铀矿地质
鈾礦地質
유광지질
URANIUM GEOLOGY
2014年
5期
271-275
,共5页
泥砾砂岩%岩石学特征%钱家店铀矿床
泥礫砂巖%巖石學特徵%錢傢店鈾礦床
니력사암%암석학특정%전가점유광상
mud gravelled sandstone%petrological characteristic%Qianjiadian uranium deposit
钱家店凹陷中的含矿层位主要为上白垩统姚家组，在实际勘探过程中经常见姚家组发育的红色泥砾砂岩中存在铀的富集。笔者对钱家店钱Ⅱ块铀矿床红色泥砾砂岩的岩石学特征、U 和 Ra含量特征进行了分析，结果表明，红色泥砾砂岩形成于还原性沉积环境，铀矿化主要在沉积成岩期富集而成。红色泥砾砂岩在成岩期后遭受氧化并发生铀的迁移。
錢傢店凹陷中的含礦層位主要為上白堊統姚傢組，在實際勘探過程中經常見姚傢組髮育的紅色泥礫砂巖中存在鈾的富集。筆者對錢傢店錢Ⅱ塊鈾礦床紅色泥礫砂巖的巖石學特徵、U 和 Ra含量特徵進行瞭分析，結果錶明，紅色泥礫砂巖形成于還原性沉積環境，鈾礦化主要在沉積成巖期富集而成。紅色泥礫砂巖在成巖期後遭受氧化併髮生鈾的遷移。
전가점요함중적함광층위주요위상백성통요가조，재실제감탐과정중경상견요가조발육적홍색니력사암중존재유적부집。필자대전가점전Ⅱ괴유광상홍색니력사암적암석학특정、U 화 Ra함량특정진행료분석，결과표명，홍색니력사암형성우환원성침적배경，유광화주요재침적성암기부집이성。홍색니력사암재성암기후조수양화병발생유적천이。
Ore bearing sequence in Qianjiadian sag is mainly the Upper Cretaceous Yaojia formation.In the exploration,the red muddy gravel sedimentation is often found with uranium enrichment in Yaojia for-mation.According to the result of petrological characteristic and content of uranium and radium analysis, the red muddy gravel was originally formed in reducing environment and the uranium enrichment was controlled by reduction condition in deposition diagenesis stage which made the uranium precipitation and enrichment possible.Oxidation after diagenesis made the sediment turning into red and cause the acti-vation and migration of uranium.
