Data

Nature and Evolution of the Upper Mantle beneath Heard Island

Australian Antarctic Division
O'Reilly, S. ; O'REILLY, SUZANNE
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=info:doi10.4225/15/554ACADFE35E6&rft.title=Nature and Evolution of the Upper Mantle beneath Heard Island&rft.identifier=10.4225/15/554ACADFE35E6&rft.publisher=Australian Antarctic Data Centre&rft.description=This project is using ultramafic xenoliths - samples of the mantle beneath Heard Island to study the formation and evolution of the Kerguelen-Heard Plateau. Such plateaus are thought to represent an important stage in the formation of continents over the earths history. Additionally, new evidence suggests the Kerguelen Plateau may contain ancient continental fragments, which are possible remnants of Gondwana.Ultramafic xenoliths were collected from Heard Island during field season 2000 from 6 locations, 5 of which were previously unreported. Petrological and geochemical information is being used to characterise the mantle beneath Heard Island, and Re-Os isotopic dating is being used to constrain the formation age of the plateau. Initial results indicate the mantle beneath Heard Island is highly depleted in basaltic components. The presence of reaction textures containing small amounts of carbonate in some xenoliths is an indication of possible carbonatitic metasomatism, which has been observed for similar samples from Kerguelen.The fields in this dataset are:MU Number (Macquarie University Catalogue Number)Sample NumberLocationLatitudeLongitudeDescriptionProgress Code: completed&rft.creator=O'Reilly, S. &rft.creator=O'REILLY, SUZANNE &rft.date=2000&rft.coverage=westlimit=73.2979; southlimit=-53.1877; eastlimit=73.7221; northlimit=-52.9651&rft.coverage=westlimit=73.2979; southlimit=-53.1877; eastlimit=73.7221; northlimit=-52.9651&rft_rights=These data are publicly available at the provided URL.&rft_rights=Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/legalcode&rft_rights=This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_1243 when using these data.&rft_rights=This metadata record is publicly available.&rft_subject=geoscientificInformation&rft_subject=EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS > LITHOSPHERIC PLATE MOTION&rft_subject=DESCRIPTION&rft_subject=GEOLOGY&rft_subject=HEARD ISLAND&rft_subject=LATITUDE&rft_subject=LOCATION&rft_subject=LONGITUDE&rft_subject=MU NUMBER&rft_subject=SAMPLE NUMBER&rft_subject=FIELD SURVEYS&rft_subject=AMD/AU&rft_subject=CEOS&rft_subject=AMD&rft_subject=OCEAN > SOUTHERN OCEAN > Heard Island&rft_subject=CONTINENT > AUSTRALIA/NEW ZEALAND > AUSTRALIA > Heard Island&rft_subject=GEOGRAPHIC REGION > POLAR&rft_subject=OCEAN > SOUTHERN OCEAN > HEARD AND MCDONALD ISLANDS&rft.type=dataset&rft.language=English Access the data
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Attribution 4.0 International (CC BY 4.0)
https://creativecommons.org/licenses/by/4.0/legalcode

These data are publicly available at the provided URL.

This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_1243 when using these data.

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Full description

This project is using ultramafic xenoliths - samples of the mantle beneath Heard Island to study the formation and evolution of the Kerguelen-Heard Plateau. Such plateaus are thought to represent an important stage in the formation of continents over the earths history. Additionally, new evidence suggests the Kerguelen Plateau may contain ancient continental fragments, which are possible remnants of Gondwana.
Ultramafic xenoliths were collected from Heard Island during field season 2000 from 6 locations, 5 of which were previously unreported. Petrological and geochemical information is being used to characterise the mantle beneath Heard Island, and Re-Os isotopic dating is being used to constrain the formation age of the plateau. Initial results indicate the mantle beneath Heard Island is highly depleted in basaltic components. The presence of reaction textures containing small amounts of carbonate in some xenoliths is an indication of possible carbonatitic metasomatism, which has been observed for similar samples from Kerguelen.

The fields in this dataset are:
MU Number (Macquarie University Catalogue Number)
Sample Number
Location
Latitude
Longitude
Description

Lineage

Progress Code: completed

Data time period: 2000-10-22 to 2000-11-29

This dataset is part of a larger collection

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73.7221,-52.9651 73.7221,-53.1877 73.2979,-53.1877 73.2979,-52.9651 73.7221,-52.9651

73.51,-53.0764

text: westlimit=73.2979; southlimit=-53.1877; eastlimit=73.7221; northlimit=-52.9651

Subjects
AMD | AMD/AU | CEOS | CONTINENT > AUSTRALIA/NEW ZEALAND > AUSTRALIA > Heard Island | DESCRIPTION | EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS > LITHOSPHERIC PLATE MOTION | FIELD SURVEYS | GEOGRAPHIC REGION > POLAR | GEOLOGY | HEARD ISLAND | LATITUDE | LOCATION | LONGITUDE | MU NUMBER | OCEAN > SOUTHERN OCEAN > HEARD AND MCDONALD ISLANDS | OCEAN > SOUTHERN OCEAN > Heard Island | SAMPLE NUMBER | geoscientificInformation |

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Other Information
Download point for the data (GET DATA)

url : http://data.aad.gov.au/aadc/portal/download_file.cfm?file_id=1219

Public information for ASAC project 1243 (PROJECT HOME PAGE)

url : https://projects.aad.gov.au/search_projects_results.cfm?project_no=1243

Citation reference for this metadata record and dataset (VIEW RELATED INFORMATION)

url : http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_1243

Identifiers
ACN 633 798 857