Independent Component Analysis of sedimentary rock-magnetic data
Norbert Marwan, J. Kurths, U. J. Schwarz · EAEJA · 2003
Norbert Marwan ([email protected]), April 2003 One step on the way for the understanding of the variations of the Earth‘ magnetic field is the study of the past variations. These past variations can be found in various geological archives. One possibility are lake sediments in which the magnetic minerals can store information about the direction and the intensity of the Earth‘ magnetic field. However, when we measure the magnetic properties of these sediments, the measurements will also contain a large climatic impact. For example, the concentration of the magnetic minerals depends on the weathering processes which on the other side depend on the climate. Finally, we always measure a mixture of climate and real Earth‘ magnetic field signals when we measure rock magnetic parameters. Since we are interested only in the information about the Earth‘ magnetic field, we need a method which can separate these mixtures. In the following we focus on the independent component analysis which could be successfully applied to rock magnetic data. Independent Component Analysis of Sedimentary Rock Magnetic Data