2008
Racki, G.; Joachimski, M. M.; Morrow, J. R.
2008, ISSN: 00310182, (19).
@book{2-s2.0-54849410074,
title = {A major perturbation of the global carbon budget in the Early-Middle Frasnian transition (Late Devonian)},
author = { G. Racki and M.M. Joachimski and J.R. Morrow},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-54849410074&doi=10.1016%2fj.palaeo.2008.04.030&partnerID=40&md5=936d23731d982aa3a59dbed44a43e6ee},
doi = {10.1016/j.palaeo.2008.04.030},
issn = {00310182},
year = {2008},
date = {2008-01-01},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
volume = {269},
number = {3-4},
pages = {127-129},
abstract = {[No abstract available]},
note = {19},
keywords = {},
pubstate = {published},
tppubtype = {book}
}
[No abstract available]
2005
Riquier, L.; Tribovillard, N.; Averbuch, O.; Joachimski, M. M.; Racki, G.; Devleeschouwer, X.; albani, A. El; Riboulleau, A.
In: Developments in Palaeontology and Stratigraphy, vol. 20, no. C, pp. 199-224, 2005, ISSN: 09205446, (42).
@article{2-s2.0-33746410969,
title = {Chapter 8Productivity and bottom water redox conditions at the Frasnian-Famennian boundary on both sides of the Eovariscan Belt: constraints from trace-element geochemistry},
author = { L. Riquier and N. Tribovillard and O. Averbuch and M.M. Joachimski and G. Racki and X. Devleeschouwer and A. El albani and A. Riboulleau},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-33746410969&doi=10.1016%2fS0920-5446%2805%2980008-1&partnerID=40&md5=b797ffa2a45ea05f7e7c34db2d1b7f3c},
doi = {10.1016/S0920-5446(05)80008-1},
issn = {09205446},
year = {2005},
date = {2005-01-01},
journal = {Developments in Palaeontology and Stratigraphy},
volume = {20},
number = {C},
pages = {199-224},
publisher = {Elsevier},
abstract = {The Late Devonian Frasnian-Famennian (F-F) mass extinction event coincides in many places with the depositionof Corg-rich "Kellwasser" facies. Four F-F boundary sections representative of platform and basin environments from widely separated locations (Morocco; Germany; and France) were analysed for inorganic geochemistry, especially trace elements (redox and productivity proxies), in order to describe paleodepositional environments for the Kellwasser horizons. Ni/Co, V/Cr, U/Th, and V/(V+Ni) ratios, as well as redox trace metal concentrations indicate that oxygen-depleted conditions existed during the times of Kellwasser facies deposition. In platform settings, dysoxic conditions seem to be limited to the Late Frasnian. In basinal settings, oxygen depletion was stronger and persisted into the Early Famennian. Enrichments of Ba, Cu, Ni, that are limited to the Late Frasnian, show that surface productivity was relatively high and organic matter could accumulate, especially in the deeper environments. The stratigraphical distribution of several geochemical markers are linked with two positive excursions of the δ13Ccarb signal that result from enhanced organic matter burial. Reducing conditions likely resulted from high productivity of Late Devonian marine ecosystems. Intense nutrient supply resulted probably from the biogeochemical recycling of nutrients, and/or runoff from emerged lands. Coupled with other factors, such as rapid sea-level fluctuations and climatic changes, oxygen-depleted conditions and eutrophication would have modified Late Devonian environments and could be possible factors in the F-F mass mortality. © 2005 Elsevier B.V. All rights reserved.},
note = {42},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The Late Devonian Frasnian-Famennian (F-F) mass extinction event coincides in many places with the depositionof Corg-rich "Kellwasser" facies. Four F-F boundary sections representative of platform and basin environments from widely separated locations (Morocco; Germany; and France) were analysed for inorganic geochemistry, especially trace elements (redox and productivity proxies), in order to describe paleodepositional environments for the Kellwasser horizons. Ni/Co, V/Cr, U/Th, and V/(V+Ni) ratios, as well as redox trace metal concentrations indicate that oxygen-depleted conditions existed during the times of Kellwasser facies deposition. In platform settings, dysoxic conditions seem to be limited to the Late Frasnian. In basinal settings, oxygen depletion was stronger and persisted into the Early Famennian. Enrichments of Ba, Cu, Ni, that are limited to the Late Frasnian, show that surface productivity was relatively high and organic matter could accumulate, especially in the deeper environments. The stratigraphical distribution of several geochemical markers are linked with two positive excursions of the δ13Ccarb signal that result from enhanced organic matter burial. Reducing conditions likely resulted from high productivity of Late Devonian marine ecosystems. Intense nutrient supply resulted probably from the biogeochemical recycling of nutrients, and/or runoff from emerged lands. Coupled with other factors, such as rapid sea-level fluctuations and climatic changes, oxygen-depleted conditions and eutrophication would have modified Late Devonian environments and could be possible factors in the F-F mass mortality. © 2005 Elsevier B.V. All rights reserved.
