Graphitic Carbons and Biosignatures

被引：54

作者：

Bernard, Sylvain ^{[1
]}

Papineau, Dominic ^{[2
,3
]}

机构：

[1] Univ Paris 06, Sorbonne Univ, IMPMC, CNRS UMR 7590,IRD UMR 206,MNHN, F-75005 Paris, France

[2] UCL, London Ctr Nanotechnol, London WC1H 0AH, England

[3] UCL, Dept Earth Sci, London WC1H 0AH, England

来源：

ELEMENTS | 2014年 / 10卷 / 06期

关键词：

microfossils; degradation/preservation; diagenesis/metamorphism; experimental fossilization; abiotic processes; Archean/early life; METAMORPHIC ROCKS; WEST GREENLAND; BURGESS SHALE; JACK HILLS; PRESERVATION; MICROFOSSILS; LIFE; AUSTRALIA; SIGNATURE; DIAMONDS;

D O I：

10.2113/gselements.10.6.435

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：

The unambiguous identification of graphitic carbons as remains of life in ancient rocks is challenging because fossilized biogenic molecules are inevitably altered and degraded during diagenesis and metamorphism of the host rocks. Yet, recent studies have highlighted the possible preservation of biosignatures carried by some of the oldest graphitic carbons. Laboratory simulations are increasingly being used to better constrain the transformations of organic molecules into graphitic carbons induced by sedimentation and burial processes. These recent research advances justify a reevaluation of the putative biogenicity of numerous ancient graphitic carbons, including the presumed oldest traces of life on Earth.

引用

页码：435 / 440

页数：6

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