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Investigation of the magnetic and dielectric properties and their anisotropy of salt rocks

盐岩的磁、介电特性及其各向异性研究

基本信息

批准号：
243619607
负责人：
Dr. Volkmar Schmidt
金额：
--
依托单位：
Institut für Geophysik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2013
资助国家：
德国
起止时间：
2012-12-31 至 2016-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/243619607?language=en
关键词：
Investigation magnetic dielectric properties their

项目摘要

Salt rocks are an essential resource and play an important role in tectonic processes due to their special mechanical properties. Moreover, cavities in salt formations are used as storage and depository volumes for different materials. Knowledge of the formation, history, state and dynamics of salt rocks are therefore of great interest. Investigations of the rock fabric can give information on the internal structure and the deformation of salt deposits. A common method to characterize the rock fabric is measurement of the anisotropy of magnetic susceptibility (AMS). The AMS is generated by alignment of mineral grains. The advantages of the AMS method is the fast measurement and the analysis of large rock samples. It is often applied to rocks with a high content of ferromagnetic minerals.The aim of this project is the application of the AMS method to weakly magnetic salt rocks. To this end, the minerals that dominate the magnetic properties and generate a magnetic anisotropy are identified. Then the relationships between mineral fabric, chemical composition and magnetic properties are studied. This will allow for conclusions, how deformed zones and facies changes can be characterized by magnetic measurements. A further aim of this project is the examination of the dielectric properties of salt rocks. These properties govern the propagation of electromagnetic waves, which are commonly used to explore structures in salt deposits. In order to reliably combine the results of the different analyses, the measurements of physical properties, chemical properties, and fabric should be done using the same samples. The results of this project can help to develop novel methods to investigate the deformation of salt deposits, which can be decisive for their utilization.

盐岩因其特殊的力学性质，在构造过程中起着重要的作用。此外，盐层中的空洞被用作储存和存放不同物质的空间。因此，了解盐岩的形成、历史、状态和动力学是很有意义的。对岩石组构的研究可以提供有关盐矿内部结构和变形的信息。表征岩石组构的常用方法是测量磁化率的各向异性。AMS是由矿物颗粒排列产生的。AMS方法的优点是可以快速测量和分析大型岩石样品。它常用于铁磁性矿物含量高的岩石。本项目的目的是将AMS方法应用于弱磁性盐岩。为此，确定了主导磁性和产生磁各向异性的矿物。然后研究了矿物织物、化学成分与磁性能之间的关系。这将允许得出结论，变形带和相变化如何通过磁测量来表征。该项目的另一个目的是研究盐岩的介电特性。这些特性决定了电磁波的传播，而电磁波通常被用来探测盐矿中的结构。为了可靠地结合不同分析的结果，物理性质、化学性质和织物的测量应使用相同的样品。该项目的研究成果有助于开发研究盐矿变形的新方法，这对盐矿的利用具有决定性意义。