A Paleoarchean coastal hydrothermal field inhabited by diverse microbial communities: The Strelley Pool Formation, Pilbara Craton, Western Australia

K. Sugitani, K. Mimura, M. Takeuchi, T. Yamaguchi, K. Suzuki, Ryoko Senda, Y. Asahara, S. Wallis, M. J. Van Kranendonk

研究成果: ジャーナルへの寄稿記事

22 引用 (Scopus)

抄録

The 3.4-Ga Strelley Pool Formation (SPF) at the informally named 'Waterfall Locality' in the Goldsworthy greenstone belt of the Pilbara Craton, Western Australia, provides deeper insights into ancient, shallow subaqueous to possibly subaerial ecosystems. Outcrops at this locality contain a thin (<3 m) unit of carbonaceous and non-carbonaceous cherts and silicified sandstones that were deposited in a shallow-water coastal environment, with hydrothermal activities, consistent with the previous studies. Carbonaceous, sulfide-rich massive black cherts with coniform structures up to 3 cm high are characterized by diverse rare earth elements (REE) signatures including enrichment of light [light rare earth elements (LREE)] or middle rare earth elements and by enrichment of heavy metals represented by Zn. The massive black cherts were likely deposited by mixing of hydrothermal and non-hydrothermal fluids. Coniform structures in the cherts are characterized by diffuse laminae composed of sulfide particles, suggesting that unlike stromatolites, they were formed dominantly through physico-chemical processes related to hydrothermal activity. The cherts yield microfossils identical to previously described carbonaceous films, small and large spheres, and lenticular microfossils. In addition, new morphological types such as clusters composed of large carbonaceous spheroids (20-40 μm across each) with fluffy or foam-like envelope are identified. Finely laminated carbonaceous cherts are devoid of heavy metals and characterized by the enrichment of LREE. This chert locally contains conical to domal structures characterized by truncation of laminae and trapping of detrital grains and is interpreted as siliceous stromatolite formed by very early or contemporaneous silicification of biomats with the contribution of silica-rich hydrothermal fluids. Biological affinities of described microfossils and microbes constructing siliceous stromatolites are under investigation. However, this study emphasizes how diverse the microbial community in Paleoarchean coastal hydrothermal environment was. We propose the diversity is at least partially due to the availability of various energy sources in this depositional environment including reducing chemicals and sunlight.

元の言語英語
ページ(範囲)522-545
ページ数24
ジャーナルGeobiology
13
発行部数6
DOI
出版物ステータス出版済み - 11 1 2015
外部発表Yes

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rare earth elements
Western Australia
microfossils
microbial communities
craton
microbial community
rare earth element
microfossil
hydrothermal activity
sulfides
heavy metals
heavy metal
stromatolite
waterfall
silicification
greenstone belt
massive sulfide
sandstone
chert
foams

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

これを引用

A Paleoarchean coastal hydrothermal field inhabited by diverse microbial communities : The Strelley Pool Formation, Pilbara Craton, Western Australia. / Sugitani, K.; Mimura, K.; Takeuchi, M.; Yamaguchi, T.; Suzuki, K.; Senda, Ryoko; Asahara, Y.; Wallis, S.; Van Kranendonk, M. J.

:: Geobiology, 巻 13, 番号 6, 01.11.2015, p. 522-545.

研究成果: ジャーナルへの寄稿記事

Sugitani, K, Mimura, K, Takeuchi, M, Yamaguchi, T, Suzuki, K, Senda, R, Asahara, Y, Wallis, S & Van Kranendonk, MJ 2015, 'A Paleoarchean coastal hydrothermal field inhabited by diverse microbial communities: The Strelley Pool Formation, Pilbara Craton, Western Australia', Geobiology, 巻. 13, 番号 6, pp. 522-545. https://doi.org/10.1111/gbi.12150
Sugitani, K. ; Mimura, K. ; Takeuchi, M. ; Yamaguchi, T. ; Suzuki, K. ; Senda, Ryoko ; Asahara, Y. ; Wallis, S. ; Van Kranendonk, M. J. / A Paleoarchean coastal hydrothermal field inhabited by diverse microbial communities : The Strelley Pool Formation, Pilbara Craton, Western Australia. :: Geobiology. 2015 ; 巻 13, 番号 6. pp. 522-545.
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abstract = "The 3.4-Ga Strelley Pool Formation (SPF) at the informally named 'Waterfall Locality' in the Goldsworthy greenstone belt of the Pilbara Craton, Western Australia, provides deeper insights into ancient, shallow subaqueous to possibly subaerial ecosystems. Outcrops at this locality contain a thin (<3 m) unit of carbonaceous and non-carbonaceous cherts and silicified sandstones that were deposited in a shallow-water coastal environment, with hydrothermal activities, consistent with the previous studies. Carbonaceous, sulfide-rich massive black cherts with coniform structures up to 3 cm high are characterized by diverse rare earth elements (REE) signatures including enrichment of light [light rare earth elements (LREE)] or middle rare earth elements and by enrichment of heavy metals represented by Zn. The massive black cherts were likely deposited by mixing of hydrothermal and non-hydrothermal fluids. Coniform structures in the cherts are characterized by diffuse laminae composed of sulfide particles, suggesting that unlike stromatolites, they were formed dominantly through physico-chemical processes related to hydrothermal activity. The cherts yield microfossils identical to previously described carbonaceous films, small and large spheres, and lenticular microfossils. In addition, new morphological types such as clusters composed of large carbonaceous spheroids (20-40 μm across each) with fluffy or foam-like envelope are identified. Finely laminated carbonaceous cherts are devoid of heavy metals and characterized by the enrichment of LREE. This chert locally contains conical to domal structures characterized by truncation of laminae and trapping of detrital grains and is interpreted as siliceous stromatolite formed by very early or contemporaneous silicification of biomats with the contribution of silica-rich hydrothermal fluids. Biological affinities of described microfossils and microbes constructing siliceous stromatolites are under investigation. However, this study emphasizes how diverse the microbial community in Paleoarchean coastal hydrothermal environment was. We propose the diversity is at least partially due to the availability of various energy sources in this depositional environment including reducing chemicals and sunlight.",
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AU - Suzuki, K.

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