Analysis and Interpretation of Deep Seismic Reflection Profiles Across the Basin and Range-Colorado Plateau Transition Zone

本研究的目的是深入研究从稳定的科罗拉多高原到扩展的盆地和山脉省过渡带的地壳。我们将主要依靠最近收集的地震反射数据——这些数据是作为美国地质调查局在亚利桑那州进行的PACE（太平洋至亚利桑那州地壳实验）折射调查的“背载”实验收集的——尽管这些数据将与现有的COCORP（大陆反射剖面联盟）数据进行补充和整合。建议研究的四个领域包括：1)对过渡带的p波结构解释，强调下地壳和Moho； 2)对工业和COCORP数据以及新数据中异常反射的上地壳进行分析；3)研究背带实验中收集的广角剖面和扇形剖面；4)分析和解释新实验的三分量数据，重点分析由P和S速度得出的地壳成分。背驮式反射数据由于数据质量好、迹距近，特别适合研究过渡带。

The objective of this research is an intensive study of the crust in the transition zone from the stable Colorado Plateau to the extended Basin and Range province. We will rely primarily on recently collected seismic reflection data - data collected as a "piggyback" experiment to the U.S. Geological Survey PACE (Pacific to Arizona Crustal Experiment) refraction survey in Arizona -- although the data will be supplemented and integrated with existing COCORP (Consortium on Continental Reflection Profiling) data. The four areas of proposed research include: 1) a P-wave structural interpretation of the transiton zone emphasizing the lower crust and Moho, 2) an analysis of the unusually reflective upper crust seen on indsutry and COCORP data, as well as the new data, 3) a study of wide-angle and fan profiles collected in the piggyback experiment and 4) analysis and interpretation of 3- component data from the new experiment with an emphasis on crustal composition derived from P and S velocities. The piggyback reflection data are uniquely suited to study the transition zone because of the excellent data quality and close trace spacing of the survey.