气候变化领域集成服务门户(CCPortal): Mesoarchaean acidic volcanic lakes: A critical ecological niche in early land colonisation

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DOI	10.1016/j.epsl.2020.116725
	Mesoarchaean acidic volcanic lakes: A critical ecological niche in early land colonisation
	Agangi A.; Hofmann A.; Ossa Ossa F.; Paprika D.; Bekker A.
发表日期	2021
ISSN	0012821X
卷号	556
英文摘要	The antiquity of life in marine environments has been demonstrated, with examples of microfossils and stromatolites extending back to at least 3.5 billion years ago (Ga). In contrast, emerged land was likely a more challenging environment during the Archaean, and only sparse evidence of life in non-marine environments has so far been identified. Here we document the abundance of isotopically light carbon (with δ13C values from −46.6 to −31.3‰), diagnostic of a biogeochemical methane cycle or acetogenesis, in shale and sandstone deposited in ∼3 billion-years-old acidic volcanic lakes on the Kaapvaal Craton of southern Africa. A distinctive Al-rich mineral assemblage with abundant pyrophyllite in lacustrine sedimentary rocks bears similarity to modern volcanic rocks affected by circulation of hot acidic fluids. This is compounded with an enrichment of Ni, Mo, W, As and Cu in whole-rock analyses of sedimentary rocks, which is also observed in geothermal areas of modern volcanic environments. Analysis of early diagenetic pyrite in these sedimentary rocks indicates high nutrient level in the lake, which might reflect hydrothermal input with leaching of volcanic material. Despite the restricted and ephemeral nature of volcanic lakes, a highly productive and complex ecosystem established itself in this environment. Volcanic lakes during the Mesoarchaean thus served as an ecological niche for the development and diversification of microbial life on emerged continental landmasses. © 2020 The Author(s)
关键词	Dominion Group early life Kaapvaal Craton Mesoarchaean
英文关键词	Ecology; Lakes; Pyrites; Sedimentology; Silicate minerals; Volcanic rocks; Volcanoes; Complex ecosystems; Continental landmass; Geothermal areas; Marine environment; Mineral assemblage; Non-marine environments; Volcanic environment; Volcanic materials; Sedimentary rocks; Archean; crater lake; diagenesis; early Earth; microbial activity; microfossil; origin of life; paleobiology; paleoenvironment; pyrite; stromatolite; Kaapvaal Craton
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203015
作者单位	Department of Geology, University of Johannesburg, Auckland Park, 2006, South Africa; Department of Earth, Resource Science, Akita University, Akita, 010-8502, Japan; Department of Geosciences, University of Tuebingen, Tuebingen, 72074, Germany; Department of Earth and Planetary Sciences, University of California, Riverside, CA 92521, United States
推荐引用方式 GB/T 7714	Agangi A.,Hofmann A.,Ossa Ossa F.,et al. Mesoarchaean acidic volcanic lakes: A critical ecological niche in early land colonisation[J],2021,556.
APA	Agangi A.,Hofmann A.,Ossa Ossa F.,Paprika D.,&Bekker A..(2021).Mesoarchaean acidic volcanic lakes: A critical ecological niche in early land colonisation.Earth and Planetary Science Letters,556.
MLA	Agangi A.,et al."Mesoarchaean acidic volcanic lakes: A critical ecological niche in early land colonisation".Earth and Planetary Science Letters 556(2021).