西北地质2013，Vol.46Issue(1)：139-153,15.
青海加当根斑岩型铜(钼)矿床岩石地球化学特征及其成因认识
Geochemistry and Genesis of Igneous Rocks in Jiadanggen Porphyry Cu(Mo) Deposit, Qinghai Province, China
摘要
Abstract
The Jiadanggen porphyry Cu(Mo) deposit lies in the east of Qimantage-Dulan sub-orogen, East Kunlun orogen, Qinghai Province. It is a newly discovered mineral deposit in recent years, and with low degree in studying. The geochemistry analysis on igneous rock samples in the Jiadanggen mining area shows that the ore bearing porphyry are characterized by high SiO2, alkali, low TiO2, CaO, and MgO, which is high-potassium calc-alkaline series. The REE are characterized by LREE enrichment, with obvious negative Eu anomalies. The trace elements are characterized by K, Rb, Ba, etc enrichment obviously; Ta, Nb, Zr, Hf, etc enrichment relatively; P, Ti, Y, Yb, etc depletion obviously. The characteristics of the REE and trace elements indicated the continental margin arc tectonic setting. Combining regional geology background and geochemistry of the igneous rocks in Jiadanggen deposit, the Jiadanggen igneous rocks may be formed in the early stage of the collision orogeny, continental margin arc and collision orogeny coexistence environment. And it was formed from dehydration of residual oceanic crust which caused mantle wedge partial melting.关键词
鄂拉山地区/斑岩铜矿/岩石地球化学/构造背景Key words
Elashan district/ porphyry copper deposit/ geochemistry of igneous rocks/ tectonic setting分类
天文与地球科学引用本文复制引用
向鹏,姚书振,周宗桂..青海加当根斑岩型铜(钼)矿床岩石地球化学特征及其成因认识[J].西北地质,2013,46(1):139-153,15.基金项目
青海省都兰-鄂拉山地区成矿条件及找矿方向研究(2008026362) （2008026362）
