【作者】 刘登锋；

【导师】 司荣军；

【作者基本信息】 河南理工大学 ， 地质资源与地质工程， 2010， 硕士

【摘要】 铜石地区位于沂沭断裂带西侧的鲁西隆起区,结晶基底由新太古界泰山岩群变质岩及太古代—早元古代花岗岩组成;盖层主要为古生代寒武系和奥陶系碳酸盐岩;燕山期闪长质—二长质多期侵入形成了铜石杂岩体,铜石杂岩体控制了区域金矿床的分布。区内金矿化类型主要有隐爆角砾岩型、碳酸盐岩层状微细浸染型、斑岩型、石英脉型、矽卡岩型等,该地区是上世纪末发现的新的金矿成矿区,具有良好的成矿前景。为缩小找矿靶区,提高找矿效率,降低找矿投资风险,特开展铜石地区金矿成矿预测研究。本次预测首先对研究区地质、物探、化探等资料进行分析研究,建立成矿模式;然后运用相似类比理论、地幔柱成矿理论等进行成矿预测,圈定预测靶区,最后到野外实施采样验证。预测依据为:①寒武系、奥陶系碳酸盐岩与成矿岩体的接触带;②与成矿岩体有关的多组断裂的交汇部位;③成矿岩体边部的侵入角砾岩或隐爆角砾岩筒;④重力异常、磁异常过渡带;⑤地球化学异常区,特别是多元素组合异常区。根据预测依据圈定了归来庄—曾家庄、磨坊沟—营子洼、大平安庄—上毛峪共3个找矿靶区,预测了靶区成矿深度,在圈定的靶区内新发现了具有进一步勘查价值的大平安庄、毛峪金矿点。更多还原

【Abstract】 Tongshi area is located in the West Shandong Rise, which is in the west-side of Yimu fault zone. Crystalline basement is composed of the new Archean Taishan Group metamorphic rocks and Archean-Early Proterozoic granite; cap-rocks are mainly constituted by Palaeozoic Cambrian and Ordovician carbonate rocks. Yanshanian dioritic-monzonitic multi-phase intrusion forms the Tongshi complex, which controlled the distribution of gold deposits in this area. The mineralization types in the area are mainly crytoexplosive breccia, carbonate rock-like micro-disseminated, porphyritic, quartz vein, skam and so on. The gold deposit in this area is undiscovered in last century, and it has good prospects for mineralization. In order to reduce the prospecting target areas, improve exploration efficiency and cut down investment risk of prospecting, prediction of gold mineralization was performed in Tongshi area.Firstly, this prediction collects geological, geophysical, geochemical and remote sensing data to analyze, establish ore-forming models. Applying the theory of similar analogy prediction, mantle mineralization. preliminarily delineate target area. Finally, sampling was implemented in the field.Projections are based on:①The contact zone of Cambrian, Ordovician carbonate rocks and mineralized intrusion;②Groups of faults related to mineralized intrusion;③The intrusive breccia or hidden explosive breccia pipe at the edge mineralized intrusion;④Gravity and magnetic anomaly transition zone;⑤Geochemical anomaly areas, particular combination of multi-element anomalies.Delineated three forecast targets: Guilaizhuang-Zengjiazhuang, Mofanggou- Yingziwa, Dapinganzhuang-Maoyu. Predicted the metallogenic depth of the forecast target. In the delineated targets, Dapingan and Maoyu gold points have the value of further investigation.更多还原