On the origin of the Fäboliden orogenic gold deposit, northern Sweden
A new promising ore province, the Gold Line, southwest of the well- known Skellefte District, northern Sweden, is currently under exploration. This province hosts, so far, one operating mine, the Svartliden Au mine, and the recently closed Blaiken Zn-Pb-Au-Ag mine. The largest known gold deposit, th...
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Luleå tekniska universitet, Geovetenskap och miljöteknik
2008
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ftluleatu:oai:DiVA.org:ltu-17548 2023-05-15T17:44:32+02:00 On the origin of the Fäboliden orogenic gold deposit, northern Sweden Bark, Glenn 2008 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-17548 eng eng Luleå tekniska universitet, Geovetenskap och miljöteknik Luleå Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, 1402-1544 2008:72 http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-17548 Local 3e73a150-bd33-11dd-a7c4-000ea68e967b info:eu-repo/semantics/openAccess Geology Geologi Doctoral thesis, comprehensive summary info:eu-repo/semantics/doctoralThesis text 2008 ftluleatu 2022-10-25T20:53:51Z A new promising ore province, the Gold Line, southwest of the well- known Skellefte District, northern Sweden, is currently under exploration. This province hosts, so far, one operating mine, the Svartliden Au mine, and the recently closed Blaiken Zn-Pb-Au-Ag mine. The largest known gold deposit, the hypozonal Fäboliden orogenic gold deposit, in the area was recently granted mining permits. The deposit holds c. 54 Mt at 1.2 g/t Au, with a planned production of 4.6 Mt of ore/year. The mineralization at Fäboliden is commonly hosted in arsenopyrite-bearing quartz-veins, within a roughly N-S striking, steeply dipping shear zone in amphibolite facies volcano- sedimentary host rocks. The narrow belt of supracrustal rocks is surrounded by late- to post-orogenic Revsund granite. The gold is fine-grained (2-40 µm) and closely associated with arsenopyrite- löllingite and stibnite. Gold is found in fractures and as inclusions in the arsenopyrite-löllingite. Gold is also seen as free grains in the silicate matrix of the host rock. The hydrothermal mineral assemblage in the proximal alteration zone is diopside, calcic amphibole, biotite, and minor andalusite and tourmaline. This type of assemblage is commonly recognized in hypozonal orogenic gold deposits worldwide. The lateral extent of the proximal alteration zone is estimated to 30-50 meters, and there is a good agreement between diopside- amphibole-biotite alteration, quartz veining, and gold mineralization. The mineral assemblage in the distal alteration zone is characterised by the presence of Ca- and Fe-Mg amphiboles, hedenbergite, biotite, and quartz. The transition from the distal alteration into the regional metamorphic assemblage is diffuse, and the only discernable feature appears to be a gradual decrease of amphibole away from the mineralization. The ductile gold-hosting fabric progresses laterally across the Revsund granite contact and then disappears after a few meters inside the granite, suggesting that at least the final stages of mineralization syn- to ... Doctoral or Postdoctoral Thesis Northern Sweden Luleå University of Technology Publications (DiVA) Svartliden ENVELOPE(20.400,20.400,65.633,65.633) |
institution |
Open Polar |
collection |
Luleå University of Technology Publications (DiVA) |
op_collection_id |
ftluleatu |
language |
English |
topic |
Geology Geologi |
spellingShingle |
Geology Geologi Bark, Glenn On the origin of the Fäboliden orogenic gold deposit, northern Sweden |
topic_facet |
Geology Geologi |
description |
A new promising ore province, the Gold Line, southwest of the well- known Skellefte District, northern Sweden, is currently under exploration. This province hosts, so far, one operating mine, the Svartliden Au mine, and the recently closed Blaiken Zn-Pb-Au-Ag mine. The largest known gold deposit, the hypozonal Fäboliden orogenic gold deposit, in the area was recently granted mining permits. The deposit holds c. 54 Mt at 1.2 g/t Au, with a planned production of 4.6 Mt of ore/year. The mineralization at Fäboliden is commonly hosted in arsenopyrite-bearing quartz-veins, within a roughly N-S striking, steeply dipping shear zone in amphibolite facies volcano- sedimentary host rocks. The narrow belt of supracrustal rocks is surrounded by late- to post-orogenic Revsund granite. The gold is fine-grained (2-40 µm) and closely associated with arsenopyrite- löllingite and stibnite. Gold is found in fractures and as inclusions in the arsenopyrite-löllingite. Gold is also seen as free grains in the silicate matrix of the host rock. The hydrothermal mineral assemblage in the proximal alteration zone is diopside, calcic amphibole, biotite, and minor andalusite and tourmaline. This type of assemblage is commonly recognized in hypozonal orogenic gold deposits worldwide. The lateral extent of the proximal alteration zone is estimated to 30-50 meters, and there is a good agreement between diopside- amphibole-biotite alteration, quartz veining, and gold mineralization. The mineral assemblage in the distal alteration zone is characterised by the presence of Ca- and Fe-Mg amphiboles, hedenbergite, biotite, and quartz. The transition from the distal alteration into the regional metamorphic assemblage is diffuse, and the only discernable feature appears to be a gradual decrease of amphibole away from the mineralization. The ductile gold-hosting fabric progresses laterally across the Revsund granite contact and then disappears after a few meters inside the granite, suggesting that at least the final stages of mineralization syn- to ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Bark, Glenn |
author_facet |
Bark, Glenn |
author_sort |
Bark, Glenn |
title |
On the origin of the Fäboliden orogenic gold deposit, northern Sweden |
title_short |
On the origin of the Fäboliden orogenic gold deposit, northern Sweden |
title_full |
On the origin of the Fäboliden orogenic gold deposit, northern Sweden |
title_fullStr |
On the origin of the Fäboliden orogenic gold deposit, northern Sweden |
title_full_unstemmed |
On the origin of the Fäboliden orogenic gold deposit, northern Sweden |
title_sort |
on the origin of the fäboliden orogenic gold deposit, northern sweden |
publisher |
Luleå tekniska universitet, Geovetenskap och miljöteknik |
publishDate |
2008 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-17548 |
long_lat |
ENVELOPE(20.400,20.400,65.633,65.633) |
geographic |
Svartliden |
geographic_facet |
Svartliden |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_relation |
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, 1402-1544 2008:72 http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-17548 Local 3e73a150-bd33-11dd-a7c4-000ea68e967b |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766146768857202688 |