File(s) under permanent embargo
The Pulang Porphyry Copper Deposit and Associated Felsic Intrusions in Yunnan Province, Southwest China
journal contribution
posted on 2023-05-17, 09:34 authored by Li, W, Zeng, P, Hou, Z, Noel WhiteNoel WhiteThe Pulang porphyry copper deposit recently discovered in northwestern Yunnan province, China, is located at the south end of the Triassic Yidun island arc. To date, 15 mineralized porphyry deposits have been defined in the Pulang area and the copper resource is estimated to exceed 10 Mt. The Pulang deposit, as currently defined, is made up of five ore-bearing porphyry deposits, covering an area of approximately 9 km2. Intermediate acidic porphyritic intrusions composed of quartz-diorite, monzodiorite, quartz-monzonite, and granodiorite are widespread in the Pulang area. The alteration zones identified with the porphyry deposits include silicic, potassium silicate, quartz-sericite, and propylitic zones. The porphyry deposits have hornfels at the contact with slate, sandstone, and andesite. Re-Os ages of molybdenite, and Ar/Ar and K-Ar dating of biotite indicate that the Pulang porphyry copper deposit formed during the Indosinian tectonic episode, with the main ore formation taking place from 216 to 213 Ma (Late Triassic, Norian); however, the whole process of hydrothermal activity, including overprinting, may have extended from 235 to 182.5 Ma.
History
Publication title
Economic Geology and The Bulletin of The Society of Economic GeologistsVolume
106Pagination
79-92ISSN
0361-0128Department/School
School of Natural SciencesPublisher
Economic Geology Publ CoPlace of publication
5808 South Rapp St, Ste 209, Littleton, USA, Co, 80120-1942Rights statement
© 2011 Society of Economic Geologists, Inc. Society of Economic Geologists, 7811 Shaffer Parkway, Littleton, CO 80127, USARepository Status
- Restricted