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Carbon isotope geochemistry and palaeontology of Neoproterozoic to early Cambrian siliciclastic successions in the East European Platform, Poland

Published online by Cambridge University Press:  01 January 1997

HARALD STRAUSS ,
GONZALO VIDAL ,
MAŁGORZATA MOCZYDŁOWSKA  and
JOLANTA PACZEŚNA
HARALD STRAUSS
Affiliation:
Ruhr-Universität Bochum, Institut für Geologie, D-44780 Bochum, Germany
GONZALO VIDAL
Affiliation:
Uppsala University, Institute of Earth Sciences, Micropalaeontology, Norbyvägen 22, S-75236 Uppsala, Sweden
MAŁGORZATA MOCZYDŁOWSKA
Affiliation:
Uppsala University, Institute of Earth Sciences, Micropalaeontology, Norbyvägen 22, S-75236 Uppsala, Sweden
JOLANTA PACZEŚNA
Affiliation:
Polish Geological Institute Ul., Rakowiecka 4, 00–975 Warsaw, Poland
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Abstract

A well-preserved stratigraphic record of the organic carbon isotopic composition across the Precambrian–Cambrian transition has been obtained from a sequence of entirely detrital rocks underlying the Lublin Slope, East European Platform, Poland. The observed δ13C pattern for organic carbon is comparable to isotope data determined for coeval carbonate platform sequences elsewhere. These results underline the truly global nature of these secular variations within the carbon cycle during the terminal Proterozoic and early Cambrian, largely independent of host lithology and facies. The direct combination of micropalaeontological and geochemical results from sedimentary organic matter allows a detailed interpretation of the isotope record as probably caused by secular changes in the net balance of burial and erosion rates of repositories of organic carbon. Furthermore, these variations appear to be directly correlatable with changes in the diversity and abundance of the biota and radiation/extinction events.

Type
Research Article
Information
Geological Magazine , Volume 134 , Issue 1 , January 1997 , pp. 1 - 16
Copyright
© 1997 Cambridge University Press

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