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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2018
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ftdoajarticles:oai:doaj.org/article:0e267862776e4274a47047339bc463f6 2023-05-15T17:04:17+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 2018-02-01T00:00:00Z https://doi.org/10.3390/min8030087 https://doaj.org/article/0e267862776e4274a47047339bc463f6 EN eng MDPI AG http://www.mdpi.com/2075-163X/8/3/87 https://doaj.org/toc/2075-163X 2075-163X doi:10.3390/min8030087 https://doaj.org/article/0e267862776e4274a47047339bc463f6 Minerals, Vol 8, Iss 3, p 87 (2018) Chadormalu Kiruna-type iron oxide-apatite U-Pb geochronology Bafq Iran Mineralogy QE351-399.2 article 2018 ftdoajarticles https://doi.org/10.3390/min8030087 2022-12-31T12:21:38Z 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. Article in Journal/Newspaper Kiruna Directory of Open Access Journals: DOAJ Articles Kiruna Wall Rocks ENVELOPE(-129.312,-129.312,52.728,52.728) Minerals 8 3 87 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Chadormalu Kiruna-type iron oxide-apatite U-Pb geochronology Bafq Iran Mineralogy QE351-399.2 |
spellingShingle |
Chadormalu Kiruna-type iron oxide-apatite U-Pb geochronology Bafq Iran Mineralogy QE351-399.2 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 Mineralogy QE351-399.2 |
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 |
Article in Journal/Newspaper |
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 |
MDPI AG |
publishDate |
2018 |
url |
https://doi.org/10.3390/min8030087 https://doaj.org/article/0e267862776e4274a47047339bc463f6 |
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, Vol 8, Iss 3, p 87 (2018) |
op_relation |
http://www.mdpi.com/2075-163X/8/3/87 https://doaj.org/toc/2075-163X 2075-163X doi:10.3390/min8030087 https://doaj.org/article/0e267862776e4274a47047339bc463f6 |
op_doi |
https://doi.org/10.3390/min8030087 |
container_title |
Minerals |
container_volume |
8 |
container_issue |
3 |
container_start_page |
87 |
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1766058354479726592 |