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从汉诺坝新生代玄武岩中岩浆底侵成因的麻粒岩相和榴辉岩相堆晶岩、橄榄岩和辉石岩捕虏体的岩石矿物组合、岩石结构、矿物学、主微量元素和同位素地球化学特征, 讨论和限定了壳-幔边界岩石组成, 并得到岩石高温高压波速实验和深部地球物理探测结果的支持. 现今下部下地壳主要由麻粒岩相镁铁质堆晶岩(以斜长二辉岩为主)组成; 壳-幔过渡带主要由榴辉岩相石榴辉石岩、辉石岩和尖晶石二辉橄榄岩等组成; 太古代地体麻粒岩只是名义上的早期下地壳. 发生在壳-幔边界的岩浆底侵作用导致地壳的垂向增生和壳-幔过渡带的形成, 是显生宙以来壳-幔边界组成和化学调整的重要机制.
From the granulite and eclogite facies conglomerate, peridotite and pyroxenite xenoliths in the Cenozoic basalts from the Hannoba Dam to the genetic alteration of rock magmatism, lithology and mineral assemblage, rock structure, mineralogy, major and minor elements and Isotope geochemistry, discuss and define the crust-mantle boundary rock composition, and get the rock high temperature and high pressure wave velocity experiment and deep geophysical exploration results support.Nowadays the lower crust is mainly composed of granulite facies mafic pluton Mainly composed of long-eclogite); the crust-mantle transitional zone mainly consists of eclogite-type pyroxene, pyroxene and spinel lherzolites; Archean terrigenous granulites are only under the nominally early The magmatic underplating at the crust-mantle boundary led to the vertical crustal hyperplasia and crust-mantle transition zone formation, which is an important mechanism for the composition and chemical adjustment of the crust-mantle boundary since the Phanerozoic.