Collaborative Research: The Uplift and Seismic Structure of the Greater Caucasus

合作研究：大高加索地区的隆起和地震结构

• 批准号: 1620509
• 负责人: Kevin Mackey
• 金额: $ 27.6万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-09-15 至 2023-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1620509&HistoricalAwards=false
• 关键词: Collaborative; Research; Uplift; Seismic; Structure

This project uses the Greater Caucasus Mountains in southern Asia as a natural laboratory to study the early stages of mountain building. Using data from over 106 new seismic stations in Azerbaijan, Armenia, Russia, and Georgia, the researchers gain a better understanding of the recent uplift of the Greater Caucasus and the nature of earthquake related deformation in the region. This research helps gain better understanding of the processes that lead to the formation of mountain belts on Earth and the sub surface processes that lead to large earthquakes and volcanoes in a continental collision. This project includes improving seismic hazard assessment in continental deformation belts where thousands of lives and billions of dollars are at risk from recurrent devastating earthquakes including some of the world's largest energy producers. The aim is to improve the scientific community's understanding of earthquake hazards and the forces that are actively deforming the earth in a very young mountain belt. The Caucasus region is a logistically and politically challenging region to collect seismic data; however, we have managed to establish collaborative agreement with all of the countries involved in this project to share the data with one another. Due to a lack of quality data, the region has largely been unexplored in terms of the detailed uppermost mantle and crustal seismic structure thus this work is nearly guaranteed to find first order information concerning deep structure beneath the Greater Caucasus. This seismic experiment has two components: (1) a grid of stations spanning the Greater Caucasus and (2) a seismic transect consisting of passive stations spaced at distances of less 5 km that crosses the Greater Caucasus. In addition to the temporary stations, this research integrates data from the national networks to produce high resolution images of the seismic structure. The primary scientific question that this project intends to resolve with the images of the deep subsurface structure is the uplift mechanisms for the Greater Caucasus and how these relate to the uplift mechanisms for mountain belts in general.

该项目使用南亚大高加索山作为天然实验室，研究山区建筑的早期阶段。 研究人员利用来自阿塞拜疆，亚美尼亚，俄罗斯和佐治亚州的106个新的地震站数据，可以更好地了解该地区较大的高加索地区的最新提升以及该地区地震相关的变形的性质。这项研究有助于更好地了解导致地球上山带形成的过程以及导致大陆碰撞中大地震和火山的次表面过程。该项目包括改善大陆变形带中的地震危险评估，其中数千美元的生命和数十亿美元受到重复发生的毁灭性地震的风险，其中包括一些世界上最大的能源生产商。目的是提高科学界对地震危害的理解以及在非常年轻的山地上积极畸形地球的力量。 高加索地区是一个在逻辑上和政治上具有挑战性的地区，用于收集地震数据。但是，我们设法与该项目参与的所有国家建立了合作协议，以彼此共享数据。 由于缺乏质量数据，该地区在很大程度上没有探索详细的地幔和地壳地震结构，因此几乎可以保证，这项工作几乎可以找到有关在更大的高加索地区深层结构的一阶信息。 该地震实验具有两个组成部分：（1）跨越高加索的站网和（2）一个地震样带，由越过更大的高加索的距离距离较小的被动站组成，距离被动站组成。除临时站外，该研究还将来自国家网络的数据整合在一起，以产生地震结构的高分辨率图像。该项目打算用深度地下结构的图像解决的主要科学问题是更大的高加索地区的隆起机制，以及它们与一般的山带的提升机制如何相关。