摘要
苏巴什铀矿点位于吐哈盆地艾丁湖斜坡带最西端,是近年在吐哈盆地新发现的铀矿点。通过岩心观察、化学分析、薄片、电子探针和扫描电镜等测试手段,对铀矿地质特征、物源、铀源、铀矿物赋存状态、氧化蚀变、粘土矿物等进行研究,结合前人成果,系统总结苏巴什铀成矿规律。研究表明,铀矿化产于中侏罗统西山窑组,主要呈板状,矿石矿物以铀的钛氧化物为主,铀石次之。铀矿化与层间氧化蚀变、有机质、粘土矿物密切相关,主要赋存于层间氧化蚀变带翼部灰色砂岩中。矿石中粘土矿物以伊利石为主,富含有机质,侏罗纪晚期到渐新世末期,构造活动引发富氧含铀流体渗入,形成完整的“补-径-排”流体成矿系统,最终导致铀成矿作用发生。分析苏巴什铀成矿规律,建立成矿模式,可为吐哈盆地及同类地区铀矿勘查和研究提供指导作用。
The Subashi uranium deposit is located in the westernmost part of the Aiding Lake slope zone in the Turpan-Hami Basin.It is a newly discovered uranium deposit in the Turpan-Hami Basin in recent years.By means of core observation,chemical analysis,thin section,electron probe and scanning electron microscope,the geological characteristics,provenance,uranium source,occurrence state of uranium minerals,oxidation alteration and clay minerals of uranium deposits are studied.Combined with previous achievements,the uranium metallogenic regularity of Subashi is systematically summarized.Comprehensive studies have shown that uranium mineralization occurs in the Xishanyao Formation of the Middle Jurassic,and its morphology is mainly plate-like.The ore minerals are mainly titanium oxides of uranium,followed by uraninite.Uranium mineralization is closely related to interlayer oxidation alteration,organic matter and clay minerals.It mainly occurs in the gray sandstone of the wing of the interlayer oxidation alteration zone.The clay minerals in the ore are mainly illite and rich in organic matter.From the late Jurassic to the late Oligocene,tectonic activities triggered the infiltration of oxygen-rich uranium-bearing fluids,forming a complete'supplement-diameter-discharge'fluid metallogenic system,which eventually led to the occurrence of uranium mineralization.The analysis of the metallogenic regularity of Subashi uranium and the establishment of metallogenic model can provide guidance for the exploration and research of uranium deposits in Tuha Basin and similar areas.
作者
曹雷
王刚
尚高峰
Cao Lei;Wang Gang;Shang Gaofeng(No.203 Research Institute,China National Nuclear Corporation,Xi’an,Shaanxi,710086,China)
出处
《新疆地质》
CAS
CSCD
2023年第4期547-554,共8页
Xinjiang Geology
基金
中国核工业地质局铀矿项目新疆吐哈盆地南缘铀矿资源调查评价与勘查(202218)
新疆吐哈盆地苏巴什-小草湖地区铀矿资源调查评价(202218-2)共同资助。
关键词
吐哈盆地
苏巴什
铀矿化
粘土矿物
铀成矿作用
Subashi
Uranium mineralization
Clay minerals
Uranium mineralization
