| | Journal (article/letter/editorial) | Magmatic System and Genesis of Abiogenic Hydrocarbons in Alkaline Plutons I. D. Ryabchikova and L. N. Kogarkob...Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Staromonetnyi...119017 Russia b Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences...Received October 10, 2008 Abstract—The temperature and redox conditions of the crystallization of rocks...analysis of coexisting magnetite, ilmenite, titanite, and pyroxene. Under redox conditions characteristic of | | | Journal (article/letter/editorial) | (Grimaldi Seamounts) S. G. Skolotnev, V. V. Petrova, and A. A. Peyve Geological Institute, Russian Academy...composition, geochemistry, isotopic characteristics, and age of rocks from the Carter Seamount of the Grimaldi...Together with other seamounts of the Grimaldi system and the Nadir Seamount, it forms a “hot line” related...is made up of olivine melilitites, ankaramites, and analcimebearing nepheline tephrites, which are differentiated...the oceanic crust, which was formed at 113–115 Ma, and earlier magma chambers. The rocks were altered by | | | Journal (article/letter/editorial) | elsevier.com/locate/lithos Magnetite compositions and oxygen fugacities of the Khibina magmatic system...cross-section, is represented by Ti-rich varieties. The ulvöspinel component is most commonly around 55 mol%, rarely...titanite + clinopyroxene + nepheline + alkali feldspar and magnetite + titanite+ clinopyroxene + nepheline +...diagram shows that magnetites with 55 mol% of ulvöspinel crystallized at oxygen fugacities just slightly...Ti-rich varieties crystallized at higher temperatures and slightly lower ΔQMF values, whereas more Ti-poor | | | Journal (article/letter/editorial) | Ryabchikova and L. N. Kogarkob a Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry...iryab@igem.ru b Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences...minerals (magnetite, ilmenite, titanite, and pyroxene), the temperature and redox conditions of rock crystallization...ëé2 in fluid and carbonate anions in melt at high temperatures; then, graphite formation; and, at lower...the main parameters of the evolution of the Earth and other cosmic bodies. It controls the behavior of |
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