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Maodeng Cu-Sn deposit (Modon Cu-Sn deposit), West Ujimqin Banner (Xiwuzhumuqin Co.), Xilin Gol League (Xilinguole Prefecture), Inner Mongolia Autonomous Region, China

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Name(s) in local language(s): 毛登铜錫矿床, 西乌珠穆沁旗, 锡林郭勒盟, 内蒙古自治区, 中国
Cassiterite-sulfide-silicate veins and stockworks, occurring in the western contact zone of the Alubaogeshan granite porphyry (Rb-Sr isotopic age: 149 Ma). The deposit is hosted in a Jurassic bimodal volcanic sequence, including a lower basalt and upper rhyolite unit, in the Maodeng volcanic basin. The ores occur in veins that are controlled by a NW-trending fault system. The minerals exhibit idiomorphic to hypidiomorphic granular textures and occur as metasomatic fillings, disseminations, masses, veins, veinlets, stockworks and brecciae. Alteration exhibited by the magnetite, cassiterite and sulphide bodies is potassic silicification, greisenization and silicification, respectively. The deposit is interpreted as having forming in hydrothermal conditions at a moderate depth of 1.6 to 2 km, and at moderate temperatures of 450°C to 200°C.

Mineral List

23 entries listed. 18 valid minerals.

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Ke Lin (1984): Geological characteristics and prospecting directions of tin mineralizations in the Maodeng-Meng'entaolegai area of eastern Inner Mongolia. Geology and Prospecting 20(9), 17-24 (in Chinese).

Jianzhong Feng (1992): The isotopic characteristics of polymetallic deposits from Huanggangliang to Meng'entaolegai, eastern Inner Mongolia. Liaoning Geology 6(2), 117-126.

Yuqiang Liu (1996): Geology and origin of the Maodeng tin-copper deposit, Inner Mongolia. Mineral Deposits 15(2).

Mei Zhang, Yusheng Zhai, Cunli Shen, Yonghui Liu, Shuaishi Yang, Degao Zhai, Meijuan Yao, Jianping Wang, Shouguang Wang, Zhengxi Gao, and Ling Zhang (2011): Metallogenic system of copper-polymetallic deposits in the middle-southern part of Da Hinggan mountains, China. Geoscience 25(5), 819-831 (in Chinese with English abstract).

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