期刊
PRECAMBRIAN RESEARCH
卷 169, 期 1-4, 页码 28-47出版社
ELSEVIER
DOI: 10.1016/j.precamres.2008.10.011
关键词
Biomarker; Archean; Molecular fossil; Oxygen; Sterane; Triterpane; Transvaal
资金
- NASA [NNG05GN62G, NNG04GJ13G]
- NSF [EAR0418619]
- Agouron Institute
- National Science Foundation
Cores recovered during the Agouron Griqualand Drilling Project contain over 2500 m of well-preserved late Archean Transvaal Supergroup sediments, dating from ca. 2.67 to 2.46 Ga. Bitumen extracts of these strata were obtained using clean drilling, sampling and analysis protocols that avoided overprinting syngenetic molecular fossil signatures with contaminant hydrocarbons. Comparisons of biomarker contents in stratigraphically correlated intervals from diverse lithofacies in two boreholes separated by 24 km, as well as across a similar to 2 Gyr unconformity, provide compelling support for their syngenetic nature. The suite of molecular fossils identified in the late Archean bitumens includes hopanes attributable to bacteria, potentially including cyanobacteria and methanotrophs, and steranes of eukaryotic origin. This molecular fossil record supports an origin in the Archean Eon of the three Domains of cellular life, as well as of oxygenic photosynthesis and the anabolic use of O-2. (c) 2009 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据