河北地质大学学报2025，Vol.48Issue(4)：12-19,8.DOI:10.13937/j.cnki.hbdzdxxb.2025.04.002
内蒙古宝音图一带中元古代A型花岗岩特征及形成环境
The Characteristics and Formation Environment of Mesoproterozoic A-type Granite in Baoyintu,Inner Mongolia
摘要
Abstract
The Baoyintu Proterozoic A-type granites are located in the Baoyintu-Qiandamen area.In this paper,it is considered that the monzogranite is rich in silicon(SiO2 content of 75.7%～78.6%)and poor in calcium(CaO content of 0.27%～1.06%),and is rich in Nb,Y,Zr,low Al,Mg,Ca,Ni,Cr,Ti,and has a strong negative Eu anomaly,which is obviously different from the highly differentiated I-type S-type granites,and is consistent with the characteristics of A1-type granites.Combining the regional geological background,it is considered that the monzogranite formed in an intraplate environment.The material of the granites is the upper mantle.It's formed in rift environment of the North Chinamarginmiddle Proterozoic rift,which the material source is relatively deep.The material of granite are mantle source or crust-mantle mixed source.关键词
A型花岗岩/宝音图/中元古代Key words
A-type granite/Baoyintu/Middle Proterozoic分类
天文与地球科学引用本文复制引用
倪克庆,高通,高雄,李丰..内蒙古宝音图一带中元古代A型花岗岩特征及形成环境[J].河北地质大学学报,2025,48(4):12-19,8.基金项目
河北省自然资源厅矿产普查项目(13000023P00F2D410332N,13000025P00F2D410671B) （13000023P00F2D410332N,13000025P00F2D410671B）
中国地质调查局项目(1212011120708) （1212011120708）
