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1、摘要激发极化法是我国金属矿电法勘探的主要手段，而中梯激电作为普遍采用的物探方法被广泛应用于寻找金属矿床、解决水文地质和工程地质的问题之中。本文以中梯装置椭球异常体的激电异常理论为基础，针对野外地质体形态多样的特点，采用坐标旋转、椭圆积分等技术手段推导了水平大地均匀场小任意形态椭球体视极化率和视电阻率解析计算算法，算例屮给出了几类典型椭球体的不同主剖而的视电阻率和视极化率杲常，以及视电阻率和视极化率的最大或最小值随椭球体轴2、电阻率、极化率的变化.得到以下儿条结论：1.椭球体视极化率异常是围岩电阻率及极
2、化率，椭球体电阻率、极化率及埋深，屯场方向与椭球体空间相互位置的复合函数，具有较复朵的关系。模型计算及研究表明，低阻高极化体较高阻高极化体异常人。当椭球体得电阻率很高吋，激电异常很弱,几乎观测不到。2、通过改变椭球体参数，模拟分析了二维脉状体与三维椭球体的异常变化规律,研究结果表明，椭球体的长轴与两短轴的平均值Z比大于20时，该三维椭球体可看做二维脉状休。关键词：激发极化，中间梯度法，椭球体，视极化率曲线ABSTRACTInducedpolarizationmethodisamajormeansofe
3、lectricedprospectingofmetallicoredepositsinChina,andtheladderIPasacommonusedingeophysicalprospectingmethodsarewidelyusedinlookingformetaldeposits,solvetheproblemofhydrogeologyandengineeringgeology.BasedonellipsoidladderdeviceintheabnormalbodyoftheIPanom
4、alytheoryasthefoundation,accordingtothecharacteristicsofthefieldgeologicalformvariety,usingcoordinaterotationandellipticintegraltechnologylevelwasdeducedtheearthellipsoidhomogeneousfieldofarbitraryformdependingonthepolarizationratioandapparentresistivit
5、yanalyticcalculationalgorithm,numericalexamplesaregivenintheseveralkindoftypicalellipsoidofdifferentmainsectionofapparentresistivityandapparentchargeabilityanomalies,aswellasapparentresistivityandapparentchargeabilityofthemaximumorminimumvaluewithellips
6、oidaxiallength,thechangeofresistivityandchargeability.Getthefollowingconclusion:1.El1ipsoidisapparentchargeabilityanomaliessurroundingrockresistivityandchargeability,el1ipsoidresistivity，polarizabi1ity,andburieddepth,theelectricfielddirectionandspheroid
7、spacelocationofthecompoundfunctionmutually,hasacompliedtedrclationship.Modelcalculationandstudy,lowresistanceandhighpolarizationanomaliesofhighresistancehighpolarizationbody.Whenel1ipsoidtoresistivityisveryhigh,theTPanomaliesisveryweak,almostcannotdetec
8、t.2,bychangingthepareimetersofellipsoid,thesimulationanalysisofthetwo-dimensionalveinbodywiththecxccptionofthree-dimensionalspheroidchangelawoftheresearchresultsshowthattheaxisoftheellipsoidwithtwoshortaxisratiooftheaverageofmore
