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Tectonomagmatic Setting and Cu-Ni Mineralization Potential of the Gayahedonggou Complex, Northern Qinghai-Tibetan Plateau, China

文献类型：期刊论文

作者Norbu Namkha3,4; Li Jinchao2; Liu Yuegao1; Jia Qunzi2; Kong Huilei2
刊名Minerals
出版日期2020-10-25
卷号10期号:11页码:950
关键词Gayahedonggou complex U-Pb dating metallogenic model East Kunlun orogenic belt harmful crustal contamination post-collision
DOI10.3390/min10110950
英文摘要The Gayahedonggou magmatic Cu-Ni sulfide deposit was recently discovered in the East Kunlun orogenic belt (Northern Tibetan Plateau, China). The mineralization in this region is associated with mafic-ultramafic intrusions. To date, the formation age and metallogenic model of these ore-bearing intrusions have not been studied systematically. In this paper, the petrology, zircon U-Pb chronology, and geochemistry of ore-bearing wehrlite and quartz diorite are investigated. The results show that the zircon U-Pb isotopic age of wehrlite is 419.9 +/- 1.5 Ma with an average epsilon Hf(t) value of 3.0, indicating that wehrlite originated from a depleted mantle or the asthenosphere. The (La/Yb)(N), (La/Sm)(N), (Gd/Yb)(N), Nb/U, and Ce/Pb ratios of wehrlite are between 3.01-7.14, 1.69-3.91, 1.36-1.51, 2.07-2.93, and 0.55-1.42, respectively, indicating that the parent magma of the wehrlite had been contaminated by the upper crust. The zircon U-Pb isotopic age of quartz diorite is 410.2 +/- 3.5 Ma with an average epsilon Hf(t) value of 8.0, and the A/CNK and A/NK ratio of quartz diorites ranges from 1.02 to 1.04 and from 2.13 to 2.23, respectively. These features are similar to those of the type I granite, and the quartz diorite was likely derived from the lower crust. Combined with the regional geological evolution, the Gayahedonggou complex formed in a post-collision extensional environment. The pyroxene in the Gayahedonggou complex is mainly clinopyroxene, which is enriched in the CaO content, indicating that the CaO content of the parent magma of the Gayahedonggou complex is high or that the complex has been contaminated by Ca-rich surrounding rocks, which hinders Cu-Ni mineralization.
WOS关键词KUNLUN OROGENIC BELT ; MAFIC-ULTRAMAFIC COMPLEX ; U-PB GEOCHRONOLOGY ; EAST KUNLUN ; SULFIDE DEPOSIT ; HF ISOTOPES ; WESTERN CHINA ; NW CHINA ; VOLCANIC-ROCKS ; TRACE-ELEMENT
资助项目China Geological Survey[DD20160013] ; China Geological Survey[121201011000150005-17]
WOS研究方向Mineralogy ; Mining & Mineral Processing
语种英语
WOS记录号WOS:000593335700001
出版者MDPI
资助机构China Geological Survey
版本出版稿
源URL[http://ir.idsse.ac.cn/handle/183446/7913]  
专题深海科学研究部_深海极端环境模拟研究实验室
通讯作者Li Jinchao; Liu Yuegao
作者单位1.Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences
2.Xi'an Center of China Geological Survey
3.Shaanxi Provincial Land Engineering Construction Group
4.School of Land Engineering, Chang'an University
推荐引用方式
GB/T 7714		 Norbu Namkha,Li Jinchao,Liu Yuegao,et al. Tectonomagmatic Setting and Cu-Ni Mineralization Potential of the Gayahedonggou Complex, Northern Qinghai-Tibetan Plateau, China[J]. Minerals,2020,10(11):950.
APA Norbu Namkha,Li Jinchao,Liu Yuegao,Jia Qunzi,&Kong Huilei.(2020).Tectonomagmatic Setting and Cu-Ni Mineralization Potential of the Gayahedonggou Complex, Northern Qinghai-Tibetan Plateau, China.Minerals,10(11),950.
MLA Norbu Namkha,et al."Tectonomagmatic Setting and Cu-Ni Mineralization Potential of the Gayahedonggou Complex, Northern Qinghai-Tibetan Plateau, China".Minerals 10.11(2020):950.

入库方式： OAI收割

来源：深海科学与工程研究所

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