您的位置: 专家智库 > 资助详情>国家自然科学基金(40974053)

国家自然科学基金(40974053)

作品数:4 被引量:57H指数:2
相关作者:何加勇李松林孙译刘宝峰赖晓玲更多>>
相关机构:中国地震局中国地震局地球物理研究所更多>>
发文基金:国家自然科学基金更多>>
相关领域:天文地球更多>>

文献类型

  • 4篇中文期刊文章

领域

  • 4篇天文地球

主题

  • 2篇BELT
  • 1篇岩石
  • 1篇岩石圈
  • 1篇岩石圈结构
  • 1篇克拉通
  • 1篇克拉通破坏
  • 1篇反演
  • 1篇反演结果
  • 1篇NORTH_...
  • 1篇PROFIL...
  • 1篇REGION
  • 1篇USING
  • 1篇WENCHU...
  • 1篇CALCUL...
  • 1篇DATA
  • 1篇DESTRU...
  • 1篇DIFFER...
  • 1篇FAULT
  • 1篇GROUND
  • 1篇MOUNTA...

机构

  • 1篇中国地震局地...
  • 1篇中国地震局

作者

  • 1篇赖晓玲
  • 1篇刘宝峰
  • 1篇孙译
  • 1篇李松林
  • 1篇何加勇

传媒

  • 1篇Scienc...
  • 1篇Journa...
  • 1篇中国科学:地...
  • 1篇Geodes...

年份

  • 1篇2012
  • 3篇2011
4 条 记 录,以下是 1-4
排序方式:
Calculation of Ground Rotational Motions Using Seismic Array Data被引量:2
2012年
This article gives a description of our first study on ground rotational motion and its pre-liminary results. The ground rotational motions around vertical axis were obtained using near-field translational records of a temporal seismic array with observational distances of 1.8 to 2.7 km. The sources used are explosions with explosive of 500 kg for each. Ground rotational velocities were calcu-lated using the space derivatives of the horizontal components of translational velocities from the array. The peak ground rotational velocities (PGRV) are approximately 30 to 57 ?rad/s. Our results are very close to those from Wassermann et al. (2009), who used both a seismic array and a rotational sensor to record an explosion in Germany and obtained PGRV values of about 50 ?rad/s. Their explosives are 150 kg, only one third of ours, but their observational distance is 250 m, much less than ours.
李松林赖晓玲孙译苗琪
由诸城-宜川人工地震剖面反演结果看太行山两侧岩石圈结构的差异被引量:38
2011年
利用诸城-宜川人工地震折射/宽角反射剖面的资料,得到了华北克拉通南部岩石圈二维速度结构.结果表明,太行山东西两侧岩石圈结构存在着巨大的差异.东侧较薄,为70~80km;西侧较厚,为85~120km.在太行山重力梯度带附近,岩石圈厚度出现了约30km的突变.岩石圈地幔和下地壳介质的P波速度值东侧较低,西侧较高.东侧的中下地壳内存在不同尺度的低速体,西侧则尚未发现.这些差异表明,太行山重力梯度带也是一条岩石圈厚度突变带和岩石成分分隔带.根据Pm波的波形特点,推测东部地区的莫霍面不再是一个尖锐的间断面,而是一个复杂的过渡带.初步分析认为,上地幔物质的热机械-化学侵蚀作用是引起太行山东侧岩石圈减薄和破坏的主要机制,太平洋板块俯冲是改变华北克拉通岩石圈地幔性质的重要动力学因素.
李松林赖晓玲刘宝峰王志铄何加勇孙译
关键词:克拉通破坏
Fault-zone trapped waves at Muyu in Wenchuan earthquake region被引量:2
2011年
Trapped waves in the Qingchuan fault zone were observed at Muyu near the northeastern end of the fractured zone of the Wenchuan Ms8. 0 earthquake. The results indicate a fault-zone width of about 200 m and a great difference in physical property of the crust on different sides of the fault. The inferred location of crustal changes is consistent with land-form boundary on the surface
Lai Xiaoling Sun Yi
Differences in lithospheric structures between two sides of Taihang Mountain obtained from the Zhucheng-Yichuan deep seismic sounding profile被引量:28
2011年
A 2-D model of lithospheric velocity structures in the southern part of the North China Craton was obtained using data from the Zhucheng-Yichuan deep seismic sounding profile.Results show that there are great differences in lithospheric structures between two sides of Taihang Mountain.In the eastern region,the lithosphere is thinner,with a thickness of about 70-80 km,while in the western region,the thickness is 85-120 km.There is a jump of the lithospheric thickness across Taihang Mountain gravity anomaly belt with a magnitude of about 30 km.P wave velocities of the lithospheric mantle and lower crust are lower in the eastern region and higher in the western region.In the eastern region,there are low velocity bodies in the middle and lower crust,while none were found in the western region.These differences indicate that the Taihang Mountain gravity anomaly belt is a belt with a abrupt change of lithospheric thickness and lithological composition.According to the Pm waveform,it can be deduced that the Moho in the eastern region is not a sharp discontinuity,but a complex transitional zone.From a preliminary analysis,it is found that the geothermal mechanical-chemical erosion could be the main mechanism causing the thinning and destruction of the lithosphere beneath the eastern side of Taihang Mountain.In addition,subduction of the Pacific Plate is an important factor which changes the properties of the lithospheric mantle of the North China Craton.
LI SongLinLAI XiaoLingLIU BaoFengWANG ZhiSuoHE JiaYongSUN Yi
共1页<1>
聚类工具0