摘要
运用地质异常理论和方法,对大瑶山西侧地区沉积、构造、蚀变、土壤次生晕异常特征、有机质与成矿的关系进行了定性和定量分析。结果表明,泥盆纪沉积异常为成矿提供了物质来源;海平面升降产生的层序边界面为成矿提供了有利的含矿建造,并制约着大瑶山成矿带的时空结构;构造复杂度异常控制了矿带的展布和矿床的空间分布;蚀变异常控制了矿体的空间定位和矿床后期改造特征;土壤次生晕异常则反映了矿化的空间分带和组合特征。基于综合地质异常与控矿分析,利用GIS平台提取异常致矿信息,圈定成矿有利地段,为该区成矿预测及找矿勘探提供依据。
Applying the theory and method of geological anomaly,we analyze the anomaly characters of the sediments,structures,alteration and geochemical secondary halos and the relationship between the anomalies and deposits west of the Dayao Shan Mountains,Guangxi Province.The results demonstrate that the anomalous sediments of Devonian time offered the material sources for the metallogenesis.The strata succession interfaces generated by sea level changes offered the favorable ore-bearing formation and determined the spatial-temporal pattern of the Dayaoshan metallogenic belt.The complexity of structures has major influence on the distributions of the metallogenic belt and mineral deposits.The alteration anomaly controlled the orebody＇s orientations and characters of later modification.The geochemical secondary halos anomaly shows the spatial zones of mineralization and their combination characters.Based on comprehensive analysis on the geological anomalies and mineralization conditions,using the platform GIS to extract the information of ore-generating anomalies and delineate prospective sections,this work offers scientific evidence for ore resource prediction and exploration in this region.
出处
《地质与勘探》
CAS
CSCD
北大核心
2010年第2期314-322,共9页
Geology and Exploration
关键词
地质异常
控矿分析
泥盆系
大瑶山
geological anomaly
mineralization condition
Devonian
Dayao Shan Mountains
