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

被引：6
|
作者：
Ali, Naveed [1 ,2 ]
Shen, Chengde [3 ]
Ding, Ping [3 ]
Fu, Dongpo [1 ,2 ]
Wang, Ning [3 ]
Ding, Xingfang [1 ,2 ]
Jiang, Zhengyuan [1 ,2 ]
Liu, Kexin [1 ,2 ]
机构：
[1] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China
[2] Peking Univ, Inst Heavy Ion Phys, Beijing 100871, Peoples R China
[3] Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2010年 / 268卷 / 7-8期
关键词：
Accelerator mass spectrometry; Loess; Be-10; concentration; Paleoclimate; CHINESE LOESS; MAGNETIC-SUSCEPTIBILITY; STRATIGRAPHY; RECORD;
D O I：
10.1016/j.nimb.2009.10.096
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
A loess profile in Donglingshan site (40 degrees 02'N, 115 degrees 27'E) near Beijing was chosen to study the loess formation process and paleo-climate variation. Thirty eight samples were collected and analyzed for C-14, Be-10 as well as MS. TOC and delta C-13. Based on C-14 measurements, we established a time scale for this loess profile during Holocene. The averaged Be-10 deposition flux was found to be 4.87 x 10(6) atoms/cm(2) year. This is similar to the flux of 4.2 x 10(6) atoms/cm(2) year estimated for Chinese Loess Plateau in central China. High Be-10 concentrations of 3.85-5.66 x 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 Be-10 and reflect the similar paleo-climate information. TOC and delta C-13 suggest that the vegetation around Donlingshan area was C-3 type plants during entire Holocene. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：1054 / 1057
页数：4
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