Marine reservoir age is an important component for correction in radiocarbon (14C) dating of marine and coastal samples. 14C concentration in pre-bomb marine samples of known age are used to derive marine reservoir age of a region. Annually banded coral from Landfall island in the northern Andaman has been analyzed for its 14C concentration during the pre-bomb period 1948–1951. 14C age and reservoir effect (∆R) are reported for these pre-bomb coral samples from the northern Andaman region. The mean 14C age of 331 ± 61 yr BP was obtained for the period 1948–1951 with an average reservoir age correction of –138 ± 61 yr. This reservoir age correction is lowest reported from the northern Indian Ocean. ∆R value of the northern Andaman and the Bay of Bengal appears lower than that of southern Andaman. The ∆R values obtained using mollusk shells and coral from the Andaman region shows large variability. The lower reservoir age correction for the Landfall Island situated in the northern part of the Andaman archipelago, could result due to freshwater flux and reduced upwelling in the region.

中文翻译：

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安达曼盆地海洋水库年龄修正

海洋储层年龄是放射性碳校正的重要组成部分（14C) 海洋和沿海样品的年代测定。14已知年龄的炸弹前海洋样本中的 C 浓度用于推导一个地区的海洋储层年龄。来自安达曼北部 Landfall 岛的年度带状珊瑚已被分析为141948-1951 年爆炸前时期的 C 浓度。14报告了来自安达曼北部地区的这些炸弹前珊瑚样本的 C 年龄和水库效应 (ΔR)。均值14在 1948-1951 年期间获得了 331 ± 61 年 BP 的 C 年龄，平均储层年龄修正为 –138 ± 61 年。这种储层年龄修正是印度洋北部报告的最低值。安达曼北部和孟加拉湾的 ΔR 值似乎低于安达曼南部。使用安达曼地区的软体动物贝壳和珊瑚获得的 ΔR 值显示出很大的可变性。位于安达曼群岛北部的 Landfall 岛的较低水库年龄修正可能是由于该地区淡水通量和上升流减少所致。