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矿床地质  2007 

云南澜沧老厂矿区影像线-环结构矿床定位模式研究

Keywords: 地质学,线-环结构,色调异常,矿床定位,老厂矿床,云南

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Abstract:

文章通过对老厂地区TM影像线性构造、环形构造和蚀变信息的解译分析,综合矿床地质、地球物理和地球化学等特征,总结了老厂线-环结构的矿床定位模式。南北轴向的南老环和东西轴向的透镜体系列分别反映了华力西期火山洼地和燕山期—喜马拉雅期隐伏中酸性岩体,两者叠加形成老厂环_环横叠式结构,与隐伏岩体同期或稍后的NW向、NE向共轭线性构造带与环形构造叠加交切,多组构造的交汇点是有利的成矿部位。遥感影像上大面积的色调异常斑块显示了近矿围岩蚀变的范围。基于老厂线_环结构的矿床定位模式,预测了成矿区及近期应勘探的靶区。

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