2003
Kaczorowska, B.; Hacura, A.; Kupka, T.; Wrzalik, R.; Talik, E.; Pasterny, G.; Matuszewska, A.
Spectroscopic characterization of natural corals Journal Article
In: Analytical and Bioanalytical Chemistry, vol. 377, no. 6, pp. 1032-1037, 2003, ISSN: 16182642, (38).
@article{2-s2.0-1542575062,
title = {Spectroscopic characterization of natural corals},
author = { B. Kaczorowska and A. Hacura and T. Kupka and R. Wrzalik and E. Talik and G. Pasterny and A. Matuszewska},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-1542575062&doi=10.1007%2fs00216-003-2153-1&partnerID=40&md5=7fed490d223ec5563e145a83828091d5},
doi = {10.1007/s00216-003-2153-1},
issn = {16182642},
year = {2003},
date = {2003-01-01},
journal = {Analytical and Bioanalytical Chemistry},
volume = {377},
number = {6},
pages = {1032-1037},
abstract = {The FTIR, micro-Raman, NMR, and XPS spectra of 25 different natural corals have been compared. Reflectance and transmission absorbance IR and Raman data have been used as rapid and efficient means of classification of natural corals containing aragonite (non-precious white species), calcite (red, pink, precious white species), and organic material (black protein polymer). The combination of reflectance IR and infrared microscopy could serve as a rapid, non-destructive method for distinguishing natural corals from artificial, fake jewels. © Springer-Verlag 2003.},
note = {38},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The FTIR, micro-Raman, NMR, and XPS spectra of 25 different natural corals have been compared. Reflectance and transmission absorbance IR and Raman data have been used as rapid and efficient means of classification of natural corals containing aragonite (non-precious white species), calcite (red, pink, precious white species), and organic material (black protein polymer). The combination of reflectance IR and infrared microscopy could serve as a rapid, non-destructive method for distinguishing natural corals from artificial, fake jewels. © Springer-Verlag 2003.
2001
Joachimski, M. M.; Ostertag-Henning, C.; Pancost, R. D.; Strauss, H.; Freeman, K. H.; Littke, R.; Damsté, J. S. Sinninghe; Racki, G.
In: Chemical Geology, vol. 175, no. 1-2, pp. 109-131, 2001, ISSN: 00092541, (193).
@article{2-s2.0-0035012187,
title = {Water column anoxia, enhanced productivity and concomitant changes in δ13C and δ34S across the Frasnian-Famennian boundary (Kowala - Holy Cross Mountains/Poland)},
author = { M.M. Joachimski and C. Ostertag-Henning and R.D. Pancost and H. Strauss and K.H. Freeman and R. Littke and J.S. Sinninghe Damsté and G. Racki},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0035012187&doi=10.1016%2fS0009-2541%2800%2900365-X&partnerID=40&md5=ede010acd5e8f204d716f6fc83aaca42},
doi = {10.1016/S0009-2541(00)00365-X},
issn = {00092541},
year = {2001},
date = {2001-01-01},
journal = {Chemical Geology},
volume = {175},
number = {1-2},
pages = {109-131},
abstract = {The investigation of the trace element and organic geochemistry of the Frasnian-Famennian boundary section at Kowala (Holy Cross Mountains/Poland) shows that the lower water column was oxygen-deficient during late Frasnian and early Famennian times. The abundance and carbon isotopic composition of diaryl isoprenoids, biomarkers indicative for green sulfur bacteria, prove that euxinic waters reached into the photic zone, at least episodically. Total organic carbon (TOC) contents show two maxima that are time-equivalent to the Kellwasser horizons deposited in shallower water settings. Enhanced TOC concentrations are explained by a higher primary productivity, presumably as a consequence of an enhanced nutrient supply from the continent. The increase in the abundance of hopanes and bituminite suggests that the bacterial contribution to TOC increased at the Frasnian-Famennian transition. The sulfur isotopic composition of pyritic- and organically bound sulfur shows a +27‰ excursion across the boundary. The observation that the δ34S values of organic-bound sulfur closely resemble that of pyrite sulfur indicates a common sulfur source, likely early diagenetic sulfide. A change in the δ13C of total dissolved inorganic carbon as a consequence of an enhanced burial of 12C-enriched organic carbon is indicated by a + 3‰ excursion measured for TOC as well as for individual n-alkanes and isoprenoids. The burial of large amounts of organic carbon is expected to result in a decrease in pCO2 and should affect the photosynthetic carbon isotope fractionation (εp). The fact that we observe no change in Ep can be explained by the circumstance that Ep was most probably at maximum values, as a consequence of high atmospheric and oceanic-dissolved CO2 concentrations during the Devonian. © 2001 Elsevier Science B.V. All rights reserved.},
