华南地质与矿产Issue(2)：88-98,11.DOI:10.3969/j.issn.1007-3701.2014.02.002
桂东大瑶山宝山斑岩铜矿床花岗斑岩地球化学特征及其与成矿的关系
Geochemical characteristics of granite porphyry and its rela-tionship with mineralization in Baoshan porphyry copper deposit, Dayashan, Eastern Guangxi
摘要
Abstract
The Baoshan copper deposit is a porphyry-type Cu deposit newly discovered in the Dayaoshan region in recent years, and the relationship between the concealed granite porphyry and mineralization is a controversial. In this paper, we present the geochemical characteristics of granite porphyry and copper ore in the Baoshan Cu deposit, including the major and trace elements study. The granite porphyry exhibits high SiO2 (73.94% ~77.92%), high K2O+Na2O (3.96%~8.51%), high Al2O3 (12.27%~13.65%) and low CaO (0.07%~1.49%), and belong chemically to high-potassium calc-alkaline and show the weak peraluminous to peraluminous. More-over, the granite porphyry is enriched in Rb and some high field strength elements (HFSEs), such as Ta, Nd, Sm, U, and Th, and depleted in Ba, Sr and Nb, Zr and Eu, is a typical low- Ba-Sr granites. Normalized REE patterns of the granite porphyry and copper ore is basically consistence, with a strong negative Eu anomaly, no significant Ce anomalies, little LREE and HREE fractionation. These characteristics suggest that the porphyry copper miner-alization have a closely relationship with the granite porphyry.关键词
花岗斑岩/地球化学/成岩成矿作用/宝山斑岩铜矿床/大瑶山Key words
granite porphyry/diagenesis and mineralization/Baoshan porphyry-type Cu deposit/Dayaoshan分类
天文与地球科学引用本文复制引用
李巍,韦有福,廖开立,杨振..桂东大瑶山宝山斑岩铜矿床花岗斑岩地球化学特征及其与成矿的关系[J].华南地质与矿产,2014,(2):88-98,11.基金项目
广西壮族自治区地质矿产开发局科研项目(2012026193) （2012026193）
