Age vs Depth profile of core GC10, collected from the Capricorn Channel off the Eastern Australian Coast

A gravity core (GC10) was collected from a depth of 335 mbsl within the Capricorn Channel, southern Great Barrier Reef (GBR). Isotopic values for 18O and 13C were obtained from Gs. ruber and correlated with the SPECMAP age-model. Radiocarbon dating of G. sacculifer was also undertaken at three sample depths, and then corrected and correlated with the curve. This yielded an age vs. depth profile from which it was possible to determine approximate sedimentation rates. The results place the Last Glacial Maximum (LGM) date at 130cm and highlights a peak in sedimentation rate during the penultimate glacial / interglacial transition. Down the core the sedimentation rates vary considerably from a high of 12 cm/kyr down to科研团队从大堡礁（Great Barrier Reef，GBR）南部摩羯水道（Capricorn Channel）的335 mbsl（即海平面下米数）处采集了一根重力岩心GC10。研究人员从Gs. ruber中获取了氧18（¹⁸O）与碳13（¹³C）的同位素数值，并将其与SPECMAP年龄模型进行关联。此外，还针对三个样品深度的G. sacculifer开展了放射性碳定年，将测定结果校正后与对应曲线进行匹配。由此得到了年龄-深度剖面，据此可推算出近似的沉积速率。研究结果显示，末次冰盛期（Last Glacial Maximum，LGM）的赋存深度为130厘米，并揭示出倒数第二次冰期/间冰期转换阶段存在沉积速率峰值。该岩心的沉积速率存在显著波动，最高可达12 cm/kyr，最低值则