Data

Radiometrically determined 14C dates obtained for 4 sediment cores on Wistari Reef

Australian Ocean Data Network
Ryan, David ; Opdyke, Bradley
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/d2de24f0-0f01-11dc-b94f-00188b4c0af8&rft.title=Radiometrically determined 14C dates obtained for 4 sediment cores on Wistari Reef&rft.identifier=https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/d2de24f0-0f01-11dc-b94f-00188b4c0af8&rft.description=Wistari Reef is a lagoonal platform reef, situated on the Tropic of Capricorn, within the Capricorn and Bunker region of the southern Great Barrier Reef. In this dataset seven radiometrically determined 14C dates were obtained for 4 sediment cores on the reef. The effects of bioturbation within the cores was pronounced, and as such ages are likely to be undersestimated for deeper samples, and overestimated for shallower samples. From the results, the oldest age estimate obtained was from the base of core VC-01 and was aged at 2150±70 yr BP. All core tops were estimated to be ~1100±70 yr BP.Statement: Core IC-02 was collected using an impact core, while cores VC-01, VC-02 and VC-03 were collected using a vibrocore. Core samples were sealed in plastic (impact cores) and aluminium (vibracores) for transport, and stored in a constant temperature cool room until analysis. Impact core was split using a small vibrating saw, and cut lengthways where possible. Vibracores opened using a small angle grinder, and split in a similar manner. Cores logged and samples collected from top and base. Samples were collected from the centre of each split core, in order to avoid contamination. Approximately 30g of sediment was taken for each sample, and each was spread onto plastic dish and air dried for 24 hrs.Statement: Core VC-01 was radiometrically dated only at the core base. The three other cores (IC-02, VC-02 and VC-03) were age determined both at the core top, and at the core base. The effects of bioturbation within the cores was pronounced, and as such ages are likely to be undersestimated for deeper samples, and overestimated for shallower samples. Parameters: Core, latitude (decimal degrees), longitude (decimal degrees), core length (cm), core top (cm), age (yBP), core base (cm), age (yBP).&rft.creator=Ryan, David &rft.creator=Opdyke, Bradley &rft.date=2007&rft.coverage=151.83658,-23.48230 151.85986,-23.49551 151.89561,-23.48884 151.92237,-23.48260 151.92202,-23.46441 151.89503,-23.43829 151.83000,-23.45404 151.83658,-23.48230&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=137.5; downlimit=0&rft.coverage=uplimit=137.5; downlimit=0&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=geoscientificInformation&rft_subject=CORAL REEFS&rft_subject=EARTH SCIENCE&rft_subject=OCEANS&rft_subject=COASTAL PROCESSES&rft_subject=RADIOCARBON&rft_subject=PALEOCLIMATE&rft_subject=OCEAN/LAKE RECORDS&rft_subject=latitude&rft_subject=longitude&rft_subject=core_length&rft_subject=age&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

Wistari Reef is a lagoonal platform reef, situated on the Tropic of Capricorn, within the Capricorn and Bunker region of the southern Great Barrier Reef. In this dataset seven radiometrically determined 14C dates were obtained for 4 sediment cores on the reef. The effects of bioturbation within the cores was pronounced, and as such ages are likely to be undersestimated for deeper samples, and overestimated for shallower samples. From the results, the oldest age estimate obtained was from the base of core VC-01 and was aged at 2150±70 yr BP. All core tops were estimated to be ~1100±70 yr BP.

Lineage

Statement: Core IC-02 was collected using an impact core, while cores VC-01, VC-02 and VC-03 were collected using a vibrocore. Core samples were sealed in plastic (impact cores) and aluminium (vibracores) for transport, and stored in a constant temperature cool room until analysis. Impact core was split using a small vibrating saw, and cut lengthways where possible. Vibracores opened using a small angle grinder, and split in a similar manner. Cores logged and samples collected from top and base. Samples were collected from the centre of each split core, in order to avoid contamination. Approximately 30g of sediment was taken for each sample, and each was spread onto plastic dish and air dried for 24 hrs.
Statement: Core VC-01 was radiometrically dated only at the core base. The three other cores (IC-02, VC-02 and VC-03) were age determined both at the core top, and at the core base. The effects of bioturbation within the cores was pronounced, and as such ages are likely to be undersestimated for deeper samples, and overestimated for shallower samples. Parameters: Core, latitude (decimal degrees), longitude (decimal degrees), core length (cm), core top (cm), age (yBP), core base (cm), age (yBP).

Notes

Credit
Funded by The Australian Research Council (ARC)
Credit
The Australian National University (ANU)
Purpose
Radiometrically dated core samples allow the sedimentation rates for the Holocene sediments of Wistari Reef to be calculated.

Issued: 31 05 2007

Data time period: 1998 to 1998

This dataset is part of a larger collection

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151.83658,-23.4823 151.85986,-23.49551 151.89561,-23.48884 151.92237,-23.4826 151.92202,-23.46441 151.89503,-23.43829 151.83,-23.45404 151.83658,-23.4823

151.876185,-23.4669

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=137.5; downlimit=0

Subjects
COASTAL PROCESSES | Coral Reefs | EARTH SCIENCE | OCEAN/LAKE RECORDS | OCEANS | PALEOCLIMATE | Radiocarbon | age | core_length | geoscientificInformation | latitude | longitude |

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Other Information
(ANU_Ryan_Cores_1_data.xls)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/d2de24f0-0f01-11dc-b94f-00188b4c0af8/attachments/ANU_Ryan_Cores_1_data.xls

global : c30fa590-0e74-11dc-8c12-00188b4c0af8

Identifiers
  • global : d2de24f0-0f01-11dc-b94f-00188b4c0af8