The spatial discrepancy records of Matuyama-Gauss polarity reversal in Chinese loess

Previous paleomagnetic studies have shown that the records of Matuyama-Gauss(M/G) reversal event in Chinese loess are asynchronous, some located in loess, while the others located in red clay. This phenomenon will partially lead to the uncertainties in reconstructing the chronology of loess and correlating loess climatic proxies with marine sediments. To clarify our knowledge on the M/G reversal in loess, some representative section studies on the M/G reversal are carefully analyzed in this paper, using the magnetic susceptibility-depth curve to synthesize the different sections. Comprehensive results show that M/G reversal is generally recorded in loess L₃₃ layer, suggesting that the asynchronous feature of M/G reversal record in loess is possibly attributed to the different loess stratigraphic division schemes. According to this idea, the stratigraphic classification scheme of the classic Luochuan and Xifeng loess is partially modified. Finally, the records of M/G reversal in Chinese loess-paleosol are further compared with that of the marine sediments. The perspective of using ¹⁰Be to trace the M/G polarity reversal in loess is briefly introduced.