新仙女木期黄河晋陕峡谷古风成沙层年代及其物质来源

张玉柱, 黄春长, 陈莹璐, 谭志海, 杨利荣, 张云翔, 邱海军, 刘波, 赵发珠

Age and provenance of Younger Dryas paleo-aeolian sandlayers in the Jin-Shaan Gorges of the Yellow River

Yuzhu ZHANG, Chunchang HUANG, Yinglu CHEN, Zhihai TAN, Lirong YANG, Yunxiang ZHANG, Haijun QIU, Bo LIU, Fazhu ZHAO

表3 黄河晋陕峡谷壶口至龙门段北桑峪晚更新世以来黄土—土壤剖面样品与其他沉积物磁化率对比

Tab. 3 A comparison of magnetic susceptibility between the samples of the Late Pleistocene and Holoceneloess-soil profile at the Beisangyu site (BSY) in the Hukou-Longmen reach in theJin-Shaan Gorges of the Yellow River and other sediments

沉积地层 低频磁化率(×10-8 m3/kg) 高频磁化率(×10-8 m3/kg) 频率磁化率(%) 古风成沙层上部 27.12 26.46 2.43 古风成沙层下部 28.54 26.38 7.57 马兰黄土层 34.65 33.24 4.07 现代河床相沙层 25.80 24.43 5.31 现代沙丘沙层 14.52 14.33 1.31