| 滇中龙岗地区多金属矿带成矿地质特征及找矿方向 |
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| 引用本文：周云满，谢先柏，毛景文.2006.Metallogenic geological characteristics of Longgang polymetallic belt in c entral Yunnan [J].Mineral Deposits,25(6):743~757 |
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| 基金项目:云南地矿资源股份有限公司科研项目“云南省楚雄市龙岗金矿带成矿规律及成矿 预测” |
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| 中文摘要:文章总结了滇中龙岗地区金、铜、铁、铅_锌、银等多金属矿床的类型 和成矿规律，指出该区成矿演化有4个时期：早元古代铁_铜成矿期，中元古代-中三叠世古 风化壳铁（金）矿成矿期，燕山期-早喜马拉雅期金、铅-锌（银）成矿期，晚喜马拉雅期金 成矿期；相应地在空间上自下而上形成了4种成因类型的矿床组合：海相火山喷发-沉积-变 质铁-铜矿床，古风化壳型铁（金）矿床，构造破碎带热液蚀变脉状金矿床和铅-锌（银）矿 床，沉积-热液改造砂砾岩型金矿床。文章指出了该区找矿主攻矿种和有利找矿地段。 |
| 中文关键词:地质学 多金属矿带 成矿地质特征 找矿方向 滇中龙 岗 |
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| Metallogenic geological characteristics of Longgang polymetallic belt in c entral Yunnan |
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| Abstract:Longgang is an important area for gold, copper, iron, lead_zinc_(silver) deposits and ore spots. Since the 1970s, especially since the 1990s, a series of iron, copper, gold, and lead_zinc_(silver) deposits have been found. However, the metallogenic regularities of the area have not been studied systematically. Based on detailed researches on the metallogenic setting, geophysical and geochemical characteristics, geological characteristics of the mineralized zones, characteristics of known deposits and evolution of ore_control geological structures, the authors have classified the ore deposits and metallogenic events, and hence hold that there exist four metallogenic stages in this area, namely, Early Proterozoic iron and copper ore_forming stage, Middle Proterozoic-Middle Triassic secondary enrichment type iron (gold) ore-forming stage, Yanshanian-Early Himalayan gold and lead-zinc-(silver) ore-forming stage, and Late Himalayan gold ore-forming stage. Correspondingly, a sequence of four metallogenic deposit styles has been formulated from the lower to the upper crust, composed of marine volcanic eruption-sedimentation-metamorphosed iron-copper deposits, paleo-weathering profile type iron-(gold) deposits, vein type gold deposits and lead-zinc-(silver) deposits in thermally altered fracture zones, sedimentation-thermally altered conglomerate type gold deposits. The temporal and spatial evolution of the deposits shows four generations and four metallogenic types of deposits, and hence substantial mineral resources must exist in the same area. Key mineral resources and potential targets for ore prospecting in the area are pointed out in this paper. All this provides a good guide for future mineral exploration. |
| keywords:geology, polymetallic belt, geological characteristics of mineralization, prospecting, Longgang area in central Yunnan |
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