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DOI	10.1016/j.oregeorev.2023.105611
	Low-temperature thermochronology of the Longmala - Mengya'a Pb-Zn deposits (southern Tibet): Implications for ore exhumation and preservation
	He, Zhiyuan; Zhong, Linglin; Su, Wenbo; Zhong, Kanghui; Glorie, Stijn; Ren, Fei; Shen, Xiaoming; Song, Shida; Dou, Jie; Qin, Qin; De Grave, Johan
发表日期	2023
ISSN	0169-1368
EISSN	1872-7360
卷号	160
英文摘要	The large Gangdese metallogenic belt, located in the southern part of the Tibetan Plateau, hosts a variety of magmatic-hydrothermal ore deposits. Previous works in the area primarily concerned the ore genesis, while the exhumation history of these ore deposit has received less attention. In this contribution we explore the multistage thermo-tectonic evolution of the Longmala and Mengya'a Pb-Zn deposits, two large magmatichydrothermal ore deposits in the central Lhasa sub-terrane. In more detail, the thermal history of granitoids and deformed Paleozoic sediments inside and on the periphery of the ore districts have been constrained by lowtemperature thermochronological methods, including the zircon (U-Th)/He and apatite fission track thermochronology. Additionally, zircon U-Pb geochronology was conducted on granitic host rocks to determine their emplacement ages. Our thermochronological data and inverse thermal history modeling results reflect two phases of accelerated basement cooling during the Cenozoic (i.e., -46-41 Ma and -20-5 Ma), interpreted as exhumation phases. The ore body was exhumed to the near surface during the Miocene, which provides essential information for ore exploration in the region. We also explore the degrees of basement rock exhumation along the Gangdese metallogenic belt and their spatio-temporal relations to major ore deposit distributions. It is suggested that complex interactions between tectonic-structural activities and surface erosion occurred during the late Oligocene-Miocene (-25-5 Ma), which resulting in widespread exhumation along the Gangdese batholith. During this period, the ore-bearing rocks were gradually (with medium to high cooling rates) exhumed to the near-surface from -3-4 km crustal depth, making these ore deposits feasible for commercial mining.
关键词	Low -temperature thermochronology Longmala and Mengya'a Pb-Zn deposits Exhumation and preservation Gangdese metallogenic belt Southern Tibet
英文关键词	PORPHYRY COPPER-DEPOSIT; INDIA-ASIA COLLISION; EAST-WEST EXTENSION; APATITE (U-TH)/HE THERMOCHRONOMETRY; MAGMATIC-HYDROTHERMAL EVOLUTION; FISSION-TRACK; U-PB; LHASA TERRANE; GANGDESE BATHOLITH; TECTONIC EVOLUTION
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
WOS记录号	WOS:001094533500001
来源期刊	ORE GEOLOGY REVIEWS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283209
作者单位	Chengdu University of Technology; Ghent University; University of Adelaide; China Geological Survey; Chengdu Center, China Geological Survey; Northwest University Xi'an
推荐引用方式 GB/T 7714	He, Zhiyuan,Zhong, Linglin,Su, Wenbo,et al. Low-temperature thermochronology of the Longmala - Mengya'a Pb-Zn deposits (southern Tibet): Implications for ore exhumation and preservation[J],2023,160.
APA	He, Zhiyuan.,Zhong, Linglin.,Su, Wenbo.,Zhong, Kanghui.,Glorie, Stijn.,...&De Grave, Johan.(2023).Low-temperature thermochronology of the Longmala - Mengya'a Pb-Zn deposits (southern Tibet): Implications for ore exhumation and preservation.ORE GEOLOGY REVIEWS,160.
MLA	He, Zhiyuan,et al."Low-temperature thermochronology of the Longmala - Mengya'a Pb-Zn deposits (southern Tibet): Implications for ore exhumation and preservation".ORE GEOLOGY REVIEWS 160(2023).