摘要
伊犁盆地是一个中生代陆相盆地 ,其南缘下 -中侏罗统含煤地层十分发育。水西沟群划分为八道湾组、三工河组和西山窑组 ,沉积相分属于冲积扇相、三角洲相和湖泊相。可地浸砂岩型铀矿主要赋存于冲积扇扇中辫状河道微相和三角洲平原分流河道及泥炭沼泽微相。其铀矿床的主要控制因素是 :盆地基底及周边地层含铀性 ;盆地周边构造发育条件 ;岩相古地理 ;沉积微相 ;成岩作用 ;地下水作用和氧化 -还原地球化学分带。
Well developed lower middle Jurassic occurred in the south part of Yili Mesozoic terestrial basin.The lower middle Jurassic Shuixigou Group was divided into BaDaowan Formation,Sangonghe Formation and Xishanyao Formation,Which were characterized by sedimentary facies of alluvial fan,delta and lake faces.The Uranium deposits in the sandstone mainly occurred in the braided channel of the middle part of the alluvial fan,channel of delta plane and marsh. The ore controlling conditions of the Uranium deposits were studied.There were 7 factors responsible for the formation of uranium deposits in the area:the uranium content in the basement and around the margin of the basin;structural development the basin magin;paleogeography;diagenesis;undergroundwater;Eh and pH geochemical zonation.
出处
《矿物岩石》
CAS
CSCD
北大核心
2003年第1期30-36,共7页
Mineralogy and Petrology
