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: 9707188
• 负责人: Stephen Grand
• 金额: $ 12.16万
• 依托单位: University of Texas at Austin
• 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 2002-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9707188&HistoricalAwards=false
• 关键词: Collaborative; Research; Colorado; Plateau; Rio

9707188Grand 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.

9707188Grand 这项研究涉及对从德克萨斯州西部大平原穿过里奥格兰德裂谷一直延伸到科罗拉多高原的横断面下方的地壳和地幔进行地震学调查。 借助 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、新墨西哥州立大学、新墨西哥矿业技术研究所和洛斯阿拉莫斯国家实验室）的科学家将在 1100 公里长的线路上进行 10 至 12 个月的测试记录自然发生的地震。 将收集地震体波（P 和 S）和表面波数据，以便构建美国西南部该地区下方详细的 P 和 S 速度二维地图。 该绘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、里奥格兰德裂谷下方地幔与地壳应变之间的联系以及俯冲法拉隆的位置等问题。盘子。 地表地质信息与深层结构图像的整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。