Magnetostratigraphy and Provenance of the Qingzhou Loess in
详细信息
- 责任者：Peng Shuzhen (Department of Tourism ; Resources and Environment ; Taishan University ; Tai’an 271021 ; China) ; Zhu Lijun
- 刊名：Arid Land Geography
- 出版年：2010
- 卷期：33(6)
- 关键词：中更新世 ; Middle Pleistocene ; 光释光测年 ; optical stimulated luminescence dating ; 黄土 ; loess ; 山东 ; Shandong Province
- 页码：p.947-953
- 图表：4 illus., 2 tables, 24 refs.
- 分类号：1400
- issnNo：ISSN1000-6060
- isbnNo：CN65-1103/X
摘要
This paper dated the Qingzhou loess profile with magnetostratigraphic and optical stimulated luminescence(OSL) methods and further investigated its main provenances with the mineralogical methods. The results show that the Brunhes/Matuyama (B/M) reversal boundary is not recognized, suggesting a basal age of younger than 0.78 Ma. Extrapolations by sedimentation rates based on the upper part depositional rate from the OSL age yield a basal age of about 0.5 Ma.Until now, older loess deposits have been no reported on the northern side of the central Shandong mountainous region. The results of the paper indicate that the dust deposits in the area may be origin since the Middle Pleistocene. The basal age of Qingzhou loess is approximately synchronous with the Xiashu loess in the middle-lower researches of Yangtze River.