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您的检索式：作者名="S.D.Deshmukh"
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| 1 | Geochemical constraints on the tectonic setting of the Sonakhan Greenstone Belt, Bastar Craton, Central India显示文摘The Neo-Archean Sonakhan Greenstone Belt(SGB) located in the north-eastern fringes of Bastar craton,Central India, is dominated by Basalts, Andesites, Dacites and Rhyolites association. Partial melting modeling on the SGB metabasalts indicates that these rocks were derived by20% melting of spinel peridotite. Fractional crystallisation modeling with REE reveal that the most evolved samples represent the product of fractional crystallization of least evolved magma with 35% plagioclase, 35% clinopyroxene,20% olivine, 5% magnetite and 5% ilmenite as fractionating minerals with 40% remaining magma. Depletion of HFSE with reference to the LILE and LREE/HFSE ratios and Nb, Zr anomalies in the multi-element diagram of the mafic rocks of SGB indicate Island arc magmatic setting.The enriched Th/Yb values further substantiate that the mantle arrays were modified by subduction-related fluids or melts. The general conclusions drawn indicate that the metabasalts from the SGB were formed as a result of subduction of an intraoceanic lithosphere in a fore-arc suprasubduction zone environment. | S.D.Deshmukh K.R.Hari P.Diwan M.P.Manu Prasanth | 2018 | Acta Geochimica2018，37，3： | 0 |
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