岩石矿物学杂志2001，Vol.20Issue(2)：112-122,11.
桂北—湘南中生代玄武质岩石及其深源包体的地球化学性质和岩石成因探讨
Geochemistry and Petrogenesis of Mesozoic Basaltic Rocks and Their Deep-Source Enclaves in Northern Guangxi-Southern Hunan
摘要
Abstract
In the Mesozoic basaltic rocks from northern Guangxisouthern Hunan, there are abundant deep-source enclaves, which can be divided into peridotite, gabbro and intermediate-acid gneiss. Based on petrology and geochemistry of these rocks, the present paper indicates that Mesozoic basaltic rocks are products of partial melting of peridotite instead of being related to gabbro and intermediate-acid gneiss which are merely accidental enclaves. It is noteworthy that gabbro and gneiss in these deep-source enclaves show genetic connection of fractional crystallization. They are evolutionary products of underplated basaltic magma, which was intruded between the crust and the mantle in Proterozoic. The gabbro is of the cumulus phase of underplated magma, whereas the gneiss is the product of residual magma after the fractional crystallization of underplated magma.关键词
桂北—湘南/玄武质岩石/深源包体/地球化学性质分类
天文与地球科学引用本文复制引用
李昌年,钟称生,王方正,刘春芳..桂北—湘南中生代玄武质岩石及其深源包体的地球化学性质和岩石成因探讨[J].岩石矿物学杂志,2001,20(2):112-122,11.
