内蒙古东乌旗布尔罕特地区物化探异常特征及找矿远景

The characteristics of geophysical and geochemical anomalies in Buerhante area of East Ujimqin Banner,Inner Mongolia and prospecting potential of the area

内蒙古东乌旗布尔罕特地区位于大兴安岭多金属成矿带的中部,区内发育晚侏罗世及早白垩世两期A型花岗岩侵入上泥盆统安格尔音乌拉组中,具有十分有利的成矿地质条件。本文基于在该区开展的1∶1万土壤地球化学测量和地面1∶1万磁测工作,圈出了3个土壤地球化学甲级异常和2个负磁异常区。土壤地球化学异常主要异常元素为Ag、Pb、Zn及Au等,浓集中心明显,套合良好;地面高精度磁测异常区与化探异常及新发现的银铅锌矿化点高度套合。综合分析布尔罕特地区的成矿地质条件及物化探异常特征,认为该区具有良好的热液型银铅锌多金属矿成矿远景,有望取得找矿突破。

The Buerhante area of East Wjimqi Banner,Inner Mongolia is located in the middle of the Daxinganling polymetallic ore belt.Late Jurassic and early Cretaceous A-type granites are developed and intrude into the Upper Devonian Angeryinwula Formation thus metallogenic geological conditions very favorable in the area.Soil geochemical survey at scale 1∶10000 and ground magnetic survey at scale 1∶10000 were carried out and 3 soil geochemical anomalies I and 2 negative magnetic anomalies are identified.Ag,Pb,Zn and Au,are the anomaly elements of the soil geochemical anomaly and the concentration center is obvious.The element anomalies are well interlocked.The high precision magnetic anomaly area on the ground matches the geochemical anomaly and the newly discovered silver lead-zinc mineralization.Based on the comprehensive analysis of metallogenic geological conditions and characteristics of the geophysical and geochemical anomalies the author considers that the area potential for prospecting hydrothermal Ag-Pb-Zn polymetallic deposit and a breakthrough is expected here.