Wilkes Land Glacial History (WEGA)
Progress Code: completed Statement: Values provided in temporal coverage are approximate only. A collaborative Italian/Australian marine geoscience research voyage to the George Vth Land sector of the East Antarctic continental margin was carried out between 11th February and 20th March, 2000, on bo...
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Online Access: | https://researchdata.edu.au/wilkes-land-glacial-history-wega/2822283 |
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ftands:oai:ands.org.au::2822283 2024-09-15T17:42:09+00:00 Wilkes Land Glacial History (WEGA) AADC (owner) AADC, DATA OFFICER (distributor) AADC, DATA OFFICER (custodian) AU/AADC > Australian Antarctic Data Centre, Australia (hasAssociationWith) Australian Antarctic Data Centre (publisher) Geoscience Australia (sponsor) HARRIS, PETER TOWNSEND (collaborator) HARRIS, PETER TOWNSEND (hasPrincipalInvestigator) HARRIS, PETER TOWNSEND (author) Harris, P.T. (originator) Spatial: westlimit=142.0; southlimit=-67.5; eastlimit=146.0; northlimit=-64.0 Spatial: uplimit=3500; downlimit=100 Temporal: From 2000-09-30 to 2001-03-31 https://researchdata.edu.au/wilkes-land-glacial-history-wega/2822283 unknown Australian Ocean Data Network https://researchdata.edu.au/wilkes-land-glacial-history-wega/2822283 ASAC_1044 AU/AADC > Australian Antarctic Data Centre, Australia climatologyMeteorologyAtmosphere elevation geoscientificInformation oceans EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > SEAFLOOR TOPOGRAPHY WATER DEPTH COASTAL PROCESSES > SEDIMENT TRANSPORT SEDIMENTATION CONTINENTAL MARGINS MARINE SEDIMENTS > SEDIMENT COMPOSITION STRATIGRAPHIC SEQUENCE TERRIGENOUS SEDIMENTS TURBIDITY dataset ftands 2024-08-06T01:58:58Z Progress Code: completed Statement: Values provided in temporal coverage are approximate only. A collaborative Italian/Australian marine geoscience research voyage to the George Vth Land sector of the East Antarctic continental margin was carried out between 11th February and 20th March, 2000, on board the of the RV Tangaroa. The cost of the expedition was shared jointly by the Italian and Australian National Antarctic Research Programs. Twenty four scientific personnel from 13 institutions participated in the expedition. The geophysical data collected includes a total of 1827 km of multi-channel seismic data and 562 km of Chirper sonar data. A total of 11 gravity cores, 28 piston cores, 18 surface grabs and 11 short trigger cores were collected on the voyage. Water profile (CTD) measurements and water samples were collected at nine stations and seabed bottom photographs were made at 11 stations. The expedition discovered and mapped a shelf sediment drift deposit covering about 400 km2 lying in an greater than 800m deep section of the George Vth basin west of the Mertz Glacier. It is a true 'drift' deposit, since these sediments exhibit a patchy distribution, large-scale bedforms, contain foreset bedding and display a depositional architecture indicative of contour-parallel sediment transport. A significant observation is that the drift thins to the north into an acoustically-transparent veneer; this observation implies that the drift is sourced from the outer continental shelf, with sediment being transported landwards, across the shelf and into an 850m deep inner shelf basin. The 'Mertz Drift' is over 35 m thick and core samples demonstrate that it is composed of laminated, anoxic, gelatinous olive green, silicious mud and diatom ooze (SMO). Preliminary shipboard counts of the laminae suggest a thickness of from 4 to 20mm, with a mean of about 7mm. While the lower sediments are laminated, there is a 20 to 50cm thick sandy drape at the surface over the whole of the drift. This suggests that a recent (late ... Dataset Antarc* Antarctic Mertz Glacier Wilkes Land Research Data Australia (Australian National Data Service - ANDS) |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
climatologyMeteorologyAtmosphere elevation geoscientificInformation oceans EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > SEAFLOOR TOPOGRAPHY WATER DEPTH COASTAL PROCESSES > SEDIMENT TRANSPORT SEDIMENTATION CONTINENTAL MARGINS MARINE SEDIMENTS > SEDIMENT COMPOSITION STRATIGRAPHIC SEQUENCE TERRIGENOUS SEDIMENTS TURBIDITY |
