帕米尔-兴都库什地震带重新定位震源的三维图检测

IF 0.2 Q4 GEOLOGY

Journal of Himalayan Earth Sciences Pub Date : 2008-09-23 DOI:10.3126/HJS.V5I7.1248

Shamita Das

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引用次数: 0

摘要

喜马拉雅科学杂志| VOL. 5 | ISSUE 7 (SPECIAL ISSUE) | 2008 43在帕米尔高原-兴都库什地区，用3-D彩色图对深度超过50公里的约1700次地震的可靠定位震源进行了检测。这些震源定义了一个单一的扭曲的“S”型地震带，长700公里，宽不超过30公里，大多数活动集中在100 - 300公里的深度范围内。观测到的主要特征是:a)北倾的兴都库什地震带随着向东移动到帕米尔高原而不断变陡;b)东南倾斜的帕米尔地震带;c)兴都库什地震带东部深度大于200公里处俯冲板块的曲率和分叉;d)在帕米尔高原下90-110公里深度的中深度地震活动非常突然地中断，但没有扩展到更浅的深度，这表明该板块使用三维图对帕米尔高原兴都库什地震带的重新定位震源进行了检查

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Examination of relocated earthquake hypocenters in the Pamir- Hindu Kush seismic zone using 3-D plots

HIMALAYAN JOURNAL OF SCIENCES | VOL. 5 | ISSUE 7 (SPECIAL ISSUE) | 2008 43 Reliably relocated earthquake hypocenters in the Pamir-Hindu Kush region for about 1700 earthquakes deeper than 50 km, are examined using 3-D color plots. The hypocenters define an single contorted “S” shaped seismic zone, 700 km long and no more than 30 km wide and with most activity concentrated in the 100300 km depth range. The main features observed are: a) the continuous steepening of the north dipping Hindu Kush seismic zone as we move eastwards towards the Pamirs; b) the southeast dipping Pamir seismic zone; c) the curvature and forking of the subducting slab at depths greater than 200 km within the eastern part of the Hindu Kush seismic zone; d) the very abrupt cutoff in intermediate depth seismicity at 90-110 km depth with no extension to shallower depths, under the Pamirs, suggesting that the slab has Examination of relocated earthquake hypocenters in the PamirHindu Kush seismic zone using 3-D plots

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来源期刊

Journal of Himalayan Earth Sciences GEOLOGY-

CiteScore

0.70

自引率

0.00%

发文量

期刊介绍： The "Journal of Himalayan Earth Sciences" (JHES) is a biannual journal, managed by the National Centre of Excellence in Geology, University of Peshawar, Pakistan. JHES is recognized by Higher Education Commission (HEC), Pakistan in "X" Category. The JHES entertains research articles relevant to the field of geosciences. Typical geoscience-related topics include sedimentary geology, igneous, and metamorphic geology and geochemistry, geographical information system/remote sensing related to natural hazards, and geo-environmental issues and earth quake seismology, and engineering and exploration geophysics. However, as the journal name implies, the articles addressing research relevant to the above disciplines in the Himalayan region will be given prime importance and relevance.