Geochemical correlation of pyrobitumen fills with host mid-Cretaceous Black Flysch Group (Basque-Cantabrian Basin, western Pyrenees)

被引：26

作者：

Agirrezabala, Luis M. ^{[1
]}

Dorronsoro, Carmen ^{[2
]}

Permanyer, Albert ^{[3
]}

机构：

[1] Euskal Herriko Unibertsitatea, Estratig Eta Paleontol Saila, Bilbao 48080, Basque Country, Spain

[2] Euskol Herriko Unibertsitatea, Kimika Aplikatua Saila, Donostia San Sebastian 20080, Basque Country, Spain

[3] Univ Barcelona, Dept Geoquim Petrol & Prospeccio Geol, Barcelona 08028, Catalonia, Spain

来源：

ORGANIC GEOCHEMISTRY | 2008年 / 39卷 / 08期

关键词：

D O I：

10.1016/j.orggeochem.2008.03.012

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Abundant syndepositional pyrobitumen fills occur within Albian hydrothermal vent carbonates of the organic-rich Black Flysch Group in the Basque-Cantabrian Basin, indicating that these carbonates were charged with Oil during Albian times. A carbon isotopic Study of pyrobitumens and samples of candidate oil generating rocks (Jurassic and Albian host rock units) as well as Carboniferous-sourced condensate Was undertaken to test an Albian Source hypothesis for the pyrobitumens. On the basis of similar isotopic ratio values, the pyrobitumens show a Strong positive correlation with the host Black Flysch Group. This is supported by Stahl-type curves and a Sofer plot, which show that the pyrobitumens best match the host Albian deposits, whereas the Jurassic source rock and the Carboniferous sourced condensate plot separately. This new Albian pyrobitumen-source correlation demonstrates the existence of an oil generating rock unrecognised till now in the Basque-Cantabrian Basin - the mid-Cretaceous Black Flysch Group. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：1185 / 1188

页数：4

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