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青海省东昆仑八宝山地区砂岩型铀矿成矿条件及成矿潜力研究 被引量:2

Study on the metallogenic conditions and potential of sandstone-type uranium deposits in Babaoshan area in East Kunlun of Qinghai province
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摘要 为明确青藏高原北部东昆仑八宝山地区砂岩型铀矿成矿潜力,基于砂岩型铀矿成矿理论,以晚三叠世八宝山组为目标地层,通过地质调查、化学样品分析等方法,研究了砂岩型铀矿5个重要成矿地质条件(铀源条件、古气候条件、岩性岩相条件、水文地质条件、构造条件)结果显示:研究区铀源丰富;成矿时期的气候处于干湿交替的阶段;赋矿岩性中的“泥-砂-泥”结构稳定;“补-径-排”水动力系统发育完善;辫状河相、三角洲相广泛分布;盆地边缘缓倾斜坡带特征明显。结合岩石地球化学特征及已有成矿事实表明,东昆仑八宝山地区砂岩型铀矿成矿地质条件较好、找矿潜力较大。 In order to clarify the metallogenic potential of sandstone-type uranium deposits in Babaoshan area,East Kunlun in Northern Qinghai-Tibet Plateau,based on the metallogenic theory of sandstone-type uranium deposits,Babaoshan formation in Late Triassic is taken as the research target in this paper to study five important metallogenic geological conditions(uranium source,paleoclimate,lithology and lithofacies,hydrogeology and structure)of sandstone-type uranium deposits through geological survey and chemical sample analysis.The results show that there are abundant uranium sources in the study area;the climate of mineralization period is in the alternation of drying and wetting;the structure of“mud-sand-mud”is stable in ore bearing lithology;the hydrodynamic system of“replenishment-runoff-discharge”is perfect;braided river facies and delta facies are widely distributed in the study area;the characteristics of gently inclined slope zone in the basin margin are obvious.According to the geochemical characteristics of rocks and the existing mineralization,the geological conditions of sandstone-type uranium deposits in Babaoshan area in East Kunlun are good with great prospecting potential.
作者 晁海德 徐永锋 李生福 赵洪岳 蔡廷俊 叶积龙 CHAO Haide;XU Yongfeng;LI Shengfu;ZHAO Hongyue;CAI Tingjun;YE Jilong(Qinghai Fourth Geological Exploration Institute,Xining 810029,China;Qinghai Key Laboratory of Shale Gas Resources,Xining 810001,China)
出处 《青海大学学报》 2021年第3期93-100,共8页 Journal of Qinghai University
基金 青海省地质矿产勘查开发局地质勘查项目(青地矿科[2020]61)。
关键词 东昆仑 砂岩型铀矿 成矿地质条件 成矿潜力 East Kunlun sandstone-type uranium deposits metallogenic geological condition metallogenic potential
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