河北石湖金矿床控矿构造特征及矿体定位机制研究——以101脉为例

发布时间：2018-06-29 14:42

本文选题：断裂构造 + 控矿部位　；参考：《大地构造与成矿学》2017年04期

【摘要】：石湖金矿床位于太行山中北段,矿床产出严格受断裂构造控制。在详细野外观察及室内综合研究基础上,结合矿山生产地质资料的二次开发,认为石湖金矿控矿构造是在前中生代近SN向和NW向剪节理基础上,经燕山期构造追踪、叠加、复合而成。在主成矿期NNW-SSE向左行走滑应力作用下,石湖金矿区101脉控矿构造NW向部位以早期充填的石英闪长玢岩脉顶底板为薄弱面相对扩容,相应地矿床围岩蚀变带变宽、矿化强度高、矿化类型以石英脉型为主,形成局部"富矿柱";而近SN向部位则相对空间压缩,相应地围岩蚀变带变窄、矿化强度低、矿化类型以蚀变岩型为主,不利于成矿;富矿柱以高角度(约70°)侧列式分布,各富矿柱联合形成总体以40°向南侧伏的假象。根据该构造控矿规律,预测石湖金矿101脉47~61勘探线间、标高150 m以下部位为有利成矿部位,该成果已为矿山生产所证实。
[Abstract]:Shihu gold deposit is located in the north of Taihang Mountain and its occurrence is strictly controlled by fault structure. On the basis of detailed field observation and laboratory comprehensive study, combined with the secondary development of mine production geological data, it is considered that the ore-controlling structure of Shihu gold deposit is based on the near SN and NW shear joints of the pre-Mesozoic, followed and superimposed by the Yanshanian tectonics. Compound. Under the action of NNW-SSE to left strike-slip stress during the main metallogenic period, the NW direction of the 101 vein controlling structure in Shihu gold deposit area is relatively enlarged with the early filling quartz diorite-porphyrite vein top and bottom plate as the weak surface, corresponding to which the alteration zone of the surrounding rock of the deposit becomes wider and the mineralization intensity is high. The mineralization type is mainly quartz vein type, forming local "rich ore column", while near SN direction is relatively space compression, corresponding wall rock alteration zone becomes narrow, mineralization intensity is low, and mineralization type is mainly altered rock type, which is not conducive to mineralization. The rich ore columns are distributed at high angles (about 70 掳), and all the rich pillars form the illusion that the south side of the ore-rich pillars is 40 掳in total. According to the rules of structural ore-control, it is predicted that between the exploration lines of Shihu gold deposit 101 vein 47jiu61, where the elevation below 150 m is favorable, the result has been proved by mine production.
【作者单位】：东北大学资源与土木工程学院;中国黄金集团石湖矿业有限公司;
【基金】：国家自然科学基金(U1602232) 中央高校基本科研业务费专项基金(N090401010)联合资助
【分类号】：P618.51

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