Collaborative Research: The Growth of the Tibetan Plateau - A Seismic Investigation of the Qilian Shan and Surrounding Tectonic Blocks

合作研究：青藏高原的生长——祁连山及周边构造块的地震调查

• 批准号: 0738433
• 负责人: Eric Sandvol
• 金额: $ 12.99万
• 依托单位: University of Missouri-Columbia
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-05-01 至 2016-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0738433&HistoricalAwards=false
• 关键词: Collaborative; Research; Growth; Tibetan; Plateau

The rise of the Tibetan plateau has profoundly changed the Earth's atmosphericcirculation and climate. For this reason, it has been the prime site to understand the linkbetween tectonics and climate change as well as the processes of continental collision.There are several competing hypotheses for the rise of the Tibetan plateau: a rapid andbroad increase in the elevation of the plateau, an expansion of the plateau bycontinuous viscous flow of lower crust, or an expansion of the plateau by sequential andlocalized shear between coherent crust and mantle blocks. At the center of thecompeting scenarios is the question whether the plateau has grown upward en masseor outward over time. The best place to address this question is the northeast Tibetanplateau, where the plateau is at a nascent stage with features and dynamic processesin the crust and shallow mantle that are keys to the understanding of the mechanismsthat may have operated for the entire Tibetan plateau.This collaborative project between U.S. and Chinese institutions acquires seismic datafrom the northeast Tibetan plateau. The research includes detailed studies to image thecrust and mantle structures in the region, to test the current hypotheses against seismicobservations, and to develop new models that integrate seismic observations and othergeological constraints. The research also includes focused studies to analyze regionalearthquake activity, which helps to mitigate earthquake hazards in one of theseismically most active areas in the interior of a continental plate.

藏族高原的崛起极大地改变了地球的大气循环和气候。出于这个原因，它是理解构造与气候变化之间的联系以及大陆碰撞过程之间的联系的主要网站。在藏族高原的崛起中，有几个相互竞争的假设：在高原的高度上增加了高度的升高，通过较低的con con和plats coal seplation and plate的扩展，或者在平台之间扩展，或者是平原的范围，或者是平原的范围，而平原的相互构成的量表则是plat的cooliention and plate的扩展。地壳和地幔块。在竞争场景的中心是高原是否随着时间的流逝向外增长。解决这个问题的最佳场所是东北藏普拉图，在该阶段，高原正处于特征和动态过程中，在地壳和浅层地幔中，这是对整个藏族高原机制的理解的关键。这项研究包括图像该地区的tecrust和地幔结构的详细研究，以测试针对地震观察的当前假设，并开发新的模型，以整合地震观测和其他地质限制。这项研究还包括针对分析区域性性活动的重点研究，这有助于减轻大陆板内部最活跃的地区之一的地震危害。