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首页> 外文期刊>Tectonophysics: International Journal of Geotectonics and the Geology and Physics of the Interior of the Earth >Thermal modeling of continental subduction and exhumation constrained by heat flow and seismicity in Taiwan
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Thermal modeling of continental subduction and exhumation constrained by heat flow and seismicity in Taiwan

机译：受台湾热流和地震活动约束的大陆俯冲与发掘热模型

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The thermal evolution of crustal exhumation subsequent to the subduction of the continental margin is modeled through numerical solutions to the two-dimensional heat conduction equation. The boundary conditions used in the modeling are basically constrained by available geophysical and geological observations in the Taiwan area. Temperature distributions are calculated at one-million-year intervals over a 5 Ma duration. Although this study presents a tentative estimation based on some reasonable assumptions, the preliminary results not only explain the sharp change in seismicity within the crust but also agree with the general heat flow pattern on the surface of Taiwan. More specifically, both the high heat flow and the aseismic belt beneath the Eastern Central Range, which are probably attributed to higher temperatures within the crust, are modeled by crustal exhumation after the subduction of the continental margin. However, the occurrence of deeper earthquakes east of the Central Range is a result of the lower thermal gradient, which is due to the subduction of the cold continental crust into the uppermost mantle. In summary, preliminary thermal modeling supports the possibility of a tectonic model of active continental subduction and crustal exhumation for the Taiwan Orogen. (C) 2000 Elsevier Science B.V. All rights reserved. [References: 43]
机译：通过对二维热传导方程的数值解，对大陆边缘俯冲后地壳发掘的热演化进行了建模。建模中使用的边界条件基本上受到台湾地区可用的地球物理和地质观测的限制。在5 Ma的持续时间内，以百万年为间隔计算温度分布。尽管本研究基于一些合理的假设给出了初步估计，但初步结果不仅解释了地壳内地震活动的急剧变化，而且与台湾表面的一般热流模式相吻合。更具体地讲，东部中部山脉下方的高热流和抗震带，可能是由于地壳内部较高的温度，是由大陆边缘俯冲后的地壳发掘模拟的。但是，中部山脉以东发生的更深地震是较低的热梯度的结果，这是由于将冷的大陆壳俯冲到了最上层的地幔中。总而言之，初步的热学模拟为台湾造山带构造活动的大陆俯冲和地壳发掘的构造模型提供了可能性。 （C）2000 Elsevier Science B.V.保留所有权利。 [参考：43]

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