Next Article in Journal
Effect of Flowing Water on Sr Sorption Changes of Hydrous Sodium Titanate
Previous Article in Journal
Anomalously High Cretaceous Paleobrine Temperatures: Hothouse, Hydrothermal or Solar Heating?
 
 
Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
Journals
Minerals
Volume 7
Issue 12
10.3390/min7120246
minerals-logo
Submit to this Journal Review for this Journal Propose a Special Issue
► Article Menu

Article Menu

share Share announcement Help format_quote Cite question_answer Discuss in SciProfiles
first_page
settings
Order Article Reprints
Font Type:
Arial Georgia Verdana
Font Size:
Aa Aa Aa
Line Spacing:
Column Width:
Background:
Article

Fe–Ti(–V) Oxide Deposits of the Kunene Anorthosite Complex (SW Angola): Mineralogy and Thermo-Oxybarometry

by
Cristina Villanova-de-Benavent
1,*,
Lisard Torró
1,
Montgarri Castillo-Oliver
2,
Marc Campeny
1,3,
Joan Carles Melgarejo
1,
Xavier Llovet
4,
Salvador Galí
1 and
Antonio Olimpio Gonçalves
5
1
Departament de Mineralogia, Petrologia i Geologia Aplicada, Facultat de Geologia, Universitat de Barcelona, Martí i Franquès s/n, 08028 Barcelona, Spain
2
ARC Centre of Excellence for Core to Crust Fluid Systems and GEMOC, Department of Earth and Planetary Sciences, Macquarie University, Sydney, NSW 2019, Australia
3
Departament de Mineralogia, Museu de Ciències Naturals de Barcelona, Pg. Picasso s/n, 08003 Barcelona, Spain
4
Centres Científics i Tecnològics, Universitat de Barcelona, Lluís Solé i Sabarís, 1-3, 08028 Barcelona, Spain
5
Departamento de Geologia, Universidade Agostinho Neto, Av. 4 de Fevereiro 71, 815 Luanda, Angola
*
Author to whom correspondence should be addressed.
Minerals 2017, 7(12), 246; https://doi.org/10.3390/min7120246
Submission received: 25 October 2017 / Revised: 10 December 2017 / Accepted: 12 December 2017 / Published: 14 December 2017
Browse Figures
Versions Notes

Abstract

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.
Keywords: titaniferous magnetite; ilmenite; exsolution; nelsonite; massif-type anorthosite; Fe–Ti oxide thermometry titaniferous magnetite; ilmenite; exsolution; nelsonite; massif-type anorthosite; Fe–Ti oxide thermometry

Share and Cite

MDPI and ACS Style

Villanova-de-Benavent, C.; Torró, L.; Castillo-Oliver, M.; Campeny, M.; Melgarejo, J.C.; Llovet, X.; Galí, S.; Gonçalves, A.O. Fe–Ti(–V) Oxide Deposits of the Kunene Anorthosite Complex (SW Angola): Mineralogy and Thermo-Oxybarometry. Minerals 2017, 7, 246. https://doi.org/10.3390/min7120246

AMA Style

Villanova-de-Benavent C, Torró L, Castillo-Oliver M, Campeny M, Melgarejo JC, Llovet X, Galí S, Gonçalves AO. Fe–Ti(–V) Oxide Deposits of the Kunene Anorthosite Complex (SW Angola): Mineralogy and Thermo-Oxybarometry. Minerals. 2017; 7(12):246. https://doi.org/10.3390/min7120246

Chicago/Turabian Style

Villanova-de-Benavent, Cristina, Lisard Torró, Montgarri Castillo-Oliver, Marc Campeny, Joan Carles Melgarejo, Xavier Llovet, Salvador Galí, and Antonio Olimpio Gonçalves. 2017. "Fe–Ti(–V) Oxide Deposits of the Kunene Anorthosite Complex (SW Angola): Mineralogy and Thermo-Oxybarometry" Minerals 7, no. 12: 246. https://doi.org/10.3390/min7120246

APA Style

Villanova-de-Benavent, C., Torró, L., Castillo-Oliver, M., Campeny, M., Melgarejo, J. C., Llovet, X., Galí, S., & Gonçalves, A. O. (2017). Fe–Ti(–V) Oxide Deposits of the Kunene Anorthosite Complex (SW Angola): Mineralogy and Thermo-Oxybarometry. Minerals, 7(12), 246. https://doi.org/10.3390/min7120246

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

Article Metrics

Back to TopTop