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首页> 外文期刊>Seismological research letters >First Steps toward a Reassessment of the Seismic Risk of the City of Dushanbe (Tajikistan)
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First Steps toward a Reassessment of the Seismic Risk of the City of Dushanbe (Tajikistan)

机译：重新评估杜尚别市（塔吉克斯坦）地震风险的第一步

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摘要

The country of Tajikistan is located in the Asia–India continental collision zone where the northward-moving Indian plate indents the Eurasian plate (Molnar and Tapponnier, 1975). The Asian lithosphere being impinged upon by the shallow northward underthrusting Indian lithosphere has resulted in high-mountain topography, which is subject to active deformation and contemporary faulting, and, consequentially, frequent earthquakes (e.g., Gubin, 1960; Burtman and Molnar, 1993). According to the Global Seismic Hazard Map (Giardini, 1999), almost the entire country exhibits a high-hazard level with intensities of VIII–IX for a 5% exceedance in 50 years. Most of the earthquakes that occur in these fault zones are crustal events with dominating thrust faulting along the Pamir front, whereas on the eastern edge of the Pamir the style of deformation is generally characterized by oblique thrusting with a component of strike-slip motion. Thrust-type events beneath theTadjik Depression, a compressional intermountain basin in the western part of the country, indicate that both the sedimentary rocks and the basement are involved in shortening (Fan et al., 1994; Delvaux et al., 2013).
机译：塔吉克斯坦的国家位于亚洲－印度大陆碰撞区，北移的印度板块使欧亚板块凹陷（Molnar and Tapponnier，1975）。亚洲岩石圈受到印度洋北下冲断的浅冲作用，形成了高山区，容易发生形变和当代断层，并因此发生了频繁的地震（例如，Gubin，1960; Burtman和Molnar，1993）。 。根据《全球地震灾害图》（Giardini，1999），几乎整个国家都表现出高危险等级，其强度为VIII–IX，在50年内超过5％。在这些断层带发生的大部分地震都是地壳事件，其中沿帕米尔前缘主要为逆冲断层，而在帕米尔东部边缘，变形形式通常以斜冲和走滑运动为特征。塔吉克山pression陷（该地区是一个受压山间盆地）之下的推力型事件表明，沉积岩和基底都参与了缩短（Fan等，1994; Delvaux等，2013）。

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