华南印支期花岗岩研究进展及意义

Advance and Significance of Indosinian Granite in South China

在总结有关于近年来华南地区印支期花岗岩研究的基础上,对花岗岩的主量元素、微量元素及稀土元素等方面进行了一系列的研究与讨论。通过主量元素各投图发现,多数印支期花岗岩的地球化学特征相似,岩浆演化经历了斜长石的分离结晶作用;华南印支期花岗岩主要分为高钾钙碱性过铝-强过铝质花岗岩;印支期花岗岩稀土元素有明显的M型四分组效应特征,Nb明显相对Ta亏损,物源判别图解表明:其来自于大陆地壳变沉积岩和大陆地壳沉积岩的部分熔融,少部分可能存在幔源物质参与。

In this paper, based on the study of the Indosinian granite in southern China in recent years, a series of research and discussion on the main elements, trace elements and rare earth elements of granite are carried out. It is found that the geochemical characteristics of most Indosinian granites are similar to those of the main element elements, and the magmatic evolution has undergone the separation and crystallization of the plagioclase. The Indosinian granites in South China are mainly divided into high-calcium calc-alkaline granite; Indosinian granite rare earth elements are obviously characterized by M-type four-grouping effect, Nb is obviously relative to Ta loss, and the source discrimination shows that it is partly from the continental crustal sedimentary rocks and continental crustal sedimentary rocks, Mantle material involved.