Geology of the Fäbodliden C lode gold deposit in northern Sweden : Implications for Gold Process Mineralogy

The Fäbodliden C lode gold deposit is located in the Vindelgransele area, in the westernmost part of the well-known Skellefte District, bordering to the Gold Line District, in northern Sweden. The geology of the deposit consists of a massive quartz vein hosted by a sequence of turbiditic greywackes...

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Main Author: Fettweis, Réginald
Format: Bachelor Thesis
Language:English
Published: 2015
Subjects:
Online Access:http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-58250
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spelling ftluleatu:oai:DiVA.org:ltu-58250 2023-05-15T17:44:23+02:00 Geology of the Fäbodliden C lode gold deposit in northern Sweden : Implications for Gold Process Mineralogy Fettweis, Réginald 2015 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-58250 eng eng http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-58250 Local ed3b9e5c-db47-4458-9d1b-bc19d7dd4567 info:eu-repo/semantics/openAccess Technology Fäbodliden C Northern Sweden Gold Geology Geochemistry Hydrothermal alteration Process mineralogy Teknik Student thesis info:eu-repo/semantics/bachelorThesis text 2015 ftluleatu 2022-10-25T20:52:54Z The Fäbodliden C lode gold deposit is located in the Vindelgransele area, in the westernmost part of the well-known Skellefte District, bordering to the Gold Line District, in northern Sweden. The geology of the deposit consists of a massive quartz vein hosted by a sequence of turbiditic greywackes and pelitic sediments and situated some 20 to 30 meters above the contact to an elongated granodioritic sill. All rocks have been affected to various extents by the regional metamorphism into greenschist facies. The quartz vein is rich in Au and Ag but also shows high concentrations in Zn, As, Cu and Pb. The granodiorite is intermediate, oversaturated with respect to silica and peraluminous, has a subalkaline magmatic affinity and shows volcanic arc settings. The hydrothermal alteration is characterized by strong sericitization and chloritization enveloping the mineralized quartz vein with no obvious defined lateral zonation. Gold is mainly hosted by the quartz vein but some is disseminated in the granodiorite. Gold-containing minerals are dominantly electrum which exhibits a median purity of 770 fine. The grain size ranges from coarse- grained to very fine-grained. Gold is commonly associated with sulphides, including at grain boundary to- or as inclusion in arsenopyrite, pyrite, pyrrhotite, chalcopyrite, galena and sphalerite. Arsenic, Sb, Bi and Ag are significantly correlated to Au. Gold being mainly quartz vein-hosted, the mineralization should be relatively easy to treat during mineral processing. Over 90 % of gold should be recovered using gravity separation followed be a direct cyanide leaching. Some deleterious mineralogical factors (e.g. gold-containing mineralogy, gold grain size and sulphide association) could however affect the efficiency of the recovery process. According to the geology, the chemical and mineralogical characteristics of the rocks and the hydrothermal alteration, genetically, the deposit should be classified as an orogenic gold deposit, in the sense of Groves et al. (1998), even though ... Bachelor Thesis Northern Sweden Luleå University of Technology Publications (DiVA)
institution Open Polar
collection Luleå University of Technology Publications (DiVA)
op_collection_id ftluleatu
language English
topic Technology
Fäbodliden C
Northern Sweden
Gold
Geology
Geochemistry
Hydrothermal alteration
Process mineralogy
Teknik
spellingShingle Technology
Fäbodliden C
Northern Sweden
Gold
Geology
Geochemistry
Hydrothermal alteration
Process mineralogy
Teknik
Fettweis, Réginald
Geology of the Fäbodliden C lode gold deposit in northern Sweden : Implications for Gold Process Mineralogy
topic_facet Technology
Fäbodliden C
Northern Sweden
Gold
Geology
Geochemistry
Hydrothermal alteration
Process mineralogy
Teknik
description The Fäbodliden C lode gold deposit is located in the Vindelgransele area, in the westernmost part of the well-known Skellefte District, bordering to the Gold Line District, in northern Sweden. The geology of the deposit consists of a massive quartz vein hosted by a sequence of turbiditic greywackes and pelitic sediments and situated some 20 to 30 meters above the contact to an elongated granodioritic sill. All rocks have been affected to various extents by the regional metamorphism into greenschist facies. The quartz vein is rich in Au and Ag but also shows high concentrations in Zn, As, Cu and Pb. The granodiorite is intermediate, oversaturated with respect to silica and peraluminous, has a subalkaline magmatic affinity and shows volcanic arc settings. The hydrothermal alteration is characterized by strong sericitization and chloritization enveloping the mineralized quartz vein with no obvious defined lateral zonation. Gold is mainly hosted by the quartz vein but some is disseminated in the granodiorite. Gold-containing minerals are dominantly electrum which exhibits a median purity of 770 fine. The grain size ranges from coarse- grained to very fine-grained. Gold is commonly associated with sulphides, including at grain boundary to- or as inclusion in arsenopyrite, pyrite, pyrrhotite, chalcopyrite, galena and sphalerite. Arsenic, Sb, Bi and Ag are significantly correlated to Au. Gold being mainly quartz vein-hosted, the mineralization should be relatively easy to treat during mineral processing. Over 90 % of gold should be recovered using gravity separation followed be a direct cyanide leaching. Some deleterious mineralogical factors (e.g. gold-containing mineralogy, gold grain size and sulphide association) could however affect the efficiency of the recovery process. According to the geology, the chemical and mineralogical characteristics of the rocks and the hydrothermal alteration, genetically, the deposit should be classified as an orogenic gold deposit, in the sense of Groves et al. (1998), even though ...
format Bachelor Thesis
author Fettweis, Réginald
author_facet Fettweis, Réginald
author_sort Fettweis, Réginald
title Geology of the Fäbodliden C lode gold deposit in northern Sweden : Implications for Gold Process Mineralogy
title_short Geology of the Fäbodliden C lode gold deposit in northern Sweden : Implications for Gold Process Mineralogy
title_full Geology of the Fäbodliden C lode gold deposit in northern Sweden : Implications for Gold Process Mineralogy
title_fullStr Geology of the Fäbodliden C lode gold deposit in northern Sweden : Implications for Gold Process Mineralogy
title_full_unstemmed Geology of the Fäbodliden C lode gold deposit in northern Sweden : Implications for Gold Process Mineralogy
title_sort geology of the fäbodliden c lode gold deposit in northern sweden : implications for gold process mineralogy
publishDate 2015
url http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-58250
genre Northern Sweden
genre_facet Northern Sweden
op_relation http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-58250
Local ed3b9e5c-db47-4458-9d1b-bc19d7dd4567
op_rights info:eu-repo/semantics/openAccess
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