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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50559


    Title: The Deep Electrical Structure of Southern Taiwan and Its Tectonic Implications
    Authors: Chiang,CW;Chen,CC;Unsworth,M;Bertrand,E;Chen,CS;Thong,DK;Hsu,HL
    Contributors: 地球物理研究所
    Keywords: 1999 CHI-CHI;SAN-ANDREAS FAULT;MAGNETOTELLURIC DATA;CRUSTAL FLUIDS;DRILLING PROJECT;ARC-CONTINENT;EARTHQUAKE;SUBDUCTION;COLLISION;ZONE
    Date: 2010
    Issue Date: 2012-03-27 17:36:46 (UTC+8)
    Publisher: 國立中央大學
    Abstract: The Taiwan orogen has formed as a result of the arc-continent collision between the Eurasian continental margin and the Luzon volcanic arc over the last 5 million years and is the type example of an arc-continent collision. The tectonic processes at work beneath Taiwan are still debated; the available data have been interpreted with both thin-skinned and lithospheric collision models. In 2004, the Taiwan Integrated Geodynamical Research (TAIGER) project began a systematic investigation of the crustal and upper mantle structure beneath Taiwan. TAIGER magnetotelluric (MT) data from central Taiwan favor a thick-skinned model for that region. The Taiwan orogen becomes younger to the south, so the earlier stages of collision were investigated with a 100-km-long MT profile in southern Taiwan at latitude of 23.3 degrees N. Data were recorded at 15 MT sites and tensor decomposition and two-dimensional inversion were applied to the MT data. The shallow electrical resistivity structure is in good agreement with surface geology. The deeper structure shows a major conductor in the mid-crust that can be explained by fluid content of 0.4-1.4%. A similar feature was observed in central Taiwan, but with a higher fluid content. The conductor in southern Taiwan extends to lower crustal depths and is likely caused by fluids generated by metamorphic reactions in a thickened crust. Together the central and southern Taiwan MT profiles show a crustal root beneath the Central Range.
    Relation: TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES
    Appears in Collections:[地球物理研究所] 期刊論文

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