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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.
From the perspective of geological anomalies, the characteristics of major geological anomalies in Daye-Jiu-Rui area and their effects on metallogeny are analyzed. From the analysis, we can see that: the basement fault anomalies control a number of important large-scale buried and associated ore fields in this area, while the caprock structure anomalies control the spatial location of copper-gold deposits and iron-copper deposits; the geochemical anomalies of strata and rocks Paleoproterozoic geophysical anomalies are the main geologic factors that result in the stratigraphic controllability of some copper-gold deposits. The lithologic anomalies in the cap rocks provide favorable physical and chemical properties for mineralization such as seepage, circulation, accumulation and mineralization of mineralized hydrothermal fluids Chemical conditions; Mesozoic magmatic rocks during the anomalous period is also the main iron-copper mineralization in this area, the magmatic rock system of multi-layer branching and zoning control of the three-dimensional spatial distribution of metallogenic systems in this area. Based on the above analysis, the geological combination entropy is constructed as an integrated variable reflecting the structural complexity of the combination system of ore-controlling geological factors, and the combination entropy anomaly is delineated to determine the relationship between the integrated geological anomalies and the deposit.