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首页> 外文期刊>Earth, planets and space: EPS >Seismological evidence of simultaneous mountain-building and crust-thickening from the 1999 Taiwan Chi-Chi earthquake (Mw=7.6)
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Seismological evidence of simultaneous mountain-building and crust-thickening from the 1999 Taiwan Chi-Chi earthquake (Mw=7.6)

机译：1999年台湾集集地震（Mw = 7.6）同时进行的山地建设和地壳增厚的地震学证据

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摘要

High-quality seismic data recorded during the 1999 Taiwan Chi-Chi earthquake (Mw=7.6) show that a small-scale orogenic process of both mountain-building and crust-thickening was simultaneously accomplished along one set of crustal-scale conjugated faults. Mountain-building near the surface was primarily produced by the main shock along an eastward low-angle thrust fault in the upper crust. In the meanwhile, a sequence of aftershocks along a westward high-angle reverse fault in the lower crust could increase crustal thickness even though major crustal deformation in generally taken place under ductile deformation. Also, velocity structures inverted from seismic tomography suggest that the crustal deformation in the form of both mountain-building and crust-thickening has been repeatedly generated by a similar orogenic process during the past million years. The dynamic dual process observed here contributes to the growth of the orogenic zone in the near the surface and deep crust in Taiwan.
机译：1999年台湾集集地震（Mw = 7.6）期间记录的高质量地震数据显示，沿着一组地壳规模的共轭断层同时完成了小规模造山过程，包括造山和地壳增厚。地表附近的山体建筑主要是由沿上地壳向东的低角度逆冲断层的主震产生的。同时，即使大的地壳变形通常在韧性变形下发生，沿下地壳的向西高角度反向断层的一系列余震也可能增加地壳厚度。同样，从地震层析成像中反过来的速度结构表明，在过去的一百万年中，类似的造山过程已经反复产生了以山区建造和地壳增厚形式存在的地壳变形。在这里观察到的动态双重过程促进了台湾近地表和深地壳造山带的生长。

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