Collaborative Research: Seismological Investigation of the Cameroon Volcanic Line - A Hot Line in the Mantle?

研究人员建议通过检查喀麦隆火山线（CVL）下的地壳和上地幔的地震结构来评估火山线起源的模型，而不进行年龄增长。 没有年龄进程的火山线不能用传统的地幔柱模型来解释。 一个家庭的模型提出，热线可以解释的复杂性增加的羽框架内，虽然岩石圈张裂或小规模对流可能解释火山线没有年龄的进展。 CVL提供了一个很好的机会，调查地壳和上地幔的地震结构的热线，并提供约束的基础过程产生这种功能。 为了对CVL之下的地壳和上地幔的地震结构进行成像，研究所将在喀麦隆进行为期21个月的被动宽带地震实验，最初使用8个台站，然后使用30个台站。 地震数据将通过体波和表面波层析成像、接收器功能和剪切波分裂技术进行分析。

The investigators propose to evaluate models for the origin of volcanic lines without age progression by examining the seismic structure of the crust and upper mantle beneath the Cameroon Volcanic Line (CVL). Volcanic lines without age progression cannot be explained by the conventional plume model. One family of models proposes that hot lines can be explained by added complexities within the plume framework, although alternatively lithospheric tensional cracks or small scale convection may explain volcanic lines without age progression. The CVL provides an excellent opportunity to investigate the crust and upper mantle seismic structure of a hot line and provide constraints on the underlying processes generating this feature. To image the seismic structure of the crust and upper mantle beneath the CVL, the PIs will carry out a 21-month passive broadband seismic experiment in Cameroon, using first 8 and then 30 stations. The seismic data will be analyzed by the techniques of body and surface waves tomography, receiver functions, and shear-wave splitting.