| 云南澜沧老厂矿区影像线-环结构矿床定位模式研究 |
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| 引用本文：.2007.A linear-ring structure model for ore deposit location in Laochang ore district of Lancang County, Yunnan Province[J].Mineral Deposits,26(5):541~549 |
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| 基金项目:云南省省院省校合作项目《云南澜沧老厂银铅锌多金属矿床立体定位预测与增储研究（2003ADBEA34A025）》 |
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| 中文摘要: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。 |
| 中文关键词: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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| A linear-ring structure model for ore deposit location in Laochang ore district of Lancang County, Yunnan Province |
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| Abstract:Based on an interpretation of linear and ring structures and the extraction of alteration information from TM imagines，in combination with ore deposit geology and geochemical data，the authors formulated a linear-ring structure model for ore deposit location in the Laochang ore district. The NS axial Nanlao ring and the EW axial lenses series reflect the Variscan volcanic depressions and the Yanshanian_Himalayan concealed intermediate-acid intrusive bodies respectively, and their superimposition has formed Laochang ring-ring transverse overlapping style structure; the NW-trending and NE-trending conjugate structure belts formed contemporaneous with or a bit later than the concealed intrusive bodies have overlapped and dissected ring structures, and the intersections of various structures are places favorable for mineralization. The large tone anomaly patches indicate areas of near-ore wall rock alteration. On the basis of the linear_ring structure model for ore deposit location in Laochang, the authors have predicted the metallogenic areas and the targets for exploration work in near future. |
| keywords:geology, linear-ring structure, tone anomaly, ore deposit location, Laochang ore deposit, Yunnan Province |
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