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1988•Geophysical Research LettersRequires access

NRM: IRM(S) demagnetization plots; An aid to the interpretation of natural remanent magnetization

Margaret T. Fuller, S. M. Cisowski, Melissa. Hart, R. Haston, E. Schmidtke, Richard D. Jarrard

Open publisher page 84 citations

Abstract

AF demagnetization of thermoremanent magnetization (TRM) and saturation isothermal remanent magnetization (IRM(s)) are used to establish diagnostic criteria for primary TRM and for secondary magnetization in igneous rocks. In applying the approach to the interpretation of natural remanent magnetization (NRM), the demagnetization of IRM(s) documents the nature of the magnetic phases in the rock, while the demagnetization of the NRM gives information about the process of magnetization. The ratio of NRM : IRM (s) measures the efficiency of the magnetization process.

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What this paper is about

AF demagnetization of thermoremanent magnetization (TRM) and saturation isothermal remanent magnetization (IRM(s)) are used to establish diagnostic criteria for primary TRM and for secondary magnetization in igneous rocks. In applying the approach to the interpretation of natural remanent magnetization (NRM), the demagnetization of IRM(s) documents the nature of the magnetic phases in the rock, while the demagnetization of the NRM gives information about the process of magnetization. The ratio of NRM : IRM (s) measures the efficiency of the magnetization process.

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Available abstract

AF demagnetization of thermoremanent magnetization (TRM) and saturation isothermal remanent magnetization (IRM(s)) are used to establish diagnostic criteria for primary TRM and for secondary magnetization in igneous rocks. In applying the approach to the interpretation of natural remanent magnetization (NRM), the demagnetization of IRM(s) documents the nature of the magnetic phases in the rock, while the demagnetization of the NRM gives information about the process of magnetization. The ratio of NRM : IRM (s) measures the efficiency of the magnetization process.

Key concepts: Natural remanent magnetization, Demagnetizing field, Remanence, Magnetization, Rock magnetism, Thermoremanent magnetization, Geology, Paleomagnetism

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