Geology and Age Constraints on the Origin of the Intrusion-Related, Sheeted Vein-Type Åkerberg Gold Deposit, Skellefte District, Sweden
The Early Proterozoic (~1.9 Ga) Skellefte mining district in northern Sweden hosts abundant base metal deposits, but there are also gold-only deposits. The Åkerberg gold ore is unusual given the noted lack of alteration, a scarcity of sulfides and gold associated with thin (mm-cm wide) parallel quar...
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ftdoajarticles:oai:doaj.org/article:ef7c7257666b44a790d398a9cd6dfefe 2024-10-20T14:10:55+00:00 Geology and Age Constraints on the Origin of the Intrusion-Related, Sheeted Vein-Type Åkerberg Gold Deposit, Skellefte District, Sweden Kjell Billström Ulf Söderlund Hans Årebäck Benny Mattson Curt Broman 2012-10-01T00:00:00Z https://doi.org/10.3390/min2040385 https://doaj.org/article/ef7c7257666b44a790d398a9cd6dfefe EN eng MDPI AG http://www.mdpi.com/2075-163X/2/4/385 https://doaj.org/toc/2075-163X doi:10.3390/min2040385 https://doaj.org/article/ef7c7257666b44a790d398a9cd6dfefe Minerals, Vol 2, Iss 4, Pp 385-416 (2012) Skellefte district gold ore sheeted vein complex U-Pb dating fluid inclusions intrusion-related style Mineralogy QE351-399.2 article 2012 ftdoajarticles https://doi.org/10.3390/min2040385 2024-09-25T15:39:09Z The Early Proterozoic (~1.9 Ga) Skellefte mining district in northern Sweden hosts abundant base metal deposits, but there are also gold-only deposits. The Åkerberg gold ore is unusual given the noted lack of alteration, a scarcity of sulfides and gold associated with thin (mm-cm wide) parallel quartz veins hosted in a gabbro. The gold content is positively correlated with the density of quartz veins, but gold often occurs between veins and also in parts of the gabbro where there is no veining. The gabbro is intruded by a granodiorite and associated pegmatite bodies, and U-Pb dating of zircon and baddeleyite suggest that these lithologies developed close in time at around 1.88 Ga ago. There are no primary inclusions in quartz veins, but different types of secondary aqueous inclusions occur. The Åkerberg ore is interpreted as a sheeted vein complex, with veins constrained to tensional cracks induced when a granodioritic magma intruded the competent, sheet-like gabbro intrusion. It is suggested that unmixing of the felsic magma also produced pegmatite bodies and a gel-like melt which invaded fractures in the gabbro and deposited silica. In a comparison, the Åkerberg ore shares many characteristics with the intrusion-related style of gold mineralizations. Article in Journal/Newspaper Northern Sweden Directory of Open Access Journals: DOAJ Articles Åkerberg ENVELOPE(22.350,22.350,66.083,66.083) Minerals 2 4 385 416 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Skellefte district gold ore sheeted vein complex U-Pb dating fluid inclusions intrusion-related style Mineralogy QE351-399.2 |
spellingShingle |
Skellefte district gold ore sheeted vein complex U-Pb dating fluid inclusions intrusion-related style Mineralogy QE351-399.2 Kjell Billström Ulf Söderlund Hans Årebäck Benny Mattson Curt Broman Geology and Age Constraints on the Origin of the Intrusion-Related, Sheeted Vein-Type Åkerberg Gold Deposit, Skellefte District, Sweden |
topic_facet |
Skellefte district gold ore sheeted vein complex U-Pb dating fluid inclusions intrusion-related style Mineralogy QE351-399.2 |
description |
The Early Proterozoic (~1.9 Ga) Skellefte mining district in northern Sweden hosts abundant base metal deposits, but there are also gold-only deposits. The Åkerberg gold ore is unusual given the noted lack of alteration, a scarcity of sulfides and gold associated with thin (mm-cm wide) parallel quartz veins hosted in a gabbro. The gold content is positively correlated with the density of quartz veins, but gold often occurs between veins and also in parts of the gabbro where there is no veining. The gabbro is intruded by a granodiorite and associated pegmatite bodies, and U-Pb dating of zircon and baddeleyite suggest that these lithologies developed close in time at around 1.88 Ga ago. There are no primary inclusions in quartz veins, but different types of secondary aqueous inclusions occur. The Åkerberg ore is interpreted as a sheeted vein complex, with veins constrained to tensional cracks induced when a granodioritic magma intruded the competent, sheet-like gabbro intrusion. It is suggested that unmixing of the felsic magma also produced pegmatite bodies and a gel-like melt which invaded fractures in the gabbro and deposited silica. In a comparison, the Åkerberg ore shares many characteristics with the intrusion-related style of gold mineralizations. |
format |
Article in Journal/Newspaper |
author |
Kjell Billström Ulf Söderlund Hans Årebäck Benny Mattson Curt Broman |
author_facet |
Kjell Billström Ulf Söderlund Hans Årebäck Benny Mattson Curt Broman |
author_sort |
Kjell Billström |
title |
Geology and Age Constraints on the Origin of the Intrusion-Related, Sheeted Vein-Type Åkerberg Gold Deposit, Skellefte District, Sweden |
title_short |
Geology and Age Constraints on the Origin of the Intrusion-Related, Sheeted Vein-Type Åkerberg Gold Deposit, Skellefte District, Sweden |
title_full |
Geology and Age Constraints on the Origin of the Intrusion-Related, Sheeted Vein-Type Åkerberg Gold Deposit, Skellefte District, Sweden |
title_fullStr |
Geology and Age Constraints on the Origin of the Intrusion-Related, Sheeted Vein-Type Åkerberg Gold Deposit, Skellefte District, Sweden |
title_full_unstemmed |
Geology and Age Constraints on the Origin of the Intrusion-Related, Sheeted Vein-Type Åkerberg Gold Deposit, Skellefte District, Sweden |
title_sort |
geology and age constraints on the origin of the intrusion-related, sheeted vein-type åkerberg gold deposit, skellefte district, sweden |
publisher |
MDPI AG |
publishDate |
2012 |
url |
https://doi.org/10.3390/min2040385 https://doaj.org/article/ef7c7257666b44a790d398a9cd6dfefe |
long_lat |
ENVELOPE(22.350,22.350,66.083,66.083) |
geographic |
Åkerberg |
geographic_facet |
Åkerberg |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_source |
Minerals, Vol 2, Iss 4, Pp 385-416 (2012) |
op_relation |
http://www.mdpi.com/2075-163X/2/4/385 https://doaj.org/toc/2075-163X doi:10.3390/min2040385 https://doaj.org/article/ef7c7257666b44a790d398a9cd6dfefe |
op_doi |
https://doi.org/10.3390/min2040385 |
container_title |
Minerals |
container_volume |
2 |
container_issue |
4 |
container_start_page |
385 |
op_container_end_page |
416 |
_version_ |
1813450980829691904 |