| 云南腾冲锡矿带地质背景及锡矿类型 |
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| 引用本文：.1986.Geological Setting And Ore Types Of The Tengchong Tin Ore Belt In Yunnan Province[J].Mineral Deposits,5(3):19~26 |
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| Geological Setting And Ore Types Of The Tengchong Tin Ore Belt In Yunnan Province |
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| Abstract:Geological setting and types of tin deposits along the Tengchong tin ore belt of Yunnan Province are described in this paper. The belt lies in the south of the Yanshanian Gandise-Tanggula fold belt. The stanniferous granites were formed mainly during Yanshanian and Himalayan orogenies dated at 120-70 Ma and 60-40 Ma respectively, and might be divided into three zones. The Carboniferous Menghong Group is especially enriched in tin. Besides, the ore-controlling structure is also important in mineralization. Ore deposits along the Tengchong tin ore belt might be grouped into seven types, namely disseminated cassiterite (intrusive body) type, pegmatite type, skarn type, greisen type, quartz vein type. Porphyry polymetallic sulfide type and placer type, with the greisen type and placer type being the major commercial tin ore types. The discovery of the Tengchong tin ore belt not only furnishes new information to the northward extension of the Southeast Asia tin ore belt, but is of guiding significance in prospecting for tin deposits in northwest Yunnan and east Tibet. |
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