Ore mineralogy and trace element (re)distribution at the metamorphosed Lappberget Zn-Pb-Ag-(Cu-Au) deposit, Garpenberg, Sweden

Tiu, G., Jansson, N., Wanhainen, C. , Ghorbani, Y. and Lilja, L. (2021) Ore mineralogy and trace element (re)distribution at the metamorphosed Lappberget Zn-Pb-Ag-(Cu-Au) deposit, Garpenberg, Sweden. Ore Geology Reviews, 135 . p. 104223. ISSN 0169-1368

Full content URL: https://doi.org/10.1016/j.oregeorev.2021.104223

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Item Type:Article
Item Status:Live Archive


Qualitative and quantitative mineralogical and textural investigations were undertaken for the different sulfide minerals in the 1.89 Ga Lappberget deposit, with a focus on sphalerite and pyrite. Three sphalerite types were identified and associated with: (1) main massive sulfide mineralization, (2) Fe-Mn skarn ore, and (3) Ag-rich fissure veins. Sphalerite-1 contained a relatively higher amount of trace elements (Fe, Co, Ge, Cu, Sn, and Au) but is lower in Mn/Fe, Ga, and Hg compared to sphalerite-2. Evidence of tectono-metamorphic modification of sulfides is observed throughout the deposit, such as the formation of growth twins and deformation twins in sulfides, the development of high-angled triple-point junctions in recrystallized pyrite and sphalerite, and the formation of �ball ore� or �durchbewegung� textures within mineralized shear zones. The recrystallization of pyrite and galena may have led to the re-distribution of fluid-mobile elements (As, Cu, Zn, Pb, Ag, and Au), some of which were deposited in discordant Ag-rich fissure veins peripheral to the main massive sulfide lenses. Trace element signatures of sulfides in Lappberget are compatible with the other metamorphosed and deformed, subseafloor volcanogenic carbonate replacement (SVALS)-type deposits in the Bergslagen mining district. © 2021 The Author(s)

Keywords:Binary alloys, Copper alloys, Gold alloys, Gold deposits, Iron alloys, Manganese alloys, Pyrites, Recrystallization (metallurgy), Silver, Silver alloys, Textures, Trace elements, Zinc alloys, Element re, La-ICP-MS, Massive sulfides, Ore mineralogy, Re-distribution, Remobilization, Sphalerite, Sulphide mineralization, gold, massive sulfide, metamorphic rock, mineralogy, ore deposit, Garpenberg, Sweden, Zinc sulfide, trace element, Dalarna, Deposits, copper
Divisions:College of Science
College of Science > School of Chemistry
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ID Code:54505
Deposited On:31 Jul 2023 10:00

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