期刊论文

中文

南华大学学报(自然科学版)

1673-0062

2023

37

02

45-53

10.19431/j.cnki.1673-0062.2023.02.007

2023JJ30507:湖南省自然科学基金项目 22B0433:湖南省教育厅科学研究项目 202210555053:大学生创新创业训练计划项目 S202210555331:大学生创新创业训练计划项目 S202210555335:大学生创新创业训练计划项目

本校为第一机构

华南出露大量加里东期花岗岩，其岩石成因、构造背景长期存在争议。湖南省加里东期花岗岩年代学和地球化学数据显示，其主要形成于416～432 Ma之间，岩性主要为花岗岩和花岗闪长岩。岩石类型除少数为I型花岗岩外，大部分为S型花岗岩。地球化学特征为富硅、过铝质和高钾钙碱性系列花岗岩，富集Rb、Th、U等元素，亏损Ba、Nb、Sr等元素；指示岩浆源区为古-中元古代地壳物质部分熔融的产物，部分花岗岩有幔源物质的加入。区域地质背景和岩石地球化学数据指示湖南加里东期岩体形成于碰撞挤压峰期之后挤压减弱、应力松弛的后碰撞构造环境。区域内加里东期花岗岩中铀含量相对较高，为后期铀成矿提供物质...

A large number of Caledonian granites have been exposed in South China,and their petrogensis and tectonic setting have been controversial for a long time.The Chronology and geochemical data of Caledonian granite show that it was mainly formed between 416 and 432 Ma,and ...MORE A large number of Caledonian granites have been exposed in South China,and their petrogensis and tectonic setting have been controversial for a long time.The Chronology and geochemical data of Caledonian granite show that it was mainly formed between 416 and 432 Ma,and the lithology is mainly granite and granodiorite.Exc...