【作者】 赵旭林；

【导师】 刘亮明；

【作者基本信息】 中南大学 ， 矿物学、岩石学、矿床学， 2009， 硕士

【摘要】 铜山铜矿位于安徽贵池,为一矽卡岩矿床。以往对这个矿床的研究主要注重于岩体和矿床地球化学特征,本文针对其构造的特殊性,通过对矿区地质资料系统整理、三维地质建模和地质构造调查,在系统总结矿床地质地球化学特征的基础上,分析了构造控矿规律及其动力学机制,主要取得如下5个方面的成果。1.首次建立了矿体及相关要素的三维模型,为准确展现各地质要素的空间关系、从而全面分析构造控岩控矿规律创造了新的途径。2.通过分析矿体品位的空间分布,发现:29、30号矿体在上部比较分散,往下部富集部位趋于集中;4号矿体在接触带陡转部位比平缓部位更为富集,这可能与控矿断裂构造的产状变化相关。3.通过对矿田构造的全面调查分析,论证了逆冲-褶皱系统对成矿岩体的控制,预测了可能成矿的隐伏岩体。4.首次提出并论证了斜滑双冲断层系统的控矿作用,为对隐伏矿体的勘查提供依据。5.通过对断层的统计分析,发现前期构造对后期构造具有制约性影响,造成了构造特征的复杂化。更多还原

【Abstract】 Tongshan copper deposit, located at the Guichi, Anhui province, is a skarn deposit. Previous research focused on the geochemistry characteristic of ore-related intrusion and the deposit. In this paper, research focus is on it’s structures. By the comprehensive analysis of all existing geo-data, three-dimensional geological modeling and structural geology surveying, the regularity of structural controlling on ore-bodies and its dynamic mechanism are analyzed, based on systematic summary of geological and geochemical characteristics of the deposit. Major accomplishments achieved in this thesis include 5 aspects as following.1) The 3D modeling of ore bodies and the related geo-factors are first accomplished, that is a new method for demonstrating spatial relationship of all geological factors and analyzing the regularity structural controlling on ore bodies.2) By analyzing the spatial distribution of Cu grade in ore-bodies, it is demonstrated that, for the ore-bodies of No.29 and No.30, the high grades are scattered in the upper but become more concentrated down under; for the 4^th ore body, the high grades are concentrated in the most crooked segment rather that the flat segment of the contact zone. This distinction distribution of Cu in ore bodies may be related to the mode variation of ore-controlling faults.3) By comprehensive investigation and analysis on the ore field structural geology, control of thrust-fold system on ore-related intrusion is demonstrated, and a hidden intrusion probably related to Cu mineralization is predicted.4) An oblique-slip duplex fault system is discovered and its controls on ore bodies is demonstrated, which can be used as basis for predicting ore bodies.5) By statistical analysis on the occurrence mode of the fault and fractures, it is found that early structure might have a successive influence on the late structures, resulting in complix of the structural characteristics.更多还原