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Trans. Nonferrous Met. Soc. China 24(2014) 509-513 Three-dimensional magnetotelluric regularized inversion based on smoothness-constrained model Xiao-zhong TONG1,2, Jian-xin LIU1, Rong-wen GUO1, Hai... resistivity structures is a focus problem in current magnetotelluric inversion. A stable solution of an ill-posed inverse problem was obtained by the regularization methods in which some desired......
, Central South University, Changsha 410083, China)Abstract:A variety of electromagnetic exploration methods, involving the wide field electromagnetic method, the audio magnetotelluric method (AMT) and the controlled source audio frequency magnetotelluric method (CSAMT), were carried out on a known geologic profile of a gold mine in Shandong Province, with the purpose of comparison in the real......
to extract the resistivity information of the Dongguashan mine in southeast China. Compared with the audio magnetotelluric (AMT) method, and the controlled source audio-frequency magnetotelluric (CSAMT...; anti-interference capability; Dongguashan copper deposit 1 Introduction The technologies based on the electromagnetic field with natural sources, such as the magnetotelluric (MT) method and the audio......
with incomplete LU decomposition preconditioning to two-dimensional magnetotelluric forward modeling LIU Jian-xin, JIANG Peng-fei, TONG Xiao-zhong, XU Ling-hua, XIE Wei, WANG Hao (School of Info...-dimensional magnetotelluric forward problem, no-uniform mesh based magnetotelluric responses calculation formula was derived. Based on the fact that the finite element method was used to form a linear......
黑龙江省鹿鸣钼矿地球物理特征及异常模型胡耀星,张冰中铁资源地质勘查有限公司摘 要:斑岩型铜钼矿床由于具有规模大,埋藏浅,易于开采的特点,成为铜,钼金属的主要来源,一直是地质找矿的主要方向,因此研究斑岩型铜,钼矿勘查找矿方法具有十分重要的意义.以鹿鸣钼矿(开展了详查和勘探工作的典型斑岩型矿床)为例,利用重磁,激电,高密度电阻率以及可控源音频大地电磁测深(Controlled Source Audi-frequency Magnetotelluric,CSAMT)等多种地球物理勘探方法,结合矿区矿体部位的矿床地质特征,系统分析了矿区物探异常特征,建立了矿区地质地球物理模型,并给出了寻找该类型矿床的地球物理勘查方法和实施步骤,为该地区以及类似地区的找矿工作提供参考.关键词:斑岩型钼矿;地球物理......
张量CSAMT法二维建模正演的应用实践林晓晖,张国鸿安徽省地球物理地球化学勘查技术院摘 要:可控源张量音频大地电磁法(Tensor controlled source audio-frequency magnetotelluric,TCSAMT)由于需要两个或两个以上的发射电偶极子,目前二维反演是基于天然场法原理,因此二维反演结果会含有一些不确定成分.结合某两个矿区实例,分别给出了TCSAMT二维建模正演结果,并与天然场法的二维反演结果进行了对比分析.研究表明:(1)依据地质勘探剖面建立地电断面的正演模型进行TCSAMT法二维视电阻率和阻抗相位正演,对于深部金属矿体均能获得低阻,高相位异常;(2)正演结果的视电阻率等值线断面图中深部矿体的异常特征与天然场法的二维反演结果较一致;(3)在目前TCSAMT......
云南省大马尖山矿区地质特征及深部综合找矿预测冯毅1,张志鹏1,彭宇朝21. 云南冶金资源股份有限公司2. 云南铜业矿产资源勘查开发有限公司摘 要:云南省大马尖山矿区位于唐古拉-昌都-兰坪-思茅褶皱系东南部的墨江-绿春褶皱带,昔务备-骑马坝-新寨背斜南翼,矿区经过多年开采,资源逐渐枯竭.为有效扩大矿区资源储量,延长矿山服务年限,在综合分析矿区地质特征以及地球物理,地球化学特征的基础上,在矿区分别进行了土壤地球化学测量,高精度磁法测量,激电中梯测量以及音频大地电磁法(Audio magnetotelluric method,AMT)测量,分别圈定了一系列异常.通过对各类异常进行综合解译推断,圈定了3处找矿靶区,钻探验证表明,靶区成矿潜力较好,与异常综合解译推断结果吻合性较高.关键词:资源危机......
于单一极化模式的反演,并证明双二次插值有限元法MT正演及最小二乘正则化反演算法的有效性与可行性.关键词:大地电磁;有限单元法;正演模拟;最小二乘正则化;联合反演Magnetotelluric finite element method forward based on biquadratic interpolation and least squares regularization joint..., Ministry of Education,Central South University, Changsha 410083, China)Abstract:Based on the boundary value problem of partial differential equation of the two-dimensional magnetotelluric (MT) forward......
; 文章编号:1672-7207(2014)10-3513-08 Magnetotelluric forward calculation by meshless method YAN Jiabin, LI Junjie (School of Geosciences and Info-Physics, Central South University, Changsha 410083, China) Abstract: The basic principles of the meshless method and its application to two-dimensional magnetotelluric forward were described, and calculation accuracy......
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