eEarth Discuss., 1, 51-62, 2006
www.electronic-earth-discuss.net/1/51/2006/
doi:10.5194/eed-1-51-2006
© Author(s) 2006. This work is licensed under the
Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.
 
22 Jun 2006
Review status
This discussion paper has been under review for the journal eEarth (eE). A final paper in eE is not foreseen.
A linear theory of physical properties in inhomogeneous sediments and its application to relative paleointensity determination
K. Fabian
Universität Bremen, FB Geowissenschaften, Postfach 330440, 28334 Bremen, Germany
LMU München, Department of Earth and Environmental Science, Theresienstr. 41/IV, 80333 Munich, Germany

Abstract. A linear model is developed to study the effect of variations in composition upon extensive physical properties of continuously deposited sediment sequences. By applying this model to natural and synthetic remanence acquisition, an optimal method of relative paleointensity determination is derived. The sediment is regarded as a mixture of independent components, each of which behaves uniformly in depth with respect to its physical properties. The concentration of each sediment component is assumed to independently vary linearly with an external "environmental" signal. Remanence acquisition in each sediment component is linear in external field and concentration of the component. It is demonstrated that in this case the ideal normalization procedure for relative paleointensity determination is to divide the natural remanent magnetization by a biased normalizer. Common magnetic cleaning techniques improve the relative paleointensity record by removing nonlinear behavior and by reducing the bias to the normalizer. The proposed linear sediment model for any extensive physical property clearly separates the influences of concentration of sediment components from those of environmental signals. It thus opens many possibilities for extensions to nonlinear models.

Citation: Fabian, K.: A linear theory of physical properties in inhomogeneous sediments and its application to relative paleointensity determination, eEarth Discuss., 1, 51-62, doi:10.5194/eed-1-51-2006, 2006.
 
Search eED
Discussion paper
PDF XML
Citation
Share