Ordinary chondrite metallography: Part 2. Formation of zoned and unzoned metal particles in relatively unshocked H, L, and LL chondrites
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چکیده
منابع مشابه
Zoned and Unzoned Metal Grains in the Ch Chondrites Alh
Introduction: CH chondrites are metal rich, fine-grained meteorites that have undergone relatively little thermal metamorphism [1]. Meibom et al. [2] proposed that the radially zoned metal grains found in CH and also in some CB chondrites recorded the formation of these grains by condensation of metal in the solar neb-ula. This conclusion was based on measured profiles of the minor elements Ni,...
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Ion-microprobe studies yield DO (5dO 2 0.52 z dO) values in magnetite from the Rumurti chondrite (RC) PCA91241 (which is paired with PCA91002) of 13.1 to 13.9‰, slightly higher than that in O from whole-rock R samples. Despite DO values in whole-rock RCs that are much (by ca. 1.6‰) higher than in whole-rock LL chondrites, the DO in R magnetite is much lower (by ca. 2‰) than the values (14 to 17...
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extraction and characterization of allium irancum plant extract and its application in the green synthesis of silver nano particles and oxidation of thiocarbony1 compounds
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DIFFUSION OF SIDEROPHILE ELEMENTS IN Fe METAL: APPLICATION TO ZONED METAL GRAINS IN CHONDRITES
Introduction The distribution of highly siderophile elements in planetary materials is controlled mainly by metal. Diffusion processes can control the distribution or re-distribution of these elements within metals, yet there is little systematic or appropriate diffusion data that can be used to interpret HSE concentrations in such metals. Because our understanding of isotope chronometry, redox...
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ژورنال
عنوان ژورنال: Meteoritics & Planetary Science
سال: 2003
ISSN: 1086-9379,1945-5100
DOI: 10.1111/j.1945-5100.2003.tb00008.x