Framboidal pyrite in fumaroles on Deception Island (Antarctica): Genetic implications

Pyrite framboids have been recognized in fumaroles on Deception Island, Antarctica. The sulphide was deposited around reworked pyroclastic tephra (lapilli). The formation process starts as a reaction between glass and hydrogen sulphide, giving rise to nucleation and growth of iron monosulfide microc...

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Autores principales: Agusto, M.R., Caselli, A.T., dos Santos Afonso, M.
Formato: JOUR
Materias:
Antarctica
Deception Island
Framboids
Fumarole
Pyrite
crystallization
greigite
massive sulfide
pyrite
Arctic and Antarctic
South Shetland Islands
World
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v59_n1_p152_Agusto
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00044822_v59_n1_p152_Agusto
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spelling todo:paper_00044822_v59_n1_p152_Agusto2023-10-03T13:57:52Z Framboidal pyrite in fumaroles on Deception Island (Antarctica): Genetic implications Agusto, M.R. Caselli, A.T. dos Santos Afonso, M. Antarctica Deception Island Framboids Fumarole Pyrite crystallization greigite massive sulfide pyrite Antarctica Arctic and Antarctic Deception Island South Shetland Islands World Pyrite framboids have been recognized in fumaroles on Deception Island, Antarctica. The sulphide was deposited around reworked pyroclastic tephra (lapilli). The formation process starts as a reaction between glass and hydrogen sulphide, giving rise to nucleation and growth of iron monosulfide microcrystals. The microcrystals then convert to greigite, and form aggregates of uniformly sized microcrystals (development of framboids). Finally, greigite is replaced by pyrite. In this study pyrite was observed forming at 100°C in less than one hour. © 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_n1_p152_Agusto
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
Framboids
Fumarole
Pyrite
crystallization
greigite
massive sulfide
pyrite
Antarctica
Arctic and Antarctic
Deception Island
South Shetland Islands
World
spellingShingle Antarctica
Deception Island
Framboids
Fumarole
Pyrite
crystallization
greigite
massive sulfide
pyrite
Antarctica
Arctic and Antarctic
Deception Island
South Shetland Islands
World
Agusto, M.R.
Caselli, A.T.
dos Santos Afonso, M.
Framboidal pyrite in fumaroles on Deception Island (Antarctica): Genetic implications
topic_facet Antarctica
Deception Island
Framboids
Fumarole
Pyrite
crystallization
greigite
massive sulfide
pyrite
Antarctica
Arctic and Antarctic
Deception Island
South Shetland Islands
World
description Pyrite framboids have been recognized in fumaroles on Deception Island, Antarctica. The sulphide was deposited around reworked pyroclastic tephra (lapilli). The formation process starts as a reaction between glass and hydrogen sulphide, giving rise to nucleation and growth of iron monosulfide microcrystals. The microcrystals then convert to greigite, and form aggregates of uniformly sized microcrystals (development of framboids). Finally, greigite is replaced by pyrite. In this study pyrite was observed forming at 100°C in less than one hour. © 2004 Asociación Geológica Argentina.
format JOUR
author Agusto, M.R.
Caselli, A.T.
dos Santos Afonso, M.
author_facet Agusto, M.R.
Caselli, A.T.
dos Santos Afonso, M.
author_sort Agusto, M.R.
title Framboidal pyrite in fumaroles on Deception Island (Antarctica): Genetic implications
title_short Framboidal pyrite in fumaroles on Deception Island (Antarctica): Genetic implications
title_full Framboidal pyrite in fumaroles on Deception Island (Antarctica): Genetic implications
title_fullStr Framboidal pyrite in fumaroles on Deception Island (Antarctica): Genetic implications
title_full_unstemmed Framboidal pyrite in fumaroles on Deception Island (Antarctica): Genetic implications
title_sort framboidal pyrite in fumaroles on deception island (antarctica): genetic implications
url http://hdl.handle.net/20.500.12110/paper_00044822_v59_n1_p152_Agusto
work_keys_str_mv AT agustomr framboidalpyriteinfumarolesondeceptionislandantarcticageneticimplications
AT caselliat framboidalpyriteinfumarolesondeceptionislandantarcticageneticimplications
AT dossantosafonsom framboidalpyriteinfumarolesondeceptionislandantarcticageneticimplications
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