松辽盆地南部砂岩型铀矿成矿主控因素及找矿方向  

The major controlling factors and prospecting guide of sandstone-type uranium mineralization in southern Songliao Basin

作　　者：赵忠华[1,2] 张振强[2] 于文斌[3] 董清水[4] 

机构地区：[1]东北大学,辽宁沈阳110004 [2]核工业240研究所,辽宁沈阳110032 [3]核工业243大队,内蒙古赤峰024006 [4]吉林大学,吉林长春130026

出　　处：《世界核地质科学》2012年第4期199-202,226,共5页World Nuclear Geoscience

基　　金：中国核工业地质局"十一五"生产中科研课题

摘　　要：松辽盆地南部是砂岩型铀矿勘查的重点区,已发现中型铀矿床1个,具备较好的成矿潜力。目的层姚家组、泉头组可识别4种主要沉积相和12种沉积亚相。铀矿体主要产于辫状河河道亚相和冲积扇扇中亚相砂体中。断裂构造对铀成矿具控制作用。油(煤)气藏作用是铀成矿的必要条件。铀矿主控矿因素为辫状河道沉积砂体、断裂反转构造形成的剥蚀天窗、后生氧化与油(煤)气还原作用。建立了8条找矿标志,优选出白兴吐—架玛吐、协尔苏—金宝屯I级成矿远景区2片,杨大城子、交力格—包日温都Ⅱ级成矿远景区2片。勘查表明,上述两个I级成矿远景区内已取得突破性找矿成果。Southern Songliao Basin is with great potentiality for sandstone-type uranium mineralization, where a mid-size uranium deposit has been found is a significant area. Four sedimentary facies and twelve sedimentary subfacies can be distinguished in both Yaojia and Quantou Formation. The orebodies mainly occurred in the sandstone bodies of braided stream channel subfacies and alluvial mid-fan subfacies. The uranium mineralization is controlled by fracture and oil （coal）, and gas pool is a necessary condition for it. The main factors to controll the mineralization are sedimentary sand body of braided stream, denuded strata caused by reversed structure, epigenetic oxidation reduction. Eight prospecting symbols are presented, 2 class Ⅰ areas and 2 class Ⅱpotential areas are selected for detailed survey, some breakthrough results have been made in the former 2 areas.

关 键 词：松辽盆地南部 有利砂体 断裂构造 油气还原 找矿标志 

分 类 号：P614.19[天文地球—矿床学] P612[天文地球—地质学]