Dating oxalate minerals 20-45 ka

Alan Watchman; S. O'Connor; Rhys Jones

doi:10.1016/j.jas.2004.10.007

Dating oxalate minerals 20-45 ka

Alan Watchman^*, S. O'Connor, Rhys Jones

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

45 Citations (Scopus)

Abstract

We report a test of the dating of oxalate minerals near the radiocarbon limit. Oxalate salts are used for estimating the ages of prehistoric rock paintings and carvings, but uncertainties have existed about the origin of the carbon they contain. Sediments at the Carpenter's Gap 1 rockshelter, Western Australia, have been conventionally radiocarbon dated at about 34000 years old, providing independent evaluation for the ages of buried oxalate crusts associated with them. Accelerator mass spectrometry radiocarbon (AMS ¹⁴C) assays of carbon in rapidly oxidized oxalate ions from these crusts produce age estimates marginally older than the covering sediments.

Original language	English
Pages (from-to)	369-374
Number of pages	6
Journal	Journal of Archaeological Science
Volume	32
Issue number	3
DOIs	https://doi.org/10.1016/j.jas.2004.10.007
Publication status	Published - Mar 2005

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10.1016/j.jas.2004.10.007

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title = "Dating oxalate minerals 20-45 ka",

abstract = "We report a test of the dating of oxalate minerals near the radiocarbon limit. Oxalate salts are used for estimating the ages of prehistoric rock paintings and carvings, but uncertainties have existed about the origin of the carbon they contain. Sediments at the Carpenter's Gap 1 rockshelter, Western Australia, have been conventionally radiocarbon dated at about 34000 years old, providing independent evaluation for the ages of buried oxalate crusts associated with them. Accelerator mass spectrometry radiocarbon (AMS 14C) assays of carbon in rapidly oxidized oxalate ions from these crusts produce age estimates marginally older than the covering sediments.",

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AB - We report a test of the dating of oxalate minerals near the radiocarbon limit. Oxalate salts are used for estimating the ages of prehistoric rock paintings and carvings, but uncertainties have existed about the origin of the carbon they contain. Sediments at the Carpenter's Gap 1 rockshelter, Western Australia, have been conventionally radiocarbon dated at about 34000 years old, providing independent evaluation for the ages of buried oxalate crusts associated with them. Accelerator mass spectrometry radiocarbon (AMS 14C) assays of carbon in rapidly oxidized oxalate ions from these crusts produce age estimates marginally older than the covering sediments.

KW - AMS radiocarbon

KW - Carpenter's Gap 1 rockshelter

KW - Crusts

KW - Kimberley

KW - Oxalate

KW - Western Australia

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DO - 10.1016/j.jas.2004.10.007

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VL - 32

SP - 369

EP - 374

JO - Journal of Archaeological Science

JF - Journal of Archaeological Science

IS - 3

ER -

Dating oxalate minerals 20-45 ka

Abstract

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