A Further Discussion on Ore-controlling Factors and Genesis of the Dulong Sn-Zn Polymetallic Deposit in Southeast Yunnan
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摘要: 都龙锡锌多金属矿床是我国第三大锡石硫化物矿床,开展外围及深部找矿对矿山的可持续发展具有重要意义。在总结前人勘探和研究成果的基础上,结合最近开展的金石坡矿段探矿工程获得的新证据,对其控矿因素进行了梳理,提出了“花岗岩-构造-地层”多因素复合控矿的认识,即燕山晚期花岗岩浆作用是主要成矿物质和成矿能量驱动的提供者,是矿床形成的关键;构造和地层为成矿物质的运移、沉淀和富集,提供了有利的通道、空间和物理-化学环境。在此基础上,认为其主体为岩浆热液成因,并指出了外围及深部的找矿方向。Abstract: The Dulong Sn-Zn polymatallic deposit is one of the largest cassiterite sulfide deposits in China. Geological exploration around the Dulong ore district is very important for the continual development of the mining company. Based on the previous exploration and research achievements, this paper discussed ore-controlling factors. It is suggested that this deposit is controlled jointly by Yanshannian granites, the detachment fault system and the Tianpeng Formation. The Yanshanian Laojunshan granites, which seemed to be the most important factor, provided major ore-forming materials and energy; the detachment fault system was favorable for the movement and precipitation of the ore-forming fluid; the Tianpeng Formation offered the profitable physical and chemical conditions for the concentration of ore-forming materials. On such a basis, the authors hold that this deposit should mainly be of magmatic hydrothermal genesis. The ore-prospecting orientations in the area are also pointed out in this paper.
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Key words:
- ore-controlling factors /
- genesis /
- Dulong Sn-Zn polymetalic deposit /
- southeast Yunnan
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