摘要
通过对华北地台北缘翁牛特旗大朝阳沟地区2014年获得的1∶1万高精度时间域航空电磁、航磁资料的分析,重新厘定了华北地台北界的位置及产状,总结了不同矿种的航空电、磁特征。华北地台北界沿西南沟-小朝阳沟-上东三家一线呈向北凸出的弧形展布,界面总体外倾、倾角50°～70°,呈扭动弯曲的曲面向下延伸。相比于多金属矿和铅锌矿,金矿、铜金矿、铜金银矿等航空感应激发极化(AIIP)效应较强且与线性磁异常套合,具有明显的航空电、磁特征。据此,结合化探资料,圈定了金及多金属找矿靶区3片,对其中的2片利用Cole-Cole模型设计了建议钻孔2个。
A helicopter-borne VTEM time-domain airborne electromagnetic and magnetic survey with scale 1∶10 000 was flown over the Dachaoyanggou area which is located in the south of Wengniute County, north margin of North China Platform. Geophysical signature characteristics of different tectonic units and mineralization were observed in the electromagnetic and magnetic data. The boundary was redefined, which extends along the line from east to west, displaying as a north protruding arc in the plane, and its interface overall leans outward with angle 50 ° to 70 °, showing S shape twisting down. Compared with polymetals and lead-zinc deposit, the characteristics show strong airborne inductively induced polarization(AIIP) over the gold, copper-gold and copper-gold-silver deposit while aeromagnetic is simultaneous linear magnetic anomaly. Integration with geochemistry data helped to identify 3 new potential targets for the following exploration. Two of the targets were designed for the following-up two drills by Cole-Cole model.
作者
孙栋华
李怀渊
江民忠
骆燕
朱琳
彭莉红
牛家骥
Sun Donghua;Li Huaiyuan;Jiang Minzhong;Luo Yan;Zhu Lin;Peng Lihong;Niu Jiaji(Airborne Survey and Remote Sensing Center of Nuclear Industry,Shijiazhuang 050002,China;Key Laboratory of Uranium Resources Geophysical Exploration Technology,China Nuclear Industry Group Company,Shijiazhuang 050002,China)
出处
《地质科技情报》
CAS
CSCD
北大核心
2019年第2期25-30,共6页
Geological Science and Technology Information
基金
内蒙古自治区地质勘查基金管理中心项目(2014-01-KY04)
关键词
时间域航空电磁法
航磁
华北地台
槽台界线
找矿靶区
大朝阳沟地区
time-domain airborne electromagnetic
aeromagnetic
North China Platform
the boundary of geosyncline and platform
prospect target
Dachaoyanggou area
