黑龙江省尚志县帽儿山塌陷式火山盆地铀成矿条件分析

摘要

Located in the southwest of Yichun volcanic uranium mineralization prospective belt , Maoershan basin is a J3 K1 period medium small volcano collapse basin ,which is a part of northeast strike Binxian Yichun Ganxin volcanic uranium molybdenum mineralization belt.By studying the condition of tectonic posi-tion , stratigraphy ,intrusive rocks ,structures ,mineral resources ,it was found that Maoershan basin is with the characteristics of uranium production volcano basin in tectonic position , basin scale and structure , basin formation period ,mafic magmatism after the main period of volcanic activity ,uranium concentration of base-ment and overlayer , volcanic cycles and lithology , fracture-volcano structure system , wall rock alteration and uranium-polymetallic mineralization ,sandstone-conglomerate formation before the main period of volcanic activity ,gravity and magnetic field. Therefore , the basin was believed to have good mineralization prospect and future uranium exploration work should be carried out.%帽儿山盆地位于伊春火山岩型铀成矿远景带西南段，是宾县伊春甘欣 NE 向火山岩型铀钼成矿带的组成部分，为 J3 K1的中小型塌陷式火山盆地。文章从大地构造、地层、侵入岩、构造、矿产等基础地质特征入手，对盆地大地构造位置、盆地规模及形成时期、构造特征、岩浆活动、基底及盖层的含铀性、火山旋回及岩性岩相、断裂火山构造系统、围岩蚀变及铀多金属矿化特点、重磁场特征等10个方面进行分析，认为该火山盆地与产铀火山盆地的特征相类似，具有良好的找矿前景，可进一步开展铀矿普查工作。