| 滇东南锡矿带矿床类型及其组合特征 |
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| 引用本文：.1990.Types and associations of ore deposits along the Southeasten Yunnan tin ore belt[J].Mineral Deposits,9(1):35~48 |
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| 中文摘要:本文从矿床地质特征出发，以矿床的矿石类型为基础，考虑成因，强调矿床的工业意义，将滇东南锡矿带的矿床类型划分为两类，四组合，十四型。锡矿床围绕花岗岩突呈现规律性的空间组合，同时以成矿地质条件的差异、成矿作用的多样性，形成矿床类型的不同组合形式。 |
| 中文关键词:锡矿带 矿床类型及其组合 滇东南 |
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| Types and associations of ore deposits along the Southeasten Yunnan tin ore belt |
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| Abstract:Along the Southeasten Yunnan tin ore belt genetically related to Yanshanian tectonic-magxnatic cycle, tin is closely associated with such elements as Tungsten, beryllium, bismuth, molybdenum, copper, lead, zinc and silver in time and space. With the granite as the center, the pneumato-hypothermal to mesothermal-epithermal mineralizations make up tin-polymetallic ore deposits dominated by cassiterite-sulfide type and cassiterite-quartz type ones which have been turned into placer tin deposits through denudation. The author has done his best to enable the classification of the ore deposits to reflect metallogenic factots, mineraJization features and indicator character istics which are readily recognized. Thereiore, the classiiication of ore deposit types starts from geological set ting of these ore deposits and bases it self on ore types(associations of ore deposits); in addition, it takes into account their geneses and lays emphasis on their economic significance. In this paper, a three-grade division system of class-association-type is adopted with genesis-indicator mineral association-ore-hosting geological body as the basis. The ”class” of ore deposits is determined by genesis-economic signficance, the “association” (corresponding to subtype) by indicator minerals which show both genetic significance and specific metallogenic environment, and the ”type” by indicator ore-hosting geologicaI system where a typical mineral association occurs. On the basis of these principles, the ore deposits along the Southeastern Yunnan tin ore belt are grouped into to classes, four associations and fourteen types．Different types of tin deposits occur in regular association．The primary tin ore deposits show regular ”storeyed” three-dimensional mineraIization association. The general tendency is like this from the granite body outwards, there appear cassiterite-feldspar association-cassiterite-quartz association-cassiterite sulfide association, typical metallogenic elements of Sn-W-Be-Mo-Nb-Ta-TR-Sn-W-Cu-In-Sn-Pb- Zn-As-Cd,-and pneumato-hypothermal-hypothermal-mesothermal-mesothmlreal-epithetreal ore deposits. The difference in metallogenic-geological environment(rock-forming and ore-forming effects of granite, host rocks and ore-hosting structural system)has led to the formation of different associations. |
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