Isolation of paleofield information from the natural remanent magnetization of marine sediments using stratigraphic networks

• Applicant: Professor Dr. Karl Fabian
• Subject Area: Geophysics
• Term: from 2000 to 2003
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 5251770

Characteristics of the geomagnetic paleofield over the last 5 myrs in space and time were largely derived from marine magnetostratigraphic data. The acquisition of natural remanent magnetization in marine sediments is strongly influenced by a variety of factors other than the Earth`s field. The proposed work aims at isolating the geomagnetic information by means of stratigraphic networks which will be derived from multipara- meter data sets and newly adopted mathematical techniques to define a common high resolution timescale for a large number of regionally constraint marine paleomagnetic records.By modeling paleofield and non-field influences together as parametric filters of the paleomagnetic records, the strati- graphic network should allow to identify at the same time the filter parameters and the paleofield signal.The methods will be developed and tested on a subset of gravity cores recovered from an area north and east of the Canary Islands (EU project CANIGO). In addition to a high resolution paleofield record, the project should yield detailed insight into the remanent magnetization acquisition in marine sedimentary deposits.

• DFG Programme: Priority Programmes
• Subproject of: SPP 1097: Geomagnetic Variations: Spatio-Temporal Structure, Processes, and Effects on System Earth
• Participating Persons: Professor Dr. Ulrich Bleil; Professor Dr. Tilo von Dobeneck