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Geochemical signatures of Archean to Early Proterozoic Maria-scale oceanic impact basins

Glikson, Andrew

Description

Early Precambrian impact ejecta units-consisting of vapor-condensate spherules (microkrystites), microtektites, rip-up clasts and fragmental tsunami deposits-display high siderophile element (Ni, Co, platinum group elements [PGEs]) abundances and, in some instances, high V and Cr levels. The data allow an indirect insight into the composition of crustal regions from which the ejecta were derived, including the contribution of extraterrestrial components and the fractionation history of impact...[Show more]

CollectionsANU Research Publications
Date published: 2005
Type: Journal article
URI: http://hdl.handle.net/1885/84675
Source: Geology
DOI: 10.1130/G21034.1

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