منابع مشابه
Igneous Petrogenesis of Yamato Nakhlites
Introduction: We have carried out detailed petrographical-mineralogical description of three Yamato nakhlites (Y000593, Y000749 and Y000802). These three are paired. We clarified chemical compositional differences between the Yamato nakhlites and other nakhlites, and subclassified the Yamato nakhlites as an intermediate type between NWA817 and others (Nakhla, Governador Valadares and Lafayette)...
متن کاملPetrogenesis of lunar meteorite EET 96008
Lunar meteorite EET 96008 is a fragmental breccia that predominantly consists of basaltic mineral clasts (0.5–2 mm), along with minor lithic fragments and breccia clasts. The matrix consists mainly of smaller mineral fragments ( 0.5 mm), bound by glassy cement, the majority of which are pyroxene and plagioclase. The pyroxene possesses extensive exsolution lamellae. These lamellae, up to 1 m in ...
متن کاملPetrogenesis of Mount St. Helens Dacitic Magmas
The most frequent and voluminous eruptive Kurasawa, 1983], (4) partial melting of the lower crust products at Mount St. Helens are dacitic in composition, [e.g., Grant et al., 1984; Reid and Cole, 1983], and (5) although a wide variety of magma types (basalt to formation of compositional gradients in response to rhyodacite) is represented. To address the petrogenesis of convective and diffusive...
متن کاملExperimental Investigations of Ureilite Petrogenesis: Relationships
Introduction: We have conducted melting experiments on liquids predicted to be in equilibrium with ureilites to explore the phase relations of the smelting reaction and understand the relations between ureilites. Correlations of modal mineralogy, mineral chemistry and texture are consistent with smelting as a major process involved in ureilite petrogenesis [1]. Although ureilites resemble igneo...
متن کاملPetrogenesis of Augite-Bearing Ureilites: A LA-ICP-MS Approach
1,2 , M. Humayun 1 , H. Downes 3 , S. Singletary 4 , J. A. Van Orman 5 and S. B. Jacobsen 2 1 National High Magnetic Field Laboratory and Department of Geological Sciences, [email protected]; 2 Department of Earth and Planetary Sciences, Harvard University; 3 School of Earth Sciences, Birkbeck University of London; 4 Department of Natural Sciences, Fayetteville State University; 5 Departm...
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ژورنال
عنوان ژورنال: Nature
سال: 1906
ISSN: 0028-0836,1476-4687
DOI: 10.1038/074242a0