DOI: 10.1016/j.epsl.2020.116725
论文题名: Mesoarchaean acidic volcanic lakes: A critical ecological niche in early land colonisation
作者: Agangi A. ; Hofmann A. ; Ossa Ossa F. ; Paprika D. ; Bekker A.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2021
卷: 556 语种: 英语
中文关键词: 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
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) Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165393
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
Agangi A.,Hofmann A.,Ossa Ossa F.,et al. Mesoarchaean acidic volcanic lakes: A critical ecological niche in early land colonisation[J]. Earth and Planetary Science Letters,2021-01-01,556