Collaborative Research: A Magnetotelluric Study of the Lower Crust and Upper Mantle in California

这是一个合作项目， 加州的测量和三维解释 这将集中于确定下地壳和上地壳 地幔渗透率 这些测量及其 解释将有助于试图理解 存在于该地区下地壳的条件， 一定在正在进行的构造运动中发挥作用， 目前，这是一个很好的辩论的主题。 这些 测量还应该能够检测到任何不寻常的热 可能与地幔有关的上地幔条件 变形过程 确定地壳的能力 来自大地电磁测量的电阻率是由于 幸运的是，海洋电导率-电阻率 结构允许洋流系统被带到 加州的地壳上部，因此，大地电磁 测量可以遵循这些电流的工作方式 通过下地壳回到地幔

This is a collaborative project for making magnetotelluric measurements and three dimensional interpretations in California that will concentrate on determining the lower crust and upper mantle resistivities. These measurements and their interpretation will be helpful in trying to understand the conditions that exist in the lower crust of this region which must play a role in the ongoing tectonics, and which are presently the subject of a good deal of debate. These measurements should also be able to detect any unusual thermal conditions in the upper mantle which could be related to mantle deformation processes. The ability to determine crustal resistivities from magnetotelluric measurements is due to the fortunate circumstance that the oceanic conductivity-resistivity structure allows the oceanic current system to be brought up onto the California upper crust, and therefore, magnetotelluric measurements can follow the way in which these currents work their way back into the mantle through the lower crust.