气候变化领域集成服务门户(CCPortal): Thermochronologic perspectives on the deep-time evolution of the deep biosphere

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DOI	10.1073/pnas.2109609118
	Thermochronologic perspectives on the deep-time evolution of the deep biosphere
	Drake H.; Reiners P.W.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:45
英文摘要	The Earth's deep biosphere hosts some of its most ancient chemolithotrophic lineages. The history of habitation in this environment is thus of interest for understanding the origin and evolution of life. The oldest rocks on Earth, formed about 4 billion years ago, are in continental cratons that have experienced complex histories due to burial and exhumation. Isolated fracture-hosted fluids in these cratons may have residence times older than a billion years, but understanding the history of their microbial communities requires assessing the evolution of habitable conditions. Here, we present a thermochronological perspective on the habitability of Precambrian cratons through time. We show that rocks now in the upper few kilometers of cratons have been uninhabitable (>∼122 °C) for most of their lifetime or have experienced hightemperature episodes, such that the longest record of habitability does not stretch much beyond a billion years. In several cratons, habitable conditions date back only 50 to 300 million years, in agreement with dated biosignatures. The thermochronologic approach outlined here provides context for prospecting and interpreting the little-explored geologic record of the deep biosphere of Earth's cratons, when and where microbial communities may have thrived, and candidate areas for the oldest records of chemolithotrophic microbes. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Deep biosphere; Deep time; Evolution; Extremophiles; Thermochronology
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238317
作者单位	Department of Biology and Environmental Science, Linnæus University, Kalmar, 391 82, Sweden; Department of Geosciences, University of Arizona, Tucson, AZ 85721, United States
推荐引用方式 GB/T 7714	Drake H.,Reiners P.W.. Thermochronologic perspectives on the deep-time evolution of the deep biosphere[J],2021,118(45).
APA	Drake H.,&Reiners P.W..(2021).Thermochronologic perspectives on the deep-time evolution of the deep biosphere.Proceedings of the National Academy of Sciences of the United States of America,118(45).
MLA	Drake H.,et al."Thermochronologic perspectives on the deep-time evolution of the deep biosphere".Proceedings of the National Academy of Sciences of the United States of America 118.45(2021).