Crustal structure beneath the Hi-CLIMB seismic array in the central-western Tibetan Plateau from the

来源 :地震学报(英文版) | 被引量 : 0次 | 上传用户:luocheng890924
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The Hi-CLIMB seismic array is located in the central-western Tibetan Plateau. The H-κ-c method (Li JT et al., 2019) was applied to receiver function data on the HiCLIMB, which corrects the back-azimuthal variations in the arrival times of Ps and crustal multiples caused by crustal anisotropy and dipping interfaces before performing H-κstacking. Compared to the traditional H-κ method, the H-κstacking results after harmonic corrections showed considerable improvements, including greatly reduced errors, significantly less scattered H (crustal thickness) and κ (crustal vP/vS ratio) values, and clearer patterns of H and κ in different Tibetan blocks. This demonstrates that the H-κ-c method works well even for regions with complex crustal structures, such as the Tibetan Plateau, when there are helpful references from nearby stations or other constraints. The variation in crustal thickness agrees with previous studies but tends to be relatively shallower beneath most of the plateau. Two regions with particularly high crustal vP/vS were observed, namely, one in the northern Himalaya block and beneath the YarlungZangbo suture, and the other in the Qiangtang block. Their correlation with mid-crust low S velocities from previous studies suggests the possible presence of fluid or partial melt in the two regions, which may have implications for the crustal flow model. In contrast, the Lhasa block had relatively lower crustal vP/vS and relatively higher crustal S velocity within the plateau, which is interpreted to be mechanically stronger than the Himalaya and Qiangtang blocks, and without mid-crust partial melt.
其他文献
China Seismic Experimental Site (CSES) deals with a long-term process of development of a multidisciplinary technical system. In the construction, maintenance,
高中语文的教学内容丰富且教学范围较为宽广,对学生的阅读水平要求较高.这就需要教师探索有效的阅读教学方法,使学生更好地从文本中获取知识.本文将浅议语文群文阅读的教学方
本文从三个方面,对当前阶段技工学校对学生的日常管理中,所存在的一些问题进行了初步的论述,并且对这些问题提出了一些有针对性的问题解决思路,以期能够对当前阶段技工学校不
公司创业投资是公司创业、创业投资、战略管理和创新等多个领域的关键话题。文章在概括1980—2020年Web of Science数据库收录的公司创业投资文献特征的基础上,追溯公司创业投资内涵与定义的发展,梳理和提炼该领域研究的主题内容。文章将公司创业投资研究划分为初始萌芽、平稳发展和深化发展三个阶段,系统归纳分析了公司创业投资的目标与动机、影响因素、绩效效应以及其与其他公司创业方式的关系四个主题的研究内容。最后,在评述现有研究进展和不足的基础上,展望公司创业投资研究的未来方向。
随着社会的迅速发展,对人才的需求越来越大中职学校是向社会提供技能的重要场所.中职学校的最终目标是提高学生的整体素质,实现学生的全面发展.因此,中职学校必须接受道德教
为了解决制约我国经济社会发展的重大瓶颈问题,攻克对产业竞争力整体提升具有全局性影响和带动性强的关键共性技术,实现以科技发展的局部跃升带动生产力的跨越发展,结合社会主义制度集中力量办大事的优势和市场机制的作用,国家实施了多项重大科技项目。国家重大科技项目力求掌握一批事关国际民生和国家安全的关键核心技术,开发具有自主知识产权的战略性产品是其核心任务。但重大科技项目往往参与主体多、研究周期长且易于受到外部环境和内部因素等影响,加之项目每个阶段的创新投入和产出均不相同,外部环境和内部要素叠加作用呈非线性,导致知识
The joint source scanning algorithm (SSA) scans locations and focal mechanisms of microseismic events simultaneously. Compared to the traditional source scannin
初中化学教学实践中,怎样应用信息技术激发学生学习热情,提高课堂教学效率是教师关注的重要问题.本文将对信息技术在初中化学教学中的应用进行分析与思考,以供教育同行参考.
随着科学技术的飞速发展,在课堂教学中运用起电教手段也变得愈加常见.电教手段运用于教学之中对于小学语文教学来说即是机遇也是新的挑战,电教教学逐渐成为了小学语文课堂教
We focus here on the rupture directivity effect on the spatial distribution and attenuation characteristics of near-field ground motions during the 2008 MW7.9 W