[Parameters: Topic='SOLID EARTH', Term='TECTONICS', Variable_Level_1='LITHOSPHERIC PLATE MOTION']
Nature and Evolution of the Upper Mantle beneath Heard IslandEntry ID: ASAC_1243
Abstract: 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)
Data Set Citation
Dataset Originator/Creator: O'Reilly, S.
Dataset Title: Nature and Evolution of the Upper Mantle beneath Heard Island
Dataset Series Name: CAASM Metadata
Dataset Release Date: 2002-11-15
Dataset Publisher: Australian Antarctic Data Centre
Dataset DOI: doi:10.4225/15/554ACADFE35E6Online Resource: https://data.aad.gov.au/aadc/metadata/metadata_redirect.cfm?md=/AMD...
Start Date: 2000-10-22Stop Date: 2000-11-29
ISO Topic Category
Access Constraints These data are publicly available at the provided URL.
Use Constraints This data set conforms to the PICCCBY Attribution License
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.
Data Set Progress
Distribution Media: HTTP
Distribution Size: 2 kb
Distribution Format: .csv
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Phone: +61 2 9850 8953
Fax: +61 2 9850 6904
Email: soreilly at laurel.ocs.mq.edu.au
Macquarie University GEMOC-School of Earth and Planet
City: North Ryde
Province or State: NSW
Postal Code: 2109
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2000-08-11
Last DIF Revision Date: 2016-01-27