| 松辽盆地东北缘晚白垩世地层结构、沉积充填及铀矿找矿方向 |
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| 引用本文： | 邢作昌,秦明宽,李研,郭强,张杨,贾立城,肖菁.松辽盆地东北缘晚白垩世地层结构、沉积充填及铀矿找矿方向[J].中国地质,2021,48(4):1225-1238. |
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| 作者姓名： | 邢作昌 秦明宽 李研 郭强 张杨 贾立城 肖菁 |
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| 作者单位： | 核工业北京地质研究院, 北京 100029;中核集团铀资源勘查与评价技术重点实验室, 北京 100029;核工业二四〇研究所, 辽宁 沈阳 110032 |
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| 基金项目： | 国防科工局松辽盆地核能开发项目（2017-1403）、核工业北京地质研究院院长青年科技创新基金（地QJ2003）和重点铀成矿区带资源潜力动态评价（2019-44-05）联合资助。 |
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| 摘 要： | 松辽盆地北部铀矿地质研究相对薄弱。本文利用岩心、测井资料,综合运用沉积学、盆地分析、砂岩型铀矿成矿理论,对松辽盆地东北隆起区内的沉积建造特征进行了系统梳理:(1)理清了松辽盆地东北隆起区盆缘的地层结构及含铀含氧水渗入窗口的时空分布特征,绥棱以北嫩江组以下地层整体为超覆结构,仅海伦隆起泉头组在盆缘具有削蚀结构从而具备渗入窗口;而绥棱以南的晚白垩世地层整体在盆缘都呈削蚀结构,均具备窗口。(2)研究区可识别出冲积扇、扇三角洲、曲流河、辫状河、三角洲、滩坝及半深湖—深湖相这7种沉积相类型;在海伦隆起、绥棱背斜、庆安隆起等不同构造单元具有不同的沉积充填样式。(3)探讨了松辽盆地东北隆起区砂岩型铀矿的主攻层位、找矿类型及找矿方向:庆安地区泉头组冲积扇扇中辫状河河道砂体是最有利的勘探对象,其次是铁力地区姚家组的扇三角洲砂体和海伦地区泉头组的辫状河河道砂体,最后是绥棱地区嫩一段的三角洲前缘砂体。该研究可为松辽盆地东北隆起区铀矿勘查突破提供新的找矿思路。
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| 关 键 词： | 地层结构 沉积充填 找矿方向 砂岩型铀矿 地质调查工程 东北隆起区 松辽盆地 |
| 收稿时间： | 2020/6/7 0:00:00 |
| 修稿时间： | 2020/8/15 0:00:00 |
Stratigraphic architecture, sedimentary filling and uranium prospecting of Upper Cretaceous strata, northeastern Songliao Basin |
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| XING Zuochang,QIN Mingkuan,LI Yan,GUO Qiang,ZHANG Yang,JIA Licheng,XIAO Jing.Stratigraphic architecture, sedimentary filling and uranium prospecting of Upper Cretaceous strata, northeastern Songliao Basin[J].Chinese Geology,2021,48(4):1225-1238. |
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| Authors: | XING Zuochang QIN Mingkuan LI Yan GUO Qiang ZHANG Yang JIA Licheng XIAO Jing |
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| Institution: | Beijing Research Institute of Uranium Geology, Beijing 100029, China;Key Laboratory of Uranium Resources Prospection and Evaluation Technology, CNNC, Beijing 100029, China;Research Institute No. 240, CNNC, Shenyang 110032, Liaoning, China |
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| Abstract: | The research on uranium geology in the northern Songliao Basin is relatively weak. Based on the sedimentology, basin analysis and sandstone-type metallogenic theories, the characteristics of sedimentary formation in the Northeast Uplift Zone (NUZ), Songliao Basin, is systematically researched by means of core and well logging. Firstly, the stratigraphic architecture of NUZ and the temporal-spatial distribution of infiltration window for oxygen water with dissolved uranium are clarified. The strata below Nenjiang Formation on the north of Suiling City are overlap structure. Only the Quantou Formation in Hailun Uplift has a truncated-structure at the basin margin, so it has an infiltration window. In contrast, the late Cretaceous strata on the south of Suiling City are all truncated-structure, so all late Cretaceous strata have infiltration windows. Secondly, seven sedimentary facies, including alluvial fan, fan delta, meandering river, braided river, delta, beach bar and semi-deep to deep lake facies, can be recognized. There are different sedimentary filling patterns among Hailun Uplift, Suiling Anticline and Qing''an Uplift. Thirdly, the main exploration formation, prospecting type and prospecting direction of sandstone-hosted uranium deposits in NUZ, Songliao basin, are discussed as follows. The braided channel sand body in the alluvial fan of Quantou Formation in Qing''an area is the most favorable exploration object, followed by the fan delta sand body of Yaojia Formation in Tieli area and the braided channel sand body of Quantou Formation in Hailun area, and finally the delta front sand body of the first Member of Nenjing Formation in Suiling area. This study can provide a new idea for the progress of uranium exploration in NUZ. |
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| Keywords: | stratigraphic architecture sedimentary filling uranium prospecting direction sandstone type uranium deposits geological survey engineering Northeastern Uplift Zone Songliao Basin |
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