摘要
红石泉矿床位于龙首山铀成矿带的西段,是我国发现的最为典型的伟晶岩型铀矿床,具有岩体型矿化的特点,铀矿化发育于伟晶岩体内部和接触混染带内。通过对含矿主岩伟晶岩进行系统研究表明,红石泉矿床中铀以晶质铀矿、沥青铀矿和铀黑形式存在。在中条造山运动晚期(1735±67)Ma形成初始铀矿化,并在海西期(356±46)Ma部分矿石发生了热液叠加改造。早期岩浆成矿阶段主要形成晶质铀矿,晚期热液叠加改造阶段主要形成沥青铀矿,并发育了与芨岭钠交代型铀矿床相似的“四位一体”蚀变组合,热液改造过程是一个去K、增Na的过程。
Hongshiquan uranium deposit is in the western part of Longshoushan Mountain uranium metallogenic belt in Gansu Province.It is the most typical pegmatite type uranium deposit discovered in China.It has the characteristics of rock mass type mineralization.Uranium mineralization is strictly developed in the interior of pegmatite body and in contact-contaminated zone.A systematic study of the pegmatite of the main ore-bearing rock shows that uranium exists in the form of crystalline uranium ore,pitchblende and uranium black in the Hongshiquan deposit.Initial uranium mineralization was formed in the late stage of Zhongtiaoian(1,735±67)Ma,and part of ore underwent hydrothermal superimposition during Hercynian(356±46)Ma.Crystalline uranium deposits were mainly formed in the early magmatic metallogenic stage,and pitchblende was formed in the late hydrothermal superimposed transformation stage.A“four-in-one”alteration association similar to the Jiling sodium metasomatic uranium deposit was developed,the hydrothermal transformation process is a process of K removal and Na addition.
作者
王伟
王生云
刘涛
李天石
陈云杰
马骊
赵如意
宋振涛
WANG Wei;WANG Shengyun;LIU Tao;LI Tianshi;CHEN Yunjie;MA Li;ZHAO Ruyi;SONG Zhentao(No.203 Research Institute of Nuclear Industry,Xianyang,Shaanxi 712000,China;Beijing Research Institute of Uranium Geology,Beijing 100029,China;Airborne Survey and Remote Sensing Center of Nuclear Industry,Shijiazhuang,Hebei 050002,China)
出处
《现代地质》
CAS
CSCD
北大核心
2020年第2期244-253,共10页
Geoscience
基金
中国核工业地质局铀矿勘查项目(201803)
中国核工业地质局铀矿地质科研项目(201654)。
关键词
伟晶岩型铀矿床
铀存在形式
晶质铀矿U-Pb年龄
热液叠加改造
甘肃红石泉
pegmatite-type uranium deposit
uranium form
U-Pb age of crystalline uranium deposit
hydrothermal superimposition and transformation
Hongshiquan in Gansu Province
