Differentiation of metal-rich meteoritic parent bodies: I. Measurements of PGEs, Re, Mo, W, and Au in meteoritic Fe-Ni metal
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چکیده
منابع مشابه
MEASUREMENT OF PGEs , Re , Mo , W AND Au IN METEORITIC Fe - Ni METAL
Introduction: The concentrations of Ni, Ga, Ge, and Ir are typically used to assign an iron meteorite to one of the chemical groups [cf., 1-3]. The improvements in analytical techniques, mainly INAA, and the systematic study of a large number of iron meteorites resulted in the development of an extensive database on their chemical compositions [4] which has been used in deciphering the origins ...
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Introduction: There is now increasing evidence that the timescale between the formation of CAIs and of chondrules is < 1-2 Ma, and that the achondritic parent planets may have formed and differentiated within 2-4 Ma of the origin of the Solar System [1,2]. Long-lived chronometers (such as 187 Re
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Extensive collection efforts in Antarctica and the Sahara in the past 10 years have greatly increased the number of known meteorites. Groupings of meteorites according to petrologic, mineralogical, bulkchemical, and isotopic properties suggest the existence of 100–150 distinct parent bodies. Dynamical studies imply that most meteorites have their source bodies in the main belt and not among the...
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available online at http://meteoritics.org 553 © The Meteoritical Society, 2006. Printed in USA. The formation of plessite in meteoritic metal J. I. GOLDSTEIN1* and J. R. MICHAEL2 1Department of Mechanical and Industrial Engineering, 313 Engineering Lab, University of Massachusetts, 160 Governors Drive, Amherst, Massachusetts 01003, USA 2Materials Characterization Department, Sandia National La...
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Introduction: Lunar impact-melt breccias contain metal grains from the meteorites that formed the breccias. Because the breccias contain clastic material that may derive from older breccias, metal grains from earlier impacts may be present, too. The large subset of moderately mafic (8– 12% FeO), KREEP-rich (“LKFM”) melt breccias is particularly important because (1) these are the melt breccias ...
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ژورنال
عنوان ژورنال: Meteoritics & Planetary Science
سال: 2004
ISSN: 1086-9379,1945-5100
DOI: 10.1111/j.1945-5100.2004.tb00066.x