Origin of the high-temperature Olserum-Djupedal REE-phosphate mineralisation, SE Sweden : A unique contact metamorphic-hydrothermal system
The Swedish part of the Fennoscandian Shield hosts a variety of rare earth element (REE) deposits, including magmatic to magmatic-hydrothermal types. This paper focuses on the origin of the Olserum-Djupedal REE-phosphate mineralisation located in the sparsely studied Västervik region, SE Sweden. Her...
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/247108 2024-01-07T09:43:13+01:00 Origin of the high-temperature Olserum-Djupedal REE-phosphate mineralisation, SE Sweden : A unique contact metamorphic-hydrothermal system Andersson, Stefan S. Wagner, Thomas Jonsson, Erik Fusswinkel, Tobias Leijd, Magnus Berg, Johan T. Department of Geosciences and Geography 2018-10-05T14:51:01Z 25 application/pdf http://hdl.handle.net/10138/247108 eng eng Elsevier Scientific Publ. Co 10.1016/j.oregeorev.2018.08.018 Andersson , S S , Wagner , T , Jonsson , E , Fusswinkel , T , Leijd , M & Berg , J T 2018 , ' Origin of the high-temperature Olserum-Djupedal REE-phosphate mineralisation, SE Sweden : A unique contact metamorphic-hydrothermal system ' , Ore Geology Reviews , vol. 101 , pp. 740–764 . https://doi.org/10.1016/j.oregeorev.2018.08.018 RIS: urn:BD822423D127D5FDF8F23BE18843E43F ORCID: /0000-0003-3930-440X/work/49162903 85051974981 8543e89c-5380-4ecf-bb37-866f439ab71d http://hdl.handle.net/10138/247108 000448092400040 cc_by openAccess info:eu-repo/semantics/openAccess Olserum Djupedal REE Phosphate Metasomatism Halogen fugacity SOUTHERN SWEDEN GOLD FLUID CHEMISTRY ORE-DEPOSITS U-PB GRANITIC-ROCKS CL-OH RARE-EARTH-ELEMENT KARR ALKALINE COMPLEX GEOCHEMICAL CHARACTERISTICS 1171 Geosciences Article publishedVersion 2018 ftunivhelsihelda 2023-12-14T00:04:03Z The Swedish part of the Fennoscandian Shield hosts a variety of rare earth element (REE) deposits, including magmatic to magmatic-hydrothermal types. This paper focuses on the origin of the Olserum-Djupedal REE-phosphate mineralisation located in the sparsely studied Västervik region, SE Sweden. Here, mineralisation occurs in three main areas, Olserum, Djupedal and Bersummen. Primary hydrothermal REE mineralisation formed at high temperatures (about 600°C), leading to precipitation of monazite-(Ce), xenotime-(Y), fluorapatite and minor (Y,REE,U,Fe)-(Nb,Ta)-oxides in veins and vein zones dominated by biotite, amphibole, magnetite and quartz. The veins are hosted primarily by metasedimentary rocks present close to, or within, the contact aureole of a local 1.8 Ga ferroan alkali feldspar granite pluton, but also occur within in the chemically most primitive granite in the outermost part of that pluton. In the Djupedal area, REE-mineralised metasedimentary bodies are extensively migmatised, with migmatisation post-dating the main stage of mineralisation. In the Olserum and Bersummen areas, the REE-bearing veins are cross-cut by abundant pegmatitic to granitic dykes. The field relationships demonstrate a protracted magmatic evolution of the granitic pluton and a clear spatial and temporal relationship of the REE mineralisation to the granite. The major and trace element chemistry of ore-associated biotite and magnetite support genetic links between all mineralised areas. Biotite mineral chemistry data further demonstrate a distinct chemical trend from metasediment-hosted ore-associated biotite distal to the major contact of the granite to the biotite in the granite-hosted veins. This trend is characterised by a systematic decrease in Mg and Na and a coupled increase in Fe and Ti with proximity to the granite-hosted veins. The halogen compositions of ore-associated biotite indicate elevated contents of HCl and HF in the primary REE mineralising fluid. Calculated log(fHF/fHCl) values in the Olserum area suggest a ... Article in Journal/Newspaper Fennoscandian HELDA – University of Helsinki Open Repository Ore Geology Reviews 101 740 764 |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
Olserum Djupedal REE Phosphate Metasomatism Halogen fugacity SOUTHERN SWEDEN GOLD FLUID CHEMISTRY ORE-DEPOSITS U-PB GRANITIC-ROCKS CL-OH RARE-EARTH-ELEMENT KARR ALKALINE COMPLEX GEOCHEMICAL CHARACTERISTICS 1171 Geosciences |
spellingShingle |
Olserum Djupedal REE Phosphate Metasomatism Halogen fugacity SOUTHERN SWEDEN GOLD FLUID CHEMISTRY ORE-DEPOSITS U-PB GRANITIC-ROCKS CL-OH RARE-EARTH-ELEMENT KARR ALKALINE COMPLEX GEOCHEMICAL CHARACTERISTICS 1171 Geosciences Andersson, Stefan S. Wagner, Thomas Jonsson, Erik Fusswinkel, Tobias Leijd, Magnus Berg, Johan T. Origin of the high-temperature Olserum-Djupedal REE-phosphate mineralisation, SE Sweden : A unique contact metamorphic-hydrothermal system |
