中祁连西段余石山铌钽矿含矿地层重新厘定及意义  

Redefinition of Yushishan Nb-Ta Deposit Bearing Strata in Western Central Qilian and Its Significance

作　　者：吴义布[1] 余君鹏[1,2] 司豪佳 褚广博 司东泽 王怀涛 曹晓锋[3] WU Yi-bu;YU Jun-peng;SI Hao-jia;CHU Guang-bo;SI Dong-ze;WANG Huai-tao;CAO Xiao-feng(Geological Survey of Gansu Province,Lanzhou 730000,China;School of Earth Sciences,Lanzhou University,Lanzhou 730000,China;School of Earth Resources,China University of Geosciences(Wuhan),Wuhan 430074,China)

机构地区：[1]甘肃省地质调查院,兰州730000 [2]兰州大学地质科学与矿产资源学院,兰州730000 [3]中国地质大学(武汉)资源学院,武汉430074

出　　处：《科学技术与工程》2024年第4期1370-1377,共8页Science Technology and Engineering

基　　金：国家重点研发计划(2017YFC0602400)。

摘　　要：余石山变粒岩型铌钽矿是近年在中祁连西段发现大型铌钽矿,但对铌钽矿含矿地层归属厘定不清,在梳理前人研究成果基础上,通过野外精细调研和区域对比,重新厘定了这套地层,建议将其从长城纪熬油沟组中解体出来,建立新的岩石地层单位,即新元古代余石山岩组;同时,分析余石山岩组原始层序,总结其形成过程。研究成果为中祁连地块西段地层对比和研究提供了新材料,也为中祁连西段变粒岩型铌钽矿找矿和成矿研究提供了基础。Yushishan Leptynite type Nb-Ta Deposit is a large Nb-Ta ore deposit discovered in western Central Qilian in recent years.However,the attribution of Nb-Ta ore bearing strata is unclear.On the basis of combing previous research results,through fine field research and regional comparison,this suit of strata has been redefined.It was disassembled from the Changcheng period Aoyougou Formation to establish a new lithostratigraphic unit,named the Neoproterozoic Yushishan Formation.The original sequence of Yusishan Formation was analyzed,and the formation process was also summarized.The research results not only provide new materials for stratigraphic contrast and research in the western section of the Central Qilian massif,but also provide a basis for prospecting and metallogenic research of Yusishan Leptynite type Nb-Ta deposit in the western section of the central Qilian massif.

关 键 词：中祁连西段 余石山变粒岩型铌钽矿 含矿地层厘定 余石山岩组 

分 类 号：P536[天文地球—古生物学与地层学]