准噶尔盆地顶山地区乌伦古河组古气候特征及其对铀成矿的影响  

Sedimentary Environment and Its Effect on Uranium Mine of Wulunguhe Formation in Dingshan Area,Junggar Basin

作　　者：陈婷[1] 张建军 王帅成[4] CHEN Ting;ZHANG Jian-jun;WANG Shuai-cheng(141 Team,Sichuan Coalfield Geological Bureau,Deyang 618000,China;Chengdu Geological Survey Center,Chengdu 610081,China;Chinese Academy of Geologecal Sciences,Beijing 100037,China;Deyang Bureau of Land and Resources,Deyang 618000,China)

机构地区：[1]四川省煤田地质局141队,德阳618000 [2]成都地质调查中心,成都610081 [3]中国地质科学院,北京100037 [4]德阳市国土资源局,德阳618000

出　　处：《科学技术与工程》2018年第20期33-40,共8页Science Technology and Engineering

基　　金：中国地质调查局项目(DD20160201)资助

摘　　要：准噶尔盆地顶山地区乌伦古河组发现有砂岩型铀矿化显示,为了满足砂岩型铀矿进一步勘察的需要,利用沉积岩微量元素特征对乌伦古河组古气候特征进行探讨。结果表明:乌伦古河组碎屑沉积岩为淡水沉积,古气候为干旱炎热环境,沉积水体总体为氧化-还原环境,部分过渡为氧化环境。乌伦古河组碎屑沉积岩为干旱-氧化环境下形成,不利于有机质的保存,地层还原容量差,是制约铀成矿的重要因素之一。乌伦古河组铀矿化均位于第二岩性段下部,推测与地层有机质含量较高,且沉积期后古气候由氧化-还原环境转化为氧化环境密切相关。The sandstone-type uranium deposits were discovered in the Wulunguhe Formation of Dingshan area,Junggar Basin.Major trace and rare earth elements were examined to understand the mechanization of the sandstone-type uranium deposits.The results showed that the paleoclimatewas hot and dry conditions and the type of water was fresh water,the paleoenvironment was mostly oxidation-reducing environment,partly oxidation environment.The dry and oxidation environment which were short of organic matters has significant influence on the sandstone uranium deposit.The uranium mineralization of the Wulunguhe Formation is located in the lower part of the second lithology.It is presumed that it is closely related to the high organic matter content of the strata and the change of the paleoclimate from the oxidation-reduction environment to the oxidation environment after the depositional period.

关 键 词：准噶尔盆地 顶山地区 元素地球化学 环境意义 

分 类 号：P595[天文地球—地球化学]