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

地球内部构造的高分辨率图像仍然是地球物理学面临的主要挑战。这项拟议工作的总体目标是将大地电磁(MT)方法发展成为一种以活动缝合带和化石缝合带(SZ)的深层印记为主要目标的工具。与SZ伴生的是可以贯穿整个岩石圈的逆冲和剪切带。德国深井钻探项目(KTB)的一个基本成果是，石墨在剪切面上的浓缩可以产生高导电性，这种导电性可以在很长一段时间内保持下去。根据纳米比亚达马拉带的现代大地电磁研究，有可能将SZ化石追踪为地壳中的电性各向异性带。在短期内，我打算(I)利用不同SZ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野外实验(Iii)进一步发展我的成像方法，并结合地震横波各向异性等相关地球物理数据，得出更完整的地球动力学解释。从长远来看，一个新的工作组将侧重于主要构造系统的综合大地电磁-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.