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Geochemical and isotopic signatures of Archaean to Palaeoproterozoic extraterrestrial impact ejecta/fallout units

Glikson, Andrew


Criteria allowing diagnostic identification of asteroid and comet impact fallout units (impactites), including fragmental ejecta, microtektites and microkrystite spherules (impact vapour condensates) comprise: (i) unique mineral fallout phases-shocked quartz grains, coesite and nano-diamonds; (ii) unique intra-microkrystite phases - Ni-chromite, Ni-nanonuggets and Ir-nanonuggets, condensed from vapour enriched in meteoritic components; (iii) geochemical features such as high abundance and...[Show more]

CollectionsANU Research Publications
Date published: 2005
Type: Journal article
Source: Australian Journal of Earth Sciences
DOI: 10.1080/08120090500170328


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