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Quantifying the isotopic composition of oxygen and carbon with increasing depth in core GC11, located in the Capricorn Channel

Created 13/03/2025

Updated 13/03/2025

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A gravity core (GC11) was collected from a depth of 502 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 ~30cm depth. From matching the 18O G. ruber curve with Martinson et al. (1987), 4 glacial cycles can be determined, incorporating Marine Isotope Stage (MIS) 1 through to MIS 11. Isotopically heavier 18O values at ~460cm, ~345cm, 150cm, and 30cm correspond respectively to MIS 10, MIS 8, MIS 6 and the LGM. The d13C shows a trough lagging behind the 18O high during the glacial, although there are considerable fluctuations between MIS 8 and 6.

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Title Quantifying the isotopic composition of oxygen and carbon with increasing depth in core GC11, located in the Capricorn Channel
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/312c1bca-7d49-4d69-ae3e-a64da40ab657
Contact Point
CSIRO Oceans & Atmosphere
h.bostock@niwa.co.nz
Reference Period 01/01/1997 - 01/01/1997
Geospatial Coverage {"type": "Polygon", "coordinates": [[[151.5, -24.5], [153.0, -24.5], [153.0, -23.0], [151.5, -23.0], [151.5, -24.5]]]}
Data Portal data.gov.au

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This dataset was originally found on data.gov.au "Quantifying the isotopic composition of oxygen and carbon with increasing depth in core GC11, located in the Capricorn Channel". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/quantifying-the-isotopic-composition-of-oxygen-and-carbon-with-increasing-depth-in-core-gc11-lo1

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