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dc.contributor.authorAndersson, Stefan S.
dc.contributor.authorSahlström, Fredrik
dc.contributor.authorJonsson, Erik
dc.contributor.authorLuth, Stefan
dc.contributor.authorLynch, Edward P.
dc.contributor.authorHögdahl, Karin
dc.contributor.authorZack, Thomas
dc.contributor.authorGies, Nils
dc.contributor.authorSädbom, Stefan
dc.contributor.authorAlexander Hansson, K.S.
dc.contributor.authorBergqvist, Mikael
dc.date.accessioned2022-03-21T12:54:21Z
dc.date.available2022-03-21T12:54:21Z
dc.date.issued2021-11-29
dc.description.abstractThis study encompasses the ore mineralogy, textures and sulphide trace element chemistry of the Palaeoproterozoic Lovisa stratiform Zn-Pb deposit and the stratigraphically underlying Lovisa Fe Formation in the Bergslagen ore province (Sweden). We investigate the relative timing of formation and subsequent modifications of its ores in relation to the c. 1.87–1.80 Ga Svecokarelian orogeny. The Lovisa Zn-Pb deposit consists of several different ore types. The massive sphalerite-galena ore is distinctly deformed, exhibiting a multiple-scale “ball ore” texture with rounded silicate clasts within a deformed, fine-grained sulphide matrix. Underlying the massive ore is a locally folded, sphalerite-rich laminated ore, interpreted to represent a metamorphosed relict primary lamination. Several generations of sphalerite-galena fracture fillings and veins occur adjacent to the main ore zones and they cross-cut early ductile structures and metamorphic features. The trace element signatures of the sphalerite-galena infillings generally mimic those of the two main ore zones, thus supporting an origin by localised remobilisation of the primary sulphide ore and demonstrating limited trace element redistribution during this process. In contrast, discrete sulphosalt-rich fracture fillings cross-cutting earlier galena-chalcopyrite-rich fracture fillings and veinlets in the Lovisa Fe Formation suggest a significant but still relatively localised redistribution of metals. Trace element mapping of sulphides from the Lovisa Zn-Pb deposit reveals that inclusion-free overgrowths on pyrite crystals are locally Co-enriched compared to the cores, which resulted from the redistribution of Co during late metamorphic processes. Combined textural and geochemical evidence suggest that the originally syngenetic exhalative sulphide ore at Lovisa was locally strongly affected by polyphase deformation and remobilisation. This was initiated during the first stage of amphibolite facies grade regional metamorphism and deformation (D<sub>1</sub>, c. 1.87–1.85 Ga) but is mostly evident from the later stages (D<sub>2</sub>) and the evolution to retrograde and brittle conditions (c. 1.83–1.80 Ga and later).en_US
dc.description.sponsorshipEUen_US
dc.identifier.citationAndersson, Sahlström F, Jonsson E, Luth S, Lynch, Högdahl K, Zack T, Gies, Sädbom S, Alexander Hansson, Bergqvist M. Mineral paragenesis and sulphide trace element distribution in the metamorphosed Lovisa Zn-Pb deposit, Bergslagen (Sweden), as revealed by 3D X-ray tomography, ore petrography and LA-ICP-MS analysis. Ore Geology Reviews. 2022;140:1-23en_US
dc.identifier.cristinIDFRIDAID 2010891
dc.identifier.doi10.1016/j.oregeorev.2021.104611
dc.identifier.issn0169-1368
dc.identifier.issn1872-7360
dc.identifier.urihttps://hdl.handle.net/10037/24472
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalOre Geology Reviews
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/H2020/730270/EU/Real-Time Mineral X-Ray Analysis for Efficient and Sustainable Mining/X-MINE/en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2021 The Author(s)en_US
dc.titleMineral paragenesis and sulphide trace element distribution in the metamorphosed Lovisa Zn-Pb deposit, Bergslagen (Sweden), as revealed by 3D X-ray tomography, ore petrography and LA-ICP-MS analysisen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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