Quantifying the isotopic composition of oxygen and carbon with increasing depth in core GC14, located in the Capricorn Channel

A gravity core (GC14) was collected from a depth of 2004 mbsl within the Capricorn Channel, southern Great Barrier Reef (GBR). The data from stable isotopes of Globigerinoides ruber were analysed to allow a preliminary understanding of the hemipelagic sedimentary environment over the last glacial / interglacial cycle. The results suggest that the core reaches the Last Glacial Maximum (LGM) at ~80cm depth corresponding to heavier 18-O values and other measured parameters.

研究人员于大堡礁（Great Barrier Reef, GBR）南部摩羯海峡内海平面以下2004米处采集了一根编号为GC14的重力岩心（gravity core）。通过分析红色拟抱球虫（Globigerinoides ruber）的稳定同位素数据，本研究初步厘清了末次冰期-间冰期旋回以来的半远洋沉积环境演化特征。结果表明，该岩心约80厘米深度处的沉积物对应氧-18（¹⁸O）偏高值及其他实测参数，对应末次盛冰期（Last Glacial Maximum, LGM）的沉积层位。