NDLI: Geology and Geochemistry Constraints on the Genesis of the No.2 Porphyry Copper-gold Deposit in the Xiongcun District, Gangdese Porphyry Copper Belt, Tibet, China

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Geology and Geochemistry Constraints on the Genesis of the No.2 Porphyry Copper-gold Deposit in the Xiongcun District, Gangdese Porphyry Copper Belt, Tibet, China

Content Provider	Semantic Scholar
Author	Yin, Qing-Zhu
Copyright Year	2017
Abstract	The Xiongcun district is located in the western segment of the Gangdese porphyry copper belt (GPCB). The No.2 deposit in the Xiongcun district hosts a measured and indicated resource of 1.34 Mt copper, 76.34 t gold, and 193.78 t silver. The copper-gold mineralization of the No.2 deposit is mainly hosted in the Early Jurassic quartz diorite porphyry which intruded volcano-sedimentary rocks of the Early Jurassic Xiongcun Formation. S and Pb isotopic compositions of the ore sulfides and Re contents of molybdenite suggest a mantle source with minor contamination of subducted sediments for the ore-forming materials. Hydrogen and oxygen isotopic compositions of quartz from the quartz – sulfide veins suggest that the ore-forming fluid was a mixture of magmatic and meteoric water. Geochemical and Sr–Nd–Hf isotopic compositions of the Early Jurassic quartz diorite porphyry suggest that the mineralization of the No.2 deposit formed in an intra-oceanic island arc setting. The magmas of the Early Jurassic quartz diorite porphyry were likely sourced from partial melting of mantle with limited contamination by subducted sediments (ca. 5%). The formation of the porphyry and the No.2 deposit were related to the northward intra-oceanic subduction of the Neo-Tethys oceanic slab during the Early
Starting Page	477
Ending Page	508
Page Count	32
File Format	PDF HTM / HTML
DOI	10.15666/aeer/1503_477508
Volume Number	15
Alternate Webpage(s)	http://epa.oszk.hu/02500/02583/00049/pdf/EPA02583_applied_ecology_2017_03_477508.pdf
Alternate Webpage(s)	http://aloki.hu/pdf/1503_477508.pdf
Alternate Webpage(s)	https://doi.org/10.15666/aeer%2F1503_477508
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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