topic_facet |
Olserum Djupedal REE Phosphate Metasomatism Halogen fugacity SOUTHERN SWEDEN GOLD FLUID CHEMISTRY ORE-DEPOSITS U-PB GRANITIC-ROCKS CL-OH RARE-EARTH-ELEMENT KARR ALKALINE COMPLEX GEOCHEMICAL CHARACTERISTICS 1171 Geosciences |
description |
The Swedish part of the Fennoscandian Shield hosts a variety of rare earth element (REE) deposits, including magmatic to magmatic-hydrothermal types. This paper focuses on the origin of the Olserum-Djupedal REE-phosphate mineralisation located in the sparsely studied Västervik region, SE Sweden. Here, mineralisation occurs in three main areas, Olserum, Djupedal and Bersummen. Primary hydrothermal REE mineralisation formed at high temperatures (about 600°C), leading to precipitation of monazite-(Ce), xenotime-(Y), fluorapatite and minor (Y,REE,U,Fe)-(Nb,Ta)-oxides in veins and vein zones dominated by biotite, amphibole, magnetite and quartz. The veins are hosted primarily by metasedimentary rocks present close to, or within, the contact aureole of a local 1.8 Ga ferroan alkali feldspar granite pluton, but also occur within in the chemically most primitive granite in the outermost part of that pluton. In the Djupedal area, REE-mineralised metasedimentary bodies are extensively migmatised, with migmatisation post-dating the main stage of mineralisation. In the Olserum and Bersummen areas, the REE-bearing veins are cross-cut by abundant pegmatitic to granitic dykes. The field relationships demonstrate a protracted magmatic evolution of the granitic pluton and a clear spatial and temporal relationship of the REE mineralisation to the granite. The major and trace element chemistry of ore-associated biotite and magnetite support genetic links between all mineralised areas. Biotite mineral chemistry data further demonstrate a distinct chemical trend from metasediment-hosted ore-associated biotite distal to the major contact of the granite to the biotite in the granite-hosted veins. This trend is characterised by a systematic decrease in Mg and Na and a coupled increase in Fe and Ti with proximity to the granite-hosted veins. The halogen compositions of ore-associated biotite indicate elevated contents of HCl and HF in the primary REE mineralising fluid. Calculated log(fHF/fHCl) values in the Olserum area suggest a ... |
author2 |
Department of Geosciences and Geography |
format |
Article in Journal/Newspaper |
author |
Andersson, Stefan S. Wagner, Thomas Jonsson, Erik Fusswinkel, Tobias Leijd, Magnus Berg, Johan T. |
author_facet |
Andersson, Stefan S. Wagner, Thomas Jonsson, Erik Fusswinkel, Tobias Leijd, Magnus Berg, Johan T. |
author_sort |
Andersson, Stefan S. |
title |
Origin of the high-temperature Olserum-Djupedal REE-phosphate mineralisation, SE Sweden : A unique contact metamorphic-hydrothermal system |
title_short |
Origin of the high-temperature Olserum-Djupedal REE-phosphate mineralisation, SE Sweden : A unique contact metamorphic-hydrothermal system |
title_full |
Origin of the high-temperature Olserum-Djupedal REE-phosphate mineralisation, SE Sweden : A unique contact metamorphic-hydrothermal system |
title_fullStr |
Origin of the high-temperature Olserum-Djupedal REE-phosphate mineralisation, SE Sweden : A unique contact metamorphic-hydrothermal system |
title_full_unstemmed |
Origin of the high-temperature Olserum-Djupedal REE-phosphate mineralisation, SE Sweden : A unique contact metamorphic-hydrothermal system |
title_sort |
origin of the high-temperature olserum-djupedal ree-phosphate mineralisation, se sweden : a unique contact metamorphic-hydrothermal system |
publisher |
Elsevier Scientific Publ. Co |
publishDate |
2018 |
url |
http://hdl.handle.net/10138/247108 |
genre |
Fennoscandian |
genre_facet |
Fennoscandian |
op_relation |
10.1016/j.oregeorev.2018.08.018 Andersson , S S , Wagner , T , Jonsson , E , Fusswinkel , T , Leijd , M & Berg , J T 2018 , ' Origin of the high-temperature Olserum-Djupedal REE-phosphate mineralisation, SE Sweden : A unique contact metamorphic-hydrothermal system ' , Ore Geology Reviews , vol. 101 , pp. 740–764 . https://doi.org/10.1016/j.oregeorev.2018.08.018 RIS: urn:BD822423D127D5FDF8F23BE18843E43F ORCID: /0000-0003-3930-440X/work/49162903 85051974981 8543e89c-5380-4ecf-bb37-866f439ab71d http://hdl.handle.net/10138/247108 000448092400040 |
op_rights |
cc_by openAccess info:eu-repo/semantics/openAccess |
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Ore Geology Reviews |
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101 |
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740 |
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764 |
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1787424468362067968 |