四川省会理市茨坪花岗岩体和宝鼎组花岗岩砾石的年代学特征对比研究  

Comparative Study on Chronological Characteristics of the Ciping Granite and Granitic Conglomerate of the Baoding Formation in Huili City, Sichuan Province

作　　者：梁国灏 陈晓东[2] 李佑国[2] 庞鑫 张良兵 LIANG Guohao;CHEN Xiaodong;LI Youguo;PANG Xin;ZHANG Liangbing(Design and Research Institute of Panzhihua Iron and Steel Group Mining Company,Panzhihua 617063,China;School of Earth Sciences,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]攀钢集团矿业公司设计研究院,四川攀枝花617063 [2]成都理工大学地球科学学院,四川成都610059

出　　处：《东华理工大学学报（自然科学版）》2023年第1期1-9,共9页Journal of East China University of Technology(Natural Science)

基　　金：中国地质调查局项目(G47E010024)。

摘　　要：为了研究四川省会理市茨坪花岗岩体和宝鼎组花岗岩砾石成因及来源关系,开展二者的锆石U-Pb年代研究。结果表明:茨坪花岗岩体形成时代为中三叠世,其锆石U-Pb年龄为(244.8±1.5)Ma,是印支期岩浆活动产物;宝鼎组花岗岩砾石的形成时代为晚二叠世,其锆石U-Pb年龄为(252.6±1.7)Ma,是二叠纪峨眉山地幔柱岩浆活动产物。宝鼎组花岗岩砾石可能并非来自茨坪花岗岩体。In order to study the genesis and source relationship between the Ciping granite and granitic conglomerate of the Baoding Formation in Huili city of Sichuan province, zircon U-Pb dating were carried out for both of them. The results show that, the formation age of the Ciping granite body is the Middle Triassic, and its zircon U-Pb age is(244.8±1.5) Ma, which is the product of Indosinian magmatism. The granitic conglomerate of the Baoding Formation is formed in the Late Permian, and its zircon U-Pb age is(252.6±1.7) Ma, which is the product of the Permian Emeishan mantle plume magmatism. The granitic conglomerate in the Baoding Formation is not derived from the Ciping granite.

关 键 词：年代学 茨坪花岗岩体 宝鼎组花岗岩砾石 会理市 

分 类 号：P597[天文地球—地球化学]