High-precision AMS 14C results on TIRI/FIRI turbidite

被引：29

作者：

Guilderson, TP ^{[1
]}

Southon, JR

Brown, TA

机构：

[1] Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94551 USA

[2] Univ Calif Santa Cruz, Dept Ocean Sci, Santa Cruz, CA 94596 USA

来源：

RADIOCARBON | 2003年 / 45卷 / 01期

关键词：

D O I：

10.1017/S0033822200032409

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Unleached aliquots of TIRI/FIRI turbidite were analyzed by accelerator mass spectronomy (AMS) over a timespan of 18 months. Individual analyses ranged from 18,090-18,245 yr BP with reported errors between 30-50 yr. The weighted average fraction modem (FM) of these 28 measurements is 0.10378 +/- 0.00008 (which equates to 18,199 +/- 8 yr BP) and the measurements show a I standard deviation scatter of 0.00044 (+/-35 yr). The fractional error of these results indicates reproducibility of individual measurements at the 4parts per thousand (1sigma) level, which is consistent with the quoted counting-statistics-based errors. Laboratories engaged in the determination of C-14 results at reasonably high precision should consider taking advantage of the TIRI and FIRI sample materials in the role of process standards. Additional suites of high-precision data are necessary to refine the accuracy of these sample materials.

引用

页码：75 / 80

页数：6

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