AMS measurements of 10Be and 14C in loess profile at Donglingshan, Beijing

• Published in: Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Vol. 268; no. 7; pp. 1054 - 1057
• Main Authors: Ali, Naveed, Shen, Chengde, Ding, Ping, Fu, Dongpo, Wang, Ning, Ding, Xingfang, Jiang, Zhengyuan, Liu, Kexin
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.04.2010
• Subjects: 10Be concentration; Accelerator mass spectrometry; Loess; Paleoclimate; Loess; Paleoclimate; Accelerator mass spectrometry; 10Be concentration
• ISSN: 0168-583X; 1872-9584
• DOI: 10.1016/j.nimb.2009.10.096

A loess profile in Donglingshan site (40°02′N, 115°27′E) near Beijing was chosen to study the loess formation process and paleo-climate variation. Thirty eight samples were collected and analyzed for 14C, 10Be as well as MS, TOC and δ 13C. Based on 14C measurements, we established a time scale for this loess profile during Holocene. The averaged 10Be deposition flux was found to be 4.87 × 10 6 atoms/cm 2 year. This is similar to the flux of 4.2 × 10 6 atoms/cm 2 year estimated for Chinese Loess Plateau in central China. High 10Be concentrations of 3.85–5.66 × 10 8 atoms/g for the samples in layer 23–39 cm from 2965 to 528 years BP suggest a warm and humid weather during this period. MS values have similar variation with 10Be and reflect the similar paleo-climate information. TOC and δ 13C suggest that the vegetation around Donlingshan area was C 3 type plants during entire Holocene.