note = {193},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The investigation of the trace element and organic geochemistry of the Frasnian-Famennian boundary section at Kowala (Holy Cross Mountains/Poland) shows that the lower water column was oxygen-deficient during late Frasnian and early Famennian times. The abundance and carbon isotopic composition of diaryl isoprenoids, biomarkers indicative for green sulfur bacteria, prove that euxinic waters reached into the photic zone, at least episodically. Total organic carbon (TOC) contents show two maxima that are time-equivalent to the Kellwasser horizons deposited in shallower water settings. Enhanced TOC concentrations are explained by a higher primary productivity, presumably as a consequence of an enhanced nutrient supply from the continent. The increase in the abundance of hopanes and bituminite suggests that the bacterial contribution to TOC increased at the Frasnian-Famennian transition. The sulfur isotopic composition of pyritic- and organically bound sulfur shows a +27‰ excursion across the boundary. The observation that the δ34S values of organic-bound sulfur closely resemble that of pyrite sulfur indicates a common sulfur source, likely early diagenetic sulfide. A change in the δ13C of total dissolved inorganic carbon as a consequence of an enhanced burial of 12C-enriched organic carbon is indicated by a + 3‰ excursion measured for TOC as well as for individual n-alkanes and isoprenoids. The burial of large amounts of organic carbon is expected to result in a decrease in pCO2 and should affect the photosynthetic carbon isotope fractionation (εp). The fact that we observe no change in Ep can be explained by the circumstance that Ep was most probably at maximum values, as a consequence of high atmospheric and oceanic-dissolved CO2 concentrations during the Devonian. © 2001 Elsevier Science B.V. All rights reserved.
1999
Racki, G.; Matyja, H.; Racka, M.; Joachimski, M. M.
In: Przeglad Geologiczny, vol. 47, no. 4, pp. 369-372, 1999, ISSN: 00332151, (5).
@article{2-s2.0-0033392167,
title = {Biostratigraphical and geochemical problems with identification of the Frasnian-Famennian boundary in the southern Poland [Biostratygraficzne i geochemiczne problemy identyfikacji granicy fran-famen w poludniowej Polsce]},
author = { G. Racki and H. Matyja and M. Racka and M.M. Joachimski},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0033392167&partnerID=40&md5=48795a049d4b7429a7e642fe6448a95f},
issn = {00332151},
year = {1999},
date = {1999-01-01},
journal = {Przeglad Geologiczny},
volume = {47},
number = {4},
pages = {369-372},
abstract = {High-resolution conodont studies of reference Frasnian-Famennian (F-F) sections in the Holy Cross Mts (Kowala) and Cracow area (Debnik) revealed difficulties in the biostratigraphical recognition of this natural stage boundary corresponding to the major extinction event, as well as documentation of its supposed geochemical peculiarity. Surprisingly graded pattern of the conodont succession across the critical level is documented, manifested primarily in co-occurrence of typical Frasnian palmatolepids and ancyrodellids with the broadly variable diagnostic Famennian species Palmatolepis triangularis (encompassing praetriangularis morphotype). Carbon isotopic (both carbonate and organic) and trace element profiles of the F-F boundary sensu stricto point to generally 'quiet', uneventful aspect of the interval, but maybe marked by highest productivity levels. Most significant oceanographic changes are linked with onset of the transgressive-hypoxic Kellwasser Event, still within the latest Frasnian linguiformis Chron, i.e. well before the conodont collapse. All the data support an extended in time, multicausal Earth-bound causation instead of a worldwide cosmic catastrophe.},
note = {5},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
High-resolution conodont studies of reference Frasnian-Famennian (F-F) sections in the Holy Cross Mts (Kowala) and Cracow area (Debnik) revealed difficulties in the biostratigraphical recognition of this natural stage boundary corresponding to the major extinction event, as well as documentation of its supposed geochemical peculiarity. Surprisingly graded pattern of the conodont succession across the critical level is documented, manifested primarily in co-occurrence of typical Frasnian palmatolepids and ancyrodellids with the broadly variable diagnostic Famennian species Palmatolepis triangularis (encompassing praetriangularis morphotype). Carbon isotopic (both carbonate and organic) and trace element profiles of the F-F boundary sensu stricto point to generally 'quiet', uneventful aspect of the interval, but maybe marked by highest productivity levels. Most significant oceanographic changes are linked with onset of the transgressive-hypoxic Kellwasser Event, still within the latest Frasnian linguiformis Chron, i.e. well before the conodont collapse. All the data support an extended in time, multicausal Earth-bound causation instead of a worldwide cosmic catastrophe.