期刊
HOLOCENE
卷 22, 期 12, 页码 1481-1489出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/0959683612449755
关键词
Namaqualand; radiocarbon calibration; reservoir corrections; southwestern Cape; upwelling
In order to calibrate radiocarbon ages based on samples with a marine carbon component it is important to know the marine carbon reservoir correction or Delta R value. This study measured the Delta R on both known-age pre-bomb marine shells and paired marine and terrestrial samples from two regions on the west coast of South Africa: the southwestern Cape and Namaqualand. Pooling the data by region produces Delta R values that are similar enough to use a west coast weighted mean Delta R of 146 +/- 85 C-14 years to correctly calibrate marine shell or mixed marine and terrestrial C-14 ages. There are however temporal differences in Delta R throughout the Holocene, which we compare with proxy data for upwelling and sea surface temperatures.
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