广东乳源宝山岩体花岗岩成因以及构造环境  

Genesis and Tectonic Environments of Baoshan Pluton in Ruyuan, Guangdong

作　　者：刘启[1] 赖健清[1] 

机构地区：[1]中南大学地球科学与信息物理学院,湖南长沙410083

出　　处：《国土资源导刊》2016年第1期14-21,共8页Land & Resources Herald

摘　　要：宝山岩体所在的南岭地区关于花岗岩的研究一直是国内的热点,本文利用地球化学的方法研究了该地区花岗岩的成因和构造环境。将主量元素投入地球化学成因分类图,可以判定宝山岩体是具有S型特征的强过铝质高钾钙碱性花岗岩;根据地球化学构造判别图,分析出该区域的花岗岩为后造山期板内构造作用生成的产物;结合文献推断研究区燕山早期地壳发生"伸展—拉张"的板内活动,使得深层岩浆上涌继而发生地壳重熔。解释了本区域花岗岩的成因以及构造背景。Studies about granites in Nanling region, where the Baoshan pluton was located, have always been hot spots of China. This research investigated the genesis and the tectonic environment of granites in this region by using geochemistry. It can be judged that Baoshan pluton was strongly peraluminous high-K calc-alkaline granites with S-type characteristics when put major elements into the Geochemical genesis figure. And it suggested that the granites in this area were the products of post-orogenic inner-plate tectonics of continents, according to the tectonic discrimination diagrams of geochemistry. Reviewing literature concerned, it was inferred that it was the early Yanshanian extensional inner-plate activities that caused the deep magma upwelling and the following crust remelting. Therefore, the genesis and the tectonic evolution background of granites in thisregion were illustrated.

关 键 词：壳源花岗岩 后造山期 燕山期 南岭 宝山岩体 

分 类 号：P542[天文地球—构造地质学]