A Deep Seismic Reflection Piggyback to Image the Colorado Plateau Margin

这项研究的目的是深入研究科罗拉多高原地形边界上的地壳。这个项目涉及一个“搭载”深度反射实验，以利用美国地质调查局将于1989年在科罗拉多高原为其250公里折射剖面生成的相同来源。这五个研究领域包括：1)横跨科罗拉多高原边缘的垂直入射地震数据的P波结构解释，重点是下地壳和莫霍面；2)扇射分析，使用超出PMP临界距离的震源-接收偏移量成像莫霍面；3)研究背负式实验收集的广角剖面，4)分析了上地壳观测到的拉拉米德和晚新生代变形构造；5)分析和解释了背靠式实验的三分量数据，重点是由P速度和S速度得出的地壳成分。即将到来的美国地质调查局折射实验提供了一个独特的机会来获取和研究科罗拉多高原边缘的高质量和紧密的道间距数据集，这一边界将高度伸展的盆地和山脉省与稳定的相对未变形的科罗拉多高原分隔开来。

The objective of this research is an intensive study of the crust across the physiographic boundary of the Colorado Plateau. This project involves a "piggyback" deep reflection experiment to utilize the same sources that the U.S. Geological Survey will generate for its 250 km refraction profile on the Colorado Plateau in 1989. The five areas of research include: 1) a P-wave structure interpretation of vertical incidence seismic data across the edge of the Colorado Plateau emphasizing the lower crust and Moho, 2) an analysis of fan shots to image the Moho using source-receiver offsets beyond the critical distance of PmP, 3) a study of wide-angle profiles collected by the piggyback experiment, 4) analysis of Laramide and late Cenozoic deformational structures observed in the upper crust and 5) analysis and interpretation of 3-component data from the piggyback experiment with an emphasis on crustal composition derived from P and S velocities. The upcoming U.S. Geological Survey refraction experiment provides a unique opportunity to acquire and study a data set of excellent quality and close trace spacing across the Colorado Plateau margin, a boundary that separates the highly extended Basin and Range province from the stable relatively undeformed Colorado Plateau.