Data

Sedimentation rates on Wistari Reef

Australian Ocean Data Network
Ryan, David ; 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/1f913530-0f07-11dc-b94f-00188b4c0af8&rft.title=Sedimentation rates on Wistari Reef&rft.identifier=https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/1f913530-0f07-11dc-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. Four core samples were collected from various locations on the reef and radiometerically dated. This allowed sedimentation rates for the Holocene sediments of Wistari Reef to be calculated. The maximum sedimentation rate represents the accumulation that has occurred between the core top date and the core base date; the minimum accretion rate takes only the basal core data into account, thus allowing for bioturbation of the sediments. The biggest maximum rate of accretion was seen at core IC-02, which exhibited an accretion rate of 4.79m/ka. The smallest minimum accretion rate was seen in VC-02 (on a sanded reef flat) with a accretion rate of 0.57m/ka.Statement: Core IC-02 was collected using an impact core, while cores VC-01, VC-02 and VC-03 were collected using a vibrocore. For radiocarbon dating, 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: The maximum sedimentation rate represents the accumulation that has occurred between the core top date and the core base date; the minimum accretion rate takes only the basal core data into account , thus allowing for bioturbation of the sediments. Maximum and minimum accretion rates are presented for two of the cores, IC-02 and VC-02. For core VC-01, the data only shows the maximum accretion rate, while for core VC-03 only the minimum accretion rate is calculated. Parameters: Core, latitude (decimal degrees), longitude (decimal degrees), zone, maximum accretion rate (m/ka), minimum accretion rate (m/ka).&rft.creator=Ryan, David &rft.creator=Opdyke, Bradley, Dr &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=environment&rft_subject=CORAL REEFS&rft_subject=EARTH SCIENCE&rft_subject=OCEANS&rft_subject=COASTAL PROCESSES&rft_subject=SEDIMENTATION&rft_subject=MARINE SEDIMENTS&rft_subject=latitude&rft_subject=longitude&rft_subject=accretion_rate&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. Four core samples were collected from various locations on the reef and radiometerically dated. This allowed sedimentation rates for the Holocene sediments of Wistari Reef to be calculated. The maximum sedimentation rate represents the accumulation that has occurred between the core top date and the core base date; the minimum accretion rate takes only the basal core data into account, thus allowing for bioturbation of the sediments. The biggest maximum rate of accretion was seen at core IC-02, which exhibited an accretion rate of 4.79m/ka. The smallest minimum accretion rate was seen in VC-02 (on a sanded reef flat) with a accretion rate of 0.57m/ka.

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. For radiocarbon dating, 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: The maximum sedimentation rate represents the accumulation that has occurred between the core top date and the core base date; the minimum accretion rate takes only the basal core data into account , thus allowing for bioturbation of the sediments. Maximum and minimum accretion rates are presented for two of the cores, IC-02 and VC-02. For core VC-01, the data only shows the maximum accretion rate, while for core VC-03 only the minimum accretion rate is calculated. Parameters: Core, latitude (decimal degrees), longitude (decimal degrees), zone, maximum accretion rate (m/ka), minimum accretion rate (m/ka).

Notes

Credit
Funded by The Australian Research Council (ARC)
Credit
The Australian National University (ANU)
Purpose
Through the analysis of sediment properties and sedimentation rates it is possible to investigate sediment production, transport and deposition processes

Modified: 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 | MARINE SEDIMENTS | OCEANS | Sedimentation | accretion_rate | environment | latitude | longitude |

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Other Information
(ANU_Ryan_Cores_2_data.xls)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/1f913530-0f07-11dc-b94f-00188b4c0af8/attachments/ANU_Ryan_Cores_2_data.xls

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

Identifiers
  • global : 1f913530-0f07-11dc-b94f-00188b4c0af8