نتایج جستجو برای: meteorite

تعداد نتایج: 2201  

2006
Rainer Wieler Henner Busemann Ian A. Franchi

We review the inventories of primordial noble gases and nitrogen in meteorites, their carrier phases, how and where they may have been incorporated, as well as processes modifying their abundances on meteorite parent bodies. Some of the many distinct noble gas and nitrogen components have an isotopic composition very different from that in the Sun. These components reside in presolar grains. “A...

2015
Tim TOMKINSON Martin R. LEE Darren F. MARK Katherine J. DOBSON Ian A. FRANCHI

Northwest Africa (NWA) 5790 is the most recently discovered member of the nakhlite group. Its mineralogy differs from the other nakhlites with a high abundance mesostasis (38.1 3.6 vol%) and scarcity of olivine (4.0 2.2 vol%). Furthermore, zoning of augite phenocrysts, and other petrographic and chemical characteristics suggest that NWA 5790 samples the chilled margin of its parent lava flow/si...

Journal: :Proceedings of the United States National Museum 1923

Journal: :Journal of the Mineralogical Society of Japan 1976

Journal: :American Journal of Science 1864

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