基于斑岩成矿体系结构的深部找矿预测——以鄂东丰山铜金矿田为例  

PREDICTION FOR DEEP ORE PROSPECTING BASED ON THE STRUCTURE OF A PORPHYRY METALLOGENIC SYSTEM:ACCORDING TO FENGSHAN Au-Cu ORE FIELD

作　　者：舒广龙[1] 马诗敏[1] 刘继顺[2] 

机构地区：[1]沈阳地质矿产研究所,沈阳110032 [2]中南大学,长沙410083

出　　处：《地质与勘探》2007年第2期1-7,共7页Geology and Exploration

基　　金：国家自然科学基金项目(编号:40072032)资助。

摘　　要：深部找矿预测已成为当前成矿学和成矿预测学的科学前沿和研究重点。近年来,在丰山矿田找矿研究中,不但发现了卡林型金矿和一些新的找矿线索,而且还取得一些对矿田成矿的新认识。这些新发现和新认识,为建立完善的斑岩成矿体系三维准实体模型和深部找矿预测提供了新的机遇和条件。矿田包括夕卡岩型铜金矿、斑岩型铜钼矿、热液脉型多金属(金)矿和卡林型金矿等矿床类型,它们常与燕山期花岗闪长斑岩相伴,是在同一成矿系统中形成的斑岩成矿系列,松弛化的推覆构造控制矿田成岩成矿作用。矿田斑岩成矿体系结构在矿床类型等方面具有明显的分带性,利用这种分带性,优选找矿靶区和找矿方法,确定找矿靶位,经工程验证于深部发现铜金工业矿体。Predietion for deep ore prospecting is a frontier and key research in metallogeny and metallogenic prognosis. In the recent years, by researches of ore prospecting in the Fengshan orefield, not only Carlin - type gold deposits and some new clues of ore prospecting are discovered, but also some new insights about mineralization of the ore field are obtained. These discoveries and insights provide new opportunity and condition for establishing perfect three - dimensional model similar to entity of porphyry metallogenie system and prediction for deep ore prospecting. There are skarn Cu - Au, porphyry Cu -Mo, hydrothermal vein -type polymetallie （Au） and Carlin -type deposits in the orefield, they often coexist with Yanshanian granodiorite- porphyry and are porphyry metallogenic series formed by the some metallogenie system. Relaxed nappe structures control Yanshanian magmatism - metallizafion in the orefield. Porphyry metallogenie system possesses obvious zonations at aspects of ore types and others. According to the zonations, target areas and prospecting methods are chosen, and location of hidden ore bodies is ascertained. Rich and thick Au - Cu ore bodies have been discovered by a validating drill hole.

关 键 词：斑岩成矿体系 深部找矿 丰山矿田 鄂东 

分 类 号：P612[天文地球—矿床学] P618.41[天文地球—地质学]