中国地质2025，Vol.52Issue(6)：1963-1982,20.DOI:10.12029/gc20230412001
松辽盆地乾安地区四方台组砂岩型渗入-渗出耦合轴成矿模式与找矿方向
Exudation-infiltration coupled mineralization model and prospecting direction of sandstone-type uranium deposit in Sifangtai Formation,Qian'an area,Songliao Basin
摘要
Abstract
This paper is the result of mineral exploration engineering. [Objective]The study of uranium metallogenic conditions and mineralization model of Sifangtai Formation,Qian'an area in the hinterland of Songliao basin is relatively weak.Comprehensively analyzing the mineralization conditions of the sandstone-type uranium deposits,evaluating their mineralization potential,and clarifying their exploration directions can develop new direction for uranium exploration in the Songliao Basin.[Methods]Through comprehensive analysis of core,logging,seismic,trace element and other data,the tectonics,stratigraphy and transformation of Sifangtai Formation in Qian'an area has been sorted,and it is the first time to systematically summarize the uranium metallogenic elements of sandstone-type uranium deposits in the the hinterland of Songliao Basin.[Results]Sifangtai Formation in Qian'an area has favorable metallogenic conditions such as structural window,deep and large faults,braided river delta channel sand belts,good uranium source conditions and epigenetic transformation.It is considered that Sifangtai Formation infiltrative and exudative uranium metallogenic conditions,and exudative metallogeny is dominant.Based on these facts,the exudation-infiltration coupled uranium metallogenic model of Sifangtai Formation,Qian'an area,Centrel Songliao Basin,has been constructed.Finally,it is proposed that the braided river to braided river plain channel sand in Rangzhi-Chaganhua Town has great uranium metallogenic potential,which has been predicted to be the most favorable object for further exploration.[Conclusions]This study is the first to introduce exudative metallogeny into the systematic evaluation of uranium mineralization conditions in Sifangtai Formations of the Songliao Basin,changing the previous single approach of evaluating the target layer from the perspective of infiltration metallogeny.It can effectively expand the exploration thinking of the red variegated formations in the hinterland of the basin,thereby greatly expanding the prospecting range in the Songliao Basin.关键词
砂岩型铀矿/铀成矿条件/四方台组/盆中腹地找矿/松辽盆地/矿产勘查工程Key words
sandstone-type uranium/metallogenic conditions/Sifangtai Formation/mineral prospecting in the hinterland basin/Songliao Basin/mineral exploration engineering分类
天文与地球科学引用本文复制引用
邢作昌,贾立城,王秀杰,罗敏,吴大坤,刘武生,林效宾..松辽盆地乾安地区四方台组砂岩型渗入-渗出耦合轴成矿模式与找矿方向[J].中国地质,2025,52(6):1963-1982,20.基金项目
砂岩型铀矿多重耦合地质成矿作用与时空定位技术(中核科发[2021]143号地SD01)与核工业北京地质研究院院长青年基金项目(地QJ2003)联合资助. Supported by the projects of Multiple Coupling Geological Mineralization and Spatiotemporal Positioning Technology of Sandstone-type Uranium Deposits(No.2021-143-SD01)and Dean Youth Science and Technology Innovation Fund of BRIUG(No.QJ2003). （中核科发[2021]143号地SD01）
