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Determining main carbonate mineralogy, and the primary components of the non carbonate fraction, at four depths in core GC12, collected from the Capricorn Channel.

Created 13/03/2025

Updated 13/03/2025

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A gravity core (GC12) was collected from a depth of 990.5 mbsl within the Capricorn Channel, southern Great Barrier Reef (GBR). Analysis of other parameters revealed the Last Glacial Maximum (LGM) sitting at a depth of ~175cm into the core. Four samples were collected for X-ray Diffraction (XRD) analysis; the top two, at the sediment surface (GC12-0) and at 30cm (GC12-30) represent interglacial sediment, while the lower two, at 210cm (GC12-210) and 330cm (GC12-330) represent glacial sediment. XRD analysis suggests that the majority of the carbonate is calcite during the interglacials, primarily from pelagic carbonate production. During the glacials and transitions more quartz, feldspar, aragonite and Mg calcite are present. This suggests that there is a changing dominance of pelagic, terrigenous and reef platform material within the core related to sea-level variations.

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Title Determining main carbonate mineralogy, and the primary components of the non carbonate fraction, at four depths in core GC12, collected from the Capricorn Channel.
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/1ab0715a-f7e5-406f-b5db-0f91d810b042
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 "Determining main carbonate mineralogy, and the primary components of the non carbonate fraction, at four depths in core GC12, collected from the Capricorn Channel.". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/determining-main-carbonate-mineralogy-and-the-primary-components-of-the-non-carbonate-fraction-7

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