摘要
氧化流体是砂岩型铀矿形成的关键条件,而沉积的非均质性是控制氧化带和铀矿体空间分布的重要因素,因此,查明制约氧化带发育的砂体参数,对铀矿勘查至关重要。为系统查明氧化带发育的控制因素,选择洪海沟西地区山窑组上段为研究对象,通过大量钻孔资料的统计分析,采用聚类分析和相关性分析,提取影响氧化带和铀矿体空间分布的关键因子,并结合成矿条件和平面图件编制,探讨氧化带和铀矿化空间定位的影响机制。结果表明:洪海沟矿床西山窑组上段主河道砂体厚度稳定连通性好,砂体厚度和砂体比两个参数与氧化流体的大规模发育相关性最好;在铀矿化钻孔中,砂体与高含砂率和较大的夹隔层厚度均有较密切的相关性;砂体的均质性和非均质性则直接决定着铀矿体的空间定位,均质性较高的厚大砂体控制着氧化带的发育,围绕其边缘的非均质性砂体则直接定位铀矿体的产出。研究结果对砂岩型铀矿氧化带的探索和矿体定位预测具有重要的指导意义,将为该地区砂岩型铀矿的精细化勘查提供依据和支持。
The oxidizing fluid is the core factor for the formation of sandstone type uranium deposit,and the heterogeneity of sedimentation is an important factor controlling the spatial distribution of oxidation zone and uranium ore body.Therefore,it is very important for uranium exploration to find out the sand body parameters restricting the development of oxidation zone.In order to systematically find out the controlling factors of oxidation zone development,the upper member of Xishanyao Formation in Honghaigou area was selected for research.Based on the statistical analysis of a large number of borehole data,the key factors of spatial distribution of oxidation zone and uranium ore body were studied through cluster analysis and correlation analysis.Combined with the metallogenic conditions and the compilation of plane maps,the influence mechanism of oxidation zone and uranium mineralization spatial location was discussed.The results show that the sand body thickness of the main channel in the upper segment of Xishanyao Formation of the Honghaigou deposit is stable and has good connectivity,and the parameters of sand body thickness and sand body ratio have the best correlation with the large-scale development of oxidizing fluid.In uranium mineralized boreholes,sand bodies are closely related to high sand content and large interlayer thickness.And the thickness and heterogeneity of sand body directly determine the spatial location of uranium ore body.The development of oxidation zone is controlled by thick and large sand body with high homogeneity,and the heterogeneous sand body around its edge directly locates the output of uranium ore body.The research results have important guiding significance for the exploration of oxidation zone and ore body positioning prediction of sandstone type uranium deposits,and provide basis and support for the fine exploration of sandstone type uranium deposits in this area.
作者
邓薇
叶腾飞
张成勇
DENG Wei;YE Teng-fei;ZHANG Cheng-yong(Jiangxi Engineering Laboratory on Radioactive Geoscience and Big Data Technology, East China University of Technology, Nanchang 330013, China;Fundamental Science on Radioactive Geology and Exploration Technology Laboratory, East China Institute of Technology, Nanchang 330013, China)
出处
《科学技术与工程》
北大核心
2021年第36期15365-15371,共7页
Science Technology and Engineering
基金
国家自然科学基金(42062008)
东华理工大学江西省放射性地学大数据技术工程实验室开放基金(JELRGBDT202104)。
关键词
砂岩型铀矿
聚类分析
氧化带
铀矿体定位
伊犁盆地
sandstone type uranium deposit
cluster analysis
oxidation zone
uranium ore body location
Yili Basin
