Setting of Zn-Cu-Au-Ag massive sulfide deposits in the evolution and facies architecture of a 1.9 Ga marine volcanic arc : Skellefte district, Sweden
Skellefte mining district occurs in an Early Proterozoic, mainly 1.90-1.87 Ga (Svecofennian) magmatic province of low to medium metamorphic grade in the Baltic Shield in northern Sweden. The district contains over 85 pyritic Zn-Cu-Au-Ag massive sulfide deposits and a few vein Au deposits and subecon...
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Language: | English |
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Volcanic Resources Ltd, Stavanger
1996
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Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-2637 https://doi.org/10.2113/gsecongeo.91.6.1022 |
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ftluleatu:oai:DiVA.org:ltu-2637 2023-05-15T17:45:08+02:00 Setting of Zn-Cu-Au-Ag massive sulfide deposits in the evolution and facies architecture of a 1.9 Ga marine volcanic arc : Skellefte district, Sweden Allen, Rodney Weihed, Pär Svensson, S. Å. 1996 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-2637 https://doi.org/10.2113/gsecongeo.91.6.1022 eng eng Volcanic Resources Ltd, Stavanger Geological Survey of Sweden Boliden AB Economic geology and the bulletin of the Society of Economic Geologists, 0361-0128, 1996, 91:6, s. 1022-1053 orcid:0000-0003-3879-3897 http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-2637 doi:10.2113/gsecongeo.91.6.1022 Scopus 2-s2.0-0001019578 Local 04705db0-f49c-11db-ac9f-000ea68e967b info:eu-repo/semantics/openAccess Geology Geologi Article in journal info:eu-repo/semantics/article text 1996 ftluleatu https://doi.org/10.2113/gsecongeo.91.6.1022 2022-11-10T17:10:37Z Skellefte mining district occurs in an Early Proterozoic, mainly 1.90-1.87 Ga (Svecofennian) magmatic province of low to medium metamorphic grade in the Baltic Shield in northern Sweden. The district contains over 85 pyritic Zn-Cu-Au-Ag massive sulfide deposits and a few vein Au deposits and subeconomic porphyry Cu-Au-Mo deposits, The massive sulfide deposits mainly occur within, and especially along the top of: a regional felsic-dominant volcanic unit attributed to a stage of intense, extensional, continental margin are volcanism. From facies analysis we interpret the paleogeography of this stage to have comprised many scattered islands and shallow-water areas. surrounded by deeper seas. All the major massive sulfide ores occur in below-wave base facies associations: however, some ores occur close to stratigraphic intervals of above-wave base facies associations, and the summits of some volcanoes that host massive sulfides emerged above sea level. Intense marine volcanism was superceded at different times in different parts of tile district by a stage of reduced volcanism, uplift resulting in subregional disconformities, and then differential uplift and subsidence resulting in a complex horst and graben paleogeography. Uplift of the are is attributed to the relaxation of crustal extension and the emplacement of granitoids to shallow crustal levels. A few massive sulfide ores formed within the basal strata of this second stage. The horst and graben system was filled by prograding fluvial-deltaic sediments and mainly mafic lavas, and during this stage the Skellefte district was a transitional area between renewed are volcanism of more continental character to the north, and subsidence and basinal mudstone-turbidite sedimentation to the south. This whole volcanotectonic cycle occurred within 10 to 15 m.y. We define 26 main volcanic, sedimentary, and intrusive facies in the Skellefte district. The most abundant facies are (1) normal-graded pumiceous breccias, which are interpreted as syneruptive subaqueous mass ... Article in Journal/Newspaper Northern Sweden Luleå University of Technology Publications (DiVA) Economic Geology 91 6 1022 1053 |
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Luleå University of Technology Publications (DiVA) |
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language |
English |
topic |
Geology Geologi |
