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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/27597


    Title: Preliminary result of magnetotelluric soundings in the fold-thrust belt of Taiwan and possible detection of dehydration
    Authors: Chen,CC;Chen,CS
    Contributors: 地球物理研究所
    Keywords: LOWER CONTINENTAL-CRUST;IMPEDANCE TENSOR;NEW-ZEALAND;DECOMPOSITION;COLLISION;DISTORTION;REFLECTION;EVOLUTION;INVERSION;MODEL
    Date: 1998
    Issue Date: 2010-06-29 18:41:39 (UTC+8)
    Publisher: 中央大學
    Abstract: Until the magnetotelluric (MT) soundings were conducted in the last two years, there was no systematic view of the deep electric conductivity in the fold-thrust belt of the Taiwan orogen, being a typical example of are-continental collision. Presented in this paper are the initial results and preliminary interpretation of the MT survey in Taiwan. The determinant response of the impedance tensor was calculated for inversion and Occam's inversion which could generate smooth models was mainly used for interpreting MT data at each site. The existence of a conductive zone with depths of 10-20 lan beneath the Island of Taiwan is undoubtedly the most important feature found in this study. The depths are well correlated with the inferred depth of dehydration reactions of Suppe (1981) and the top of the aseismic lower crust observed by Wang et al. (1994). Thus, the authors believe that the cause of this conductive zone is probably the fluids released from dehydration reactions. Additionally, close to the Lishan fault the MT data show strong distortions which may be the result of induction in more complex three-dimensional structures. Further multi-dimensional analysis of the data is required in the future for delineating a more realistic image of the subsurface heterogeneous structure. (C) 1998 Elsevier Science B.V. All rights reserved.
    Relation: TECTONOPHYSICS
    Appears in Collections:[地球物理研究所] 期刊論文

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