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个旧高松矿田芦塘坝矿段矿床地球化学及成矿预测
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摘要
本文从基础地质研究入手,通过宏观和微观资料的分析研究,认为芦塘坝矿段矿床为热水喷流沉积、热液叠加改造型矿床。借助计算机技术,利用多元统计方法,结合矿床控矿特征,对矿段构造地球化学特征进行了研究。在对矿床成因的探讨、控矿因素的认识和构造地球化学异常研究的基础上,进行了成矿预测。主要获得了以下成果:
     1、通过对矿区矿床地质特征及地球化学特征的研究,探讨了矿床成矿物质来源,认为芦塘坝矿段矿床成因类型属印支中晚期海底喷流热水—沉积及燕山期花岗岩岩浆热液叠加改造成因。成矿作用经历了多期、多阶段,为多成因复合成矿矿床
     2、通过对矿段内芦塘坝断裂东、西两边两种类型矿床赋存状态、矿石结构、构造特征,元素共生组合特征的对比研究,认为芦塘坝矿段的脉状矿为层状矿受后期岩浆热液叠加改造而致。
     3、对矿床地表及不同中段进行了构造地球化学多元素组合分析数据处理,利用R型因子分析方法,以成矿元素组合因子得分的空间分布特征代表矿区矿化异常的空间变化特征,从而研究矿区构造地球化学特征。
     4、在综合矿床成因、矿床地质特征、地球化学特征及构造地球化学异常的基础上,总结成矿预测标志,优选了4个有利成矿靶区,分析了各自的找矿前景。
Based on the research on the fundamental geology and the analysis of the macroscopical and microcosmic geological investigative information, the paper has drawn a conclusion that Lutangba oreblock belongs to the exhalative hydrothermal sedmentary deposit reformed by subsequent pneumatoly-hydrothermal superimposition and studied the tectono-geochemical features with the help of computers, multivariate statistical analysis and ore-controlling characteristics of the deposit. Through systematic study on the deposit genesis, ore-controlling factors and tectono-chemistry features, metallogenic prognosis has been done. Some conclusions can be drawn as follows:
     No1. Through the research on the deposit geological and geochemical characteristics , the author has discussed the metallogenic sources and identified the cause of formation of the Lutangba oreblock as the seabed exhalative hydrothermal sedimentary mineralization of the medium-later Indo-Chinese epoch and the granitic superimposed mineralization of the late Yanshanian epoch. The deposit has many mineralization stages and periods. It is a poly and compound genesis deposit.
     No.2. Through the systematic contrast study of the ore bearing, ore structure, tectonic and element intergrowth combination characteristics of the two types of deposits located in the both sides of Lutangba fault, the author think that the vein deposit was from stratiform deposit formed by the granitic superimposed mineralization.
     NO.3. The author has analyzed the multi-element intergrowth combination characteristics from the surface of the ore district and different levels based on the tectono-chemistry. By means of R type factor analysis, the tectono-chemistry.characteristics of the ore district has been studied through the research on the spatial change of mineralization abnormality in the ore district.
     NO. 4. On the basis of the systematic study on genesis, geological characteristic, geochemistry and tectono-chemistry, the author has put forward several metallogenic prognosis signs and the four prospecting perspective areas are pointed out and analyzed respectively for prospecting.
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