Test of 3C recording with 1C instruments in association with High Lava Plains field program, for crustal shear-wave velocity, anisotropy, and lithology.

这是一个SGER奖，将在先前资助的CD项目（高熔岩平原实验）中利用炸药爆炸。pi将收集高分辨率（100米间距，1毫秒时间采样）P ？S ？俄勒冈州东南部多个方位的波浪剖面。分析数据的各向异性和S ？波速，利用高空间分辨率。虽然在美国已经进行了一些地壳各向异性的初步观测，但通常不可能确定其深度范围，因为被动观测通常是在远低于主动源测量的频率（分辨率较粗）下进行的。因此，需要进行三分量（3C）有源测量，以补充现在标准的3C无源接收机功能方法。如果pi成功，他们的结果，结合现有的CD资助的爆炸源折射速度模型和接收函数图像，将有助于估计岩浆侵入和地壳流动在保持俄勒冈州东南部地壳厚度方面的相对作用。除了为cd资助的高熔岩平原实验收集科学数据外，pi还将演示在一个地点平行使用三个单组分（1C）记录仪记录3C数据的技术可行性。后一个目标的成功将为更充分地利用pascal和EarthScope德克萨斯记录设备开辟一条道路，更完整地记录由nsf资助的受控源实验产生的波形，并从未来的实验中提取额外的科学结果。IRIS正在安排300个线束的制作。将900台现有的1C记录仪（德克萨斯人）连接在一起，每组3到300台现有的3C 4.5 Hz检波器，该项目不收费。

This is an SGER award which will take advantage of dynamite explosions during a previously funded CD project (the High Lava Plains Experiment). The PIs will collect high-resolution (100 m spacing, 1 ms temporal sampling) P ? and S ? wave profiles at multiple azimuths in south-eastern Oregon. The data will be analyzed for anisotropy and S ? wave velocity, utilizing the high spatial resolution. Although some preliminary observations of crustal anisotropy have been made in the USA, it has not normally been possible to localize their depth extent, because passive observations are typically made at far lower frequencies (coarser resolution) than active-source measurements. Hence the need to make 3 component (3C) active-source measurements to complement the now standard 3C passive-source receiver-function methods. If the PIs are successful, their results, in conjunction with the existing CD funded explosive-source refraction velocity model and receiver function images, will help estimate the relative roles of magmatic intrusions and crustal flow in maintaining crustal thickness in SE Oregon.In addition to collecting data of scientific interest to the CD-funded High Lava Plains Experiment, the PIs will demonstrate the technical feasibility of using three one-component (1C) recorders in parallel at a single site to record 3C data. Success in the latter aim will open a path to fuller utilization of the PASSCAL and EarthScope Texan recording facility, more complete recording of the waveforms generated by NSF-funded controlled-source experiments, and extraction of additional scientific results from future experiments. IRIS is arranging fabrication of 300 ?harnesses? to connect 900 existing 1C recorders (Texans) in groups of 3 to 300 existing 3C 4.5 Hz geophones, at no charge to this project.