库捷尔太铀矿床八道湾组下段沉积相对铀成矿的控制

发布时间：2018-04-23 16:52

本文选题：八道湾 + 冲积扇　；参考：《中国矿业》2017年S2期

【摘要】：伊犁盆地南缘八道湾组下段有利的岩性-岩相是铀矿化沉淀富集基础,研究其特征为盆地其他地区八道湾组下段找矿提供依据。本文通过岩芯观研察、单井沉积相分析、二维连井剖面沉积相分析,结合砂-泥岩平面变化与层间氧化带展布特征,认为伊犁盆地南缘库捷尔太地区八道湾组下段为冲积扇沉积相类型。研究区内由南向北依次发育扇根、扇中及扇端亚相。依据钻孔数据统计分析,层间氧化带和工业铀矿化主要集中在八道湾组下段碎屑颗粒适中、分选性较好砂体中,指出扇中河道沉积是库捷尔太地区八道湾组砂岩型铀矿主要控矿沉积微相。
[Abstract]:The favorable lithology and lithofacies of the lower member of Badaowan formation in the southern margin of Yili Basin are the basis of uranium mineralization and accumulation. The study of its characteristics provides a basis for prospecting in the lower member of Badaowan formation in other areas of the basin. In this paper, through core observation, single well sedimentary facies analysis, two-dimensional continuous well profile sedimentary facies analysis, combined with sand mudstone plane change and interlayer oxidation zone distribution characteristics, It is considered that the lower member of Badaowan formation in Kuteertai area on the southern margin of Yili basin is alluvial fan sedimentary facies. Fan roots, fan mesophase and fan terminal subfacies were developed from south to north in the study area. According to the statistical analysis of borehole data, the interlayer oxidation zone and industrial uranium mineralization are mainly concentrated in the middle detrital grains of the lower member of Badaowan formation and in the sand bodies with good sorting property. It is pointed out that the channel deposits in fan are the main sedimentary microfacies of Badaowan sandstone-type uranium deposit in Kudaowan area.
【作者单位】：核工业二一六大队;
【基金】：中国核工业地质局“新疆伊犁盆地南缘砂岩型铀矿资源调查评价与勘查”项目资助(编号:201608) 国家自然科学基金联合基金“天山造山带中-新生代再造过程与砂岩型铀矿成矿作用”项目资助(编号:U1403292)
【分类号】：P619.14

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