Origins of partially reversed alkane δ13C values for biogenic gases in China

被引：248

作者：

Dai, JX ^{[1
]}

Xia, XY ^{[1
]}

Qin, SF ^{[1
]}

Zhao, JZ ^{[1
]}

机构：

[1] PetroChina, Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China

来源：

ORGANIC GEOCHEMISTRY | 2004年 / 35卷 / 04期

关键词：

D O I：

10.1016/j.orggeochem.2004.01.006

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：

With increasing molecular weight, VC values of hydrocarbon gases change in two different manners: the normal order would be delta(13)C(1)<δC-13(2)<δC-13(3) <delta(13)C(4), whereas the reversed order would be delta(13)C(1) > delta(13) C-2> delta(13) C-3 > delta(13) C-4\. Partially reversed order is common in gas samples from sedimentary basins in China, which can be attributed to one or several of the following four mixing processes: (a) mixing of biogenic and abiogenic gases; (b) mixing of sapropelic and humic sourced gases; (c) mixing of gases from the same types of source rocks with different maturity; and (d) mixing of gases from the same source rock interval of varying maturity. (C) 2004 Published by Elsevier Ltd.

引用

页码：405 / 411

页数：7

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