论文部分内容阅读
笔者运用地质异常理论和方法,对长江中下游地区沉积、构造和岩浆岩异常的类型及特征进行了定性和定量分析。研究结果表明,沉积异常是导致矿床层控性的主要因素;地壳升降运动产生的升降异常带为成矿提供了有利的含矿建造;构造复杂度异常控制了铜铁金矿床的空间定位和分带;中生代岩浆岩的异常演化是铁、铜元素从岩浆中分离,并富集成矿的必要地质过程;岩浆岩的时空分布异常制约着铁铜金矿带的时空结构;地质组合熵异常是反映多种地质因素组合的成矿有利程度的综合变量,可作为矿产定量预测的评价指标。
Using the theories and methods of geological anomalies, the author qualitatively and quantitatively analyzed the types and features of sedimentary, structural and magmatic anomalies in the middle and lower reaches of the Yangtze River. The results show that the sedimentary anomaly is the main factor leading to the stratigraphic controllability of the ore deposit. The anomaly belt caused by the ascending and descending movements of the crust provides favorable ore-bearing construction for ore-forming. The structural complexity anomalies control the spatial orientation and distribution of the copper- The abnormal evolution of Mesozoic magmatic rocks is the necessary geological process for the separation of iron and copper elements from magma and enrichment of mineralization. The spatial and temporal distribution of magmatic rocks restricts the spatio-temporal structure of iron-copper-gold belt. The abnormal entropy of geological assemblages is a reflection The comprehensive variable of metallogenic benefit of the combination of multiple geological factors can be used as the evaluation index of mineral quantitative prediction.