Radiocarbon dating of alkenones from marine sediments:: II.: Assessment of carbon process blanks

被引：17

作者：

Mollenhauer, G ^{[1
]}

Montluçon, D ^{[1
]}

Eglinton, TI ^{[1
]}

机构：

[1] Woods Hole Oceanog Inst, Dept Marine Chem & Geochem, Woods Hole, MA 02543 USA

来源：

RADIOCARBON | 2005年 / 47卷 / 03期

关键词：

D O I：

10.1017/S0033822200035190

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：

We evaluate potential process blanks associated with radiocarbon measurement of microgram to milligram quantities of alkenones at the National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) facility. Two strategies to constrain the contribution of blanks to alkenone C-14 dates were followed: 1) dating of samples of known age and 2) multiple measurements of identical samples. We show that the potential contamination associated with the procedure does not lead to a systematic bias of the results of alkenone dating to either younger or older ages. Our results indicate that alkenones record Delta C-14 of ambient DIC with an accuracy of approximately 10 parts per thousand. A conservative estimate of measurement precision is 17 parts per thousand for modern samples. Alkenone C-14 ages are expected to be reliable within 500 yr for samples younger than 10,500 C-14 yr.

引用

页码：413 / 424

页数：12

共 20 条

[1]

[Anonymous], PALEOCEANOGRAPHY

[2] Corrections for contamination background in AMS C-14 measurements [J].

Brown, TA ;

Southon, JR .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1997, 123 (1-4) :208-213

[3] Gas chromatographic isolation of individual compounds from complex matrices for radiocarbon dating [J].

Eglinton, TI ;

Aluwihare, LI ;

Bauer, JE ;

Druffel, ERM ;

McNichol, AP .

ANALYTICAL CHEMISTRY, 1996, 68 (05) :904-912

[4] Variability in radiocarbon ages of individual organic compounds from marine sediments [J].

Eglinton, TI ;

BenitezNelson, BC ;

Pearson, A ;

McNichol, AP ;

Bauer, JE ;

Druffel, ERM .

SCIENCE, 1997, 277 (5327) :796-799

[5] Testing the direct effect of CO2 concentration on a bloom of the coccolithophorid Emiliania huxleyi in mesocosm experiments [J].

Engel, A ;

Zondervan, I ;

Aerts, K ;

Beaufort, L ;

Benthien, A ;

Chou, L ;

Delille, B ;

Gattuso, JP ;

Harlay, J ;

Heemann, C ;

Hoffmann, L ;

Jacquet, S ;

Nejstgaard, J ;

Pizay, MD ;

Rochelle-Newall, E ;

Schneider, U ;

Terbrueggen, A ;

Riebesell, U .

LIMNOLOGY AND OCEANOGRAPHY, 2005, 50 (02) :493-507

[6] Radiocarbon dating of diatom-bound organic compounds [J].

Ingalls, AE ;

Anderson, RF ;

Pearson, A .

MARINE CHEMISTRY, 2004, 92 (1-4) :91-105

[7] TIC, TOC, DIC, DOC, PIC, POC - UNIQUE ASPECTS IN THE PREPARATION OF OCEANOGRAPHIC SAMPLES FOR C-14 AMS [J].

MCNICHOL, AP ;

OSBORNE, EA ;

GAGNON, AR ;

FRY, B ;

JONES, GA .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1994, 92 (1-4) :162-165

[8]

McNichol AP, 2001, RADIOCARBON, V43, P313

[9] Asynchronous alkenone and foraminfera records from the Benguela Upwelling System [J].

Mollenhauer, G ;

Eglinton, TI ;

Ohkouchi, N ;

Schneider, RR ;

Müller, PJ ;

Grootes, PM ;

Rullkötter, J .

GEOCHIMICA ET COSMOCHIMICA ACTA, 2003, 67 (12) :2157-2171

[10]

MOLLENHAUER G, 2005, PALEOCEANOGRAPHY, V20

← 1 2 →