Recent hydrovolcanic deposits with evidence of magmatic immiscibility on Deception Island, Antarctica

Outcrops of hydro-volcanic deposits on Deception Island are stratigraphically re-classified. The sequence was assigned to a pre-caldera phase, but it has very different compositional and consolidation characteristics, enabling it to be differentiated and redefined as a new unit. In this paper, it is...

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Detalles Bibliográficos
Autores principales: Caselli, A.T., Agusto, M.R.
Formato: JOUR
Materias:
Antarctica
Deception Island
Historical eruptions
Hydrovolcanism
immiscibility
magma
volcanic eruption
Arctic and Antarctic
South Shetland Islands
World
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v59_n3_p495_Caselli
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00044822_v59_n3_p495_Caselli
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spelling todo:paper_00044822_v59_n3_p495_Caselli2023-10-03T13:57:58Z Recent hydrovolcanic deposits with evidence of magmatic immiscibility on Deception Island, Antarctica Caselli, A.T. Agusto, M.R. Antarctica Deception Island Historical eruptions Hydrovolcanism immiscibility magma volcanic eruption Antarctica Arctic and Antarctic Deception Island South Shetland Islands World Outcrops of hydro-volcanic deposits on Deception Island are stratigraphically re-classified. The sequence was assigned to a pre-caldera phase, but it has very different compositional and consolidation characteristics, enabling it to be differentiated and redefined as a new unit. In this paper, it is stratigraphically relocated as a historical eruption, on the basis of its compositional similarity to ash-falls in Bransfield Basin. The studied deposits are bimodal (basaltic/rhyolitic) implying a relationship with magma immiscibility. The occurrence of more acidic periods would allow relatively more explosive vents with greater particle dispersion to take place. © 2004 Asociación Geológica Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v59_n3_p495_Caselli
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Antarctica
Deception Island
Historical eruptions
Hydrovolcanism
immiscibility
magma
volcanic eruption
Antarctica
Arctic and Antarctic
Deception Island
South Shetland Islands
World
spellingShingle Antarctica
Deception Island
Historical eruptions
Hydrovolcanism
immiscibility
magma
volcanic eruption
Antarctica
Arctic and Antarctic
Deception Island
South Shetland Islands
World
Caselli, A.T.
Agusto, M.R.
Recent hydrovolcanic deposits with evidence of magmatic immiscibility on Deception Island, Antarctica
topic_facet Antarctica
Deception Island
Historical eruptions
Hydrovolcanism
immiscibility
magma
volcanic eruption
Antarctica
Arctic and Antarctic
Deception Island
South Shetland Islands
World
description Outcrops of hydro-volcanic deposits on Deception Island are stratigraphically re-classified. The sequence was assigned to a pre-caldera phase, but it has very different compositional and consolidation characteristics, enabling it to be differentiated and redefined as a new unit. In this paper, it is stratigraphically relocated as a historical eruption, on the basis of its compositional similarity to ash-falls in Bransfield Basin. The studied deposits are bimodal (basaltic/rhyolitic) implying a relationship with magma immiscibility. The occurrence of more acidic periods would allow relatively more explosive vents with greater particle dispersion to take place. © 2004 Asociación Geológica Argentina.
format JOUR
author Caselli, A.T.
Agusto, M.R.
author_facet Caselli, A.T.
Agusto, M.R.
author_sort Caselli, A.T.
title Recent hydrovolcanic deposits with evidence of magmatic immiscibility on Deception Island, Antarctica
title_short Recent hydrovolcanic deposits with evidence of magmatic immiscibility on Deception Island, Antarctica
title_full Recent hydrovolcanic deposits with evidence of magmatic immiscibility on Deception Island, Antarctica
title_fullStr Recent hydrovolcanic deposits with evidence of magmatic immiscibility on Deception Island, Antarctica
title_full_unstemmed Recent hydrovolcanic deposits with evidence of magmatic immiscibility on Deception Island, Antarctica
title_sort recent hydrovolcanic deposits with evidence of magmatic immiscibility on deception island, antarctica
url http://hdl.handle.net/20.500.12110/paper_00044822_v59_n3_p495_Caselli
work_keys_str_mv AT caselliat recenthydrovolcanicdepositswithevidenceofmagmaticimmiscibilityondeceptionislandantarctica
AT agustomr recenthydrovolcanicdepositswithevidenceofmagmaticimmiscibilityondeceptionislandantarctica
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