Characterization of Crustal Reflectivity Patterns through Enhanced Imaging, AVO Analysis, and Integration of Seismic Reflection and Refraction Datasets

摘要：硬着陆。该项目旨在进一步分析1999年一次巡航中收集的地震数据，以确定危地马拉盆地深层穿透参考地壳剖面的潜在钻探点。该地区的地壳形成于中新世中期的快速扩张时期。由于扩散速度快，理论上认为脉岩-辉长岩过渡的深度应该较浅，因此更容易钻探。建议的工作将包括1)明亮UCR反射的波形建模，2)反射和折射数据集的整合，3)倾斜叠加/基底速度确定，4)同时进行P波和S波反演/各向异性研究，5)UCR/ lcdr的叠前深度偏移，以及6)其他测点的反射率模式表征。

ABSTARCT PI: HARDINGINST. UNIVERSITY OF CALIFORNIA-SCRIPPS-SDPROPOSAL # 0137184Award is for a project to further analyze seismic data collected during a cruise in 1999 that was undertaken to identify potential drill sites for a deep penetration, reference crustal section in the Guatemala basin. The crust in this area was created during an episode of rapid spreading during the middle Miocene. Because of the rapid spreading rate, theory suggests that the depth to the dike-gabbro transition should be shallower and therefore more accessible to drilling. The proposed work will include 1) waveform modeling of bright UCR reflections, 2) integration of reflection and refraction datasets, 3) slant stacking/basement velocity determination, 4) simultaneous P- and S- wave inversion/anisotropy investigations, 5) prestack depth migration of UCR/LCDRs, and 6) characterization of reflectivity patterns at other survey sites.