沉积与特提斯地质2018，Vol.38Issue(1)：82-88,7.
大巴山前缘五峰组-龙马溪组干酪根碳同位素特征与有机质类型
Carbon isotopes and organic matter types in the kerogens from the Wufeng Formation-Longmaxi Formation in the frontal areas of the Daba Mountains
摘要
Abstract
The argument still remains current for the organic matter types in the kerogens from the Wufeng Formation-Longmaxi Formation in the frontal areas of the Daba Mountains. The present paper presents the carbon isotopic analyses of kerogens,total organic carbon contents and organic matter maturity for the samples collected from the stratigraphic sections including the Caojia section in Wanyuan,the Zhouxi section in Chengkou,the Tianba and Bailu sections in Wuxi,and the Lianghekou section in Badong,and gives the δ13 C values from -31. 1‰to -28. 2‰ for the Wufeng Formation-Longmaxi Formation. There are correlations between δ13 C values,total organic carbon contents and maturity of organic matter. There is a negative linear correlation between the organic carbon contents and δ13 C values while the maturity values are less than 2％,and a linear positive correlation between the maturity values and δ13 C values while the maturity values are more than 2％ . Referenced to the previous classification schemes,the organic matter types in the Wufeng Formation-Longmaxi Formation are assigned to the type I (sapropelic)and type II-1 (humosapropelic),which are graded from the type I organic matter in the Tianba section in Wuxi to the type II-1 organic matter eastwards and westwards.关键词
五峰组/龙马溪组/干酪根碳同位素/有机质类型Key words
Wufeng Formation/Longmaxi Formation/carbon isotope/organic matter type分类
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门玉澎,余谦,戚明辉,孙媛媛,闫剑飞,康建威,林家善,赵安坤..大巴山前缘五峰组-龙马溪组干酪根碳同位素特征与有机质类型[J].沉积与特提斯地质,2018,38(1):82-88,7.基金项目
四川盆地页岩气基础地质调查 （）
