文章摘要
肖 俊.陕西华阳川铀多金属矿床矿石特征及铀的赋存状态[J].地质与勘探,2019,55(2):496-507
陕西华阳川铀多金属矿床矿石特征及铀的赋存状态
Ore characteristics and occurrence state of uranium in the Huayangchuan uranium polymetallic deposit, Shaanxi Province
投稿时间:2018-07-27  修订日期:2019-02-21
DOI:10.12134/j.dzykt.2019.02.005
中文关键词: 铀多金属矿床 矿石特征 铀矿物 赋存状态 工艺矿物学
英文关键词: uranium polymetallic deposit, ore feature, uranium mineral, occurrence state, process mineralogy
基金项目:国家自然科学基金项目(编号:41762016)和核工业北京化工冶金研究科研项目(编号:GF2016000004)资助
作者单位E-mail
肖 俊 东华理工大学核资源与环境国家重点实验室江西南昌 东华理工大学地球科学学院江西南昌 lcdong2000@ 163.com 
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中文摘要:
      华阳川矿床位于秦岭造山带后陆冲段褶皱带的小秦岭成矿带内,是国内外成矿类型特殊的大规模的铀多金属矿床。为了深入了解陕西华阳川铀多金属矿床矿石组成和铀的赋存状态,本文通过采用光学显微镜、扫描电子显微镜、电子探针等现代分析测试方法,对华阳川铀多金属矿床进行了系统的工艺矿物学研究。测试结果显示:(1)主要的铀矿物为贝塔石、晶质铀矿和少量的铀钍石,与长白矿、褐帘石、榍石、磷灰石等相共生。(2)铌钛铀矿多呈自形-半自形粒状结构嵌入在钾长石与方解石内或其裂隙中,粒度主要集中在0.04~0.64mm,占总量的 57.58%。(3)铀主要以独立铀矿物(贝塔石、晶质铀矿)的形式存在,其中铀赋存于贝塔石与晶质铀矿中,占比分别为78.20%和15.02%,其余的铀可能以类质同象或吸附的形式存在。
英文摘要:
      The Huayangchuan deposit is located in the Little Qinling metallogenic belt of the Houluchong fold belt in the Qinling orogenic belt. It is a special large-scale uranium polymetallic deposit in China and elsewhere in the world. The objective of this work is further understanding composition and occurrence of uranium in this deposit. Modern analysis tools have been employed to perform tests on samples, such as optical microscopy, scanning electron microscopy and electron probe. The test results show that (1) the main uranium minerals are betafite, uraninite and a small amount of uranothorite, which are symbiotic with Changbai ore, allanite, titannite and apatite. (2)The betafite is mostly automorphic-hypautomorpuic granular embedded in potassium microcline and calcite or its fissures. The particle size concentrates in 0.04mm~0.64mm, accounting for 57.58% of the total. (3) Uranium mainly exists in the form of independent uranium minerals ( betafite, uraninite), in which uranium is present in the betafite and uraninite, accounting for 78.20% and 15.02%, respectively. The remaining uranium may be present in the form of isomorphism or adsorption.
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