Data

The percentage of calcium carbonate in samples taken from various depths in core GC11, located in the Capricorn Channel

Australian Ocean Data Network
Bostock, Helen ; Opdyke, Bradley, Dr
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/6b9effd0-2478-11dc-95fb-00188b4c0af8&rft.title=The percentage of calcium carbonate in samples taken from various depths in core GC11, located in the Capricorn Channel&rft.identifier=https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/6b9effd0-2478-11dc-95fb-00188b4c0af8&rft.description=A gravity core (GC11) was collected from a depth of 502 mbsl within the Capricorn Channel, southern Great Barrier Reef (GBR). The percentage of calcium carbonate in samples collected from different depths were analysed, along with other parameters, to determine changes in carbonate mineralogy and terrestrial influx. The results indicate that CaCO3% increases rapidly at the terminations, with highs during the interglacials and as low as 50% during some of the glacials. The CaCO3% highs of around 85% coincide with very low sedimentation rates of Maintenance and Update Frequency: notPlannedStatement: A sample from each depth was dried in the oven and ground up into a fine powder (~100mm) using a mortar and pestle. Approximately 1g of each sample was weighed accurately. 20ml of ~1mol/l HCl was added to the sample, and then heated and stirred until all the carbonate had reacted. Resulting solution was titrated with 0.5mol/l NaOH using the Metrohm Ion analysis 716 DMS Titrino series 6.0 to determine the calcium carbonate %. Error range of 2%Statement: Values for CaCO3 % are recorded at 10cm, 15cm, 20cm and then for every 10cm down the core until reaching a depth of 560cm. Percentage values for CaCO3 have an error range of ± 2%. Parameters: Depth through core (cm), percentage of calcium carbonate (%).&rft.creator=Bostock, Helen &rft.creator=Opdyke, Bradley, Dr &rft.date=2007&rft.coverage=153.36627,-23.38420 153.36699,-23.38428 153.36696,-23.38481 153.36632,-23.38482 153.36627,-23.38420&rft.coverage=westlimit=151.5; southlimit=-24.5; eastlimit=153; northlimit=-23&rft.coverage=westlimit=151.5; southlimit=-24.5; eastlimit=153; northlimit=-23&rft.coverage=uplimit=502; downlimit=502&rft.coverage=uplimit=502; downlimit=502&rft_rights=Creative Commons Attribution 2.5 Australia License http://creativecommons.org/licenses/by/2.5/au/&rft_rights=The citation in a list of references is: citation author name/s (year metadata published), metadata title. Citation author organisation/s. File identifier and Data accessed at (add http link).&rft_subject=environment&rft_subject=CARBONATE&rft_subject=EARTH SCIENCE&rft_subject=OCEANS&rft_subject=OCEAN CHEMISTRY&rft_subject=Oceans | Marine Sediments | Carbonate Sediments&rft_subject=core_depth&rft_subject=Amount_of_calcium_carbonate&rft.type=dataset&rft.language=English Access the data
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The citation in a list of references is: citation author name/s (year metadata published), metadata title. Citation author organisation/s. File identifier and Data accessed at (add http link).

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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 percentage of calcium carbonate in samples collected from different depths were analysed, along with other parameters, to determine changes in carbonate mineralogy and terrestrial influx. The results indicate that CaCO3% increases rapidly at the terminations, with highs during the interglacials and as low as 50% during some of the glacials. The CaCO3% highs of around 85% coincide with very low sedimentation rates of <1 cm/kyr and are probably dominated by pelagic productivity.

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Maintenance and Update Frequency: notPlanned
Statement: A sample from each depth was dried in the oven and ground up into a fine powder (~100mm) using a mortar and pestle. Approximately 1g of each sample was weighed accurately. 20ml of ~1mol/l HCl was added to the sample, and then heated and stirred until all the carbonate had reacted. Resulting solution was titrated with 0.5mol/l NaOH using the Metrohm Ion analysis 716 DMS Titrino series 6.0 to determine the calcium carbonate %. Error range of 2%
Statement: Values for CaCO3 % are recorded at 10cm, 15cm, 20cm and then for every 10cm down the core until reaching a depth of 560cm. Percentage values for CaCO3 have an error range of ± 2%. Parameters: Depth through core (cm), percentage of calcium carbonate (%).

Notes

Credit
Funded by The Australian Research Council (ARC)
Credit
Funded by The Australian National University (ANU) Faculties Research Grant Scheme
Purpose
To help determine changes in the carbonate mineralogy and terrestrial influx, which may provide some useful palaeoclimate information. Very little previous work has been undertaken within this area.

Issued: 27 06 2007

Data time period: 1997 to 1997

This dataset is part of a larger collection

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153.36627,-23.3842 153.36699,-23.38428 153.36696,-23.38481 153.36632,-23.38482 153.36627,-23.3842

153.36663,-23.38451

153,-23 153,-24.5 151.5,-24.5 151.5,-23 153,-23

152.25,-23.75

text: westlimit=151.5; southlimit=-24.5; eastlimit=153; northlimit=-23

text: uplimit=502; downlimit=502

Subjects
Amount_of_calcium_carbonate | Carbonate | EARTH SCIENCE | OCEAN CHEMISTRY | OCEANS | Oceans | Marine Sediments | Carbonate Sediments | core_depth | environment |

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Other Information
(ANU_Bostock_GC11_4_data.xls)

url : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/6b9effd0-2478-11dc-95fb-00188b4c0af8/attachments/ANU_Bostock_GC11_4_data.xls

Core data - Capricorn Channel (aodn: bluenet_datasets_capricorn_channel)

url : http://geoserver-123.aodn.org.au/geoserver/wms

global : 2b6c31c0-2465-11dc-95fb-00188b4c0af8

Identifiers
  • global : 6b9effd0-2478-11dc-95fb-00188b4c0af8