摘要
钱家店铀矿是位于松辽盆地南部的复成因砂岩型铀矿,受表生淋滤、辉绿岩中低温热液和深部油气等多流体影响,目前铀矿物赋存状态尚有一定争议,铀在矿石内不同矿物中的配分尚不明确。为了进一步明确铀赋存状态和在不同矿物中的配分,计算钱家店矿石中不同矿物中铀的配分比例,本文运用岩矿鉴定、铀化学逐级提取、电子探针和激光剥蚀电感耦合等离子体质谱(LA-ICP-MS)微区原位分析技术开展综合测试分析。明确了钱家店铀矿物的赋存状态,认为钱家店铀矿物以吸附态为主,约占总铀含量的80%,结合态铀矿物或含铀矿物约占比20%。其中吸附态铀矿物主要富集在方解石等碳酸盐矿物中,占总铀含量的47.86%,其次是在黏土矿物中占17.94%,在铁锰氧化物矿物中占12.21%。独立铀矿物是与黄铁矿密切共生的沥青铀矿为主,约占铀总含量的9.07%,另有少量含钛铀矿物和铀石约占5.08%。这种矿石中各碎屑组分中铀的占比量化研究,为矿床地浸开采及资源量计算提供依据。
The Qianjiadian uranium deposit is a complex-metamorphic sandstone-type uranium mine located in the southern part of the Songliao Basin.To determine the state of uranium mineralization and its partitioning in different minerals,petrographic identification,uranium chemical step-by-step extraction,electron probe microanalysis and laser ablation inductively coupled plasma-mass spectrometry(LA-ICP-MS)were used.The results show that Qianjiadian uranium minerals are predominantly in adsorbed state,accounting for about 80%of the total uranium content,of which 47.86%is in carbonate minerals,such as calcite,17.94%in clay minerals,and 12.21%in iron and manganese oxides minerals.Combined or uranium-bearing minerals account for approximately 20%of the total uranium content,of which stand-alone uranium minerals are dominated by pitchblende uranium ore,which accounts for approximately 9.07%of the total uranium content,and a small amount of titanium-bearing uranium minerals and uraninite,which accounts for approximately 5.08%.
作者
刘明义
吴柏林
杨松林
郝欣
王苗
李琪
林周洋
张效瑞
LIU Mingyi;WU Bailin;YANG Songlin;HAO Xin;WANG Miao;LI Qi;LIN Zhouyang;ZHANG Xiaorui(State Key Laboratory of Continental Dynamics,Department of Geology,Northwest University,Xi’an 710069,China;Xi’an Center,China Geological Survey,Xi’an 710119,China;The Exploration and Development Research Institute of Liaohe Oilfield Branch Company,PetroChina,Panjin 124201,China)
出处
《岩矿测试》
CAS
CSCD
北大核心
2024年第2期224-233,共10页
Rock and Mineral Analysis
基金
国家重点研发计划项目(2023YFC2906702,2021YFE0190500,2021YFC2901802)
中国地质调查局地质调查项目(DD20230582)
中核铀业“揭榜挂帅”科技攻关项目(202302)。
关键词
铀赋存状态
原位
电子探针
激光剥蚀电感耦合等离子体质谱法
配分比例
钱家店铀矿
松辽盆地
occurrence state of uranium
in situ
electron probe microanalysis
laser ablation inductively coupled plasma-mass spectrometry(LA-ICP-MS)
distribution rate
Qianjiadian uranium deposit
Songliao Basin
作者简介
第一作者:刘明义,博士研究生,主要从事中亚地区矿产资源调查。E-mail:286147047@qq.com;通信作者:吴柏林,教授,博士,主要从事铀矿地质及盆地有机-无机矿产相互作用研究。E-mail:wbailin@126.com。
