Phase equilibria of Pantelleria trachytes (Italy): constraints on pre-eruptive conditions and on the metaluminous to peralkaline transition in silicic magmas.
Pantelleria Island is the type locality of pantellerite, an iron and alkali-rich rhyolite (P.I=molar Na2O+K2O/Al2O3 >1.05). Peralkaline rhyolites (i.e pantellerite and comendite) and trachytes usually represent the felsic end-members in continental rift systems (e.g., Pantelleria, Tibesti, Ethiop...
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Online Access: | http://hdl.handle.net/10447/282449 https://doi.org/10.1093/petrology/egy037 |
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ftunivpalermo:oai:iris.unipa.it:10447/282449 2024-02-11T10:04:27+01:00 Phase equilibria of Pantelleria trachytes (Italy): constraints on pre-eruptive conditions and on the metaluminous to peralkaline transition in silicic magmas. Pierangelo Romano Joan Andujar Bruno Scaillet Nunzia Romengo Ida di Carlo Silvio G. Rotolo Pierangelo Romano, Joan Andujar, Bruno Scaillet, Nunzia Romengo, Ida di Carlo, Silvio G. Rotolo 2018 http://hdl.handle.net/10447/282449 https://doi.org/10.1093/petrology/egy037 eng eng Oxford University Press country:GB info:eu-repo/semantics/altIdentifier/wos/WOS:000438296700007 volume:59 issue:3 firstpage:559 lastpage:588 numberofpages:29 journal:JOURNAL OF PETROLOGY http://hdl.handle.net/10447/282449 doi:10.1093/petrology/egy037 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85050813853 info:eu-repo/semantics/closedAccess peralkaline silicic magmatism experimental petrology trachyte 62 pantellerite 63 liquid line of descent Pantelleria Settore GEO/07 - Petrologia E Petrografia info:eu-repo/semantics/article 2018 ftunivpalermo https://doi.org/10.1093/petrology/egy037 2024-01-23T23:28:17Z Pantelleria Island is the type locality of pantellerite, an iron and alkali-rich rhyolite (P.I=molar Na2O+K2O/Al2O3 >1.05). Peralkaline rhyolites (i.e pantellerite and comendite) and trachytes usually represent the felsic end-members in continental rift systems (e.g., Pantelleria, Tibesti, Ethiopia, Afar, Kenya, Bain and Range, South Greenland) and in oceanic sland settings (Socorro Is., Easter Is., Iceland and Azores). The origin of peralkaline rhyolites in the different tectonic settings is still a matter of debate and three hypotheses have been suggested: (a) crystal fractionation of alkali-basalt in a shallow reservoir to produce a trachyte which subsequently gives rise to a pantellerite (e.g., Barberi et al., 1975, Mungall & Martin 1995, Civetta et al., 1998,) (b) partial melting of cumulate gabbros to form a trachyte which then produces pantellerite (e.g., Lowestern & Mahood 1991; Bohrson & Reid 1997), (c) partial melting of different lithospheric sources fluxed by volatiles which add the excess alkalies to the melt (Bailey & Macdonald, 1975, 1987). Recent petrological work has helped to define the temperature range and redox conditions of pantellerite magmas (Scaillet & Macdonald 2001, 2003, 2006; White et al., 2005, 2009; Di Carlo et al., 2010,) as well as their pre-eruptive volatile contents (e.g., Gioncada & Landi 2010, Neave et al., 2012, Lanzo et al., 2013). In contrast little is known about the conditions of storage and evolution of the associated trachytes. At Pantelleria, trachytes and pantellerites constitute most of the outcropping rocks, the former being erupted dominantly as lava flows while pantellerites are erupted either explosively or effusively. We have experimentally investigated the phase relationship of two representative trachytes from Pantelleria island in order to shed light on their pre-eruptive conditions (pressure, temperature, H2Omelt, oxygen fugacity) and define their liquid lines of descent toward more evolved compositions. We have established the ... Article in Journal/Newspaper Greenland Iceland IRIS Università degli Studi di Palermo Bain ENVELOPE(-65.433,-65.433,-66.550,-66.550) Greenland Journal of Petrology 59 3 559 588 |
institution |
Open Polar |
collection |
IRIS Università degli Studi di Palermo |
op_collection_id |
ftunivpalermo |
language |
English |
topic |
peralkaline silicic magmatism experimental petrology trachyte 62 pantellerite 63 liquid line of descent Pantelleria Settore GEO/07 - Petrologia E Petrografia |
spellingShingle |
peralkaline silicic magmatism experimental petrology trachyte 62 pantellerite 63 liquid line of descent Pantelleria Settore GEO/07 - Petrologia E Petrografia Pierangelo Romano Joan Andujar Bruno Scaillet Nunzia Romengo Ida di Carlo Silvio G. Rotolo Phase equilibria of Pantelleria trachytes (Italy): constraints on pre-eruptive conditions and on the metaluminous to peralkaline transition in silicic magmas. |
