Geochemistry and Genesis of Igneous Rocks in Jiadanggen Porphyry Cu (Mo) Deposit, Qinghai Province, China
详细信息
- 责任者：Xiang Peng (Faculty of Earth Resources ; China University of Geosciences ; Wuhan 430074 ; China) ; Yao Shuzhen
- 刊名：Northwestern Geology
- 出版年：2013
- 卷期：46(1)
- 关键词：斑岩铜矿床 ; porphyry copper deposit ; 斑岩钼矿床 ; porphyry molybdenum deposit ; 青海 ; Qinghai Province
- 页码：p.139-153
- 图表：illus., 4 tables, 36 refs.
- 分类号：1001
- issnNo：ISSN1009-6248
- isbnNo：CN61-1149/P
摘要
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.
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