Fe–O stable isotope pairs elucidate a high-temperature origin of Chilean iron oxide-apatite deposits
Artículo de publicación ISI Iron oxide–apatite (IOA) ore deposits occur globally and can host millions to billions of tons of Fe in addition to economic reserves of other metals such as rare earth elements, which are critical for the expected growth of technology and renewable energy resources. In t...
Published in: | Geochimica et Cosmochimica Acta |
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ftunivchile:oai:repositorio.uchile.cl:2250/139202 2023-05-15T17:04:10+02:00 Fe–O stable isotope pairs elucidate a high-temperature origin of Chilean iron oxide-apatite deposits Bilenker, Laura Simon, Aadam Reich Morales, Martín Lundstrom, Craig Gajos, Norbert Bindeman, Ilya Barra Pantoja, Fernando Munizaga, Rodrigo 2016 application/pdf https://doi.org/10.1016/j.gca.2016.01.009 https://repositorio.uchile.cl/handle/2250/139202 en eng Elsevier Geochimica et Cosmochimica Acta 177 (2016) 94–104 0016-7037 doi:10.1016/j.gca.2016.01.009 https://repositorio.uchile.cl/handle/2250/139202 Atribución-NoComercial-SinDerivadas 3.0 Chile http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ CC-BY-NC-ND Magmatic-Hydrothermal Processes Oxygen-Isotope Kiruna-Type Cooper-Gold Liquid Immiscibility British-Columbia Northern Chile Magnetite Ores Mineralization Artículo de revista 2016 ftunivchile https://doi.org/10.1016/j.gca.2016.01.009 2023-01-22T01:04:21Z Artículo de publicación ISI Iron oxide–apatite (IOA) ore deposits occur globally and can host millions to billions of tons of Fe in addition to economic reserves of other metals such as rare earth elements, which are critical for the expected growth of technology and renewable energy resources. In this study, we pair the stable Fe and O isotope compositions of magnetite samples from several IOA deposits to constrain the source reservoir of these elements in IOAs. Since magnetite constitutes up to 90 modal% of many IOAs, identifying the source of Fe and O within the magnetite may elucidate high-temperature and/or lower-temperature processes responsible for their formation. Here, we focus on the world-class Los Colorados IOA in the Chilean iron belt (CIB), and present data for magnetite from other Fe oxide deposits in the CIB (El Laco, Mariela). We also report Fe and O isotopic values for other IOA deposits, including Mineville, New York (USA) and the type locale, Kiruna (Sweden). The ranges of Fe isotopic composition (d56Fe, 56Fe/54Fe relative to IRMM-14) of magnetite from the Chilean deposits are: Los Colorados, d56Fe (±2r) = 0.08 ± 0.03‰ to 0.24 ± 0.08‰; El Laco, d56Fe = 0.20 ± 0.03‰ to 0.53 ± 0.03‰; Mariela, d56Fe = 0.13 ± 0.03‰. The O isotopic composition (d18O, 18O/16O relative to VSMOW) of the same Chilean magnetite samples are: Los Colorados, d18O (±2r) = 1.92 ± 0.08‰ to 3.17 ± 0.03‰; El Laco, d18O = 4.00 ± 0.10‰ to 4.34 ± 0.10‰; Mariela, d18O = (1.48 ± 0.04‰). The d18O and d56Fe values for Kiruna magnetite yield an average of 1.76 ± 0.25‰ and 0.16 ± 0.07‰, respectively. The Fe and O isotope data from the Chilean IOAs fit unequivocally within the range of magnetite formed by high-temperature magmatic or magmatic–hydrothermal processes (i.e., d56Fe 0.06–0.49‰ and d18O = 1.0– 4.5‰), consistent with a high-temperature origin for Chilean IOA deposits. Additionally, minimum formation temperatures calculated by using the measured D18O values of coexisting Los Colorados magnetite and actinolite separates (630 ... Article in Journal/Newspaper Kiruna Universidad de Chile: Repositorio académico Isi ENVELOPE(-38.550,-38.550,65.617,65.617) Kiruna Geochimica et Cosmochimica Acta 177 94 104 |
institution |
Open Polar |
collection |
Universidad de Chile: Repositorio académico |
op_collection_id |
ftunivchile |
language |
English |
topic |
Magmatic-Hydrothermal Processes Oxygen-Isotope Kiruna-Type Cooper-Gold Liquid Immiscibility British-Columbia Northern Chile Magnetite Ores Mineralization |
spellingShingle |
Magmatic-Hydrothermal Processes Oxygen-Isotope Kiruna-Type Cooper-Gold Liquid Immiscibility British-Columbia Northern Chile Magnetite Ores Mineralization Bilenker, Laura Simon, Aadam Reich Morales, Martín Lundstrom, Craig Gajos, Norbert Bindeman, Ilya Barra Pantoja, Fernando Munizaga, Rodrigo Fe–O stable isotope pairs elucidate a high-temperature origin of Chilean iron oxide-apatite deposits |
