Geology of the Larsemann Hills 2004
The Larsemann Hills region is dominated by two major lithological associations, a Palaeoproterozoic felsic/mafic orthogneiss complex (Søstrene Orthogneiss) which occurs as basement to a sequence of pelitic, psammitic and felsic paragneiss (supergroup = Brattstrand Paragneiss) and felsic intrusives....
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Online Access: | https://researchdata.edu.au/geology-larsemann-hills-2004/1434810 http://data.gov.au/dataset/1f1551b9-6fc9-43b5-951a-6b378e31f2ad |
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ftands:oai:ands.org.au::1434810 2023-09-05T13:12:58+02:00 Geology of the Larsemann Hills 2004 Australian Antarctic Division (isOwnedBy) Spatial: 75.95,-69.48 76.55,-69.48 76.55,-69.33 75.95,-69.33 75.95,-69.48 https://researchdata.edu.au/geology-larsemann-hills-2004/1434810 http://data.gov.au/dataset/1f1551b9-6fc9-43b5-951a-6b378e31f2ad unknown data.gov.au https://researchdata.edu.au/geology-larsemann-hills-2004/1434810 http://data.gov.au/dataset/1f1551b9-6fc9-43b5-951a-6b378e31f2ad aad-lars-geology-2004 Australian Antarctic Division AERIAL PHOTOGRAPHS AMD AMD-AU CEOS CONTINENT - ANTARCTICA - Larsemann Hills EARTH SCIENCE - SOLID EARTH - GEOMORPHIC LANDFORMS-PROCESSES - TECTONIC LANDFORMS EARTH SCIENCE - SOLID EARTH - ROCKS-MINERALS-CRYSTALS EARTH SCIENCE - SOLID EARTH - ROCKS-MINERALS-CRYSTALS - METAMORPHIC ROCKS GEOGRAPHIC REGION - POLAR GIS Geology Larsemann Hills Map dataset ftands 2023-08-14T22:32:41Z The Larsemann Hills region is dominated by two major lithological associations, a Palaeoproterozoic felsic/mafic orthogneiss complex (Søstrene Orthogneiss) which occurs as basement to a sequence of pelitic, psammitic and felsic paragneiss (supergroup = Brattstrand Paragneiss) and felsic intrusives. The depositional age of the Brattstrand Paragneiss sequences are controversial but isotopic data suggest derivation from the basement Søstrene Orthogneiss. Current geochronology indicates that the region experienced medium to low pressure granulite-facies metamorphism during the Early Palaeozoic (~500 Ma). Although the paragneiss sequences record no evidence of earlier metamorphism, relicts of a previous metamorphic event at ~1000 Ma are preserved in the Søstrene Orthogneiss. Within the Larsemann Hills region, the Early Palaeozoic event is characterised by peak metamorphism of ~7 kbar at ~800-850 degrees C, with the post-peak evolution characterised by decompression, with some cooling, to 4 kbars at 750 degrees C, then to 2-3 kbar at 600-650 degrees C during final stages of orogenesis, with exhumation largely driven by crustal extension. Tectonic models generally argue for a continental-continental collisional scenario, with thermal input derived from a thinned mantle lithosphere.\r\n\r\nSee the document available for download at the URL given below for further information. Point of truth URL of this metadata record - Point of truth URL of this metadata record Download point for the data - shapefiles - Download point for the data - shapefiles Download point for the data - map produced from the data - Download point for the data - map produced from the data Public information for ASAC project 2350 - Public information for ASAC project 2350 Citation reference for this metadata record and dataset - Citation reference for this metadata record and dataset Dataset Antarc* Antarctica Research Data Australia (Australian National Data Service - ANDS) Larsemann Hills ENVELOPE(76.217,76.217,-69.400,-69.400) Søstrene ENVELOPE(75.503,75.503,-69.588,-69.588) |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
AERIAL PHOTOGRAPHS AMD AMD-AU CEOS CONTINENT - ANTARCTICA - Larsemann Hills EARTH SCIENCE - SOLID EARTH - GEOMORPHIC LANDFORMS-PROCESSES - TECTONIC LANDFORMS EARTH SCIENCE - SOLID EARTH - ROCKS-MINERALS-CRYSTALS EARTH SCIENCE - SOLID EARTH - ROCKS-MINERALS-CRYSTALS - METAMORPHIC ROCKS GEOGRAPHIC REGION - POLAR GIS Geology Larsemann Hills Map |
