Rare-earth element geochemistry of banded iron formations and associated amphibolite from the Sargur belts, south India

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Kato, Y. and Kawakami, T. and Kano, T. and Kunugiza, K. and Swamy, N.S. (1996) Rare-earth element geochemistry of banded iron formations and associated amphibolite from the Sargur belts, south India. Rare-earth element geochemistry of banded iron formations and associated amphibolite from the Sargur belts, south India, 14 (13-14). ISSN 07439547

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Official URL: https://doi.org/10.1016/S0743-9547(96)00054-2

Abstract

Major and rare-earth elements (REE) of banded iron formations (BIFs) and associated amphibolite from the Sargur belts, the oldest schist belts in the Dharwar craton, were determined by X-ray fluorescence and inductively coupled plasma mass spectrometry (ICP-MS). The chondrite-normalized REE patterns of BIFs are light REE-enriched with a striking positive Eu anomaly, resembling those of modern hydrothermal solutions from the mid-oceanic ridge. Amphibolite is flat and chondritic in the REE plot. The Al2O3/TiO2 ratio of BIFs is about the same as that of amphibolite and is different from that of terrigenous elastics. These facts suggest that the BIFs were of hydrothermal origin and had a genetic relation to amphibolite, which may have originated from the Archaean mid-oceanic ridge basalt. Subtle negative or no Ce anomaly of BIFs indicates that contemporary seawater was less oxic than today. Copyright © 1996 Elsevier Science Ltd.

Item Type: Article
Additional Information: cited By 22
Uncontrolled Keywords: amphibolite; Archaean; banded iron formation; geochemistry; hydrothermal mineralization; REE, India, Dharwar Craton, Sargur Belts
Subjects: Faculty of Science > Earth Sciences > Geology
Divisions: Jnana Bharathi / Central College Campus > Department of Geology
Depositing User: Mr. Kirana Kumar D
Date Deposited: 02 Feb 2016 11:21
Last Modified: 12 Mar 2016 07:02
URI: http://eprints-bangaloreuniversity.in/id/eprint/496

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