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  magnetotelluric
Deep structure of Western Yakutia from magnetotelluric soundings
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Comparative analysis of hypotheses of the geoelectric structure of the Transcaucasian region from magnetotelluric data
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Various hypotheses of the geoelectric structure of the Transcaucasian region reflecting a priori geological and geophysical information and data from profile magnetotelluric (MT) soundings are analyzed.
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The effect of screening of the magnetotelluric field by high resistivity layers: Three-dimensional numerical modeling constraint
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Monitoring of relative changes in the electrical conductivity of rocks from observations of the magnetotelluric apparent resisti
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  mt
Moreover, we establish a fundamental relation between finding the numbers KS, MS and the numbers KT, MT where T = {2, 3, .
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In particular, we show that MT = 2KS (2KS - 1)-1,KT = 1/2 MS(MS - 1)-1 and that MT (1 - KT) = 1,KSKT = 1/2 , whenever MS (1 - KS) = 1.
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In order to explore the release of nutrients and the effects of global warming on the decomposition rate of forest litter, an experiment is designed to reciprocally decompose forest foliar litter in two sites across climatic zones: Mt.
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Jianfengling in Hainan Province in the tropics and Mt.
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The return amount of N, P and C will increase by 32.42, 1.033 and 741.1 kg/hm2, respectively in Mt.
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  magnetotelluric method
Magnetotelluric method is widely applied to study the Russian part of the East-European Craton, as well as the Caucasus and the Urals: several thousand soundings were performed during the last few years.
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In particular, it was shown that electromagnetic probing of the Earth using the classical Cagniard-Tikhonov magnetotelluric method is impossible with daytime recordings made at dip latitude stations.
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In recent years, the number of publications dealing with the mathematical and physical 3-D aspects of the magnetotelluric method has increased drastically.
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The review shows that the magnetotelluric method has been used, and is being used, in all kinds of environments and for many different processes shaping the crust and lithosphere.
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The use of laboratory measurements of electric resistivity of rocks for evaluating the magnetotelluric method
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  其他



         Based on the principle described before, the authors propose a new rapid 2 - D MT inversion method. Under the suitable modeling grid, it erases efficiently the excessive structure and the overf of data in the 2 - D approximate inversion by minimizing the square of the first der-ivative of the longitudinal and lateral model. Meanwhile, it introduces the whole controlling function and calculates Lagronia factor by Newton's method for the single solution, which ena-bles the inversion to converge quickly and st...
            在已有原理的基础上,本文给出了一种新的大地电磁二维快速反演方法。该方法在合理的模型网格下,求模型的纵向和横向一阶偏导数平方最小,反演得到最平滑模型,有效地消除了二维近似反演中易出现的多余构造和数据过拟合现象。同时,引入总体控制函数以及用牛顿单变量寻根法求拉格朗日因子,使反演快速、稳定地收敛。理论模型试算表明,该方法比近年来发展的同类反演方法效果更好。另外,野外资料的反演也取得了比较满意的结果。
文摘来源
         A profile of magnetotelluric sounding is presented in this paper, which travels from Yecheng, Xinjiang province to Shiquanhe, Tibet. The profile crosses the Kunlun Mountains and Karakorun Mountains from the Tarim basin to the western Gandisi. The total length of the profile is more than 800 km.The results of the investigation show that there are two low resistive layers in the crust (LRLC) in some area under the profile, but only one in other area. The buried depth of the first LRLC ranges from 10 km to 35...
            本文简介从新疆叶城至西藏狮泉河的大地电磁测深剖面.它北起塔里木盆地,横跨昆仑山脉和喀喇昆仑山脉地区到冈底斯西段,全长800余公里.探测结果表明,不同测点的地壳内部有的有两个低阻层,有的则只有一个低阻层,壳内第1低阻层的埋藏深度约10-35km,第2低阻层的埋藏深度约30-65km。在南昆仑缝合带以南,壳内低阻层的埋藏深度有从南向北不断加深的趋势;而在其以北的壳内低阻层的埋藏深度则与此相反.上地幔第1低阻层的埋藏深度约在100-150km之间,第2低阻层的埋藏深度约在350-550km之间.
文摘来源
         The development of magnetotelluric method in China,including the MT equipments,data Processing,inversion and applications,since the middle of 1960s has been reviewed inthis paper.Some results and situation of application of magnetotelluric to petroleum exploration and investigation of structure in the crust and upper mantle in China are hereby described.
            本文回顾了我国自60年代中期以来的大地电磁测深工作的发展,包括仪器设备、数据处理和反演以及实际应用,并介绍了大地电磁测深法在石油构造普查以及地壳上地幔探测方面应用的一些情况.
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