Abstract
An investigation of rock magnetic properties using the temperature-dependence of susceptibility (TDS) and X-ray diffraction (XRD) analyses was conducted on specimens of the last glacial loess (L1) and the last interglacial soil (S1) along a NW-SE transect of the loess plateau in China. Parallel subsamples were used for different heating/cooling runs in an argon atmosphere to detail the TDS characteristics. Also, “thermal pre-treatment” was carried out for investigating magnetic mineral changes under oxidizing conditions. We find that the TDS behavior in the temperature interval of 250–500°C is useful in identifying the pedogenic maghemitized magnetite in both loess and paleosol, and that it can be used as a proxy of the degree of pedogenesis, which is closely linked to climatic conditions.
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