Macquarie Island: A window into the oceanic crust and upper mantle
Dates provided in temporal coverage are approximate only, and represent the beginning and end date of the Macquarie Island season in 2002/2003. Because of the inaccessibility of the deep-ocean floor, our knowledge about the composition and structure of the oceanic crust is very limited. Macquarie Is...
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Australian Ocean Data Network
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Online Access: | https://researchdata.ands.org.au/macquarie-island-window-upper-mantle/686210 https://data.aad.gov.au/metadata/records/ASAC_1208 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=1208 http://data.aad.gov.au/aadc/portal/download_file.cfm?file_id=1861 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_1208 |
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ftands:oai:ands.org.au::686210 2023-05-15T17:09:48+02:00 Macquarie Island: A window into the oceanic crust and upper mantle AADC (originator) AU/AADC > Australian Antarctic Data Centre, Australia (resourceProvider) Spatial: northlimit=-54.0; southlimit=-54.0; westlimit=158.0; eastLimit=159.0 Temporal: From 2002-10-21 to 2003-03-28 https://researchdata.ands.org.au/macquarie-island-window-upper-mantle/686210 https://data.aad.gov.au/metadata/records/ASAC_1208 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=1208 http://data.aad.gov.au/aadc/portal/download_file.cfm?file_id=1861 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_1208 unknown Australian Ocean Data Network https://researchdata.ands.org.au/macquarie-island-window-upper-mantle/686210 1aa43f20-4560-4f51-877c-69c65a7397ab https://data.aad.gov.au/metadata/records/ASAC_1208 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=1208 http://data.aad.gov.au/aadc/portal/download_file.cfm?file_id=1861 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_1208 https://data.aad.gov.au geoscientificInformation oceans OCEAN CRUST DEFORMATION EARTH SCIENCE SOLID EARTH GRAVITY/GRAVITATIONAL FIELD CRUSTAL MOTION MACQUARIE ISLAND MID-OCEAN RIDGES OCEANIC LITHOSPHERE OPHIOLITES SHEETED DYKES AMD/AU CEOS AMD OCEAN > SOUTHERN OCEAN SOUTHERN OCEAN > GEOGRAPHIC REGION > POLAR dataset ftands 2020-01-05T21:07:14Z Dates provided in temporal coverage are approximate only, and represent the beginning and end date of the Macquarie Island season in 2002/2003. 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. Dataset Macquarie Island Southern Ocean Research Data Australia (Australian National Data Service - ANDS) Southern Ocean ENVELOPE(158.0,159.0,-54.0,-54.0) |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
geoscientificInformation oceans OCEAN CRUST DEFORMATION EARTH SCIENCE SOLID EARTH GRAVITY/GRAVITATIONAL FIELD CRUSTAL MOTION MACQUARIE ISLAND MID-OCEAN RIDGES OCEANIC LITHOSPHERE OPHIOLITES SHEETED DYKES AMD/AU CEOS AMD OCEAN > SOUTHERN OCEAN SOUTHERN OCEAN > GEOGRAPHIC REGION > POLAR |
spellingShingle |
geoscientificInformation oceans OCEAN CRUST DEFORMATION EARTH SCIENCE SOLID EARTH GRAVITY/GRAVITATIONAL FIELD CRUSTAL MOTION MACQUARIE ISLAND MID-OCEAN RIDGES OCEANIC LITHOSPHERE OPHIOLITES SHEETED DYKES AMD/AU CEOS AMD OCEAN > SOUTHERN OCEAN SOUTHERN OCEAN > GEOGRAPHIC REGION > POLAR Macquarie Island: A window into the oceanic crust and upper mantle |
topic_facet |
geoscientificInformation oceans OCEAN CRUST DEFORMATION EARTH SCIENCE SOLID EARTH GRAVITY/GRAVITATIONAL FIELD CRUSTAL MOTION MACQUARIE ISLAND MID-OCEAN RIDGES OCEANIC LITHOSPHERE OPHIOLITES SHEETED DYKES AMD/AU CEOS AMD OCEAN > SOUTHERN OCEAN SOUTHERN OCEAN > GEOGRAPHIC REGION > POLAR |
description |
Dates provided in temporal coverage are approximate only, and represent the beginning and end date of the Macquarie Island season in 2002/2003. 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. |
author2 |
AADC (originator) AU/AADC > Australian Antarctic Data Centre, Australia (resourceProvider) |
format |
Dataset |
title |
Macquarie Island: A window into the oceanic crust and upper mantle |
title_short |
Macquarie Island: A window into the oceanic crust and upper mantle |
title_full |
Macquarie Island: A window into the oceanic crust and upper mantle |
title_fullStr |
Macquarie Island: A window into the oceanic crust and upper mantle |
title_full_unstemmed |
Macquarie Island: A window into the oceanic crust and upper mantle |
title_sort |
macquarie island: a window into the oceanic crust and upper mantle |
publisher |
Australian Ocean Data Network |
url |
https://researchdata.ands.org.au/macquarie-island-window-upper-mantle/686210 https://data.aad.gov.au/metadata/records/ASAC_1208 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=1208 http://data.aad.gov.au/aadc/portal/download_file.cfm?file_id=1861 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_1208 |
op_coverage |
Spatial: northlimit=-54.0; southlimit=-54.0; westlimit=158.0; eastLimit=159.0 Temporal: From 2002-10-21 to 2003-03-28 |
long_lat |
ENVELOPE(158.0,159.0,-54.0,-54.0) |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Macquarie Island Southern Ocean |
genre_facet |
Macquarie Island Southern Ocean |
op_source |
https://data.aad.gov.au |
op_relation |
https://researchdata.ands.org.au/macquarie-island-window-upper-mantle/686210 1aa43f20-4560-4f51-877c-69c65a7397ab https://data.aad.gov.au/metadata/records/ASAC_1208 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=1208 http://data.aad.gov.au/aadc/portal/download_file.cfm?file_id=1861 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_1208 |
_version_ |
1766066139953102848 |