Stratigraphy, geochronology and evolution of the Mt. Melbourne volcanic field (North Victoria Land, Antarctica)
Mt. Melbourne (2,732 ma.s.l.) is a large quiescent stratovolcano located in Northern Victoria Land (Antarctica) and is one of a handful of volcanoes on the Antarctic plate with the potential for large-scale explosive eruptions. During the XVIII Italian Expedition in 2002– 2003, the Mt. Melbourne vol...
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ftunivroma3iris:oai:iris.uniroma3.it:11590/135637 2024-02-27T08:34:02+00:00 Stratigraphy, geochronology and evolution of the Mt. Melbourne volcanic field (North Victoria Land, Antarctica) GIORDANO, Guido Lucci F Phillips D Cozzupoli D Runci V. Giordano, Guido Lucci, F Phillips, D Cozzupoli, D Runci, V. 2012 http://hdl.handle.net/11590/135637 https://doi.org/10.1007/s00445-012-0643-8 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000310225400005 issue:74 firstpage:1985 lastpage:2005 numberofpages:21 journal:BULLETIN OF VOLCANOLOGY http://hdl.handle.net/11590/135637 doi:10.1007/s00445-012-0643-8 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84867848195 Antarctica . Explosive volcanism . Mt. Melbourne . Geochemistry Geochronology info:eu-repo/semantics/article 2012 ftunivroma3iris https://doi.org/10.1007/s00445-012-0643-8 2024-01-31T17:35:13Z Mt. Melbourne (2,732 ma.s.l.) is a large quiescent stratovolcano located in Northern Victoria Land (Antarctica) and is one of a handful of volcanoes on the Antarctic plate with the potential for large-scale explosive eruptions. During the XVIII Italian Expedition in 2002– 2003, the Mt. Melbourne volcanic succession was studied in terms of stratigraphy and sampled for 40Ar/39Ar age determinations and geochemistry. The early, Lower Pleistocene, volcanism was largely alkali basaltic to hawaiitic in composition and monogenetic in style, producing tens of small scoria cones and lava flows scattered over a wide area across the Transantarctic Mountains (Random Hills Period). During the Middle Pleistocene, volcanic activity focused to the area of the Mt. Melbourne stratovolcano, where several monogenetic centres show the transition from early subglacial/ subaqueous conditions to emergent subaerial conditions (Shield Nunatak Period). The oldest exposed deposit associated with the early activity of the Mt. Melbourne stratovolcano (Mt. Melbourne Period) is a trachytic subaerial ignimbrite dated at 123.6±6.0 ka, which reflects the establishment of a crustal magma chamber. Above the ignimbrite a succession of alkali basaltic, hawaiitic, and subordinate benmoreitic lavas and scoria cones is exposed, dated at 90.7±19.0 ka. The Holocene deposits are exposed at the top of Mt. Melbourne, where the crater rim is composed of trachytic to rhyolitic pumice fall deposits, which are also extensively dispersed around the volcano, likely originated from Plinian-scale eruptions. The most recent explosive deposit proved difficult to date accurately because very low quantities of radiogenic 40Ar were released, resulting in imprecise plateau ages of 50±70 and 35±22 ka. Article in Journal/Newspaper Antarc* Antarctic Antarctica Victoria Land Anagrafe della Ricerca d'Ateneo (Universitá degli studi Roma Tre) Antarctic The Antarctic Victoria Land Transantarctic Mountains Shield Nunatak ENVELOPE(164.500,164.500,-74.550,-74.550) Random Hills ENVELOPE(164.417,164.417,-74.117,-74.117) Bulletin of Volcanology 74 9 1985 2005 |
institution |
Open Polar |
collection |
Anagrafe della Ricerca d'Ateneo (Universitá degli studi Roma Tre) |
op_collection_id |
ftunivroma3iris |
language |
English |
topic |
Antarctica . Explosive volcanism . Mt. Melbourne . Geochemistry Geochronology |
spellingShingle |
Antarctica . Explosive volcanism . Mt. Melbourne . Geochemistry Geochronology GIORDANO, Guido Lucci F Phillips D Cozzupoli D Runci V. Stratigraphy, geochronology and evolution of the Mt. Melbourne volcanic field (North Victoria Land, Antarctica) |
