Number of the records: 1
Recent advances in anisotropy of magnetic remanence: New software and practical examples
- 1.
SYSNO ASEP 0379701 Document Type A - Abstract R&D Document Type The record was not marked in the RIV R&D Document Type Není vybrán druh dokumentu Title Recent advances in anisotropy of magnetic remanence: New software and practical examples Author(s) Chadima, Martin (GLU-S) RID, SAI Source Title Contributions to Geophysics & Geodesy - ISSN 1335-2806
-, special issue (2012), s. 59-60Number of pages 2 s. Publication form WWW - WWW Action Castle meeting New Trends in Geomagnetism : Paleo, rock and environmental magnetism/13./ Event date 17.06.2012-23.06.2012 VEvent location Zvolen Country SK - Slovakia Event type WRD Language eng - English Country SK - Slovakia Keywords magnetic susceptibility ; anisotropy ; anisotropy of magnetic susceptibility Subject RIV DE - Earth Magnetism, Geodesy, Geography Institutional support GLU-S - RVO:67985831 Annotation A very effective means of rock fabric analysis is based on the anisotropic magnetic properties, most commonly magnetic susceptibility. While anisotropy of magnetic susceptibility (AMS) is very fast and precise, it may, in certain cases, face some limitations because it reflects the sum of preferred orientation of all rock-constituent minerals. This limitation can be overcome using methods based on the magnetic remanence (Jackson 1991, Hirt 2007). The main applications of anisotropy of magnetic remanence (AMR) are i) distinguishing between the whole-rock magnetic fabric and magnetic fabric carried solely by ferromagnetic (s.l.) minerals (e.g. Hrouda 2002), ii) identifying inverse AMS fabric carried by single-domain magnetite grains (e.g. Chadima 2008); iii) assessment how the preferred orientation of ferromagnetic minerals affects the characteristic remanent magnetization of a rock (e.g. Bilardello 2009). All AMR techniques require an artificial magnetization – the most common being anhysteretic and isothermal remanent magnetizations – to be imparted along a set of independent directions. Various magnetization schemes have been proposed. We present a new hardware/software (ARem2W program) solution which includes 3-, 6-, 12-, and 15-direction designs. The user is guided through the measurement design and as soon as all necessary directions are measured, AMR tensor is calculated and expressed as the principal AMR directions (with respective confidence ellipses) together with various quantitative AMR parameters. The AMR data can be treated the same way as the AMS data and processed using, e.g., Anisoft software by Agico. The real examples demonstrating how the AMR can be used in solving various problems in magnetic fabric interpretation are discussed. Workplace Institute of Geology Contact Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Year of Publishing 2013
Number of the records: 1