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滇东南地区金矿区域成矿条件及成矿模式
REGIONAL METALLOGENIC CONDITIONS AND PROSPECTING DIRECTIONS OF GOLD DEPOSITS IN SOUTHEASTERN YUNNAN
【摘要】 在成矿构造环境研究基础上,指出滇东南晚古生代-中生代沉积盆地属裂陷构造盆地性质。该裂陷构造盆地是本区金矿赋存的重要空间,也是它们的成矿场所。本区存在多个金的高背景层位,金矿成矿受地层、岩性、构造变形作用、岩浆作用等因素的综合控制,这些因素在不同区段、不同时段的耦合梯度差是造成本区金矿成矿与否的关键条件。基于成矿控制因素的综合分析,建立了区域成矿模式,强调只有耦合梯度高的区段才可能有金的工业矿体出现,并进一步讨论了本区金矿的找矿方向。
【Abstract】 Based on the study of metallotect environment,it is pointed that the southeastern Yunnan Basin of late Palaeozoic- Mesozoic era belongs to a taphrogeosyncline basin.The basin is not only a gold ore- hosted space,but also a metallogenic locus.There are many horizons with high gold- bearing content in the area.Metallogensis of gold deposits are controlled by stratum,rock type,and structural deformation as well as magmatism.The coupling gradient of these gold ore- controlling factors is a key condition that gold deposits are formed,or not.According to the above analyses,the authors have established a regional metallogenic model for gold deposits,and emphasized that industral gold bodies can form only under sectors of high couplied gradient of gold ore- controlling factors. Meanwhile,the prospecting directions of gold deposits are discussed.
【Key words】 Metallogenic condition; prospecting directions; gold deposit; southeastern Yunnan;
- 【文献出处】 大地构造与成矿学 ,GEOTECTONICA ET METALLOGENIA , 编辑部邮箱 ,2000年S1期
- 【分类号】P611
- 【被引频次】19
- 【下载频次】333