地质通报2017，Vol.36Issue(7)：1231-1241,11.
滇西南澜沧江带红豆山铜矿花岗斑岩地质地球化学特征及成岩时代
Geological and geochemical characteristics and age of gran?ite porphyry in the Hongdoushan copper deposit, South Langcangjiang belt, western Yunnan Province
摘要
Abstract
The Hongdoushan granite porphyry in the South Langcangjiang volcanic arc zone is a peraluminous and shoshonite S-type granitoid. The granite porphyry contains 71.1%~74.4% of SiO2, high total alkalis (K2O+Na2O=8.4%~9.4%), high K and high A/CNK of 1.06~1.21, and is characterized by enrichment of light rare earth elements with negative europium anomalies (δEu=0.53~0.74), relative enrichment of large ion lithophile elements (LILE) such as Rb, Ba, Th and U, and relative depletion of Sr, P and Ti. Geochemical features indicate that the Hongdoushan granite porphyry has characteristics of volcanic arc granite and syn-collision granite, and is epicontinental arc-volcanic rock. LA-ICP-MS zircon U-Pb dating age of the Hongdoushan granite porphyry is 220.3±3.6Ma, indicating that the rock was formed during Late Triassic. Geochemical features and formation age of the Hongdoushan granite porphyry is very similar to features of basic volcanic rock of Xiaodingxi Formation, which suggests that they are products of different stages of the same magmation.关键词
南澜沧江带/花岗斑岩/LA-ICP-MS锆石U-Pb年龄/地球化学/小定西组Key words
South Langcang belt/granite porphyry/LA-ICP-MS zircon U-Pb age/geochemistry/Xiaodingxi Formation分类
天文与地球科学引用本文复制引用
王磊,王加昇,王雷,郭泽华,韩润生,刘飞,崔峻豪..滇西南澜沧江带红豆山铜矿花岗斑岩地质地球化学特征及成岩时代[J].地质通报,2017,36(7):1231-1241,11.基金项目
云南省应用基础研究计划项目《滇西云县红豆山铜矿床流体地球化学和成矿年代学研究》(编号:201401CD00230)、云南省矿产资源预测评价工程实验室及省、校创新团队项目 （编号:201401CD00230）
