U-series dating of soda straw stalactites from excavated deposits: Method development and application to Blanche Cave, Naracoorte, South Australia

St Pierre, Emma, Zhao, Jian-xin, Feng, Yue-xing and Reed, Elizabeth (2012) U-series dating of soda straw stalactites from excavated deposits: Method development and application to Blanche Cave, Naracoorte, South Australia. Journal of Archaeological Science, 39 4: 922-930. doi:10.1016/j.jas.2011.10.027


Author St Pierre, Emma
Zhao, Jian-xin
Feng, Yue-xing
Reed, Elizabeth
Title U-series dating of soda straw stalactites from excavated deposits: Method development and application to Blanche Cave, Naracoorte, South Australia
Journal name Journal of Archaeological Science   Check publisher's open access policy
ISSN 0305-4403
1095-9238
Publication date 2012-04-01
Year available 2011
Sub-type Article (original research)
DOI 10.1016/j.jas.2011.10.027
Volume 39
Issue 4
Start page 922
End page 930
Total pages 9
Place of publication London, United Kingdom
Publisher Academic Press
Collection year 2012
Language eng
Formatted abstract
This study aimed to further test the method, reported by St Pierre et al. (2009), to develop robust chronologies of deposits in limestone caves through U/Th (Uranium/Thorium or U-Series) dating of soda straw stalactites. The chronology of fossil bearing deposits at Blanche Cave was further constrained with thermal ionisation mass spectrometry (TIMS) U/Th dating of 17 additional soda straw stalactite samples, and results were compared to recalibrated 14C ages of charcoal. The results support the assertion that soda straw stalactites can provide ages close to the time of sediment deposition and may be used as reliable chronological markers, particularly for periods reaching or beyond the radiocarbon dating limit. The application of an enhanced cleaning technique facilitated the reduction of detrital Th in samples, significantly increasing age accuracy and precision. Additionally U/Th age accuracy and precision was increased through the application of site-specific measured U/Th ratios to correct for the detrital 230Th component in samples.
Keyword Blanche Cave
Naracoorte South Australia
Limestone cave and rockshelter sites
Quatemary chronology
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online 11 November 2011

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
Official 2012 Collection
Centre for Microscopy and Microanalysis Publications
 
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