Data

Macquarie Island: A window into the oceanic crust and upper mantle

Australian Antarctic Division
Cawood, P. ; CAWOOD, PETER
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=http://data.aad.gov.au/metadata/ASAC_1208&rft.title=Macquarie Island: A window into the oceanic crust and upper mantle&rft.identifier=http://data.aad.gov.au/metadata/ASAC_1208&rft.publisher=Australian Antarctic Data Centre&rft.description=Because of the inaccessibility of the deep-ocean floor, our knowledge about the composition and structure of the oceanic crust is very limited. Macquarie Island is the only fragment of ocean crust exposed above sea-level in the world, providing a unique opportunity to study the ocean crust directly in unprecedented detail.From the abstract of the referenced paper:Macquarie Island preserves largely in-situ Miocene oceanic crust and mantle formed at a slow-spreading ridge. The crustal section on the island does not conform to a simple 'layer cake pseudo-stratigraphy', but is the result of multiple magmatic episodes. Macquarie Island crust did not grow by top-down cooling, but rather from the base up. Peridotites cooled first and formed the basement into which gabbro plutons were intruded. This was followed by cooling and deformation, and by intrusion of dykes that fed a sheeted dyke-basalt complex. Finally, lava filled grabens were formed. These relative age relations rule out simple co-genetic relations between rock units.Progress Code: completedStatement: Dates provided in temporal coverage are approximate only, and represent the beginning and end date of the Macquarie Island season in 2002/2003. &rft.creator=Cawood, P. &rft.creator=CAWOOD, PETER &rft.date=2004&rft.coverage=westlimit=158.0; southlimit=-54.0; eastlimit=159.0; northlimit=-54.0&rft.coverage=westlimit=158.0; southlimit=-54.0; eastlimit=159.0; northlimit=-54.0&rft_rights=A pdf copy of the referenced paper is available for download from the provided URL to AAD staff only.&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_1208 when using these data.&rft_rights=This metadata record is publicly available.&rft_subject=geoscientificInformation&rft_subject=oceans&rft_subject=EARTH SCIENCE > SOLID EARTH > GRAVITY/GRAVITATIONAL FIELD > CRUSTAL MOTION > OCEAN CRUST DEFORMATION&rft_subject=MACQUARIE ISLAND&rft_subject=MID-OCEAN RIDGES&rft_subject=OCEANIC LITHOSPHERE&rft_subject=OPHIOLITES&rft_subject=SHEETED DYKES&rft_subject=AMD/AU&rft_subject=CEOS&rft_subject=AMD&rft_subject=OCEAN > SOUTHERN OCEAN&rft_subject=OCEAN > SOUTHERN OCEAN > MACQUARIE ISLAND&rft_subject=GEOGRAPHIC REGION > POLAR&rft.type=dataset&rft.language=English Access the data
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CC-BY

Attribution 4.0 International (CC BY 4.0)
https://creativecommons.org/licenses/by/4.0/legalcode

A pdf copy of the referenced paper is available for download from the provided URL to AAD staff only.

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_1208 when using these data.

This metadata record is publicly available.

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Because of the inaccessibility of the deep-ocean floor, our knowledge about the composition and structure of the oceanic crust is very limited. Macquarie Island is the only fragment of ocean crust exposed above sea-level in the world, providing a unique opportunity to study the ocean crust directly in unprecedented detail.

From the abstract of the referenced paper:

Macquarie Island preserves largely in-situ Miocene oceanic crust and mantle formed at a slow-spreading ridge. The crustal section on the island does not conform to a simple 'layer cake pseudo-stratigraphy', but is the result of multiple magmatic episodes. Macquarie Island crust did not grow by top-down cooling, but rather from the base up. Peridotites cooled first and formed the basement into which gabbro plutons were intruded. This was followed by cooling and deformation, and by intrusion of dykes that fed a sheeted dyke-basalt complex. Finally, lava filled grabens were formed. These relative age relations rule out simple co-genetic relations between rock units.

Lineage

Progress Code: completed
Statement: Dates provided in temporal coverage are approximate only, and represent the beginning and end date of the Macquarie Island season in 2002/2003.

Data time period: 2002-10-21 to 2003-03-28

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158,-54 159,-54

158.5,-54

text: westlimit=158.0; southlimit=-54.0; eastlimit=159.0; northlimit=-54.0

Subjects
AMD | AMD/AU | CEOS | EARTH SCIENCE > SOLID EARTH > GRAVITY/GRAVITATIONAL FIELD > CRUSTAL MOTION > OCEAN CRUST DEFORMATION | GEOGRAPHIC REGION > POLAR | MACQUARIE ISLAND | MID-OCEAN RIDGES | OCEAN > SOUTHERN OCEAN | OCEAN > SOUTHERN OCEAN > MACQUARIE ISLAND | OCEANIC LITHOSPHERE | OPHIOLITES | SHEETED DYKES | geoscientificInformation | oceans |

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Other Information
Public information for ASAC project 1208 (PROJECT HOME PAGE)

url : https://projects.aad.gov.au/search_projects_results.cfm?project_no=1208

Download point for the paper - AAD staff only (VIEW RELATED INFORMATION > PUBLICATIONS)

url : http://data.aad.gov.au/aadc/portal/download_file.cfm?file_id=1861

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

url : http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_1208

Identifiers
  • global : ASAC_1208
ACN 633 798 857