Middle Miocene eolian sediments on the southern Chinese Loess Plateau dated by magnetostratigraphy

作者：Wang, Bin; Zheng, Hongbo^*; He, Zhong; Wang, Ping; Kaakinen, Anu; Zhou, Xinying

来源：Palaeogeography, Palaeoclimatology, Palaeoecology, 2014, 411: 257-266.

DOI：10.1016/j.palaeo.2014.07.007

• Chinese Loess Plateau
• Neogene
• Eolian sediments
• Bahe Formation
• Geochemistry
• Grain size

We present the results of a magnetostratigraphic grain size and geochemical investigation, of a well-preserved sequence of eolian sediments of Miocene age at Duanjiapo, on the southern Chinese Loess Plateau. The paleomagnetic results demonstrate that the basal age of the studied interval is about 11 Ma. The results of the grain size and geochemical analyses show strong similarities between the eolian Miocene silts and the overlying Red Clay and loess units. This leads us to conclude that all formations have a similar eolian origin, although the Miocene silts include evidence of fluvial sediments derived from river originating in the Qinling Mountains, to the south of the study site. Our results indicate that the accumulation of eolian dust in the southern Chinese Loess Plateau area began at least 11 Ma ago.

• 出版日期2014-10-1
• 单位南京师范大学; 中国科学院古脊椎动物与古人类研究所; 西北农林科技大学; 南京大学; 中国科学院水利部水土保持研究所