Verständnis geophysikalischer Abbilder von Sutur Zonen: hohe elektrische Leitfähigkeit gekoppelt mit Anisotropie

地球内部结构的高分辨率图像仍然是地球物理学面临的主要挑战。本文的总体目标是将大地电磁（MT）方法发展成为这样一种工具，以活动和化石缝合带（SZs）的深层印记为主要目标。与区域相关的逆冲和剪切带可以穿透整个岩石圈。德国深钻项目（KTB）的一个基本结果是，剪切面上的石墨富集可以导致长时间持续的高导电性。利用纳米比亚达马拉带的现代MT研究，有可能将SZ化石追溯为地壳中的电性各向异性带。在短期内，我打算(I)利用来自不同区域的现有MT数据集对这一现象进行深入研究；（ii）以类似的视角参与新的现场实验；（iii）进一步发展我的成像方法，并将这些方法与相关的地球物理数据（如地震横波各向异性）结合起来，得出更综合的地球动力学解释。在长期的基础上，一个新的工作组将专注于主要构造系统的综合大地电磁学-地震模拟。

High resolution images of structures from the Earth's interior remain a major challenge for geophysics. The general objective of the proposed work is to develop the magnetotelluric (MT) method into such a tool with the deep imprints of active and fossil sutures zones (SZs) serving as the prime target. Associated with SZs are thrusts and shear zones which can penetrate the entire lithosphere. A fundamental results of the German deep drilling project (KTB) was that graphite enrichment on shear planes can cause high conductivity which is sustained over long time spans. With modern MT studies from the Namibian Damara Belt, it was possible to trace a fossil SZ as a zone of electrical anisotropy in the crust. In the short term, I intend to (i) soundly study this phenomenon with existing MT data sets from different SZs (ii) participate in new field experiments with a similar perspective (iii) further develop my imaging methods and combine these incorporate relevant geophysical data, such as seismic shear wave anisotropy, to derive a more integrated geodynamic interpretation. On a long term basis a new working group will focus on integrated MT - seismic modelling of major tectonic systems.