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2 黄河晋陕峡谷壶口至龙门段北桑峪晚更新世以来黄土—土壤剖面样品的OSL测年结果

Tab. 2 OSL dating results of the samples of the Late Pleistocene and Holocene loess-soil profile at the Beisangyu site (BSY) in the Hukou-Longmen reach in the Jin-Shaan Gorges of the Yellow River

样品 编号 地层 层位 深度 (cm) U (ppm) Th (ppm) K (%) 含水量 (%) 等效剂量 De (Gy) 环境剂量 Dy (Gy ka-1) 年龄 (ka) BSY-1 古风成沙层 22.5 1.02±0.05 4.97±0.17 2.16±0.06 14.0 30.39±1.64 2.64±0.06 11.6±0.7 BSY-2 古风成沙层 52.5 0.81±0.05 3.89±0.14 2.21±0.06 14.0 27.98±1.02 2.34±0.06 11.9±0.5 BSY-3 古风成沙层 497.5 1.10±0.06 4.72±0.17 2.18±0.06 14.0 32.02±1.02 2.55±0.06 12.5±0.5 BSY-4 马兰黄土层 502.5 2.46±0.10 11.30±0.32 1.76±0.06 15.8 36.73±1.20 2.92±0.07 12.6±0.5