Fe-Ti(-V) oxide deposits of the Kunene anorthosite complex (SW Angola): Mineralogy and thermo-oxybarometry

The Kunene Intrusive Complex (KIC), in NW Namibia and SW Angola, is one of the largest Proterozoic anorthosite massif-type exposures in the world. A geochemical, mineralogical and petrological study of four Fe-Ti(-V) oxide bodies located in the understudied Angolan part of the KIC has been performed...

Descripción completa

Detalles Bibliográficos
Autores: Villanova de Benavent, Cristina, Torró i Abat, Lisard, Castillo Oliver, Montgarri, Campeny, Marc, Melgarejo i Draper, Joan-Carles, Llovet Ximenes, Xavier, Galí Medina, Salvador, 1949-, Gonçalves, Antonio Olimpo
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2017
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/151679
Acceso en línea:https://hdl.handle.net/2445/151679
Access Level:acceso abierto
Palabra clave:Termometria
Magnetita
Temperature measurements
Magnetite
id ES_1a7f228c13d716925eece3fcddb671a3
oai_identifier_str oai:recercat.cat:2445/151679
network_acronym_str ES
network_name_str España
repository_id_str
spelling Fe-Ti(-V) oxide deposits of the Kunene anorthosite complex (SW Angola): Mineralogy and thermo-oxybarometryVillanova de Benavent, CristinaTorró i Abat, LisardCastillo Oliver, MontgarriCampeny, MarcMelgarejo i Draper, Joan-CarlesLlovet Ximenes, XavierGalí Medina, Salvador, 1949-Gonçalves, Antonio OlimpoTermometriaMagnetitaTemperature measurementsMagnetiteThe Kunene Intrusive Complex (KIC), in NW Namibia and SW Angola, is one of the largest Proterozoic anorthosite massif-type exposures in the world. A geochemical, mineralogical and petrological study of four Fe-Ti(-V) oxide bodies located in the understudied Angolan part of the KIC has been performed. The massive Fe-Ti(-V) oxide bodies, locally apatite-rich (nelsonites), are lenticular or dike-like. They consist mostly of titaniferous magnetite, ilmenite and minor aluminous spinel, apatite, olivine and graphite. Titaniferous magnetite displays a wide variety of subsolvus features, including aluminous spinel-magnetite-ulvöspinel exsolutions and ilmenite (Trellis) exsolutions. This work estimated the composition of the titaniferous magnetite prior to the exsolution, in order to calculate the temperature and oxygen fugacity of the different lithologies of each ore body. The thermo-oxybarometry results obtained range from 600 °C to 820 °C and fO2 from 10−24.7 to 10−14.7. These values do not correspond to magmatic crystallization in equilibrium, but to a later re-equilibration. In addition, the mineralogical and geochemical results indicate that the studied ore bodies contain economic reserves of Ti, V, and possibly of P and REE.MDPI2020202020172020info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion27 p.application/pdfapplication/pdfhttps://hdl.handle.net/2445/151679Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.3390/min7120246Minerals, 2017, vol. 7, num. 12, p. 246https://doi.org/10.3390/min7120246cc-by (c) Villanova de Benavent, Cristina et al., 2017http://creativecommons.org/licenses/by/3.0/esinfo:eu-repo/semantics/openAccessoai:recercat.cat:2445/1516792026-05-29T05:05:01Z
dc.title.none.fl_str_mv Fe-Ti(-V) oxide deposits of the Kunene anorthosite complex (SW Angola): Mineralogy and thermo-oxybarometry
title Fe-Ti(-V) oxide deposits of the Kunene anorthosite complex (SW Angola): Mineralogy and thermo-oxybarometry
spellingShingle Fe-Ti(-V) oxide deposits of the Kunene anorthosite complex (SW Angola): Mineralogy and thermo-oxybarometry
Villanova de Benavent, Cristina
Termometria
Magnetita
Temperature measurements
Magnetite
title_short Fe-Ti(-V) oxide deposits of the Kunene anorthosite complex (SW Angola): Mineralogy and thermo-oxybarometry
title_full Fe-Ti(-V) oxide deposits of the Kunene anorthosite complex (SW Angola): Mineralogy and thermo-oxybarometry
title_fullStr Fe-Ti(-V) oxide deposits of the Kunene anorthosite complex (SW Angola): Mineralogy and thermo-oxybarometry
title_full_unstemmed Fe-Ti(-V) oxide deposits of the Kunene anorthosite complex (SW Angola): Mineralogy and thermo-oxybarometry
title_sort Fe-Ti(-V) oxide deposits of the Kunene anorthosite complex (SW Angola): Mineralogy and thermo-oxybarometry
dc.creator.none.fl_str_mv Villanova de Benavent, Cristina
Torró i Abat, Lisard
Castillo Oliver, Montgarri
Campeny, Marc
Melgarejo i Draper, Joan-Carles
Llovet Ximenes, Xavier
Galí Medina, Salvador, 1949-
Gonçalves, Antonio Olimpo
author Villanova de Benavent, Cristina
author_facet Villanova de Benavent, Cristina
Torró i Abat, Lisard
Castillo Oliver, Montgarri
Campeny, Marc
Melgarejo i Draper, Joan-Carles
Llovet Ximenes, Xavier
Galí Medina, Salvador, 1949-
Gonçalves, Antonio Olimpo
author_role author
author2 Torró i Abat, Lisard
Castillo Oliver, Montgarri
Campeny, Marc
Melgarejo i Draper, Joan-Carles
Llovet Ximenes, Xavier
Galí Medina, Salvador, 1949-
Gonçalves, Antonio Olimpo
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Termometria
Magnetita
Temperature measurements
Magnetite
topic Termometria
Magnetita
Temperature measurements
Magnetite
description The Kunene Intrusive Complex (KIC), in NW Namibia and SW Angola, is one of the largest Proterozoic anorthosite massif-type exposures in the world. A geochemical, mineralogical and petrological study of four Fe-Ti(-V) oxide bodies located in the understudied Angolan part of the KIC has been performed. The massive Fe-Ti(-V) oxide bodies, locally apatite-rich (nelsonites), are lenticular or dike-like. They consist mostly of titaniferous magnetite, ilmenite and minor aluminous spinel, apatite, olivine and graphite. Titaniferous magnetite displays a wide variety of subsolvus features, including aluminous spinel-magnetite-ulvöspinel exsolutions and ilmenite (Trellis) exsolutions. This work estimated the composition of the titaniferous magnetite prior to the exsolution, in order to calculate the temperature and oxygen fugacity of the different lithologies of each ore body. The thermo-oxybarometry results obtained range from 600 °C to 820 °C and fO2 from 10−24.7 to 10−14.7. These values do not correspond to magmatic crystallization in equilibrium, but to a later re-equilibration. In addition, the mineralogical and geochemical results indicate that the studied ore bodies contain economic reserves of Ti, V, and possibly of P and REE.
publishDate 2017
dc.date.none.fl_str_mv 2017
2020
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/151679
url https://hdl.handle.net/2445/151679
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.3390/min7120246
Minerals, 2017, vol. 7, num. 12, p. 246
https://doi.org/10.3390/min7120246
dc.rights.none.fl_str_mv cc-by (c) Villanova de Benavent, Cristina et al., 2017
http://creativecommons.org/licenses/by/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Villanova de Benavent, Cristina et al., 2017
http://creativecommons.org/licenses/by/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 27 p.
application/pdf
application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869404109828784128
score 15,811543

Similares en LA Referencia