Data

Quantifying the isotopic composition of oxygen and carbon through time in the core MD032607, located off South Australia

Australian Ocean Data Network
Spooner, Michelle ; De Deckker, Patrick
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/33885270-07fb-11dc-92a7-00188b4c0af8&rft.title=Quantifying the isotopic composition of oxygen and carbon through time in the core MD032607, located off South Australia&rft.identifier=https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/33885270-07fb-11dc-92a7-00188b4c0af8&rft.description=The calcareous tests of Globigerina bulloides are analysed to quantify the isotopic composition of oxygen and carbon through time at core site MD032607 (137.4065 E, 36.9606 S).The lightest 18O value of 0.43ppt was recorded during the Holocene (20cm depth) while the heaviest 18O value of -2.71ppt was registered at the LGM (300cm depth). The 13C record ranges from a minimum at approximately 25cm (~2155yrs BP) of 0.00ppt, to a maximum value at 120cm (~10,330yrs BP) of 1.26ppt.Maintenance and Update Frequency: notPlannedStatement: Analytical errors are very small of ±0.08 18O per mil. and ±0.05 13C per mil. None of the results have been amended to account for the effect of ice volume on the foraminifera during the Last Glacial Maximum (LGM). Isotope records for both 18O and 13C are complete for all of the sampling depths. From the sediment surface down to 200cm, sampling was undertaken every 5cm. From this point, down to the end of the core at 3270cm, data is not recorded for regular intervals. Data is presented for every 30-120cm of the remaining core. Parameters: Core depth (cm), oxygen-18 Ga. bulloides (parts per thousand), carbon-13 Ga. bulloides (parts per thousand).Statement: Sample collected using a piston core. Each sample was wet sieved through 63µm mesh. ~15 Globigerina bulloides were then picked from the bulk sample, approx. 250µm in size before being cleaned. Calculations of 13C and 18O at various depths were made by the Finnigan MAT251 Mass Spectrometer at GEOMAR in Kiel, Germany.&rft.creator=Spooner, Michelle &rft.creator=De Deckker, Patrick &rft.date=2007&rft.coverage=137.41028,-36.96743 137.41148,-36.96742 137.41132,-36.96820 137.41030,-36.96820 137.41028,-36.96743&rft.coverage=westlimit=137; southlimit=-37; eastlimit=137.5; northlimit=-36.5&rft.coverage=westlimit=137; southlimit=-37; eastlimit=137.5; northlimit=-36.5&rft.coverage=uplimit=865; downlimit=865&rft.coverage=uplimit=865; downlimit=865&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=amount_of_oxygen-18_isotope_ga._bulloides&rft_subject=amount_of_carbon-13_isotope_ga._bulloides&rft.type=dataset&rft.language=English Access the data
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Creative Commons Attribution 2.5 Australia License
http://creativecommons.org/licenses/by/2.5/au/

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

The calcareous tests of Globigerina bulloides are analysed to quantify the isotopic composition of oxygen and carbon through time at core site MD032607 (137.4065 E, 36.9606 S).The lightest 18O value of 0.43ppt was recorded during the Holocene (20cm depth) while the heaviest 18O value of -2.71ppt was registered at the LGM (300cm depth). The 13C record ranges from a minimum at approximately 25cm (~2155yrs BP) of 0.00ppt, to a maximum value at 120cm (~10,330yrs BP) of 1.26ppt.

Lineage

Maintenance and Update Frequency: notPlanned
Statement: Analytical errors are very small of ±0.08 18O per mil. and ±0.05 13C per mil. None of the results have been amended to account for the effect of ice volume on the foraminifera during the Last Glacial Maximum (LGM). Isotope records for both 18O and 13C are complete for all of the sampling depths. From the sediment surface down to 200cm, sampling was undertaken every 5cm. From this point, down to the end of the core at 3270cm, data is not recorded for regular intervals. Data is presented for every 30-120cm of the remaining core. Parameters: Core depth (cm), oxygen-18 Ga. bulloides (parts per thousand), carbon-13 Ga. bulloides (parts per thousand).
Statement: Sample collected using a piston core. Each sample was wet sieved through 63µm mesh. ~15 Globigerina bulloides were then picked from the bulk sample, approx. 250µm in size before being cleaned. Calculations of 13C and 18O at various depths were made by the Finnigan MAT251 Mass Spectrometer at GEOMAR in Kiel, Germany.

Notes

Credit
The Australian National University (ANU)
Credit
Funded by The National Oceans Office (NOO)
Credit
Funded by The Australian Research Council (ARC)
Credit
Funded by The French Polar Institute
Credit
Funded by The Australian Institute of Nuclear Science Engineering (AINSE)
Credit
Funded by The Murray Darling Basin Commission
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: 21 03 2007

Data time period: 2003-01-01 to 2003-01-01

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137.41028,-36.96743 137.41148,-36.96742 137.41132,-36.9682 137.4103,-36.9682 137.41028,-36.96743

137.41088,-36.96781

137.5,-36.5 137.5,-37 137,-37 137,-36.5 137.5,-36.5

137.25,-36.75

text: westlimit=137; southlimit=-37; eastlimit=137.5; northlimit=-36.5

text: uplimit=865; downlimit=865

Subjects
EARTH SCIENCE | Isotopes | OCEAN/LAKE RECORDS | PALEOCLIMATE | amount_of_carbon-13_isotope_ga._bulloides | amount_of_oxygen-18_isotope_ga._bulloides | core_depth | environment |

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Other Information
(ANU_Spooner_MD032607_1_data.xls)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/33885270-07fb-11dc-92a7-00188b4c0af8/attachments/ANU_Spooner_MD032607_1_data.xls

global : 1bca5f00-07fd-11dc-92a7-00188b4c0af8

Identifiers
  • global : 33885270-07fb-11dc-92a7-00188b4c0af8