气候变化领域集成服务门户(CCPortal): Subduction-related Late Triassic Luerma porphyry copper deposit, western Gangdese, Tibet, China: Evidence from geology, geochemistry, and geochronology

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DOI	10.1016/j.oregeorev.2022.105253
	Subduction-related Late Triassic Luerma porphyry copper deposit, western Gangdese, Tibet, China: Evidence from geology, geochemistry, and geochronology
	Liu, Hong; Huang, Hanxiao; Li, Guangming; Li, Wenchang; Zhang, Linkui; Lan, Shuangshuang; Lue, Menghong; Song, Wenjie
发表日期	2023
ISSN	0169-1368
EISSN	1872-7360
卷号	154
英文摘要	Due to the difference of lithospheric structure between the eastern and western segment of Gangdese metal-logenic belt, it is generally believed that porphyry copper deposits are mainly developed in the east. However, the newly discovered of Luerma porphyry copper deposit in the western segment of Gangdese provides an excellent research object for us to supplement this understanding. The molybdenite re-Os isotope dating of two samples from quartz veinlet ores (ca. 213.1 +/- 5.2 Ma and ca. 212.0 +/- 3.7 Ma), combined with the LA-ICP-MS zircon U-Pb dating of three ore-bearing quartz monzonite porphyry samples (ca. 212.7 +/- 0.9 Ma, 213.1 +/- 1.1 Ma, and ca. 211.8 +/- 1.8 Ma), indicates a new generation of Late Triassic Luerma copper porphyry-type mineralization events in the western Gangdese magmatic belt. The Luerma porphyry is a strongly per-aluminous shoshonite series rock, is rich in silicon total alkalis, potassium and aluminum, has low contents of calcium, magnesium, and iron. It is enriched in light rare earth elements and large ion lithophile elements, relatively depleted in heavy rare earth elements and high field strength elements, and has negative Eu anomalies and no Ce anomalies. The porphyry exhibits relatively low (87Sr/86Sr)i values (0.705617 on average), high epsilon Nd(t) values (0.63 on average), high epsilon Hf(t) values (11.98 on average), and young two-stage Hf model ages. The Luerma ore-related porphyries are most likely generated dominantly from partial melting of juvenile crust that formed by metasomatized mantle during the subduction of the NeoTethys Ocean to the Lhasa terrane and underwent crystal fractionation during the process. The deposit is currently the oldest and westernmost porphyry deposit in the Gangdese porphyry copper belt, providing evidence that porphyry copper mineralization in this belt began in at least the Late Triassic.
关键词	Southern Lhasa subterrane Yarlung-Tsangpo neoTethyan ocean Daggyai Co Subduction
英文关键词	ZIRCON U-PB; SOUTHERN LHASA SUBTERRANE; JURASSIC VOLCANIC-ROCKS; IN-SITU ANALYSIS; RE-OS AGES; SR-ND-PB; CU-MO; XIONGCUN DISTRICT; HF ISOTOPE; TETHYAN HIMALAYA
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
WOS记录号	WOS:000963539300001
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/283492
作者单位	China Geological Survey; Chengdu Center, China Geological Survey; Chengdu University of Technology; China Earthquake Administration; Institute of Disaster Prevention, CEA
推荐引用方式 GB/T 7714	Liu, Hong,Huang, Hanxiao,Li, Guangming,et al. Subduction-related Late Triassic Luerma porphyry copper deposit, western Gangdese, Tibet, China: Evidence from geology, geochemistry, and geochronology[J],2023,154.
APA	Liu, Hong.,Huang, Hanxiao.,Li, Guangming.,Li, Wenchang.,Zhang, Linkui.,...&Song, Wenjie.(2023).Subduction-related Late Triassic Luerma porphyry copper deposit, western Gangdese, Tibet, China: Evidence from geology, geochemistry, and geochronology.ORE GEOLOGY REVIEWS,154.
MLA	Liu, Hong,et al."Subduction-related Late Triassic Luerma porphyry copper deposit, western Gangdese, Tibet, China: Evidence from geology, geochemistry, and geochronology".ORE GEOLOGY REVIEWS 154(2023).