topic_facet |
Magmatic-Hydrothermal Processes Oxygen-Isotope Kiruna-Type Cooper-Gold Liquid Immiscibility British-Columbia Northern Chile Magnetite Ores Mineralization |
description |
Artículo de publicación ISI Iron oxide–apatite (IOA) ore deposits occur globally and can host millions to billions of tons of Fe in addition to economic reserves of other metals such as rare earth elements, which are critical for the expected growth of technology and renewable energy resources. In this study, we pair the stable Fe and O isotope compositions of magnetite samples from several IOA deposits to constrain the source reservoir of these elements in IOAs. Since magnetite constitutes up to 90 modal% of many IOAs, identifying the source of Fe and O within the magnetite may elucidate high-temperature and/or lower-temperature processes responsible for their formation. Here, we focus on the world-class Los Colorados IOA in the Chilean iron belt (CIB), and present data for magnetite from other Fe oxide deposits in the CIB (El Laco, Mariela). We also report Fe and O isotopic values for other IOA deposits, including Mineville, New York (USA) and the type locale, Kiruna (Sweden). The ranges of Fe isotopic composition (d56Fe, 56Fe/54Fe relative to IRMM-14) of magnetite from the Chilean deposits are: Los Colorados, d56Fe (±2r) = 0.08 ± 0.03‰ to 0.24 ± 0.08‰; El Laco, d56Fe = 0.20 ± 0.03‰ to 0.53 ± 0.03‰; Mariela, d56Fe = 0.13 ± 0.03‰. The O isotopic composition (d18O, 18O/16O relative to VSMOW) of the same Chilean magnetite samples are: Los Colorados, d18O (±2r) = 1.92 ± 0.08‰ to 3.17 ± 0.03‰; El Laco, d18O = 4.00 ± 0.10‰ to 4.34 ± 0.10‰; Mariela, d18O = (1.48 ± 0.04‰). The d18O and d56Fe values for Kiruna magnetite yield an average of 1.76 ± 0.25‰ and 0.16 ± 0.07‰, respectively. The Fe and O isotope data from the Chilean IOAs fit unequivocally within the range of magnetite formed by high-temperature magmatic or magmatic–hydrothermal processes (i.e., d56Fe 0.06–0.49‰ and d18O = 1.0– 4.5‰), consistent with a high-temperature origin for Chilean IOA deposits. Additionally, minimum formation temperatures calculated by using the measured D18O values of coexisting Los Colorados magnetite and actinolite separates (630 ... |
format |
Article in Journal/Newspaper |
author |
Bilenker, Laura Simon, Aadam Reich Morales, Martín Lundstrom, Craig Gajos, Norbert Bindeman, Ilya Barra Pantoja, Fernando Munizaga, Rodrigo |
author_facet |
Bilenker, Laura Simon, Aadam Reich Morales, Martín Lundstrom, Craig Gajos, Norbert Bindeman, Ilya Barra Pantoja, Fernando Munizaga, Rodrigo |
author_sort |
Bilenker, Laura |
title |
Fe–O stable isotope pairs elucidate a high-temperature origin of Chilean iron oxide-apatite deposits |
title_short |
Fe–O stable isotope pairs elucidate a high-temperature origin of Chilean iron oxide-apatite deposits |
title_full |
Fe–O stable isotope pairs elucidate a high-temperature origin of Chilean iron oxide-apatite deposits |
title_fullStr |
Fe–O stable isotope pairs elucidate a high-temperature origin of Chilean iron oxide-apatite deposits |
title_full_unstemmed |
Fe–O stable isotope pairs elucidate a high-temperature origin of Chilean iron oxide-apatite deposits |
title_sort |
fe–o stable isotope pairs elucidate a high-temperature origin of chilean iron oxide-apatite deposits |
publisher |
Elsevier |
publishDate |
2016 |
url |
https://doi.org/10.1016/j.gca.2016.01.009 https://repositorio.uchile.cl/handle/2250/139202 |
long_lat |
ENVELOPE(-38.550,-38.550,65.617,65.617) |
geographic |
Isi Kiruna |
geographic_facet |
Isi Kiruna |
genre |
Kiruna |
genre_facet |
Kiruna |
op_relation |
Geochimica et Cosmochimica Acta 177 (2016) 94–104 0016-7037 doi:10.1016/j.gca.2016.01.009 https://repositorio.uchile.cl/handle/2250/139202 |
op_rights |
Atribución-NoComercial-SinDerivadas 3.0 Chile http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.gca.2016.01.009 |
container_title |
Geochimica et Cosmochimica Acta |
container_volume |
177 |
container_start_page |
94 |
op_container_end_page |
104 |
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1766058214739148800 |