Constraining Asthenospheric and Lithospheric Seismic Structure along the Yellowstone Hotspot

黄石热点地区的软流圈和岩石圈地震结构的约束

基本信息

批准号：
0440432
负责人：
Kenneth Dueker
金额：
$ 5.07万
依托单位：
University of Wyoming
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2005
资助国家：
美国
起止时间：
2005-07-01 至 2006-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0440432&HistoricalAwards=false
关键词：
Constraining Asthenospheric Lithospheric Seismic Structure

项目摘要

Constraining Asthenospheric and Lithospheric Seismic Structure along the Yellowstone Hotspot Synopsis for NSF websiteOne of the most profound continental upper mantle convective phenomena is the Yellowstone Hotspot. While substantial geophysical work has been done on Yellowstone over the last 30 years, several important questions remain with respect to the upper mantle and crustal modifications produced by this Hotpot.We propose a focused project that capitalizes on the excellent broadband seismic coverage of the Hotspot from a recent PASSCAL broadband experiment to examine: 1) how the Hotspot has affected bulk crustal velocities and thickness; 2) how the Hotspot has modified the lithosphere and lithosphere-asthenosphere boundary. The analysis will consist of two sub-projects. First, joint Pds, Sdp, and surface wave phase velocity inversion for velocity and discontinuity structure of the upper 200 km will be performed using a nearest neighbor directed Monte-Carlo algorithm. Second, depth dependent anisotropy analysis will be accomplished using the nearest neighbor algorithm to invert cross-convolved source normalized direct-S and SKS seismograms and Pds time-series. The proposed research advances discovery and understanding while promoting teaching, training and learning. It promotes education by funding a Ph.D. level graduate student and a new Master's student for one year. Our research infrastructure will be enhanced as we gain experience with the analysis techniques proposed. Providing new and better constraints on the Yellowstone hotspot is a global issue of concern to the Earth science community. To disseminate our results we intend to publish our results in a timely manner and post our results on the web.

黄石热点是最深刻的大陆上地幔对流现象的NSF网站的黄石热点概要沿黄石热点概要介绍的小圈和岩石圈地震结构。 While substantial geophysical work has been done on Yellowstone over the last 30 years, several important questions remain with respect to the upper mantle and crustal modifications produced by this Hotpot.We propose a focused project that capitalizes on the excellent broadband seismic coverage of the Hotspot from a recent PASSCAL broadband experiment to examine: 1) how the Hotspot has affected bulk crustal velocities and thickness; 2）热点如何修饰岩石圈和岩石圈 - 亚心圈边界。该分析将由两个亚项目组成。首先，将使用最近的邻居定向的蒙特 - 卡洛算法进行速度和不连续性结构的关节PDS，SDP和表面波相位速度反演。其次，将使用最近的邻居算法来实现深度依赖性各向异性分析，以反转交叉卷积源归一化直接S和SKS地震图和PDS时间序列。拟议的研究在促进教学，培训和学习的同时推进了发现和理解。它通过资助博士来促进教育。水平研究生和一名新硕士学生一年。随着我们提出的分析技术的经验，我们的研究基础设施将得到增强。在黄石热点上提供新的，更好的限制是地球科学界关注的全球问题。为了传播结果，我们打算及时发布结果，并将结果发布在网络上。