Electromagnetic study of the Trans-European suture zone

横贯欧洲缝合带的电磁研究

• 批准号: 5406264
• 负责人: Dr. Heinrich Brasse
• 金额: --
• 依托单位: BGR-Dienstbereich Berlin
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2003
• 资助国家: 德国
• 起止时间: 2002-12-31 至 2009-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5406264?language=en
• 关键词: Electromagnetic; study; Trans; European; suture

We propose a research project to study the deep geo-electrical structure of the crust and upper mantle across the central segment of the Trans-European Suture Zone (TESZ) in Pomerania/Poland with geo-electromagnetic methods. The TESZ constitutes one of the most prominent tectonic boundaries in Europe and separates the Precambrian East European Platform and Baltic shield from the Paleozoic mountain belts of Central and Western Europe. It has been extensively studied by a variety of seismological methods, but little is known about the electrical structure of the subsurface. We therefore propose an experiment consisting of two profiles crossing the suture zone, densely occupied by an array of broadband magnetotelluric sites, and extending from the Baltic Sea in Poland to the Variscan Front in Eastern Germany. We intend to evaluate the full magnetotelluric/magnetovariational data set by employing new modelling and inversion algorithms in 2D and 3D, including anisotropy. The study aims at providing insights into the layering of Paleozoic sediments, the geometry of the Polish-North German conductivity anomaly, with a special emphasis on a distinction of sedimentary troughs and black shales as causes for anomalous transfer functions, structures of the crystalline basement, and a possible anisotropy in the deep crust or upper mantle.

本文提出了一个利用地电方法研究波美拉尼亚/波兰跨欧洲缝合带中段地壳和上地幔深部地电结构的研究项目。特提斯区是欧洲最突出的构造边界之一，它将前寒武纪的东欧地台和波罗的海地盾与中欧和西欧的古生代山脉带分隔开来。它已被广泛研究的各种地震学方法，但鲜为人知的是地下的电结构。因此，我们提出了一个实验，包括两个剖面穿过缝合带，密集占据了一系列宽带大地电磁站点，并从波罗的海在波兰的华力西前线在东部德国。我们打算通过采用新的建模和反演算法在2D和3D，包括各向异性评估完整的大地电磁/磁变数据集。该研究旨在提供深入了解古生代沉积物的分层，波兰-北德国电导率异常的几何形状，特别强调沉积槽和黑色页岩的区别，作为异常转换函数，结晶基底结构的原因，以及地壳深部或上地幔可能的各向异性。

项目成果

Electromagnetic images of the deep structure of the Trans‐European Suture Zone beneath Polish Pomerania

波兰波美拉尼亚下方跨欧洲缝合带深层结构的电磁图像

• DOI: 10.1029/2008gl034610
• 发表时间: 2008
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: H. Brasse;V. Cerv;N. Hoffmann;J. Jankowski;W. Jozwiak;A. Kreutzmann;A. Neska;N. Palshin;L. Pedersen;M. Smirnov;E. Sokolova;I. M. Varentsov
• 通讯作者: I. M. Varentsov