Discrimination of abiogenic and biogenic alkane gases

被引:47
作者
Dai JinXing [1 ,2 ]
Zou CaiNeng [1 ]
Zhang ShuiChang [1 ]
Li Jian [3 ]
Ni YunYan [3 ]
Hu Guoyi [3 ]
Luo Xia [3 ]
Tao ShiZhen [1 ]
Zhu GuangYou [1 ]
Mi JingKui [1 ]
Li ZhiSheng [3 ]
Hu AnPing [2 ]
Yang Chun [2 ]
Zhou QingHua [1 ]
Shuai YanHua [1 ]
Zhang Ying [3 ]
Ma ChengHua [3 ]
机构
[1] Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China
[2] Zhejiang Univ, Dept Earth Sci, Hangzhou 310027, Peoples R China
[3] Res Inst Petr Explorat & Dev, Langfang Branch, Lanfang 065007, Peoples R China
来源
SCIENCE IN CHINA SERIES D-EARTH SCIENCES | 2008年 / 51卷 / 12期
关键词
biogenic; abiogenic; alkane gas; discrimination; carbon isotope; helium isotope;
D O I
10.1007/s11430-008-0133-1
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
We have combined the analytical data of the carbon isotope distribution pattern, R/Ra and CH4/3He values of abiogenic and biogenic (referring to the thermogenic and bacterial or microbial) alkane gases in China with those of alkane gases from USA, Russia, Germany, Australia and other countries. Four discrimination criteria are derived from this comparative study: 1) Carbon isotopic composition is generally greater than -30C for abiogenic methane and less than -30C for biogenic methane; 2) Abiogenic alkane gases have a carbon isotopic reversal trend (delta 13C(1)> delta 13C(2)> delta 13C(3)> delta 13C(4)) with delta 13C(1)> -30C in general; 3) Gases with R/Ra > 0.5 and delta 13C(1)- delta 13C(2)> 0 are of abiogenic origin; 4) Gases (methane) with CH4/3He106 are of abiogenic origin, whereas gases with CH4/3He1011 are of biogenic origin.
引用
收藏
页码:1737 / 1749
页数:13
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