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

doi:10.3390/min10110950

CORC > 深海科学与工程研究所 > 中国科学院深海科学与工程研究所 > 深海科学研究部 > 深海极端环境模拟研究实验室

	Tectonomagmatic Setting and Cu-Ni Mineralization Potential of the Gayahedonggou Complex, Northern Qinghai-Tibetan Plateau, China
	Norbu Namkha 1,3; Li Jinchao 4; Liu Yuegao 2; Jia Qunzi 4; Kong Huilei 4
刊名	Minerals
	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
DOI	10.3390/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.
资助项目	China Geological Survey[DD20160013] ; China Geological Survey[121201011000150005-17]
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
WOS研究方向	Mineralogy ; Mining & Mineral Processing
语种	英语
出版者	MDPI
WOS记录号	WOS:000593335700001
资助机构	China Geological Survey
内容类型	期刊论文
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.Shaanxi Provincial Land Engineering Construction Group 2.Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences 3.School of Land Engineering, Chang'an University 4.Xi'an Center of China Geological Survey
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.