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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ftmdpi:oai:mdpi.com:/2075-163X/2/4/385/ 2023-08-20T04:08:47+02:00 Geology and Age Constraints on the Origin of the Intrusion-Related, Sheeted Vein-Type Åkerberg Gold Deposit, Skellefte District, Sweden Kjell Billström Benny Mattson Ulf Söderlund Hans Årebäck Curt Broman agris 2012-10-31 application/pdf https://doi.org/10.3390/min2040385 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/min2040385 https://creativecommons.org/licenses/by/3.0/ Minerals; Volume 2; Issue 4; Pages: 385-416 Skellefte district gold ore sheeted vein complex U-Pb dating fluid inclusions intrusion-related style Text 2012 ftmdpi https://doi.org/10.3390/min2040385 2023-07-31T20:30:29Z 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. Text Northern Sweden MDPI Open Access Publishing Åkerberg ENVELOPE(22.350,22.350,66.083,66.083) Minerals 2 4 385 416 |
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MDPI Open Access Publishing |
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ftmdpi |
language |
English |
topic |
Skellefte district gold ore sheeted vein complex U-Pb dating fluid inclusions intrusion-related style |
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Skellefte district gold ore sheeted vein complex U-Pb dating fluid inclusions intrusion-related style Kjell Billström Benny Mattson Ulf Söderlund Hans Årebäck 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 |
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 |
Text |
author |
Kjell Billström Benny Mattson Ulf Söderlund Hans Årebäck Curt Broman |
author_facet |
Kjell Billström Benny Mattson Ulf Söderlund Hans Årebäck 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 |
Multidisciplinary Digital Publishing Institute |
publishDate |
2012 |
url |
https://doi.org/10.3390/min2040385 |
op_coverage |
agris |
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; Volume 2; Issue 4; Pages: 385-416 |
op_relation |
https://dx.doi.org/10.3390/min2040385 |
op_rights |
https://creativecommons.org/licenses/by/3.0/ |
op_doi |
https://doi.org/10.3390/min2040385 |
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Minerals |
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2 |
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4 |
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385 |
op_container_end_page |
416 |
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1774721262686306304 |