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Oxide mineralogy and magnetite chemistry of the Malmberget apatite iron ore, Northern Norr
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0002-0935-3430
2013 (English)In: 12th Biennial SGA Meeting: Mineral deposit research for a high-tech world, Uppsala: Geological Society of Sweden , 2013, p. 273-276Conference paper, Published paper (Refereed)
Abstract [en]

The Malmberget deposit has produced morethan 600 Mt of ore and comprises several ore bodies thatexhibit different mineralogical, chemical and structuralfeatures. In the eastern part, the ore bodies occur asmassive lenses of magnetite surrounded by ore breccia,while the western part is characterized by hematitedominated ores. In contrast to most other apatite iron oresin Northern Norrbotten, the Malmberget deposit have beenstrongly affected by deformation, metamorphicrecrystallization and felsic intrusions.Variations in whole rock chemistry of the ores aremainly reflecting primary features with different signaturesfor massive ore and ore breccia, but also indicatingdifferent types of massive ore. Magnetite from ore brecciahave low content of trace elements similar to magnetitefrom IOCG deposits and may have formed byhydrothermal processes while magnetite in massive oreshow chemical characteristics typical for apatite iron ores.The chemistry of magnetite has in various extentsbeen modified due to element redistribution duringmetamorphic recrystallization and oxidation. Mostsignificant is the preferential partition of Ti and to someextent V into porphyroblasts of hematite. The formation ofilmenite and rutile affects the chemistry of magnetite andgives it a lower content of Ti and V and a signatureresembling magnetite from IOCG deposits.

Place, publisher, year, edition, pages
Uppsala: Geological Society of Sweden , 2013. p. 273-276
National Category
Metallurgy and Metallic Materials Geology
Research subject
Process Metallurgy; Ore Geology
Identifiers
URN: urn:nbn:se:ltu:diva-26840Local ID: 0182bb57-23d9-4a33-9619-18b9b770b9acISBN: 978-91-7403-207-9 (print)OAI: oai:DiVA.org:ltu-26840DiVA, id: diva2:1000020
Conference
Biennial SGA Meeting : Mineral deposit research for a high-tech world 12/08/2013 - 15/08/2013
Note
Godkänd; 2013; 20140428 (luncec)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-03-26Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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