Radiocarbon Reservoir Ages and Hardwater Effect for the Northeastern Coastal Waters of Argentina
Radiocarbon Reservoir Ages and Hardwater Effect for the Northeastern Coastal Waters of Argentina
复制标题
阿根廷东北部沿海水域的放射性碳储层年龄和硬水效应
DOI：
10.1017/s003382220004340x
复制
发表时间：
2008
期刊：
影响因子：
8.3
通讯作者：
D. Martinez
中科院分区：
文献类型：
--
作者：
E. Gómez;C. Borel;M. Aguirre;D. Martinez
加速器质谱（AMS）的放射性碳年代测定获得了18个软体动物壳收集活沿着布宜诺斯艾利斯省海岸，阿根廷，在公元1914年至1935年期间。根据南半球的树轮校准曲线（SHCal04，McCormac等人，2004年）和海洋δR值（根据常规14 C年龄与海洋混合层模型计算得出的年龄之差计算得出），对所有样本的储层年龄进行了估算（Marine04，Hughen等人，2004年）。对于大多数沿海地区，观察到一个很大的δR分散，从191年到2482年，这是由河流和地下水的溶解碳酸盐含量的变化（“硬水效应”）的输入解释，并表明基于壳的14C年表的严重限制。在布兰卡湾河口内部，δR值介于−40至50 ± 46之间，这是当地地质环境特殊性的结果。这表明，在某些限制条件下，可以在该位置使用具有标准参数（δR = 0）的海洋校准曲线。
Accelerator mass spectrometry (AMS) radiocarbon dates were obtained for 18 mollusk shells collected alive along the Buenos Aires province coast, Argentina, over the period AD 1914–1935. Reservoir ages were estimated for all samples on the basis of the tree-ring calibration curve for the Southern Hemisphere (SHCal04, McCormac et al. 2004) and the marine δR values calculated as the difference between the conventional 14C age and the age deduced from the marine, mixed-layer model calculation (Marine04, Hughen et al. 2004). For most coastal locations, a great δR scatter was observed, ranging from 191 to 2482 yr, which is explained by the input of varying content of dissolved carbonate by rivers and groundwater (“hardwater effect”) and indicates a serious limitation for shell-based 14C chronologies. Within the interior of Bahía Blanca estuary, δR values ranged from −40 to 50 ± 46 as a consequence of the local geological particularities of the environment. This suggests that, with some restrictions, the marine calibration curve with standard parameters (δR = 0) could be used at this location.
影响因子：
8.3
作者：
STUIVER, M;POLACH, HA
通讯作者：
POLACH, HA
影响因子：
8.3
作者：
Hughen, KA;Baillie, MGL;Weyhenmeyer, CE
通讯作者：
Weyhenmeyer, CE