摘要
海南岛海西-印支期花岗岩具有一个较完整的演化系列。花岗质岩浆由混合岩进一步重熔而形成。岩浆演化过程中具有一定程度的分离结晶作用。花岗岩的原岩主要为上地壳的岩石,但混有来自下地壳的火成岩。
The origin of the Hercynian-Indosinian granites in Hainan Island is discussed on the basis of their petrology and geochemistry as well as their enclaves. It is concluded that the Hainan granites represent a continuous evolution series, and their source region is in the upper crust, with some lower crust rocks involved. The granitic magma was formed from further melting of earlier migmatite, and then experienced different degrees of fractional crystallization during its emplacement, resulting in the formation of a series of granites with successive but slight variations in their geochemical characteristics.
出处
《地球化学》
CAS
CSCD
北大核心
1990年第4期365-373,共9页
Geochimica
基金
国家自然科学基金
