准噶尔盆地北部含铀矿目的层白垩系岩相学及地球化学特征分析  

Analysis of Cretaceous Petrographic and Geochemical Characteristics of Uraniferous Target Layer in Northern Junggar Basin

作　　者：吴梦绮 王清 WU Mengqi;WANG Qing(School of Earth Science,East China University of Technology,330013,Nanchang,PRC)

机构地区：[1]东华理工大学地球科学学院,南昌330013

出　　处：《江西科学》2024年第2期297-302,共6页Jiangxi Science

摘　　要：以准噶尔盆地北部乌伦古坳陷含矿目的层红砾山组(K_(2)h)为主要研究对象,通过矿物学、地球化学和沉积环境体系等系统分析。结果表明,含矿目的层红砾山组砂岩主要为岩屑砂岩、岩屑长石砂岩和长石岩屑砂岩,少量落于长石砂岩和长石石英砂岩中;红砾山组(K_(2)h)下、中、上段沉积相分别为砾质辫状河沉积、砂质辫状河沉积和曲流河沉积;另外,研究区还原带中全铁含量最高,具较强的还原性,氧化带中发生明显的后生作用致使Fe^(3+)富集。In this study,the Honglishan Formation(K_(2)h)of the ore-bearing target layer in Ulungu Depression,northern Junggar Basin is the main research object,and it is analyzed systematically by mineralogy,geochemistry and sedimentary environment system.The results show that the sandstone of Honglishan formation in the ore-bearing target layer is mainly composed of lithic sandstone,lithic feldspar sandstone and feldspar lithic sandstone,and a small amount falls in the feldspar sandstone and feldspar quartz sandstone.The lower,middle and upper sedimentary facies of Honglishan Formation(K_(2)h)are gravelly braided river deposit,sandy braided river deposit and meander river deposit,respectively.In addition,the reduction zone of the study area has the highest total iron content and strong reducing property,and the obvious epigenetic process in the oxidation zone leads to the enrichment of Fe^(3+).

关 键 词：岩石学特征 地球化学特征 红砾山组 准噶尔北部 

分 类 号：P619.14[天文地球—矿床学]