Geochemical Characteristics of Harizha Granite Diorite-Porphyry in East Kunlun and Their Geological Implications
详细信息
- 责任者：Song Zhongbao (Xi’an Institute of Geology and Mineral Resources ; CGS ; Xi’an 710054 ; China) ; Zhang Yulian
- 刊名：Mineral Deposits
- 出版年：2013
- 卷期：32(1)
- 关键词：花岗闪长斑岩 ; granodiorite porphyry ; 铀—铅计时 ; U-Pb dating ; 斑岩铜矿床 ; porphyry copper deposit ; 斑岩钼矿床 ; porphyry molybdenum deposit ; 昆仑山 ; Kunlun Mountains
- 页码：p.157-168
- 图表：illus., 3 tables, 36 refs.
- 分类号：1001
- issnNo：ISSN0258-7106
- isbnNo：CN11-1965/P
摘要
The Harizha Cu-Mo poly-metallic deposit is one of the typical large-size porphyry deposits in the eastern Kunlun metallogenic belt,with the LA-ICP-MS U-Pb age of its mother rock granite diorite-porphyry being(234.5±4.8) Ma(MSWD=0.24).Detailed petrographic and geochemical studies show that the granite diorite-porphyry in Harizha belongs to high-K calc-alkaline series,rich in SiO2(70.94%~76.08%) and K2O(4.91%~6.07%),and poor in CaO(0.16%~2.01%) and Na2O(0.24%~0.78%).The granite diorite-porphyry is characterized by total content of ∑REE varying greatly from 124.69×10-6 to 178.68×10-6,rich in LREE and low HREE,with δEu values from 0.26~0.30.Trace elements show enrichment of LILE such as Rb,U,La and Nd and depletion of HFSE like Ba,Sr,Nb and Y.Granite diorite-porphyry resulted from the syn-collisional tectonic setting.
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