C isotopic variations in the lower–middle Frasnian (lower Upper Devonian) of the Rudny Altai

We conducted isotope–geochemical studies of the Upper Devonian of the Rudny Altai. Whole-rock carbon isotope analyses of the studied section represented by carbonate fore-reef facies reveal a negative excursion at the base of punctata Zone. When compared to conodont biofacies turnovers and the Upper...

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Bibliographic Details
Published in:Geological magazine 2015-05, Vol.152 (3), p.565-571
Main Authors: IZOKH, OLGA P., IZOKH, NADEZHDA G., SARAEV, STANISLAV V., DOKUKINA, GALINA A.
Format: Article
Language:English
Subjects:
Biodiversity
Carbon isotopes
Devonian
Geochemistry
Isotopes
Stratigraphy
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Summary:We conducted isotope–geochemical studies of the Upper Devonian of the Rudny Altai. Whole-rock carbon isotope analyses of the studied section represented by carbonate fore-reef facies reveal a negative excursion at the base of punctata Zone. When compared to conodont biofacies turnovers and the Upper Devonian events chart, the new data have demonstrated a synchronism between the negative excursion and the coeval decline in conodont biodiversity corresponding to the Middlesex anoxic event of the Frasnian Stage of the Upper Devonian.
ISSN:0016-7568
1469-5081
DOI:10.1017/S0016756814000703