| 广西笼箱盖—拉么地区铜锌多金属矿床的侵入接触构造体系 |
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| 引用本文：.1988.The intrusive contact structural system of the copper-zinc polymetallic deposit in Longxianggai-lamo area, Guangxi[J].Mineral Deposits,7(1):64~75 |
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| 中文摘要:笼箱盖一拉么铜锌多金属矿床位于穹状隐伏花岗岩株顶部的岩篷的侵入接触构造
体系中。本区侵入接触构造体系可划分为六种类型：①侵入接触一断裂带构造；②叠加褶皱接触带构造；③接触热动力变质形成的揉皱构造；④多层接触一圈闭构造；⑤多期次侵入接触带构造；⑥隐伏岩株顶部的网状裂隙构造。侵入接触构造体系的形成在时间上经历了印支一燕山构造运动，在空间上主要围绕岩株顶部的南北向断裂分布，是构造、地层、岩浆岩、蚀变和矿化等多种要素的组合。笔者在此基础上建立了侵入接触构造一矿化模式图。 |
| 中文关键词:侵入接触—构造体系 叠加褶皱 接触一圈闭构造 穹状隆起区 网环状裂隙构造 |
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| The intrusive contact structural system of the copper-zinc polymetallic deposit in Longxianggai-lamo area, Guangxi |
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| Abstract:The Cu-Zn polymetallic deposit at the Longxianggai-Lamo area lies on the domelike uplift of a concealed granite stock in the middle of the Dachang ore belt(Fig.1)with mineralization occurring inside the intrusive contact strutrural system on the roof of the stock. The intrusive contact structural system might be divided into six types: 1．Intrusive contact-faulted zone structural type(Fig.2); 2．Superimposed fold contact zone structure; 3．Crumple structure formed by contact thermodynamic metamorphism ; 4．Polylayered contact—closed structure(Fig.4)； 5．Multi-stage intrusive contact zone structure; 6．Network-ringlike structure on the top of the concealed stock. In time, the intrusive contact structural system developed from Indo-Sinian to Yanshanian structural activities and had certain evolutionary sequence (Fig.7); in space, it is distributed mainly along the SN-trending fault on the roof of the stock. The dislocation of the Longxianggai SN-trending left-lateral fault which was active simultaneously with the magmatic intrusion gave birth to a turbo-shaped rotational shear structure on the west side of the fault, thus forming a branched-turbo-shaped intrusive contact structural ring(Fig.6), whichis a geologic structural system combining various geologic elements such as structures, strata, magmatic rocks, alterations and mineralizations. A model for intrusive contact structure-mineralization in this area has been formulated(Fig.8) and ore prediction is made according to the regularity of the ore-controlling intrusive contact structural system. |
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