大冶—九瑞地区局部地质异常特征与成矿

从地质异常的角度，重点分析了大冶—九瑞地区主要地质异常的特征及其对成矿的影响．由分析可知：基底断裂异常控制了本区若干重要规模较大的隐伏岩基及伴生矿田，而盖层构造异常控制铜金矿床和铁铜矿床的空间位置；地层的地球化学异常和岩相古地理异常是造成一些铜金矿床层控性的主要地质因素；盖层的岩性异常为含矿热液的渗流、循环、聚集和矿质沉淀等一系列成矿作用提供了有利的物理和化学条件；中生代岩浆岩的异常活动期也是本区主要的铁铜成矿期，岩浆岩系统的多层分枝和分带性结构控制了本区成矿系统的三维空间分布．在上述分析的基础上，构置了地质组合熵作为反映控矿地质因素组合系统结构复杂程度的综合变量，并圈定出组合熵异常，由此确定了综合地质异常与矿床的关系．

CHARACTER OF THE LOCAL GEOLOGICAL ANOMALY AND MINERALIZATION IN DAYE-JIURUI REGION

By applying the theory and method of geological anomaly, it is focused on the analysis of the characters of major geological anomalies and their effect of mineralization in Daye-Jiurui region. The analysis result shows that the basement fault anomalies control a few major large hidden batholiths and their associated orefields; that the anomalies of cover structure confine most Cu-Au deposits and Fe-Cu deposits within their scope; that the geochemical anomalies and lithofacies-paleogeographical anomalies are major geological factors leading to strataboundness of some Cu-Au deposits; that the anomalies of rock properties provide the favorable chemical and physical conditions for the ore-forming process, including the seepage, circulation, convergence and deposit of ore-bearing hydrothermal solution; that the anomalous active stage of Mesozoic magmatite is almost consistent with the major mineralization epoch of the Fe, Cu deposits, and the structure of multi-levels, and the zoning in magmatic system determine the spatial distribution of the mineralization system. Then, based on the above analysis, a comprehensive variate, geological combination entropy, is brought forward for reflecting the complex degree of the combination of geological ore-controlling factors. After circumscribing the anomalies of geological combination entropy, the relations between the anomalies and ore deposits are determined.