Data

Quantifying the isotopic composition of oxygen and carbon through time in the core GC04, located off the coast of New Caledonia

Australian Ocean Data Network
Gretton, Elsie ; De Deckker, Patrick, Prof
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/bc267720-1e1b-11dc-badd-00188b4c0af8&rft.title=Quantifying the isotopic composition of oxygen and carbon through time in the core GC04, located off the coast of New Caledonia&rft.identifier=https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/bc267720-1e1b-11dc-badd-00188b4c0af8&rft.description=Core GC04 was collected from the southeastern side of the New Caledonian Basin. In relation to isotopic composition there appears to be a correlation between 13C and 18O measurements. The results also highlight a definite change in average 13C at isotopic stage 5e.Maintenance and Update Frequency: notPlannedStatement: 3g of the sediment from each sample depth was placed into a clean glass jar and oven dried for a minimum of 48hrs at 60oC. Samples then soaked in a mixture of distilled water and 3% hydrogen peroxide for a minimum of 48hrs, washed through 100µm sieves to separate the coarse fraction. They were then dried in the oven at 60oC. The addition of hydrogen peroxide has been found to have no effect on isotopic composition. ~20 white G. ruber (~300µm) were picked for analysis. Samples cleaned in alcohol and immersed in an ultrasonic bath for 15 seconds in order to dislodge the fine sediment fraction from G. ruber tests. Samples were washed a second time in alcohol and dried for analysis in the Thermal Ionisation Mass Spectrometer located at The Australian National University, Canberra. Samples were measured in relation to VPDB (Vienna PeeDee Belemnite). Analysis were performed every 2cm of the core to a depth of 140cm. The method of analysis gives a very low error margin. Parameters: Core depth (cm), time (kaBP), oxygen-18 isotope (parts per thousand), carbon-13 isotope (parts per thousand).Statement: Thermal Ionisation Mass Spectrometer located at The Australian National University, Canberra.&rft.creator=Gretton, Elsie &rft.creator=De Deckker, Patrick, Prof &rft.date=2007&rft.coverage=166.07795,-22.92046 166.22167,-22.92041 166.23380,-23.06557 166.07959,-23.05764 166.07795,-22.92046&rft.coverage=westlimit=142; southlimit=-30; eastlimit=170; northlimit=-7&rft.coverage=westlimit=142; southlimit=-30; eastlimit=170; northlimit=-7&rft.coverage=uplimit=2477; downlimit=2477&rft.coverage=uplimit=2477; downlimit=2477&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=ISOTOPES&rft_subject=EARTH SCIENCE&rft_subject=PALEOCLIMATE&rft_subject=OCEAN/LAKE RECORDS&rft_subject=core_depth&rft_subject=time&rft_subject=amount_of_oxygen-18_isotope&rft_subject=amount_of_carbon-13_isotope&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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Full description

Core GC04 was collected from the southeastern side of the New Caledonian Basin. In relation to isotopic composition there appears to be a correlation between 13C and 18O measurements. The results also highlight a definite change in average 13C at isotopic stage 5e.

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Maintenance and Update Frequency: notPlanned
Statement: 3g of the sediment from each sample depth was placed into a clean glass jar and oven dried for a minimum of 48hrs at 60oC. Samples then soaked in a mixture of distilled water and 3% hydrogen peroxide for a minimum of 48hrs, washed through 100µm sieves to separate the coarse fraction. They were then dried in the oven at 60oC. The addition of hydrogen peroxide has been found to have no effect on isotopic composition. ~20 white G. ruber (~300µm) were picked for analysis. Samples cleaned in alcohol and immersed in an ultrasonic bath for 15 seconds in order to dislodge the fine sediment fraction from G. ruber tests. Samples were washed a second time in alcohol and dried for analysis in the Thermal Ionisation Mass Spectrometer located at The Australian National University, Canberra. Samples were measured in relation to VPDB (Vienna PeeDee Belemnite). Analysis were performed every 2cm of the core to a depth of 140cm. The method of analysis gives a very low error margin. Parameters: Core depth (cm), time (kaBP), oxygen-18 isotope (parts per thousand), carbon-13 isotope (parts per thousand).
Statement: Thermal Ionisation Mass Spectrometer located at The Australian National University, Canberra.

Notes

Credit
Funded by The Australian Research Council (ARC)
Credit
The Australian National University (ANU)
Purpose
The chemical composition of calcareous shell holds clues to the chemical and physical state of the ambient seawater and is useful in reconstructing properties of ancient marine environments.

Issued: 19 06 2007

Data time period: 2001 to 2001

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166.07795,-22.92046 166.22167,-22.92041 166.2338,-23.06557 166.07959,-23.05764 166.07795,-22.92046

166.155875,-22.99299

170,-7 170,-30 142,-30 142,-7 170,-7

156,-18.5

text: westlimit=142; southlimit=-30; eastlimit=170; northlimit=-7

text: uplimit=2477; downlimit=2477

Subjects
EARTH SCIENCE | Isotopes | OCEAN/LAKE RECORDS | PALEOCLIMATE | amount_of_carbon-13_isotope | amount_of_oxygen-18_isotope | core_depth | environment | time |

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Other Information
(ANU_Gretton_GC04_2_data.xls)

url : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/bc267720-1e1b-11dc-badd-00188b4c0af8/attachments/ANU_Gretton_GC04_2_data.xls

Core data - New Caledonian Basin (aodn:bluenet_datasets_new_caledonian_basin)

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

Identifiers
  • global : bc267720-1e1b-11dc-badd-00188b4c0af8