spellingShingle |
AERIAL PHOTOGRAPHS AMD AMD-AU CEOS CONTINENT - ANTARCTICA - Larsemann Hills EARTH SCIENCE - SOLID EARTH - GEOMORPHIC LANDFORMS-PROCESSES - TECTONIC LANDFORMS EARTH SCIENCE - SOLID EARTH - ROCKS-MINERALS-CRYSTALS EARTH SCIENCE - SOLID EARTH - ROCKS-MINERALS-CRYSTALS - METAMORPHIC ROCKS GEOGRAPHIC REGION - POLAR GIS Geology Larsemann Hills Map Geology of the Larsemann Hills 2004 |
topic_facet |
AERIAL PHOTOGRAPHS AMD AMD-AU CEOS CONTINENT - ANTARCTICA - Larsemann Hills EARTH SCIENCE - SOLID EARTH - GEOMORPHIC LANDFORMS-PROCESSES - TECTONIC LANDFORMS EARTH SCIENCE - SOLID EARTH - ROCKS-MINERALS-CRYSTALS EARTH SCIENCE - SOLID EARTH - ROCKS-MINERALS-CRYSTALS - METAMORPHIC ROCKS GEOGRAPHIC REGION - POLAR GIS Geology Larsemann Hills Map |
description |
The Larsemann Hills region is dominated by two major lithological associations, a Palaeoproterozoic felsic/mafic orthogneiss complex (Søstrene Orthogneiss) which occurs as basement to a sequence of pelitic, psammitic and felsic paragneiss (supergroup = Brattstrand Paragneiss) and felsic intrusives. The depositional age of the Brattstrand Paragneiss sequences are controversial but isotopic data suggest derivation from the basement Søstrene Orthogneiss. Current geochronology indicates that the region experienced medium to low pressure granulite-facies metamorphism during the Early Palaeozoic (~500 Ma). Although the paragneiss sequences record no evidence of earlier metamorphism, relicts of a previous metamorphic event at ~1000 Ma are preserved in the Søstrene Orthogneiss. Within the Larsemann Hills region, the Early Palaeozoic event is characterised by peak metamorphism of ~7 kbar at ~800-850 degrees C, with the post-peak evolution characterised by decompression, with some cooling, to 4 kbars at 750 degrees C, then to 2-3 kbar at 600-650 degrees C during final stages of orogenesis, with exhumation largely driven by crustal extension. Tectonic models generally argue for a continental-continental collisional scenario, with thermal input derived from a thinned mantle lithosphere.\r\n\r\nSee the document available for download at the URL given below for further information. Point of truth URL of this metadata record - Point of truth URL of this metadata record Download point for the data - shapefiles - Download point for the data - shapefiles Download point for the data - map produced from the data - Download point for the data - map produced from the data Public information for ASAC project 2350 - Public information for ASAC project 2350 Citation reference for this metadata record and dataset - Citation reference for this metadata record and dataset |
author2 |
Australian Antarctic Division (isOwnedBy) |
format |
Dataset |
title |
Geology of the Larsemann Hills 2004 |
title_short |
Geology of the Larsemann Hills 2004 |
title_full |
Geology of the Larsemann Hills 2004 |
title_fullStr |
Geology of the Larsemann Hills 2004 |
title_full_unstemmed |
Geology of the Larsemann Hills 2004 |
title_sort |
geology of the larsemann hills 2004 |
publisher |
data.gov.au |
url |
https://researchdata.edu.au/geology-larsemann-hills-2004/1434810 http://data.gov.au/dataset/1f1551b9-6fc9-43b5-951a-6b378e31f2ad |
op_coverage |
Spatial: 75.95,-69.48 76.55,-69.48 76.55,-69.33 75.95,-69.33 75.95,-69.48 |
long_lat |
ENVELOPE(76.217,76.217,-69.400,-69.400) ENVELOPE(75.503,75.503,-69.588,-69.588) |
geographic |
Larsemann Hills Søstrene |
geographic_facet |
Larsemann Hills Søstrene |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Australian Antarctic Division |
op_relation |
https://researchdata.edu.au/geology-larsemann-hills-2004/1434810 http://data.gov.au/dataset/1f1551b9-6fc9-43b5-951a-6b378e31f2ad aad-lars-geology-2004 |
_version_ |
1776202555438661632 |