {10.3190/jgeosci.136},

issn = {18026222},

year  = {2013},

date = {2013-01-01},

journal = {Journal of Geosciences (Czech Republic)},

volume = {58},

number = {2},

pages = {91-112},

abstract = {Textural relationships and compositional variations of (Fe;Mn)-(Ti;Sn)-(Nb;Ta) oxides and associated minerals from low- to moderately fractionated, mixed (NYF + LCT) anatectic pegmatites, which belong to the Julianna pegmatitic system, exposed at Piława Górna, Lower Silesia, Poland, were studied to elucidate the geochemical evolution of the pegmatite-forming melt. The primary Nb-Ta oxides crystallized in the following sequence: (1) columbite-(Fe) evolving to columbite-(Mn), associated with Nb- and Ta-bearing ilmenite-pyrophanite + almandine-spessartine garnet + Ti-poor schorl, (2) columbite-(Fe), (3) tantalite-(Fe), (4) Ti- and Sn-bearing ixiolite ± ferrowodginite ± Nb- and Ta-bearing cassiterite ± columbite-(Fe), all crystallizing along with Ti-enriched schorl evolving to dravite. The most characteristic features of the mineral assemblages are the reversed Mn-Fe fractionation trends and increasing Ca concentrations at the final stage of crystallization. These compositional variations are explained by a possible pre-emplacement contamination of the pegmatite-forming melt and re-equilibration of biotite and plagioclase from the early-crystallized outer zones of the pegmatites with rapidly cooling pegmatitic melt. Local changes in melt composition were of minor importance. Late alterations, such as chloritization and muscovitization of biotite or albitization of Ca-rich plagioclase were significant only at the hydrothermal stage.},

note = {17},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84880889018,

title = {Native selenium as a byproduct of microbial oxidation of distorted pyrite crystals: The first occurrence in the Carpathians},

author = { E. Szełęg and J. Janeczek and P. Metelski},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880889018&doi=10.2478%2fgeoca-2013-0017&partnerID=40&md5=ce208fba53dbf1343f1cbd09e4d42a29},

doi = {10.2478/geoca-2013-0017},

issn = {13350552},

year  = {2013},

date = {2013-01-01},

journal = {Geologica Carpathica},

volume = {64},

number = {3},

pages = {231-236},

abstract = {Acicular crystals of native selenium up to 30 μm long occur together with barite on the surface of goethite partial pseudomorphs after millimeter-sized pseudotetragonal-prismatic pyrite crystals in calcite veins that cross-cut Senonian sandstones of the Silesian Nappe in the western Polish Outer Carpathians. Native selenium originated from selenium apparently released during bacteria-induced oxidation of pyrite at neutral or near-neutral pH conditions. Oxidizing bacteria preferentially colonized {100} faces of pyrite relative {111} faces.},

note = {4},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-80052295294,

title = {Effects of weathering on organic matter. Part II: Fossil wood weathering and implications for organic geochemical and petrographic studies.},

author = { L. Marynowski and E. Szełęg and M.O. Jędrysek and B.R.T. Simoneit},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-80052295294&doi=10.1016%2fj.orggeochem.2011.06.017&partnerID=40&md5=2d8fab40809cd7465b8fcf2206c69cba},

doi = {10.1016/j.orggeochem.2011.06.017},

issn = {01466380},

year  = {2011},

date = {2011-01-01},

journal = {Organic Geochemistry},

volume = {42},

number = {9},

pages = {1076-1088},

abstract = {Bulk geochemical, petrographical, mineralogical and molecular compositions of unweathered, weathered and transitional zones of a Middle Jurassic fossil wood were analyzed to trace changes caused by oxidative weathering of the immature terrestrial organic matter (OM). The occurrence of such zones was confirmed by the mineral composition, showing replacement of siderite and pyrite by goethite. Vitrinite reflectance analysis of weathered and unweathered fossil wood samples revealed that weathering elevated the vitrinite reflectance values by ca. 0.1%, which should be taken into account during modeling of low maturity terrestrial OM. In the weathered part of the wood, most of the biomarkers and biomolecules were totally removed or the concentration decreased significantly. The concentration of most of the polynuclear aromatic hydrocarbons (PAHs) decreased by 50-80%, being >90% for the more reactive and less stable benzo[. a]pyrene and perylene. On the other hand, several aromatic compounds, like phenanthrene and its methyl derivatives, phenyl naphthalenes, fluoranthene and oxygen-containing aromatic compounds increased in concentration in the weathered zone. This results from processes such as formation of phenyl derivatives of PAHs and their cyclization, as well as aromatization of diterpenoids and incorporation of oxygen into aromatic structures. Weathering should always be considered in studies of fossilized terrestrial OM, especially in the case of thermal maturation modeling, because it significantly decreases the OM content and total sulfur content, changes vitrinite reflectance values and alters the extract composition as a result of organic compound degradation. © 2011 Elsevier Ltd.},

note = {40},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-1842689075,

title = {Preliminary data on blue celestine from Krasiejów, SW Poland [Wstȩpne dane o niebieskim celestynie z Krasiejowa]},

author = { G. Bzowska and I.O. Galuskina and E. Gałuskin and E. Szełęg},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-1842689075&partnerID=40&md5=19ee7ade91f37741f9d5a6ff113ef6e4},

issn = {00332151},

year  = {2004},

date = {2004-01-01},

journal = {Przeglad Geologiczny},

volume = {52},

number = {3},

pages = {214-215},

abstract = {[No abstract available]},

note = {3},

keywords = {},

pubstate = {published},

tppubtype = {article}

}