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Earth, Planets and Space
Fig. 6 | Earth, Planets and Space

Fig. 6

From: Matuyama–Brunhes geomagnetic reversal record and associated key tephra layers in Boso Peninsula: extraction of primary magnetization of geomagnetic fields from mixed magnetic minerals of depositional, diagenesis, and weathering processes

Fig. 6

An example of thermal demagnetization of three-component IRM experiments based on Lowrie (1990). Bottom diagram shows the magnetization for high (red circles; 0.4–2.5 T), medium (pink triangles; 0.12–0.4 T) and low (blue rectangles; 0–0.12 T) coercivity components after each heating step in air. Middle diagram shows the magnetization removed at each heating step for high (red), medium (pink) and low (blue) coercivity components. Top diagram shows the magnetic susceptibility measured after each heating step

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