open access

https://hdl.handle.net/2115/38471

Depositional Environments Revealed From Biomarkers in Sediments Deposited During the Mid-Cretaceous Oceanic Anoxic Events (OAEs) in the Vocontian Basin (SE France)

英語

Terrestrial input

2008

21st Century COE for Neo-Science of Natural History, Hokkaido University

Origin and Evolution of Natural Diversity : Proceedings of the International Symposium, The Origin and Evolution of Natural Diversity, held from 1-5 October 2007 in Sapporo, Japan

233-238

International Symposium, "The Origin and Evolution of Natural Diversity". 1–5 October 2007. Sapporo, Japan.

Biomarker and total sulfur (TS) analyses were carried out on laminated black shales and massive marls collected from Goguel level (OAE1a) and the Kilian and the Paquier levels (OAE1b) in the Vocontian Basin in southeast France. Total sulfur content and concentrations of thiophenes are abundant in the Goguel level, whereas furans and retene, which are originated from terrestrial plants, are predominant in the Kilian and the Paquier levels. These results suggests the expansion of intense anoxic waters to deep ocean during the deposition of Goguel level rather than during the periods covered by the Kilian and the Paquier levels. In contrast, the Kilian and the Paquier sediments are characterized by a large amount of terrestrial input. Therefore, it is inferred that OAE1a was associated with supplying a large amount of sulfur to the ocean, possibly by active volcanisms, whereas OAE1b was caused by a large amount of terrestrial matter and fresh water input.

会議発表論文

Version of Record

BA85842508