Browsing Radiocarbon, Volume 46, Number 2 (2004) by Authors
New ΔR Values for the Southwest Pacific OceanPetchey, Fiona; Phelan, Matthew; White, J. Peter (Department of Geosciences, The University of Arizona, 2004-01-01)Delta-R results of known-age shells from the Solomon and Coral Seas and the northwest coast of New Ireland are presented. The results are too few to be conclusive but indicate that Delta-R in this region is variable. An average Delta-R value of 370 +/25 yr is recorded for a range of shell species from Kavieng Harbor, New Ireland, and is primarily attributed to weak equatorial upwelling of depleted 14C due to seasonal current reversals. In contrast, values from the Solomon and Coral Seas are lower (average Delta-R = 45 +/19 yr). Higher Delta-R values for some shellfish from these 2 seas is attributed to ingestion of 14C-depleted sediment by deposit-feeding species.