Collaborative Research: Colorado Plateau/Rio Grande Rift/Great Plains Seismic Transect

合作研究：科罗拉多高原/里奥格兰德裂谷/大平原地震断面

• 批准号: 9706094
• 负责人: James Ni
• 金额: $ 17.12万
• 依托单位: New Mexico State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-01-01 至 2003-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9706094&HistoricalAwards=false
• 关键词: Collaborative; Research; Colorado; Plateau; Rio

9706094Ni This research involves the seismological investigation of the crust and mantle beneath a transect extending from the Great Plains of western Texas through the Rio Grande rift and well into the Colorado Plateau. By means of PASSCAL portable seismographs, scientists from four institutes (University of Texas at Austin, New Mexico State University, New Mexico Institute of Mining and Technology, and the Los Alamos National Laboratory) will occupy an 1100-km line for 10-12 months recording naturally occurring earthquakes. Seismic body-wave (P and S) and surface-wave data will be collected to enable the construction of detailed two-dimensional maps of P and S velocities beneath this portion of the southwestern United States. This mapping will be used to address questions such as the cause of the uplift of the Colorado Plateau, the depth of mantle processes that control surface tectonics, the connection between mantle and crustal strain beneath the Rio Grande Rift, and the location of the subducted Farallon plate. Integration of surface geological information with the deep structure images will result in a more complete regional tectonic model and a better understanding of the causes of the dramatic tectonic events that have occurred during the last 40 million years in this region.

9706094 Ni这项研究涉及从德克萨斯州西部的大平原通过格兰德河裂谷延伸到科罗拉多高原的一个断面下的地壳和地幔的地震学调查。 通过PASSCAL便携式地震仪，来自四个研究所（德克萨斯大学奥斯汀分校、新墨西哥州州立大学、新墨西哥州矿业和技术研究所以及洛斯阿拉莫斯国家实验室）的科学家将占用一条1100公里长的线路10-12个月，记录自然发生的地震。 将收集地震体波（P和S）和面波数据，以便能够在美国西南部的这一部分下方绘制详细的P和S速度二维图。 这张地图将用于解决诸如科罗拉多高原隆起的原因、控制地表构造的地幔过程的深度、格兰德河裂谷下方地幔与地壳应变之间的联系以及俯冲的法拉隆板块的位置等问题。 将地表地质信息与深部结构图像相结合，将产生更完整的区域构造模型，并更好地了解该地区过去4000万年来发生的剧烈构造事件的原因。