التفاصيل البيبلوغرافية
| العنوان: |
松辽盆地南部青山口组沉积充填与铀矿找矿方向. (Chinese) |
| Alternate Title: |
Sedimentary Evolution and Uranium Prospecting Direction of Qingshankou Formation in Southern Songliao Basin. (English) |
| المؤلفون: |
肖菁, 郭强, 秦明宽, 蔡煜琦, 宁君, 刘鑫, 严张磊, 刘梦魁 |
| المصدر: |
Uranium Geology; 2024, Vol. 40 Issue 4, p603-618, 16p |
| Abstract (English): |
As the prospecting space in the Qianjiadian mine and the peripheral uranium ore belt is getting smaller and smaller, the new area and new horizon become the the urgent need for uranium exploration in the southern Songliao Basin. And the Qingshankou Formation was systematically re-recognized. Based on the core, logging and production dynamic data of a large number of boreholes, the top and bottom interfaces of the Qingshankou Formation in the region were first redefined. Based on the achievement of accurate stratification, the stratigraphic filling, provenance system, the sedimentary facies and sand body distribution characteristics were systematically studied, so as to further explore the ore-bearing characteristics of the Qingshankou Formation, the relationship between sedimentary evolution and uranium mineralization. The results showed that: (1) Affected by the structure of the depression basin and the central Jiamatu uplift, the thickness of the Qingshankou Formation in the southern part of the study area varies greatly, showing a concave-uplift pattern, which is characterized by eastern uplift and denudation-central subsidence-western uplift loss. (2) There were three provenance systems. The main provenance was the Kangping-Faku area on the southern margin of the basin. From south to north, it showed an alluvial fanriver-delta-lake sedimentary system, and the sedimentary pattern of South Hebei Island was bounded by the central paleouplift. (3) The sand bodies were mainly developed in the Kailu depression in the southwest, and the channel was of the characteristics of converging to the saddle of the central paleo-uplift. The area where the water flow converged was the development site of the favorable gray ore-forming sand body. Based on this, the metallogenic genesis of the water-blocking and sand-accumulating in the paleo-uplift was proposed. Finally, according to the research results, two suggestions were put forward for the prospecting direction of uranium deposits in the study area: (1) The newly added Qingshankou Formation is the primary target layer in the study area, and the prediction of ore-bearing sand bodies follows the law of continuous upward movement from south to north. (2)The paleo-uplift saddle-shaped valley pattern catchment, channel sand body superposition site and end sedimentary phase change site, paleo-uplift and depression connection site were believed the prospecting direction of sandstone-type uranium deposits. This study improved the basic geological research level in this area, and provided reference for expanding the prospecting space. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
随着钱家店矿区及外围铀矿带内的找矿空间越来越小, 目前铀矿勘查工作对松辽盆地南部新区、新层位 的找矿需求越来越大。为重新系统认识松辽盆地南部区域上的青山口组, 文章通过大量钻孔岩心、测井资料, 结合地 质背景及前人研究成果, 对松辽盆地南部青山口组的沉积充填特征进行了阐述, 认为: 研究区青山口组受坳陷盆地结 构及中部架玛吐隆起的影响, 区域上地层厚度变化较大, 呈现凹隆相间的格局, 整体表现为“中间薄、南北两侧厚; 东部厚、西部整体缺失”的充填特征; 研究区由南到北青山口组表现为冲积扇-河流-三角洲-湖泊的沉积体系, 且以 古隆起为界构成“南河北洲”的沉积格局; 砂体主要发育于西南部开鲁坳陷内, 且河道存在向中部古隆起、“鞍部” 汇聚的特点, 水流汇聚的区域即为目前有利灰色成矿砂体的发育部位。在此基础上, 运用沉积学及砂岩型铀成矿理论 对研究区铀矿找矿方向提出了两点建议: 新增青山口组为研究区主攻目标层位, 且其赋矿段具有由南往北不断上移的 变化规律; 将河流相河道汇水-砂体叠置部位及末端沉积相变部位、古隆起和凹陷的衔接部位、具古隆起 “鞍状沟谷” 格局汇水地貌特征的部位作为研究区砂岩型铀矿找矿方向。本研究首次全面系统地阐述了松辽盆地南部青山口组的沉 积充填特征, 完善了该地区基础地质理论研究, 同时对扩大研究区找矿空间, 有效支持科研生产具有指导意义。 [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
