CAJ | 학술논문

通过岩心观察、薄片鉴定、扫描电镜分析等手段，将松辽盆地钱家店地区姚家组铀储层划分为姜黄色-紫红色氧化砂岩、含矿灰色砂岩、原生灰色砂岩3种类型，并讨论了含矿岩系主要的成岩作用类型，划分了成岩演化序列。研究表明：该区砂岩的成分成熟度和结构成熟度都较低，轻矿物的成熟度指数（Q／（F＋R））平均值仅为0．56，SiO2／Al2 O3为6．69；含矿岩系成岩作用较强，主要类型有压实作用、胶结作用、交代作用、溶蚀作用及黏土矿物的转化等；通过对矿物之间穿插关系的分析，确立了成岩演化序列为結球状、细粒状黄铁矿—早期方解石胶结（泥晶方解石）—石英次生加大—碎屑颗粒溶解次生矿物形成（黏土矿物交代碎屑颗粒）—孔隙充填方解石（亮晶方解石、含铁白云石形成）—方解石交代碎屑颗粒—黑云母水解、自形、他形黄铁矿。本研究探讨了砂岩赋铀性与岩石结构组分的关系，为揭示成岩作用对铀运移沉淀富集的影响提供参考。
통과암심관찰、박편감정、소묘전경분석등수단，장송료분지전가점지구요가조유저층화분위강황색-자홍색양화사암、함광회색사암、원생회색사암3충류형，병토론료함광암계주요적성암작용류형，화분료성암연화서렬。연구표명：해구사암적성분성숙도화결구성숙도도교저，경광물적성숙도지수（Q／（F＋R））평균치부위0．56，SiO2／Al2 O3위6．69；함광암계성암작용교강，주요류형유압실작용、효결작용、교대작용、용식작용급점토광물적전화등；통과대광물지간천삽관계적분석，학립료성암연화서렬위결구상、세립상황철광—조기방해석효결（니정방해석）—석영차생가대—쇄설과립용해차생광물형성（점토광물교대쇄설과립）—공극충전방해석（량정방해석、함철백운석형성）—방해석교대쇄설과립—흑운모수해、자형、타형황철광。본연구탐토료사암부유성여암석결구조분적관계，위게시성암작용대유운이침정부집적영향제공삼고。
Based on drill core observation,thin section identification,scanning electron microscopy (SEM)analysis,quantitative statistics and other techniques,the uranium reservoir of the Yaojia formation in the Songliao Basin Qianjiadian area is divided into three types,i.e.ginger-purple oxide sandstone,ore gray sandstone and primary grey sandstone.Additionally,characteristics of ore-containing sandstones and diagenesis process are discussed.Results show that both compositional and structural maturity of the sandstone are low,the average light mineral compositional maturity index only 0.56,SiO2/Al2 O3 is 6.69.The diagenesis in-tensity of uranium bearing rock series is strong,which include compaction,cementation,metasomatism,dissolution and clay mineral transformation.By analyzing intervening relationships of diagenetic minerals,the following diagenetic evolutionary se-quence is determined:framboidal and fine grained pyrite,early calcite cementation (micrite calcite),the secondary overgrowth of quartz,dissolution of clastic particles,secondary mineral formation(clay mineral replacing clastic particles),pore filling calcite (sparry calcite and iron dolomite formation),calcite replacement of clastic particles,biotite hydrolysis,euhedral and anhedral py-rite.This research provides an important discussion on relationships between sandstone uraniferous characteristics and rock com-ponents,and reveal the influence of diagenesis on uranium’s migration and precipitation.