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The percentage of CaCO3 in samples taken from various depths in core GC12, located in the Capricorn Channel

A gravity core (GC12) was collected from a depth of 990.5 mbsl within the Capricorn Channel, southern Great Barrier Reef (GBR). The percentage of CaCO3 in samples collected from different depths were analysed, along with other parameters, to determine changes in carbonate mineralogy and terrestrial influx. Levels of CaCO3% exhibit an higher percentage of >60% during the middle of Marine Isotope Stage (MIS) 3, levels similar to those seen in MIS 1. Throughout MIS 2 and during the glacial termination the CaCO3% remains relatively constant at ~60%. CaCO3 drops to 50% prior to a possible Antarctic cold reversal (between 14 ka BP and 12 ka BP) at 80cm in the core, before recovering to the 65-70% in the Holocene again.

Data and Resources

Additional Info

Field Value
Title The percentage of CaCO3 in samples taken from various depths in core GC12, located in the Capricorn Channel
Type Dataset
Language English
Licence Creative Commons Attribution 2.5 Australia
Data Status inactive
Update Frequency never
Landing Page https://data.gov.au/data/dataset/4f3e087a-bf42-4fad-839a-cbd11b7705fd
Date Published 2017-06-24
Date Updated 2023-08-11
Contact Point
National Institute of Water and Atmosphere (NIWA)
h.bostock@niwa.co.nz
Temporal Coverage 2017-06-24 16:25:53
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]]]}
Jurisdiction Commonwealth of Australia
Data Portal data.gov.au
Publisher/Agency National Institute of Water and Atmosphere (NIWA)