PT-RE-OS SYSTEMATICS OF GROUP IIAB AND IIIAB IRON METEORITES

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dc.contributor.author Cook D.L.
dc.contributor.author Walker R.J.
dc.contributor.author Horan M.F.
dc.contributor.author Wasson J.T.
dc.contributor.author Morgan J.W.
dc.date.accessioned 2022-03-23T07:44:04Z
dc.date.available 2022-03-23T07:44:04Z
dc.date.issued 2004
dc.identifier https://www.elibrary.ru/item.asp?id=12090632
dc.identifier.citation Geochimica et Cosmochimica Acta, 2004, 68, 6, 1413-1431
dc.identifier.issn 0016-7037
dc.identifier.uri https://repository.geologyscience.ru/handle/123456789/36554
dc.description.abstract The Pt-Re-Os isotopic and elemental systematics of 13 group IIAB and 23 group IIIAB iron meteorites are examined. As has been noted previously for iron meteorite groups and experimental systems, solid metal-liquid metal bulk distribution coefficients (D values) for both IIAB and IIIAB systems show DOs>DRe>>DPt>1 during the initial stages of core crystallization. Assuming closed-system crystallization, the latter stages of crystallization for each core are generally characterized by DPt>DRe>DOs. The processes governing the concentrations of these elements are much more complex in the IIIAB core relative to the IIAB core. Several crystallization models utilizing different starting parameters and bulk distribution coefficients are considered for the Re-Os pair. Each model has flaws, but in general, the results suggest that the concentrations of these elements were dominated by equilibrium crystallization and subsequent interactions between solid metal and both equilibrium and evolved melts. Late additions of primitive metal to either core were likely minor or nonexistent.
dc.title PT-RE-OS SYSTEMATICS OF GROUP IIAB AND IIIAB IRON METEORITES
dc.type Статья


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