topic_facet |
peralkaline silicic magmatism experimental petrology trachyte 62 pantellerite 63 liquid line of descent Pantelleria Settore GEO/07 - Petrologia E Petrografia |
description |
Pantelleria Island is the type locality of pantellerite, an iron and alkali-rich rhyolite (P.I=molar Na2O+K2O/Al2O3 >1.05). Peralkaline rhyolites (i.e pantellerite and comendite) and trachytes usually represent the felsic end-members in continental rift systems (e.g., Pantelleria, Tibesti, Ethiopia, Afar, Kenya, Bain and Range, South Greenland) and in oceanic sland settings (Socorro Is., Easter Is., Iceland and Azores). The origin of peralkaline rhyolites in the different tectonic settings is still a matter of debate and three hypotheses have been suggested: (a) crystal fractionation of alkali-basalt in a shallow reservoir to produce a trachyte which subsequently gives rise to a pantellerite (e.g., Barberi et al., 1975, Mungall & Martin 1995, Civetta et al., 1998,) (b) partial melting of cumulate gabbros to form a trachyte which then produces pantellerite (e.g., Lowestern & Mahood 1991; Bohrson & Reid 1997), (c) partial melting of different lithospheric sources fluxed by volatiles which add the excess alkalies to the melt (Bailey & Macdonald, 1975, 1987). Recent petrological work has helped to define the temperature range and redox conditions of pantellerite magmas (Scaillet & Macdonald 2001, 2003, 2006; White et al., 2005, 2009; Di Carlo et al., 2010,) as well as their pre-eruptive volatile contents (e.g., Gioncada & Landi 2010, Neave et al., 2012, Lanzo et al., 2013). In contrast little is known about the conditions of storage and evolution of the associated trachytes. At Pantelleria, trachytes and pantellerites constitute most of the outcropping rocks, the former being erupted dominantly as lava flows while pantellerites are erupted either explosively or effusively. We have experimentally investigated the phase relationship of two representative trachytes from Pantelleria island in order to shed light on their pre-eruptive conditions (pressure, temperature, H2Omelt, oxygen fugacity) and define their liquid lines of descent toward more evolved compositions. We have established the ... |
author2 |
Pierangelo Romano, Joan Andujar, Bruno Scaillet, Nunzia Romengo, Ida di Carlo, Silvio G. Rotolo |
format |
Article in Journal/Newspaper |
author |
Pierangelo Romano Joan Andujar Bruno Scaillet Nunzia Romengo Ida di Carlo Silvio G. Rotolo |
author_facet |
Pierangelo Romano Joan Andujar Bruno Scaillet Nunzia Romengo Ida di Carlo Silvio G. Rotolo |
author_sort |
Pierangelo Romano |
title |
Phase equilibria of Pantelleria trachytes (Italy): constraints on pre-eruptive conditions and on the metaluminous to peralkaline transition in silicic magmas. |
title_short |
Phase equilibria of Pantelleria trachytes (Italy): constraints on pre-eruptive conditions and on the metaluminous to peralkaline transition in silicic magmas. |
title_full |
Phase equilibria of Pantelleria trachytes (Italy): constraints on pre-eruptive conditions and on the metaluminous to peralkaline transition in silicic magmas. |
title_fullStr |
Phase equilibria of Pantelleria trachytes (Italy): constraints on pre-eruptive conditions and on the metaluminous to peralkaline transition in silicic magmas. |
title_full_unstemmed |
Phase equilibria of Pantelleria trachytes (Italy): constraints on pre-eruptive conditions and on the metaluminous to peralkaline transition in silicic magmas. |
title_sort |
phase equilibria of pantelleria trachytes (italy): constraints on pre-eruptive conditions and on the metaluminous to peralkaline transition in silicic magmas. |
publisher |
Oxford University Press |
publishDate |
2018 |
url |
http://hdl.handle.net/10447/282449 https://doi.org/10.1093/petrology/egy037 |
long_lat |
ENVELOPE(-65.433,-65.433,-66.550,-66.550) |
geographic |
Bain Greenland |
geographic_facet |
Bain Greenland |
genre |
Greenland Iceland |
genre_facet |
Greenland Iceland |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000438296700007 volume:59 issue:3 firstpage:559 lastpage:588 numberofpages:29 journal:JOURNAL OF PETROLOGY http://hdl.handle.net/10447/282449 doi:10.1093/petrology/egy037 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85050813853 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1093/petrology/egy037 |
container_title |
Journal of Petrology |
container_volume |
59 |
container_issue |
3 |
container_start_page |
559 |
op_container_end_page |
588 |
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1790601057320042496 |