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

与高熔岩平原现场计划相关的 1C 仪器的 3C 记录测试，用于地壳剪切波速度、各向异性和岩性。

• 批准号: 0821785
• 负责人: Simon Klemperer
• 金额: $ 5万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-08-01 至 2011-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0821785&HistoricalAwards=false
• 关键词: Test; 3C; recording; 1C; instruments

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.

这是一个SGER奖，它将利用以前资助的CD项目(High Lava Plains实验)中的炸药爆炸。PI将采集高分辨率(间隔100m，时间采样1ms)P？那S呢？俄勒冈州东南部多方位波谱。将数据分析为各向异性和S？波速，利用高空间分辨率。尽管美国已经对地壳各向异性进行了一些初步观测，但通常不可能确定其深度范围，因为被动观测的频率通常比主动源测量的频率低得多(分辨率更低)。因此，需要进行三分量(3C)有源测量，以补充目前标准的3C无源接收函数方法。如果PIS成功，他们的结果与现有的Cd资助的爆炸源折射速度模型和接收器函数图像一起，将有助于估计岩浆侵入和地壳流动在维持俄勒冈州东南部地壳厚度方面的相对作用。除了收集Cd资助的High Lava Plains实验具有科学意义的数据外，PIS还将证明在一个地点并行使用三个单分量(1C)记录器记录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PASSCAL和EarthScope德克萨斯记录设施开辟一条道路，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更多的科学结果。爱丽丝正在安排制造300英寸的马具？连接900个现有的1C记录器(德克萨斯人)，每组3到300个现有的3C4.5赫兹地震检波器，该项目免费。