Tinggong (Tingguan) Cu-Mo deposit, Nyêmo (Nimu) Co., Lhasa Prefecture, Tibet Autonomous Region, China

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厅宫铜钼矿床, 尼木县 (སྙེ་མོ་རྫོང་), 拉萨市 (ལྷ་ས་གྲོང་ཁྱེར་), 西藏自治区, 中国

Supergene porphyry copper-molybdenum deposit, hosted in a quartz monzonite porphyry which intruded hornfelsed clastic rocks. The porphyry is highly faulted and is intruded by dacite and andesite porphyry dykes and rare lamprophyres. It shows relict potassic alteration, which is overprinted by weak to strong phyllic-argillic alteration, particularly close to major faults, and grades downwards to a propylitic alteration assemblage. In contrast, the dacite exhibits strong sericitic to chloritic alteration, whereas the andesite is mainly propylitic.

References

- Qu, X., Hou, Z., and Huang, W. (2001): Is Gangdese porphyry copper deposit belt the second Yulong copper deposit belt ? Mineral Deposits 20(4), 353-366 (in Chinese with English abstract).
- Xiaochun Wang, Zigui Yan, Weide Zhou, Xiangkan Jia, Zuohua Li, Jun Wen, Dezhang Xu, and Jianfei Yuan (2002): Preliminary study on geological features of porphyry-type copper deposits in the northwestern Nimu, middle section of Gangdisi belt, Tibet. Geology and Prospecting 38(1), 5-8.
- Rui, Z., Wang, L., and Wang, Y. (2002): Porphyry copper deposit models in China: Workshop on Assessing Undiscovered Mineral Resources, June 24-28, Beijing, China, China Geological Survey and U.S. Geological Survey, p. 42-52.
- Gao, Y., Hou, Z., Wei, R., and Zhao, R. (2003): Post-collisional adakitic porphyries in Tibet: geochemical and Sr-Nd-Pb isotopic constraints on partial melting of oceanic lithosphere and crust-mantle interaction: Acta Geologica Sinica 77(2), 194-203.
- Hou, Z., Mo, X., Gao, Y., Qu, X., and Meng, X. (2003): Adakite, a possible host rock for porphyry copper deposits: Case studies of porphyry copper belts in Tibetan Plateau and in Northern Chile. Mineral Deposits 22(1), 1-12 (in Chinese with English abstract).
- Guang-Ming Li, Bo Liu, Wen-Jun Qu, Fang-Cheng Lin, Hong-Quan She, and Chen-You Feng (2005): The Porphyry-Skarn Ore-Forming System in Gangdese Metallogenic Belt, Southern Xizang: Evidence from Molybdenite Re-Os Age of Porphyry-Type Copper Deposits and Skarn-Type Copper Polymetallic Deposits. Geotectonica et Metallogenia [Dadi Gouzao Yu Chengkuangxue] 29(4), 482-490.
- Qu Xiaoming, Zengqian Hou, Khin Zaw, and Li Youguo (2007): Characteristics and genesis of Gangdese porphyry copper deposits in the southern Tibetan Plateau: Preliminary geochemical and geochronological results. Ore Geology Reviews 31(1-4), 205-223.
- Singer, D.A., Berger, V.I., and Moring, B.C. (2008): Porphyry copper deposits of the world: Database and grade and tonnage models, 2008. US Geological Survey Open-File Report 2008-1155.
- Zengqian Hou, Zhiming Yang, Xiaoming Qu, Xianjin Meng, Zhenqing Li, Beaudoin, G., Zongyao Rui, and Yongfeng Gao (2009): The Miocene Gangdese porphyry copper belt generated during post-collisional extension in the Tibetan orogen. Ore Geology Reviews (in press). DOI 10.1016/j.oregeorev.2008.09.006.

External Links

http://www.ccgoldfields.com/admin/Latest/Docs/News%20release%20Nimu%209%20October%202006.pdf

http://www.ccgoldfields.com/admin/Latest/Docs/Tinggong%20first%20results%2029%20May%202007%20final.pdf

Mineral List

'Albite-Anorthite Series' Azurite Biotite Bornite Chalcocite Chalcopyrite

'Chlorite Group' Covellite Galena Goethite Hematite Kaolinite

'K Feldspar' Limonite Magnetite Malachite Molybdenite Molybdite

Muscovite var: Sericite Pyrite Quartz

21 entries listed. 15 valid minerals.