Dating of prehistoric caves sediments and flints using 10Be and 26Al in quartz from Tabun Cave (Israel):: Progress report

被引:19
|
作者
Boaretto, E [1 ]
Berkovits, D
Hass, M
Hui, SK
Kaufman, A
Paul, M
Weiner, S
机构
[1] Weizmann Inst Sci, ESER Dept, Kimmel Ctr Archaeol Sci, IL-76100 Rehovot, Israel
[2] Soreq Nucl Res Ctr, IL-81800 Yavne, Israel
[3] Weizmann Inst Sci, Dept Particle Phys, IL-76100 Rehovot, Israel
[4] Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel
[5] Weizmann Inst Sci, Dept Biol Struct, IL-76100 Rehovot, Israel
来源
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2000年 / 172卷
关键词
D O I
10.1016/S0168-583X(00)00349-9
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
There is an important need to develop additional dating methods beyond the C-14 limit and independent of thermoluminescence (TL) and electron spin resonance (ESR). We propose to apply the method of burial dating to prehistoric sites using the decay of in situ produced radioisotopes Be-10 and Al-26. The Tabun Cave, Mt. Carmel (Israel) has a sedimentary sequence which represents the type section for about the last 800,000 years in the Levant. The sediments in the cave are mainly of aeolian origin and are rich in quartz. Flint tools are also found in the sediments. Sediment samples and flint tools were selected from the same layer. Physical and chemical procedures to extract Be-10 and Al-26 atoms from the quartz fraction of the sediments and from the flint samples were developed, while measuring the natural Al levels as a monitor of the atmospheric component of the cosmogenic nuclides. AMS measurements were performed at the 14UD Pelletron Koffler Accelerator Laboratory, Weizmann Institute, and sensitivities of the order of 1 x 10(-14) in isotopic abundances for both Be-10 and Al-26 respectively (corresponding to similar to5 x 10(5) atoms) were obtained. First, measurements of a number of Tabun Cave sediment samples and flints show that Be-10 and Al-26 analyses have the potential for dating prehistoric cave sediments, provided problems relating to the presence of relatively large amounts of stable Al can be solved, as well as obtaining a better understanding of the burial history of the flints prior to being brought into the cave. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:767 / 771
页数:5
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