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地震转换波测深法
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  相似匹配句对
     SEISMIC CONVERTED WAVE SOUNDING ON URUMQI─KUERLE PROFILE
     乌鲁木齐──库尔勒地震转换测深
短句来源
     DEEP SOUNDING SURVEY BY CONVERTED WAVES OF EARTHQUAKES IN CENTRAL PART OF THE TARIM BASIN AND ITS INTERPRETATION
     塔里木盆地中部地震转换测深及其解释
短句来源
     APPLICATION OF SEISMIC CONVERTED WAVE IN EXPLORATING DEEP CRUSTAL STRUCTURE IN LIAONING PROVINCE
     地震转换在研究辽宁深部构造中的应用
短句来源
     INVESTIGATION OF CRUST STRUCTURE IN FUZHOU AREA BY MEANS OF CONVERTED WAVES OF EARTHQUAKES
     福州地区地壳结构的地震转换测深研究
短句来源
     THE RESULTS OF DEEP SOUNDING BY USING CONVERTED WAVES OF EARTHQUAKES IN THE BEIJING-TIANJIN- TANGSHAN REGION
     京津唐地区地震转换测深结果
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This work deals with the structure of crust and upper mantle as revealed by an experimental study along the Kangzhuang-Dachang ( 康庄一大厂) profile near Peking, China by observing converted seismic waves of earthquakes. Layered and faulted block structures are indicated. By analyzing and comparing the superficial and deeper structural features of the region, it can be found that a nearly NWW-SBB oriented strong horizontal stress field has been in action within the crust and thus given rise to the up- and downwarping...

This work deals with the structure of crust and upper mantle as revealed by an experimental study along the Kangzhuang-Dachang ( 康庄一大厂) profile near Peking, China by observing converted seismic waves of earthquakes. Layered and faulted block structures are indicated. By analyzing and comparing the superficial and deeper structural features of the region, it can be found that a nearly NWW-SBB oriented strong horizontal stress field has been in action within the crust and thus given rise to the up- and downwarping structural units of the region.Hypocentral distributions of earthquakes in this region may be that west of the Gaoliying(高丽营) fault, most of the earthquake foci are located on the top and bottom surfaces of the so-called granitic layer, while east of the Gaoliying fault, they are mostly on the fault belt itself. (Fig. 1).

本文介绍北京地区康庄—大厂剖面试验的地震转换波测深法得到的地壳、上地幔结构.显示层状和断块的特征。分析本区地表构造与深部构造的特征及其相互关系表明,本区地壳内存在过很强的近 NWW-SEE 向水平压应力,从而造成本区隆、凹的各基本构造单元.本区震源分布有两种情况:高丽营断裂以西震源大都分布在“花岗岩”层的顶面和底面上,在此断裂以东地区震源主要分布在断裂带上(图1).

This paper discribes the results of investigation of deep structures in Tangshan earthquake area by using method of P to SV converted waves.6-7 groups of PS converted waves can be recognized in the area. The most stable of which are the groups of PSG and PSM coming from the top and bottom boundaries G and M of the crystalline crust. But in the earthquake source zone an additional PS wave group has been recognized in the middle part of the crust. Besides, the intensity, as well as the stability of the PSM wave...

This paper discribes the results of investigation of deep structures in Tangshan earthquake area by using method of P to SV converted waves.6-7 groups of PS converted waves can be recognized in the area. The most stable of which are the groups of PSG and PSM coming from the top and bottom boundaries G and M of the crystalline crust. But in the earthquake source zone an additional PS wave group has been recognized in the middle part of the crust. Besides, the intensity, as well as the stability of the PSM wave group are reduced apparently, and the time delay of PS waves propagating through the source zone! is increased greatly in comparison with the sorrounding area of Tangshan. All these anomalies of PS wave characteristic indicate that the physical property of the crust layer has changed in the earthquake source zone.Two cross-sections of deep structure were obtained along the observed lines. The deep structures are very complicated beneath the Tangshan area which consists of sharp uplifting of the boundary G in upper part of the crust and subsidence of the boundaries in lower crust and upper mantle, appearence of an additional layer in the middle part of the crust, thickening of the middle and lower layers of the crust, and the presence of a set of deep faults in the vicinity of Tangshan earthquake area.Comparison of the deep structures with distribution of the hypocentres in the area shows that most of the hypocentres are located in the upper part of the crust between boundaries G and C, and the hypocentres of the mainshock and large aftershocks are distributed near the top-boundary of the middle layer of the crust. It means that the location of strong earthquakes is controlled by position of the middle layer of the crust. It is suggested that the strong vertical uplift-subsidence differential movement in the upper mantle beneath Tangshan area may be an important triggering factor for the occurrence of the Tangshan earthquake.

本文介绍利用地震转换波测深法研究1976年7.8级唐山大震区深部构造的某些结果,得出了沿两条测线的深部构造剖面图。发现在极震区的数十公里的范围内,地壳和上地幔具有异常结构,在地壳中部比震区外围多出一个中间层位,埋深约12—20km,地壳上部界面向上挠曲,而莫霍面和上地幔顶部界面却强烈地向下挠曲,引起了震区岩石圈厚度的加大,在震区存在深浅不等的深部断裂。深部构造与震源分布的对比表明,唐山主震和绝大多数余震均分布在壳内中间层之上,有的甚至就分布在壳内中间层的上、下界面附近。转换波测深结果表明,本区地壳上地幔中强烈的升降差异运动可能是唐山大震的重要促发因素。

The method of deep sounding by converted waves of earthquakes was used for the first time in investigation of deep crust structures in Fuzhou area of coast Southeast China. A cross-section of deep crust structure with NE direction and four contour maps of major crust boundaries for the area have been obtained. It is revealed that the Minjiang fault consists of two steep deep-seated faults with NW strike, and that the deep structure of Fuzhou basin is characterized by the belt-shaped subsidence of the boundary...

The method of deep sounding by converted waves of earthquakes was used for the first time in investigation of deep crust structures in Fuzhou area of coast Southeast China. A cross-section of deep crust structure with NE direction and four contour maps of major crust boundaries for the area have been obtained. It is revealed that the Minjiang fault consists of two steep deep-seated faults with NW strike, and that the deep structure of Fuzhou basin is characterized by the belt-shaped subsidence of the boundary G in upper crust and the relative uplift ing of the boundary C, Ci, M and low velocity layer in the middle and lower crust. The results obtained have been served as a basis for the interpratation of the anomaly of high heat flow in Fuzhou region.

地震转换波测深法首次在我国东南沿海的福州地区进行地壳深部构造的探测,得出了该区地壳中的4个主要界面的构造形态图和沿北东方向穿越本区的地壳深部构造剖面图。查明闽江断裂由两条北西向产状较陡的超壳断裂组成,福州断陷盆地的深部上地壳G界面呈条带状下沉,下地壳C、C_1界面和M面及壳内低速层均相对上隆,这一结果为解释本区高地热异常提供了深部依据。

 
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