Multiple Stage Ore Formation in the Chadormalu Iron Deposit, Bafq Metallogenic Province, Central Iran: Evidence from BSE Imaging and Apatite EPMA and LA-ICP-MS U-Pb Geochronology
The Chadormalu magnetite-apatite deposit in Bafq metallogenic province, Central Iran, is hosted in the late Precambrian-lower Cambrian volcano-sedimentary rocks with sodic, calcic, and potassic alterations characteristic of iron oxide copper-gold (IOCG) and iron oxide-apatite (IOA) ore systems. Apat...
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ftmdpi:oai:mdpi.com:/2075-163X/8/3/87/ 2023-08-20T04:07:46+02:00 Multiple Stage Ore Formation in the Chadormalu Iron Deposit, Bafq Metallogenic Province, Central Iran: Evidence from BSE Imaging and Apatite EPMA and LA-ICP-MS U-Pb Geochronology Hassan Heidarian David R. Lentz Saeed Alirezaei Christopher R. M. McFarlane Sima Peighambari agris 2018-02-27 application/pdf https://doi.org/10.3390/min8030087 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/min8030087 https://creativecommons.org/licenses/by/4.0/ Minerals; Volume 8; Issue 3; Pages: 87 Chadormalu Kiruna-type iron oxide-apatite U-Pb geochronology Bafq Iran Text 2018 ftmdpi https://doi.org/10.3390/min8030087 2023-07-31T21:24:30Z The Chadormalu magnetite-apatite deposit in Bafq metallogenic province, Central Iran, is hosted in the late Precambrian-lower Cambrian volcano-sedimentary rocks with sodic, calcic, and potassic alterations characteristic of iron oxide copper-gold (IOCG) and iron oxide-apatite (IOA) ore systems. Apatite occurs as scattered irregular veinlets and disseminated grains, respectively, within and in the marginal parts of the main ore-body, as well as apatite-magnetite veins in altered wall rocks. Textural evidence (SEM-BSE images) of these apatites shows primary bright, and secondary dark areas with inclusions of monazite/xenotime. The primary, monazite-free fluorapatite contains higher concentrations of Na, Si, S, and light rare earth elements (LREE). The apatite was altered by hydrothermal events that led to leaching of Na, Si, and REE + Y, and development of the dark apatite. The bright apatite yielded two U-Pb age populations, an older dominant age of 490 ± 21 Ma, similar to other iron deposits in the Bafq district and associated intrusions, and a younger age of 246 ± 17 Ma. The dark apatite yielded a U-Pb age of 437 ± 12 Ma. Our data suggest that hydrothermal magmatic fluids contributed to formation of the primary fluorapatite, and sodic and calcic alterations. The primary apatite reequilibrated with basinal brines in at least two regional extensions and basin developments in Silurian and Triassic in Central Iran. Text Kiruna MDPI Open Access Publishing Kiruna Wall Rocks ENVELOPE(-129.312,-129.312,52.728,52.728) Minerals 8 3 87 |
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Open Polar |
collection |
MDPI Open Access Publishing |
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ftmdpi |
language |
English |
topic |
Chadormalu Kiruna-type iron oxide-apatite U-Pb geochronology Bafq Iran |
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Chadormalu Kiruna-type iron oxide-apatite U-Pb geochronology Bafq Iran Hassan Heidarian David R. Lentz Saeed Alirezaei Christopher R. M. McFarlane Sima Peighambari Multiple Stage Ore Formation in the Chadormalu Iron Deposit, Bafq Metallogenic Province, Central Iran: Evidence from BSE Imaging and Apatite EPMA and LA-ICP-MS U-Pb Geochronology |
topic_facet |
Chadormalu Kiruna-type iron oxide-apatite U-Pb geochronology Bafq Iran |
description |
The Chadormalu magnetite-apatite deposit in Bafq metallogenic province, Central Iran, is hosted in the late Precambrian-lower Cambrian volcano-sedimentary rocks with sodic, calcic, and potassic alterations characteristic of iron oxide copper-gold (IOCG) and iron oxide-apatite (IOA) ore systems. Apatite occurs as scattered irregular veinlets and disseminated grains, respectively, within and in the marginal parts of the main ore-body, as well as apatite-magnetite veins in altered wall rocks. Textural evidence (SEM-BSE images) of these apatites shows primary bright, and secondary dark areas with inclusions of monazite/xenotime. The primary, monazite-free fluorapatite contains higher concentrations of Na, Si, S, and light rare earth elements (LREE). The apatite was altered by hydrothermal events that led to leaching of Na, Si, and REE + Y, and development of the dark apatite. The bright apatite yielded two U-Pb age populations, an older dominant age of 490 ± 21 Ma, similar to other iron deposits in the Bafq district and associated intrusions, and a younger age of 246 ± 17 Ma. The dark apatite yielded a U-Pb age of 437 ± 12 Ma. Our data suggest that hydrothermal magmatic fluids contributed to formation of the primary fluorapatite, and sodic and calcic alterations. The primary apatite reequilibrated with basinal brines in at least two regional extensions and basin developments in Silurian and Triassic in Central Iran. |
format |
Text |
author |
Hassan Heidarian David R. Lentz Saeed Alirezaei Christopher R. M. McFarlane Sima Peighambari |
author_facet |
Hassan Heidarian David R. Lentz Saeed Alirezaei Christopher R. M. McFarlane Sima Peighambari |
author_sort |
Hassan Heidarian |
title |
Multiple Stage Ore Formation in the Chadormalu Iron Deposit, Bafq Metallogenic Province, Central Iran: Evidence from BSE Imaging and Apatite EPMA and LA-ICP-MS U-Pb Geochronology |
title_short |
Multiple Stage Ore Formation in the Chadormalu Iron Deposit, Bafq Metallogenic Province, Central Iran: Evidence from BSE Imaging and Apatite EPMA and LA-ICP-MS U-Pb Geochronology |
title_full |
Multiple Stage Ore Formation in the Chadormalu Iron Deposit, Bafq Metallogenic Province, Central Iran: Evidence from BSE Imaging and Apatite EPMA and LA-ICP-MS U-Pb Geochronology |
title_fullStr |
Multiple Stage Ore Formation in the Chadormalu Iron Deposit, Bafq Metallogenic Province, Central Iran: Evidence from BSE Imaging and Apatite EPMA and LA-ICP-MS U-Pb Geochronology |
title_full_unstemmed |
Multiple Stage Ore Formation in the Chadormalu Iron Deposit, Bafq Metallogenic Province, Central Iran: Evidence from BSE Imaging and Apatite EPMA and LA-ICP-MS U-Pb Geochronology |
title_sort |
multiple stage ore formation in the chadormalu iron deposit, bafq metallogenic province, central iran: evidence from bse imaging and apatite epma and la-icp-ms u-pb geochronology |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2018 |
url |
https://doi.org/10.3390/min8030087 |
op_coverage |
agris |
long_lat |
ENVELOPE(-129.312,-129.312,52.728,52.728) |
geographic |
Kiruna Wall Rocks |
geographic_facet |
Kiruna Wall Rocks |
genre |
Kiruna |
genre_facet |
Kiruna |
op_source |
Minerals; Volume 8; Issue 3; Pages: 87 |
op_relation |
https://dx.doi.org/10.3390/min8030087 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/min8030087 |
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Minerals |
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8 |
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87 |
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