SC4: Rock magnetic methods in sedimentology
Course leaders: Anne-Christine da Silva (University of Liège, Belgium), Balazs Bradak (Universidad de Burgos, Spain), Jacek Grabowski (Polish Geological Institute, Poland), František Hrouda (AGICO Ltd. and Charles University, Czech Republic), Martin Chadima (AGICO Ltd. and The Czech Academy of Sciences, Czech Republic)
Over the last few decades, the use of rock magnetic methods in Earth Sciences has expanded dramatically. Due to the sensitivity of the state-of-the-art instruments, the rock magnetic measurements are nowadays applicable to virtually any rock type, including those showing magnetism so weak that they are commonly considered as non-magnetic. The benefits of rock magnetic methods include high sensitivity, rapidity, ease of sample preparation, non- destructiveness, the ability to sense grain-size variation. The objective of this course is to provide an overview of rock magnetic methods commonly used in sedimentological research. The course will consist of five blocks covering the following topics: (1) introduction to rock magnetism and the significance of magnetic proxy parameters; (2) magnetic fabric of sediments and its application to decipher flow direction, degree of vertical compaction and deformation; (3) rock magnetic methods applied to aeolian sediments and loess/paleosol deposits; (4) magnetic geochronology studied by polarity-reversal magnetostratigraphy; (5) magnetic cyclostratigraphy as studied by astronomically-forced variations on rock magnetic parameters. The course will be concluded by a practical demonstration of measurements derived from the case studies.