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首页> 外文期刊>Journal of Asian earth sciences >Style of the surface deformation by the 1999 Chichi earthquake at the central segment of Chelungpu fault, Taiwan, with special reference to the presence of the main and subsidiary faults and their progressive deformation in the Tsauton area
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Style of the surface deformation by the 1999 Chichi earthquake at the central segment of Chelungpu fault, Taiwan, with special reference to the presence of the main and subsidiary faults and their progressive deformation in the Tsauton area

机译：台湾Chelungpu断层中段1999年Chichi地震的地表形变样式，特别提到了Tsauton地区主要和次要断层的存在及其渐进形变

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摘要

We describe the style of surface deformation in the 1999 Chichi earthquake in the central segment of the Chelungpu Fault. The study covers the Kung-fu village, north of Han River, to the south of Tsauton area. A characteristic style of the surface deformation is a convex scarp in profile and sinuous plan view, due to the low angle thrust fault. Two subparallel faults, including the west facing Tsauton West fault, and the east facing Tsauton East fault, limit the western and eastern margin of the Tsauton terraced area. The Tsauton West fault is the continuation of the main Chelungpu fault and the Tsauton East fault is located about 2 km apart. Both faults record larger amounts of vertical displacement on the older terraces. The 1999 surface rupture occurred exactly on a pre-existing fault scarp of the Tsauton West and East faults. Thus, repeated activities of these two faults during the Holocene, possibly since the late Quaternary, are confirmed. The amount of vertical offset of the Tsauton East fault is smaller, and about 40-50% of that of the Tsauton West fault for the pre-existing fault. This indicates that the Tsauton East fault is a subsidiary fault and moved together with the main fault, but accommodated less amount.
机译：我们描述了1999年的契龙普断裂中段的Chichi地震的地表形变样式。该研究涵盖汉江以北，绍顿地区以南的功夫村。由于低角度推力断层，表面变形的典型特征是轮廓上的凸形缺口和弯曲的平面图。两个次平行断层，包括向西的Tsauton西部断层和向东的Tsauton东部断层，限制了Tsauton阶地的西部和东部边缘。西绍顿断裂带是切龙普主断裂的延续，东绍顿断裂带相距约2公里。这两个断层在较旧的阶地上都记录了较大的垂直位移。 1999年的地表破裂恰好发生在Tsauton西部和东部断层的既有断层上。因此，可以确定这可能是自第四纪晚期以来在全新世期间这两个断层的重复活动。 Tsauton East断层的垂向偏移量较小，约为先前存在的Tsauton West断层的垂向偏移量的40-50％。这表明向绍顿东部断层是次生断层，与主断层一起移动，但容纳量较小。

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