ELECTRICAL CHARACTERISTICS OF THE HEFEI BASIN
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摘要: 合肥盆地的电性资料反映:a)盆地盖层电阻率总体较低,E、K为低阻层,侏罗系为相对高阻层;b)基底电性差异较大,上古生界为低阻电性层,且在盆地南部广泛发育,下古生界为相对高阻层,元古界等古老地层为高阻层;c)盆地经过印支期、燕山期等多次南北向挤压、拉张运动形成近东西向展布的隆凹相间的构造体系,在喜山期随着郯庐断裂带的活动形成北东向构造带;d)舒城断裂附近为大别地块和华北地台的结合地带,华北地台向大别地块之下俯冲;e)在盆地南侧推覆体之下可能掩盖着上古生界沉积盆地,这可能在油气勘探中有重要的地质意义。Abstract: The electrical data of the Hefei Basin revealed that a) the caprock resistivity of the basin is lower on the whole, E and K are low-resistance strata, and the Jurassic is relative high-resistance strata; b) the electrical properties of basements are greatly different: the Upper Paleozoic which is widely developed in the southern part of the basin is low-resistance strata,the Lower Paleozoic is relative high-resistance strata, and the Proterozoic and other old strata are high-resistance strata; c) a near-WE distributed and uplift-depression alternated structural system was formed in the basin through many times of NS compression and extension during the Indosinian and Yanshanian periods, and a EN structural zone was developed in the Himalayan period along with the activation of the Tanlu Faulted Belt; d) near the Shucheng Fault is the conjoint belt of the Dabie Block and the North China Platform with the North China Platform subducting under the Dabie Block; e) the Upper Paleozoic sedimentary basin which might be covered under the nappe on the southern side of the basin may be of important geological significance in the oil and gas exploration.
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[1] 安徽省地质矿产局.安徽区域地质志[M].北京:地质出版社,1987.112-114. [2] 吴奇之,王同和.中国油气盆地构造演化与油气聚集[M].北京:石油工业出版社,1999.196-198. [3] 薛爱民,金维俊.合肥盆地油气地质及其与大别造山带构造耦合[M].北京:石油工业出版社,2000.98-102. -
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