topic_facet |
Antarctica . Explosive volcanism . Mt. Melbourne . Geochemistry Geochronology |
description |
Mt. Melbourne (2,732 ma.s.l.) is a large quiescent stratovolcano located in Northern Victoria Land (Antarctica) and is one of a handful of volcanoes on the Antarctic plate with the potential for large-scale explosive eruptions. During the XVIII Italian Expedition in 2002– 2003, the Mt. Melbourne volcanic succession was studied in terms of stratigraphy and sampled for 40Ar/39Ar age determinations and geochemistry. The early, Lower Pleistocene, volcanism was largely alkali basaltic to hawaiitic in composition and monogenetic in style, producing tens of small scoria cones and lava flows scattered over a wide area across the Transantarctic Mountains (Random Hills Period). During the Middle Pleistocene, volcanic activity focused to the area of the Mt. Melbourne stratovolcano, where several monogenetic centres show the transition from early subglacial/ subaqueous conditions to emergent subaerial conditions (Shield Nunatak Period). The oldest exposed deposit associated with the early activity of the Mt. Melbourne stratovolcano (Mt. Melbourne Period) is a trachytic subaerial ignimbrite dated at 123.6±6.0 ka, which reflects the establishment of a crustal magma chamber. Above the ignimbrite a succession of alkali basaltic, hawaiitic, and subordinate benmoreitic lavas and scoria cones is exposed, dated at 90.7±19.0 ka. The Holocene deposits are exposed at the top of Mt. Melbourne, where the crater rim is composed of trachytic to rhyolitic pumice fall deposits, which are also extensively dispersed around the volcano, likely originated from Plinian-scale eruptions. The most recent explosive deposit proved difficult to date accurately because very low quantities of radiogenic 40Ar were released, resulting in imprecise plateau ages of 50±70 and 35±22 ka. |
author2 |
Giordano, Guido Lucci, F Phillips, D Cozzupoli, D Runci, V. |
format |
Article in Journal/Newspaper |
author |
GIORDANO, Guido Lucci F Phillips D Cozzupoli D Runci V. |
author_facet |
GIORDANO, Guido Lucci F Phillips D Cozzupoli D Runci V. |
author_sort |
GIORDANO, Guido |
title |
Stratigraphy, geochronology and evolution of the Mt. Melbourne volcanic field (North Victoria Land, Antarctica) |
title_short |
Stratigraphy, geochronology and evolution of the Mt. Melbourne volcanic field (North Victoria Land, Antarctica) |
title_full |
Stratigraphy, geochronology and evolution of the Mt. Melbourne volcanic field (North Victoria Land, Antarctica) |
title_fullStr |
Stratigraphy, geochronology and evolution of the Mt. Melbourne volcanic field (North Victoria Land, Antarctica) |
title_full_unstemmed |
Stratigraphy, geochronology and evolution of the Mt. Melbourne volcanic field (North Victoria Land, Antarctica) |
title_sort |
stratigraphy, geochronology and evolution of the mt. melbourne volcanic field (north victoria land, antarctica) |
publishDate |
2012 |
url |
http://hdl.handle.net/11590/135637 https://doi.org/10.1007/s00445-012-0643-8 |
long_lat |
ENVELOPE(164.500,164.500,-74.550,-74.550) ENVELOPE(164.417,164.417,-74.117,-74.117) |
geographic |
Antarctic The Antarctic Victoria Land Transantarctic Mountains Shield Nunatak Random Hills |
geographic_facet |
Antarctic The Antarctic Victoria Land Transantarctic Mountains Shield Nunatak Random Hills |
genre |
Antarc* Antarctic Antarctica Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000310225400005 issue:74 firstpage:1985 lastpage:2005 numberofpages:21 journal:BULLETIN OF VOLCANOLOGY http://hdl.handle.net/11590/135637 doi:10.1007/s00445-012-0643-8 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84867848195 |
op_doi |
https://doi.org/10.1007/s00445-012-0643-8 |
container_title |
Bulletin of Volcanology |
container_volume |
74 |
container_issue |
9 |
container_start_page |
1985 |
op_container_end_page |
2005 |
_version_ |
1792050368491814912 |