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

页码：1054 / 1057

页数：4

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