| DOI: | 10.1016/j.earscirev.2019.102927
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| 论文题名: | Archean banded iron formations of India |
| 作者: | Mukhopadhyay J.
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| 刊名: | Earth Science Reviews
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| ISSN: | 00128252
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| 出版年: | 2020
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| 卷: | 201 | | 语种: | 英语
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| 中文关键词: | Archean
; Bastar
; BIF
; Bundelkhand
; Dharwar
; Oxygenation
; Peninsular India
; Singhbhum
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| 英文关键词: | active margin
; Archean
; banded iron formation
; craton
; depositional environment
; greenstone belt
; lithology
; oxygenation
; passive margin
; supracrustal rock
; Bihar
; Bundelkhand
; Dharwar Craton
; India
; Singhbhum
|
| 英文摘要: | Archean banded iron formations (BIFs) are important lithologies for understanding the early Earth processes. Greenstone belts in the four Archean cratonic nucleii of peninsular India, namely, Singhbhum, Bastar, Dharwar, and Bundelkhand host BIF units that can be important candidates for case studies. The BIFs in these greenstone successions represent both Algoma- and Superior-type associations. The oldest record comes from the Paleoarchean Southern, Eastern and Western Iron Group of the Singhbhum craton and the Sargur supracrustals of the Dharwar craton. Mesoarchean and Neoarchean greenstone belts in the Dharwar and Bundelkhand cratons record a number of cycles of BIF deposition in a spectrum of depositional settings from manganiferous arenite-carbonate shelf associations to deep-water volcanics and graywacke associations. The BIFs from the Neoarchean Bailadila Group in the Bastar craton were deposited in siliciclastic shelf association. Compositional variations in major, trace and REE patterns have been evaluated from published data. High-grade iron ores are mainly mined from the BIFs and locally Mn-ores occur in association as well. Microbial carbonates associated with some of the Paleoarchean as well as Neoarchean iron-manganese formations suggest early life activities. The lithological association of the Archean iron formations have been explained in terms of both active margin and passive margin depositional settings. BIFs in association with manganiferous formations as old as Paleoarchean time provide an opportunity to probe into the redox stratification of oceanic hydrosphere and in turn the oxygenation of early atmosphere. © 2019 Elsevier B.V. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/166195
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| Appears in Collections: | 气候变化与战略
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作者单位: | Department of Geology, Presidency University, Kolkata, 86/1 College Street, Kolkata, 700073, India
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| Recommended Citation: | |
Mukhopadhyay J.. Archean banded iron formations of India[J]. Earth Science Reviews,2020-01-01,201
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