道朗和都格地区重磁场特征与找矿远景区  

GRAVITY AND MAGNETIC FIELD CHARACTERISTICS AND ORE-SEARCH PROSPECT DISTRICTS IN DAOLANG AND DUGE AREA

作　　者：邰振华[1] 张凤旭[1] 吴燕冈[1] 

机构地区：[1]吉林大学地球探测科学与技术学院,吉林长春130026

出　　处：《物探与化探》2011年第6期762-767,共6页Geophysical and Geochemical Exploration

基　　金：国家油气选区重大项目(14B09XQ1201-01);"十一五"国家科技支撑计划项目(2006BAB01A02)联合资助

摘　　要：道朗和都格地区为华北板块北缘的一个多金属成矿区,为了预测研究区多金属矿产的分布情况,利用位场数据处理中的向上延拓、对垂向一阶导数的小子域滤波和重磁对应分析等方法,对该区1∶5 000重磁资料进行了处理。综合分析了研究区重力场、磁力场、重力剩余场、重力垂向一阶导数、重磁对应分析中相关系数的基本特征及其与岩矿石密度和磁化率的分布关系。结合研究区地质资料及钻井资料,划分出5条断裂,圈定了11处金属找矿远景区,并综合分析了断裂划分及找矿远景区圈定的依据。Daolang and Duge area is a polymetallic ore-forming belt on the northern margin of the North China Plate.In order to forecast polymetallic distribution in this area,the authors employed such means as upward continuation,small subdomain filtering of the first vertical derivative and corresponding analysis of gravity and magnetic anomalies to process the 1∶5 000 gravity and magnetic data.Characteristics of gravity and magnetic fields,residual gravity field,the first vertical derivative of gravity anomaly,correlation coefficient R of gravity and magnetic corresponding analysis and their relationship with the density and magnetic susceptibility of rocks and minerals were analyzed comprehensively.Combined with the regional geology and drilling data in this area,the authors delineated 5 faults,11 ore-forming prospect areas,and analyzed the basis for delineation of faults and prospect areas comprehensively.

关 键 词：向上延拓 垂向一阶导数 小子域滤波 重磁对应分析 重磁场特征 找矿远景区 

分 类 号：P631[天文地球—地质矿产勘探]