| 甘肃省龙首山芨岭铀矿床成矿热液流体特征研究 |
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| 关键词:Longshou Mountain Jiling uranium deposit component migration calcite vein fluid inclusion mineralizing mechanism |
| 基金项目:中国核工业地质局项目(编号: 201349; 201571);中国地质调查局中国矿产地质与成矿规律综合集成;服务(矿产地质志)项目(编号: DD20160346);中国地质调查局地质调查项目(编号: 12120114014901) |
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| A Study of Mineralizing Hydrothermal Fluid Characteristics of the Jiling Uranium Deposit in the Longshou Mountain, Gansu Province |
| The Jiling uranium deposit is the most typical Na-metasomatic uranium deposit in North China. In this paper, the authors studied the geochemical characteristics of ore-bearing altered diorite, near-ore altered diorite, distal altered diorite and diorite, calculated component migration, fluid inclusions characteristics, homogenization temperatures, salinity, and made Raman analysis of light pink calcite vein in drill hole ZKJ9-4. The results show that the hydrothermal fluid is rebalance water from evolved magma, which has rich U in the forms of [UO2(CO3)2]2– and [UO2(CO3)3]4–, together with abundant SiO2, Na+, Ca2+, Mg2+, Fe2+, Mn2+, ∑REE, U, Th, Ga, Sr, Zr, Ba, Rb, Nb, Mo, Cd, Sn, Hf, Ti, Ta, CO2, H2S, CH4, and some other components. The temperature of ore-forming fluid is (300±20) ℃, the salinity is 2.99 wt%~4.57 wt% NaCl, and the density is 0.75~0.77 g/cm3. Fluid boiling was the ore-forming mechanism of early period hydrothermal fluid, while late period fluid was mixed with meteoric water, and the fluid mixing further promoted U unloading. |
| ZHAO Ru-yi,WANG Bo,CHEN Yu-chuan,WANG Gang,CHEN Yun-jie,NIE Li,LI Tao.2018.A Study of Mineralizing Hydrothermal Fluid Characteristics of the Jiling Uranium Deposit in the Longshou Mountain, Gansu Province[J].Acta Geoscientica Sinica,39(3):282-294. |
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