冀东孤山子航磁异常特征及其找矿前景  

Aeromagnetic Anomaly Characteristics and Prospecting Potential of the Gushanzi Area in Eastern Heibei Province

作　　者：范正国[1] 黄旭钊[1] 杨雪[1] 张洪瑞[1,2] 周道卿[1,2] 刘前坤[1] 谭林[1] 

机构地区：[1]中国国土资源航空物探遥感中心,北京100083 [2]中国地质大学(北京),北京100083

出　　处：《地质与勘探》2012年第4期750-759,共10页Geology and Exploration

基　　金：地质大调查项目"重要铁矿成矿区带航磁靶区优选"(项目编号为1212010913037)

摘　　要：冀东孤山子航磁异常为冀东三大航磁异常之一,且位于冀东石人沟-板城铁矿集中区。通过对本区地质构造特征、岩矿石物性及重磁异常特征等进行综合研究,认为孤山子航磁异常并非完全由孤山子基性-超基性岩杂岩体和已控制的浅地表超贫磁铁矿体所引起,进而采用2.5D拟合技术进行了定量拟合计算和资源量估算,认为孤山子航磁异常具有较好的找铁矿前景。同时,通过对孤山子航磁异常的推断解释,总结了减少航磁异常解释多解性的思路与做法。The aeromagnetic anomaly in the Gushanzi area is one of the three major aeromagnetic anomalies in eastern Hebei Province,which is located in the Shirengou-Bancheng iron ore concentration area.Studies of its geological structure,physical properties of rocks and ores,as well as its gravitational and aeromagnetic anomalies suggest that the Gushanzi mafic-ultrabasic intrusive complex and shallow ultra-low-grade magnetite ore are not completely responsible for this aeromagnetic anomaly.The results of 2.5D quantitative calculation and resource estimation indicate that the Gushanzi aeromagnetic anomaly may imply a promising potential for iron ore.And through interpretation of the Gushanzi aeromagnetic anomaly,this paper summarizes the ideas and methods of reducing ambiguity in interpretation of aeromagnetic anomalies.

关 键 词：航磁异常 铁矿 超贫磁铁矿 找矿前景 

分 类 号：P618.31[天文地球—矿床学] P631.24[天文地球—地质学]