Limits in pyrolysis-GC-MS analysis of kerogen isolated from Archean cherts

被引：9

作者：

Bourbin, M. ^{[1
]}

Derenne, S. ^{[1
]}

Robert, F. ^{[2
]}

机构：

[1] UPMC, BioEMCo, UMR CNRS 7618, F-75252 Paris 05, France

[2] MNHN, LMCM, UMR CNRS 7202, F-75231 Paris 05, France

来源：

ORGANIC GEOCHEMISTRY | 2012年 / 52卷

关键词：

STRUCTURAL-CHARACTERIZATION;

D O I：

10.1016/j.orggeochem.2012.08.004

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：

Pyrolysis-GC-MS was recently proposed as an emerging technique for establishing biogenicity of 3.5 Gyr old insoluble organic matter in cherts (Derenne et al., 2008. Earth and Planetary Science Letters 272, 476-480). When applied to four kerogens isolated from Archean chert samples for biogenicity determination, this method highlights the importance of having a significant aliphatic component remaining in the kerogen. If not, fatty acid decarboxylation may bias the n-alkane distribution. However, in most cases, mature samples such as Archean cherts usually do not have such an aliphatic fraction. This shows the limits of the technique and the need for a new biogenicity marker. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：32 / 34

页数：3

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