Garwhal-Kumaun喜马拉雅山脉的地震层析成像:基底分离是一种渴望的思考吗?

IF 0.2 Q4 GEOLOGY

Journal of Himalayan Earth Sciences Pub Date : 2008-09-23 DOI:10.3126/HJS.V5I7.1313

S. Mukhopadhyay, J. Sharma, B. Arora

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引用次数: 1

摘要

喜马拉雅科学杂志2008年第5卷第7期(特刊)| 2008 128利用局地地震的p - s相资料在Garhwal-Kumaun喜马拉雅山区进行了地震层析成像。我们观察到，近地表低速带一般与沉积地层重合，如内外沉积地层和白令地层。变质岩，如Vaikrita, Almora和Ramgarh群显示为速度更快的天体。许多工作人员认为存在一个温和的北倾分离，使下喜马拉雅的沉积地层与下伏的变质结晶基底分离。这一建议部分基于地震活动模式。目前的地震层析成像工作没有显示Garwhal-Kumaun喜马拉雅山的地震层析成像:基底分离是一种渴望思维吗?

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Seismic Tomography of Garwhal-Kumaun Himalayas: Is the basal detachment a wistful thinking?

HIMALAYAN JOURNAL OF SCIENCES | VOL. 5 | ISSUE 7 (SPECIAL ISSUE) | 2008 128 We carried out seismic tomography in the Garhwal-Kumaun Himalayas using Pand S-phase data of local earthquakes. We observe that the near surface low velocity zones generally coincide with sedimentary formations, such as, inner and outer sedimentary formations and Berinag formations. The metamorphic rocks like Vaikrita, Almora and Ramgarh Groups show up as bodies having higher velocity. Many workers have suggested the presence of a gentle northerly dipping detachment that decouples Lower Himalaya sedimentary formations from underlying metamorphic crystalline basement. This suggestion is based in part on seismicity pattern. The present seismic tomographic work does not show Seismic Tomography of Garwhal-Kumaun Himalayas: Is the basal detachment a wistful thinking?

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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.