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Geology Geologi Allen, Rodney Weihed, Pär Svensson, S. Å. Setting of Zn-Cu-Au-Ag massive sulfide deposits in the evolution and facies architecture of a 1.9 Ga marine volcanic arc : Skellefte district, Sweden |
topic_facet |
Geology Geologi |
description |
Skellefte mining district occurs in an Early Proterozoic, mainly 1.90-1.87 Ga (Svecofennian) magmatic province of low to medium metamorphic grade in the Baltic Shield in northern Sweden. The district contains over 85 pyritic Zn-Cu-Au-Ag massive sulfide deposits and a few vein Au deposits and subeconomic porphyry Cu-Au-Mo deposits, The massive sulfide deposits mainly occur within, and especially along the top of: a regional felsic-dominant volcanic unit attributed to a stage of intense, extensional, continental margin are volcanism. From facies analysis we interpret the paleogeography of this stage to have comprised many scattered islands and shallow-water areas. surrounded by deeper seas. All the major massive sulfide ores occur in below-wave base facies associations: however, some ores occur close to stratigraphic intervals of above-wave base facies associations, and the summits of some volcanoes that host massive sulfides emerged above sea level. Intense marine volcanism was superceded at different times in different parts of tile district by a stage of reduced volcanism, uplift resulting in subregional disconformities, and then differential uplift and subsidence resulting in a complex horst and graben paleogeography. Uplift of the are is attributed to the relaxation of crustal extension and the emplacement of granitoids to shallow crustal levels. A few massive sulfide ores formed within the basal strata of this second stage. The horst and graben system was filled by prograding fluvial-deltaic sediments and mainly mafic lavas, and during this stage the Skellefte district was a transitional area between renewed are volcanism of more continental character to the north, and subsidence and basinal mudstone-turbidite sedimentation to the south. This whole volcanotectonic cycle occurred within 10 to 15 m.y. We define 26 main volcanic, sedimentary, and intrusive facies in the Skellefte district. The most abundant facies are (1) normal-graded pumiceous breccias, which are interpreted as syneruptive subaqueous mass ... |
format |
Article in Journal/Newspaper |
author |
Allen, Rodney Weihed, Pär Svensson, S. Å. |
author_facet |
Allen, Rodney Weihed, Pär Svensson, S. Å. |
author_sort |
Allen, Rodney |
title |
Setting of Zn-Cu-Au-Ag massive sulfide deposits in the evolution and facies architecture of a 1.9 Ga marine volcanic arc : Skellefte district, Sweden |
title_short |
Setting of Zn-Cu-Au-Ag massive sulfide deposits in the evolution and facies architecture of a 1.9 Ga marine volcanic arc : Skellefte district, Sweden |
title_full |
Setting of Zn-Cu-Au-Ag massive sulfide deposits in the evolution and facies architecture of a 1.9 Ga marine volcanic arc : Skellefte district, Sweden |
title_fullStr |
Setting of Zn-Cu-Au-Ag massive sulfide deposits in the evolution and facies architecture of a 1.9 Ga marine volcanic arc : Skellefte district, Sweden |
title_full_unstemmed |
Setting of Zn-Cu-Au-Ag massive sulfide deposits in the evolution and facies architecture of a 1.9 Ga marine volcanic arc : Skellefte district, Sweden |
title_sort |
setting of zn-cu-au-ag massive sulfide deposits in the evolution and facies architecture of a 1.9 ga marine volcanic arc : skellefte district, sweden |
publisher |
Volcanic Resources Ltd, Stavanger |
publishDate |
1996 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-2637 https://doi.org/10.2113/gsecongeo.91.6.1022 |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_relation |
Economic geology and the bulletin of the Society of Economic Geologists, 0361-0128, 1996, 91:6, s. 1022-1053 orcid:0000-0003-3879-3897 http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-2637 doi:10.2113/gsecongeo.91.6.1022 Scopus 2-s2.0-0001019578 Local 04705db0-f49c-11db-ac9f-000ea68e967b |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.2113/gsecongeo.91.6.1022 |
container_title |
Economic Geology |
container_volume |
91 |
container_issue |
6 |
container_start_page |
1022 |
op_container_end_page |
1053 |
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1766147903099764736 |