柴达木盆地马海盐湖深层富钾卤水电性结构特征及其赋存规律研究  

The Electrical Structure Characteristics and Occurrence Patterns of Deep Potassium Rich Brine in the Mahai Salt Lake,Qaidam Basin

作　　者：何胜 苏世杰 武超峰 HE Sheng;SU Shijie;WU Chaofeng(Xining Center of Natural Resources Comprehensive Survey,CGS,Xining 810021,China;East China University of Technology,Nanchang 330013,China;Qinghai Bureau of Environmental Geology Exploration,Xining 810008,China;Qinghai Provincial Key Laboratory of Environmental Geology,Xining 810008,China;Qinghai No.906 Engineering Survey and Design Institute,Xining 810007,China)

机构地区：[1]中国地质调查局西宁自然资源综合调查中心,青海西宁810021 [2]东华理工大学,江西南昌330013 [3]青海省环境地质勘查局,青海西宁810008 [4]青海省环境地质重点实验室,青海西宁810008 [5]青海九零六工程勘察设计院有限责任公司,青海西宁810007

出　　处：《东华理工大学学报(自然科学版)》2025年第2期155-165,共11页Journal of East China University of Technology(Natural Science)

基　　金：中国地质调查局地质调查项目(DD20230389);青海九零六工程勘察设计院有限责任公司科技项目(青勘院字〔2023〕18号)。

摘　　要：柴达木盆地马海盐湖深层卤水资源储量丰富,但由于相带差异,导致储卤层非均质性及各向异性明显。为准确获取深层富钾卤水的分布特征和赋存规律,采用大地电磁法对马海盐湖富卤地区进行了探测。结果表明,马海盐湖深部富卤地层与非卤地层具有明显的电阻率差异,0.8Ω·m可作为富卤层位与非卤层位的区分标志;马海地区高矿化度卤水多分布在高程2600~1600 m的细砂、粉细砂、粗砂、砾砂互层中,过渡层为泥质砾砂、含黏土的粉砂,含水层顶板及隔水层为黏土,深部新近系砂质泥岩中无深层卤水赋存;研究区的深层卤水为松散岩类承压孔隙水,主要分布在研究区西部,呈东西向分布于第四系中、下更新统的冲洪积相沉积层中。The deep brine resources of Mahai Salt Lake in the Qaidam Basin are abundant.Due to differences in facies zones,the heterogeneity and anisotropy of the brine reservoirs are significant.In order to accurately obtain the distribution characteristics and occurrence patterns of deep brine,the magnetotelluric method was used to explore the rich brine area of the Mahai Salt Lake.The results indicate that there is a significant difference in electrical resistivity between the deep brine-rich and non-brine layers in the Mahai Salt Lake,with 0.8Ω·m serving as a distinguishing indicator between the brine-rich and non-brine layers.The highly mineralized brine in the Mahai area is mainly distributed in the interbedded layers of fine sand,coarse sand,and gravel sand at elevations of 2600~1600 m.The transition layer is composed of muddy gravelly sand and clay-bearing silt,while the aquifer roof and aquitard are composed of clay.There is no deep brine occurrence in the deep Neogene sandy mudstone.The deep brine in the study area is the pressurized pore water of loose rocks,mainly distributed in the western part of the study area,in an east-west direction in the alluvial sedimentary layers of the Quaternary.

关 键 词：电性结构 深层卤水 大地电磁法 马海盐湖 

分 类 号：P631.3[天文地球—地质矿产勘探] P619.21[天文地球—地质学]