早白垩世晚期玄武岩成因探讨

玄武岩作为地球上分布最为广泛的火成岩之一,是地质学研究的重要对象。对前人研究工作的系统总结,不同玄武岩形成的控制因素主要有地幔类型、源区特征、部分熔融程度、岩浆起源深度、结晶分异、地壳与地幔及岩石圈和软流圈之间的圈层作用。本文主要从部分熔融程度、岩浆起源深度、源区特征及各圈层间的相互作用等方面对玄武岩的成因进行了较详细的概括。虽然赣南-粤北地区早白垩世晚期玄武岩的地质时代归属、岩石学特征、岩石系列的划分有了一定程度的认识,但仍存在一些问题有待深入研究。

Exploring of Basalt Causation From Late Phase of early Cretaceous

Basalt is one of the most widely distributed lgneous as a major subject of study for geology in the earth.Summarizing systematically the research of predecessors,the controlling factors of different basalt causation include mantle types,source characters,partly fusing class,depth of magma origin,crystal fractionation and the interaction between crust,mantle and lithosphere and asthenosphere.The causation of basalt mainly including partly fusing class,depth of magma origin,crystal fractionation and the interaction of different horizons are epitomized in detail in this chapter.Basalt geological age,petrological character and rock series from late phase of early cretaceous in south Jiangxi and north Guangdong have a certain cogntion,but a lot of issues need research in depth.