Figure F56. Normalized thermal demagnetization intensity decay curves for discrete samples, Hole U1415P. A. Samples with discrete, high unblocking temperature spectra (~70% of remanence lost within 40°C of the magnetite Curie temperature). B. Samples with lower unblocking temperature spectra and/or inflections in the demagnetization decay curves at temperatures between 400° and 500°C.
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