RIDGE Postdoctoral Fellowship: Seismic Modeling of the Oman Ophiolite and Comparison with Undershooting Data from the East Pacific Rise

Toomey 9810860 机构：俄勒冈州大学RIDGE博士后奖学金：阿曼蛇绿岩的地震模拟及与东太平洋海隆欠冲数据的比较 的 申请人的论文包括一份假定的古扩张中心的地幔部分的详细结构图 阿曼蛇绿岩中橄榄岩的显微构造特征，并对研究区橄榄岩样品进行了显微构造分析。 拟议项目的目的是利用这些实地数据预测地震结构，从而通过阿曼古洋脊地幔流的地震模型模拟射线路径和传播时间。这些合成地震数据将与最近在东太平洋海隆进行的地幔地震调查结果进行比较，这些调查使用Pn波低于海隆，以便绘制浅地幔的各向同性和各向异性结构。 将阿曼蛇绿岩的预测地震特征与东太平洋海隆沿着观测到的地震特征进行定量比较，将使我们能够确定阿曼蛇绿岩的地幔部分是否与东太平洋海隆的地幔部分具有可比性。

Toomey 9810860 Institution: University of Oregon Title: RIDGE postdoctoral fellowship: seismic modeling of the Oman ophiolite and comparison with undershooting data from the East Pacific Rise The applicant's thesis included a detailed structural mapping of the mantle section of presumed paleo-spreading centers in the Oman ophiolite, and a microstructural analysis of peridotite samples from the studied areas. The aim of the proposed project is to use these field data to predict seismic structure and thus to model ray paths and travel times through seismic models of the Oman paleo-ridge mantle flow. These synthetic seismic data will be compared to the results of recent seismic investigations of the mantle, made at the East Pacific Rise, which use Pn waves to undershoot the rise in order to map the isotropic and anisotropic structure of the shallow mantle. A quantitative comparison of the predicted seismic signatures of the Oman ophiolite with those observed along the East Pacific Rise will allow us to ascertain if the mantle section of the Oman ophiolite is comparable to that of the East Pacific Rise.