The ANTARES AMS facility at ANSTO

Fink, David; Hotchkis, M.A.C.; Hua, Quan; Jacobsen, Geraldine; Smith, A. M.; Zoppi, Ugo; Child, David; Mifsud, Charles; Gaast, H. van der; Williams, Alan; Martin, Williams

doi:10.1016/j.nimb.2004.04.025

Cited by 297 publications

(88 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pretreated samples were hydrolyzed to CO 2 using 85 % H 3 PO 4 , then converted to graphite using the Fe/ H 2 method (Hua et al 2001). AMS 14 C measurements were taken at ANSTO using the STAR facility (Fink et al 2004). Radiocarbon ages were converted to calendar years using OxCal 4.1 program (Bronk Ramsey 2009), Marine09 data (Reimer et al 2009), and a regional marine reservoir correction (DR) value of 4 ± 40 yrs based on the mean 14 C offset between the Marine09 curve and the known-age coral core from Abraham Reef (Druffel and Griffin 2004) for the period 1635-1950 AD.…”

Section: Radiocarbon Datingmentioning

confidence: 99%

Sediment accumulation, stratigraphic order, and the extent of time-averaging in lagoonal sediments: a comparison of 210Pb and 14C/amino acid racemization chronologies

et al. 2014

View full text Add to dashboard Cite

Carbon-14 calibrated amino acid racemization ( 14 C/AAR) data and lead-210 ( 210 Pb) data are used to examine sediment accumulation rates, stratigraphic order, and the extent of time-averaging in sediments collected from the One Tree Reef lagoon (southern Great Barrier Reef, Australia). The top meter of lagoonal sediment preserves a stratigraphically ordered deposit spanning the last 600 yrs. Despite different assumptions, the 210 Pb and 14 C/AAR chronologies are remarkably similar indicating consistency in sedimentary processes across sediment grain sizes spanning more than three orders of magnitude (0.1-10 mm). Estimates of long-term sediment accumulation rates range from 2.2 to 1.2 mm yr -1 . Molluscan timeaveraging in the taphonomically active zone is 19 yrs, whereas below the depth of final burial (*15 cm), it is *110 yrs/5 cm layer. While not a high-resolution paleontological record, this reef lagoon sediment is suitable for paleoecological studies spanning the period of Western colonization and development. This sedimentary deposit, and others like it, should be useful, albeit not ideal, for quantifying anthropogenic impacts on coral reef systems.

show abstract

Section: Radiocarbon Datingmentioning

confidence: 99%

Sediment accumulation, stratigraphic order, and the extent of time-averaging in lagoonal sediments: a comparison of 210Pb and 14C/amino acid racemization chronologies

et al. 2014

View full text Add to dashboard Cite

show abstract

“…However, this effect is negligible for our samples because they are quite modern (younger than 1940 A.D.). 14 C measurements were conducted on the 2MV HVEE "STAR" AMS in the Institute for Environmental Research, Australian Nuclear Science and Technology Organisation (ANSTO) (Fink et al, 2004). Calcite 14 C measurements were normalized to oxalic acid standards (HOxI and HOxII), which were interspersed for each run.…”

Section: C Measurementsmentioning

confidence: 99%

Hydrological control of the dead carbon fraction in a Holocene tropical speleothem

Griffiths

Fohlmeister

Drysdale

et al. 2012

Quaternary Geochronology

Self Cite

View full text Add to dashboard Cite

a b s t r a c tOver the past decade, a number of speleothem studies have used radiocarbon ( 14 C) to address a range of palaeoclimate problems. These have included the use of the bomb pulse 14 C to anchor chronologies over the last 60 years, the combination of U-Th and 14 C measurements to improve the radiocarbon agecalibration curve, and linking atmospheric 14 C variations with climate change. An issue with a number of these studies is how to constrain, or interpret, variations in the amount of radioactively dead carbon (i.e. the dead carbon fraction, or DCF) that reduces radiocarbon concentrations in speleothems. In this study, we use 14 C, stable-isotopes, and trace-elements in a U-Th dated speleothem from Flores, Indonesia, to examine DCF variations and their relationship with above-cave climate over the late Holocene and modern era. A strong association between the DCF and hydrologically-controlled proxy data suggests that more dead carbon was being delivered to the speleothem during periods of higher cave recharge (i.e. lower d 18 O, d 13 C and Mg/Ca values), and hence stronger summer monsoon. To explore this relationship, we used a geochemical soil-karst model coupled with 14 C measurements through the bomb pulse to disentangle the dominant components governing DCF variability in the speleothem. We find that the DCF is primarily controlled by limestone dissolution associated with changes in open-versus closed-system conditions, rather than kinetic fractionation and/or variations in the age spectrum of soil organic matter above the cave. Therefore, we infer that periods of higher rainfall resulted in a higher DCF because the system was in a more closed state, which inhibited carbon isotope exchange between the karst water dissolved inorganic carbon and soil-gas CO 2 , and ultimately led to a greater contribution of dead carbon from the bedrock.Published by Elsevier B.V.

show abstract

“…Precision and accuracy were firstly determined for the AMS machine alone by measuring large IAEA-C7 (Le Clercq et al 1998), HOxI, and HOxII standards (Stuiver 1993) prepared at the Australian Nuclear Science and Technology Organization (ANSTO) (Fink et al 2004;Qua et al 2001). …”

Section: Precision and Accuracymentioning

confidence: 99%

Performance Evaluation of the New AMS System at Accium BioSciences

et al. 2007

View full text Add to dashboard Cite

ABSTRACT.A new compact accelerator mass spectrometry (AMS) system dedicated to the measurement of radiocarbon has been commissioned at the Accium BioSciences headquarters in Seattle. The entire facility (including ancillary laboratories for the preparation of graphite targets) has been designed to handle samples with a wide range of 14 C concentrations. In this paper, we discuss the technical details of the new facility and present performance test results demonstrating state-of-theart capabilities. In particular, modern samples can be readily measured with 0.3% precision and accuracy, machine background levels are consistently in the low 10 -16 ( 14 C/ 12 C), and chemical background is approximately equivalent to a fraction of modern of 0.004. In addition, when 100-times-modern samples were processed, no increase in background was observed, either during sample processing or during AMS measurement. This corresponds to a dynamic range for 14 C analysis of 6 orders of magnitude.

show abstract

The ANTARES AMS facility at ANSTO

Cited by 297 publications

References 20 publications

Sediment accumulation, stratigraphic order, and the extent of time-averaging in lagoonal sediments: a comparison of 210Pb and 14C/amino acid racemization chronologies

Sediment accumulation, stratigraphic order, and the extent of time-averaging in lagoonal sediments: a comparison of 210Pb and 14C/amino acid racemization chronologies

Hydrological control of the dead carbon fraction in a Holocene tropical speleothem

Performance Evaluation of the New AMS System at Accium BioSciences

Contact Info

Product

Resources

About