Records of the Holocene Sandstorm Activity in the Yellow River Floodplain:a case study of GDZ Profile in Upper Reaches of the Yinhe River

Key words: 
• Upper reaches of the Yinghe River /
• Yellow River /
• floodplain /
• sandstorm activity

Abstract: A Holocene loesssoil profile is studied on the river terraces, hills and plateaus of the east piedmont of the Songshan Mountain in the upper reaches of the Yinghe River as a tributary of the Huihe River. Higher resolution proxy data of magnetic susceptibility, particle size distribution and >0.063 mm% were obtained from the profile. Chronology framework of the data series was decided by a stratigraphic correlation. Based on analysis of characteristic of magnetic susceptibility and grainsize of the loesssoil profile, the paper discussed the relation of the grainsize distribution of loesssoil sequences in the upper reaches of the Yinghe River and the sandstorm activity in the Yellow River floodplain, then probed into the characteristic of the sandstorm activity during the Holocene climatic various stages in the Yellow River floodplain. During the late Holocene (3100～0 a B.P.) while the climate was tended to become arid, the flooding frequency in the lower riches of the Yellow River was increasing, the area of dust activity extending, the sandstorm activity intensity was more strong.