Data

The percentage of calcium carbonate in samples taken from various depths in core GC09, 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/cafd0d90-22bc-11dc-8748-00188b4c0af8&rft.title=The percentage of calcium carbonate in samples taken from various depths in core GC09, located in the Capricorn Channel.&rft.identifier=https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/cafd0d90-22bc-11dc-8748-00188b4c0af8&rft.description=A gravity core (GC09) was collected from a depth of 166m within the Capricorn Channel, southern Great Barrier Reef (GBR). The percentage of calcium carbonate in samples collected from different depths was analysed, along with other parameters, to determine changes in carbonate mineralogy and terrestrial influx. The lowest percentage of calcium carbonate was recorded at ~60cm depth corresponding to the Last Glacial Maximum (LGM). The increase in the percentage of silt and mud during the LGM relates to a reduction in bioclastic carbonate production.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 calcium carbonate % are recorded at 5cm, 10cm, 15cm, 20cm and then for every 10cm down the core until reaching a depth of 120cm. 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=152.63469,-22.89476 152.63530,-22.89480 152.63528,-22.89526 152.63466,-22.89528 152.63469,-22.89476&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=166; downlimit=166&rft.coverage=uplimit=166; downlimit=166&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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Brief description

A gravity core (GC09) was collected from a depth of 166m within the Capricorn Channel, southern Great Barrier Reef (GBR). The percentage of calcium carbonate in samples collected from different depths was analysed, along with other parameters, to determine changes in carbonate mineralogy and terrestrial influx. The lowest percentage of calcium carbonate was recorded at ~60cm depth corresponding to the Last Glacial Maximum (LGM). The increase in the percentage of silt and mud during the LGM relates to a reduction in bioclastic carbonate production.

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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 calcium carbonate % are recorded at 5cm, 10cm, 15cm, 20cm and then for every 10cm down the core until reaching a depth of 120cm. 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: 25 06 2007

Data time period: 1997 to 1997

This dataset is part of a larger collection

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152.63469,-22.89476 152.6353,-22.8948 152.63528,-22.89526 152.63466,-22.89528 152.63469,-22.89476

152.63498,-22.89502

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=166; downlimit=166

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_GC09_4_data.xls)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/cafd0d90-22bc-11dc-8748-00188b4c0af8/attachments/ANU_Bostock_GC09_4_data.xls

global : abd6d050-22b1-11dc-8748-00188b4c0af8

Identifiers
  • global : cafd0d90-22bc-11dc-8748-00188b4c0af8
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