spellingShingle |
climatologyMeteorologyAtmosphere elevation geoscientificInformation oceans EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > SEAFLOOR TOPOGRAPHY WATER DEPTH COASTAL PROCESSES > SEDIMENT TRANSPORT SEDIMENTATION CONTINENTAL MARGINS MARINE SEDIMENTS > SEDIMENT COMPOSITION STRATIGRAPHIC SEQUENCE TERRIGENOUS SEDIMENTS TURBIDITY Wilkes Land Glacial History (WEGA) |
topic_facet |
climatologyMeteorologyAtmosphere elevation geoscientificInformation oceans EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > SEAFLOOR TOPOGRAPHY WATER DEPTH COASTAL PROCESSES > SEDIMENT TRANSPORT SEDIMENTATION CONTINENTAL MARGINS MARINE SEDIMENTS > SEDIMENT COMPOSITION STRATIGRAPHIC SEQUENCE TERRIGENOUS SEDIMENTS TURBIDITY |
description |
Progress Code: completed Statement: Values provided in temporal coverage are approximate only. A collaborative Italian/Australian marine geoscience research voyage to the George Vth Land sector of the East Antarctic continental margin was carried out between 11th February and 20th March, 2000, on board the of the RV Tangaroa. The cost of the expedition was shared jointly by the Italian and Australian National Antarctic Research Programs. Twenty four scientific personnel from 13 institutions participated in the expedition. The geophysical data collected includes a total of 1827 km of multi-channel seismic data and 562 km of Chirper sonar data. A total of 11 gravity cores, 28 piston cores, 18 surface grabs and 11 short trigger cores were collected on the voyage. Water profile (CTD) measurements and water samples were collected at nine stations and seabed bottom photographs were made at 11 stations. The expedition discovered and mapped a shelf sediment drift deposit covering about 400 km2 lying in an greater than 800m deep section of the George Vth basin west of the Mertz Glacier. It is a true 'drift' deposit, since these sediments exhibit a patchy distribution, large-scale bedforms, contain foreset bedding and display a depositional architecture indicative of contour-parallel sediment transport. A significant observation is that the drift thins to the north into an acoustically-transparent veneer; this observation implies that the drift is sourced from the outer continental shelf, with sediment being transported landwards, across the shelf and into an 850m deep inner shelf basin. The 'Mertz Drift' is over 35 m thick and core samples demonstrate that it is composed of laminated, anoxic, gelatinous olive green, silicious mud and diatom ooze (SMO). Preliminary shipboard counts of the laminae suggest a thickness of from 4 to 20mm, with a mean of about 7mm. While the lower sediments are laminated, there is a 20 to 50cm thick sandy drape at the surface over the whole of the drift. This suggests that a recent (late ... |
author2 |
AADC (owner) AADC, DATA OFFICER (distributor) AADC, DATA OFFICER (custodian) AU/AADC > Australian Antarctic Data Centre, Australia (hasAssociationWith) Australian Antarctic Data Centre (publisher) Geoscience Australia (sponsor) HARRIS, PETER TOWNSEND (collaborator) HARRIS, PETER TOWNSEND (hasPrincipalInvestigator) HARRIS, PETER TOWNSEND (author) Harris, P.T. (originator) |
format |
Dataset |
title |
Wilkes Land Glacial History (WEGA) |
title_short |
Wilkes Land Glacial History (WEGA) |
title_full |
Wilkes Land Glacial History (WEGA) |
title_fullStr |
Wilkes Land Glacial History (WEGA) |
title_full_unstemmed |
Wilkes Land Glacial History (WEGA) |
title_sort |
wilkes land glacial history (wega) |
publisher |
Australian Ocean Data Network |
url |
https://researchdata.edu.au/wilkes-land-glacial-history-wega/2822283 |
op_coverage |
Spatial: westlimit=142.0; southlimit=-67.5; eastlimit=146.0; northlimit=-64.0 Spatial: uplimit=3500; downlimit=100 Temporal: From 2000-09-30 to 2001-03-31 |
genre |
Antarc* Antarctic Mertz Glacier Wilkes Land |
genre_facet |
Antarc* Antarctic Mertz Glacier Wilkes Land |
op_source |
AU/AADC > Australian Antarctic Data Centre, Australia |
op_relation |
https://researchdata.edu.au/wilkes-land-glacial-history-wega/2822283 ASAC_1044 |
_version_ |
1810488602869628928 |