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Separation of multi-component NRM: A general method |
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| Authors: | Kenneth A Hoffman Ron Day |
| Institution: | aPhysics Department, California Polytechnic State University, San Luis Obispo, CA 93407 U.S.A. bDepartment of Geological Sciences, University of California, Santa Barbara, CA 93106 U.S.A. |
| Abstract: | A method is presented which can successfully isolate components of remanent magnetization having intermediate relative stability in a single rock sample which contains any number of remanence components with overlapping coercivity or blocking temperature spectra. The approach consists of analysis of the path swept out by the vector destroyed during a detailed alternating field or thermal demagnetization run. The point of intersection determined for any two neighboring great circle segments identified in such a difference vector path defines the direction of such a component. Samples cored from a fragment of a Jurassic pillow basalt, shown to contain several components of magnetization, serve to illustrate the utility of the method for the case when the Zijderveld approach is unsuccessful. |
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