نتایج جستجو برای: ultramafic rocks
تعداد نتایج: 22653 فیلتر نتایج به سال:
The ore bodies of Galali and Baba-Ali are two relatively important iron ore deposits in west Iran. These ore deposits are situated in the Sanandaj-Sirjan zone. The deposits are associated with ultramafic, calc-alkaline, carbonatite and other rocks. Macroscopic observations, on the boreholes, show that one of the rare ultramafic rocks (hornblendite) appears in all various horizons parallel to m...
Xenoliths of quartz-absent Fe-rich aluminous metapelite are common within the platinum group element-rich mafic ⁄ultramafic magmatic rocks of the Platreef. Relative to well-characterized protoliths, the xenoliths are strongly depleted in K2O and H2O, and have lost a substantial amount of melt (>50 vol.%). Mineral equilibria calculations in the NCKFMASHTO system yield results that are consistent...
s and Publications: Johnson, N. C., Thomas B. Maher, K., Bird, D. K., Rosenbauer, R. Brown, G. E. Jr. (2011) Adsorption of organic ligands on silicate mineral surfaces in the presence of CO2 and water: Insight into olivine dissolution rates. Goldschmidt Conference, Prague, Czech Republic. Johnson N. C., Thomas B., Maher K., Bird D. K., Rosenbauer R. J., Brown G. E. Jr. (2011) Kinetics of olivin...
Uplifted ultramafic rocks represent an important vector for the transfer of carbon and reducing power from the deep subsurface into the biosphere and potentially support microbial life through serpentinization. This process has a strong influence upon the production of hydrogen and methane, which can be subsequently consumed by microbial communities. The Santa Elena Ophiolite (SEO) on the north...
Hasht-Sar Kaleybar mafic, ultramafic and syenitic dykes are surrounded by Majid Abad Formation, Palaeocene age, volcanic deposits. The suite is restricted within the Horand, Mahmud Abad and Mokhtekan thrust and reverse faults. Clinopyroxenites, the oldest unit of the suite, have tholeiitic volcanic arc character and have some similarities with tectonite layer of oceanic crust, like Group A pyro...
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