magma source area quality 岩浆源区性质
The difference in magma source area is the fundamental cause for the appreciable difference in mineralization between the Dabie area and the lower Yangtze Valley area in the Yanshanian.
岩浆源区的不同是造成大别地区和下扬子地区成矿作用重大差别的根本原因。
The element-geochemical features reflect that the magma comes from enriched mantle and that hybridism of continental crust occurs in the source area.
火山岩的元素地球化学特征反映岩浆来自富集地幔，在源区存在陆壳的混染作用。
The chemical variation of the volcanics are controlled by both residual of plagioclase in the melting source area and crystal fractionation of biotite after magma formation.
认为火山岩的成分分异受斜长石在岩浆源区熔融残留和岩浆形成后黑云母的结晶分离双重控制。
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