【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。更多还原

【Abstract】 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 approximately20% 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%.更多还原