A succession of near-orthogonal horizontal tectonic shortenings in the Paleoproterozoic Central Lapland Greenstone Belt of Fennoscandia: constraints from the world-class Suurikuusikko gold deposit
Abstract The relative and absolute timing of orogenic gold deposits in complex structural settings are active and challenging topics of research, especially in Precambrian greenstone belts. The Suurikuusikko gold deposit in Central Lapland Greenstone Belt is currently the largest primary gold produc...
Published in: | Mineralium Deposita |
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Springer Science and Business Media LLC
2019
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Online Access: | http://dx.doi.org/10.1007/s00126-019-00910-7 http://link.springer.com/content/pdf/10.1007/s00126-019-00910-7.pdf http://link.springer.com/article/10.1007/s00126-019-00910-7/fulltext.html |
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crspringernat:10.1007/s00126-019-00910-7 2023-05-15T16:12:11+02:00 A succession of near-orthogonal horizontal tectonic shortenings in the Paleoproterozoic Central Lapland Greenstone Belt of Fennoscandia: constraints from the world-class Suurikuusikko gold deposit Sayab, M. Molnár, F. Aerden, D. Niiranen, T. Kuva, J. Välimaa, J. Geological Survey of Finland 2019 http://dx.doi.org/10.1007/s00126-019-00910-7 http://link.springer.com/content/pdf/10.1007/s00126-019-00910-7.pdf http://link.springer.com/article/10.1007/s00126-019-00910-7/fulltext.html en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Mineralium Deposita volume 55, issue 8, page 1605-1624 ISSN 0026-4598 1432-1866 Geochemistry and Petrology Geophysics Economic Geology journal-article 2019 crspringernat https://doi.org/10.1007/s00126-019-00910-7 2022-01-04T15:45:07Z Abstract The relative and absolute timing of orogenic gold deposits in complex structural settings are active and challenging topics of research, especially in Precambrian greenstone belts. The Suurikuusikko gold deposit in Central Lapland Greenstone Belt is currently the largest primary gold producing deposit in Europe, located on a slight bend of the strike-slip Kiistala shear zone (KiSZ). Gold is refractory and locked inside arsenopyrite and pyrite. In this study, different structural features were investigated along the KiSZ from the recently stripped Etelä pit, which is the southern extension of the Suurikuusikko ore body. Our data source ranges from aeromagnetic to high-resolution aerial images, X-ray computed tomography scans of selected rock samples and regional geological and geophysical datasets. The KiSZ has recorded five discrete deformation phases, spanning between ca. 1.92 and 1.76 Ga. The refractory gold at the Suurikuusikko deposit formed during E-W contraction related to the D1 thrusting phase. This was followed by a N-S shortening event (D2), where most of the strain was taken up by the northern and southern thrusts. Tectonic vectors then switched from N-S to NE-SW and, as a result, dextral strike-slip regime (D3) commenced along the KiSZ. This event exsolved invisible gold from the sulfides and remobilized it along with fractures. A near-orthogonal switch of the regional stress regime from NE-SW to NW-SE flipped the kinematics of the KiSZ from dextral to sinistral (D4). The last deformation phase (D5) produced widespread veining under E-W contraction and secured gold mineralization at the Iso-Kuotko gold deposit within the KiSZ. Article in Journal/Newspaper Fennoscandia Lapland Springer Nature (via Crossref) Kiistala ENVELOPE(25.336,25.336,67.871,67.871) Mineralium Deposita 55 8 1605 1624 |
institution |
Open Polar |
collection |
Springer Nature (via Crossref) |
op_collection_id |
crspringernat |
language |
English |
topic |
Geochemistry and Petrology Geophysics Economic Geology |
spellingShingle |
Geochemistry and Petrology Geophysics Economic Geology Sayab, M. Molnár, F. Aerden, D. Niiranen, T. Kuva, J. Välimaa, J. A succession of near-orthogonal horizontal tectonic shortenings in the Paleoproterozoic Central Lapland Greenstone Belt of Fennoscandia: constraints from the world-class Suurikuusikko gold deposit |
topic_facet |
Geochemistry and Petrology Geophysics Economic Geology |
description |
Abstract The relative and absolute timing of orogenic gold deposits in complex structural settings are active and challenging topics of research, especially in Precambrian greenstone belts. The Suurikuusikko gold deposit in Central Lapland Greenstone Belt is currently the largest primary gold producing deposit in Europe, located on a slight bend of the strike-slip Kiistala shear zone (KiSZ). Gold is refractory and locked inside arsenopyrite and pyrite. In this study, different structural features were investigated along the KiSZ from the recently stripped Etelä pit, which is the southern extension of the Suurikuusikko ore body. Our data source ranges from aeromagnetic to high-resolution aerial images, X-ray computed tomography scans of selected rock samples and regional geological and geophysical datasets. The KiSZ has recorded five discrete deformation phases, spanning between ca. 1.92 and 1.76 Ga. The refractory gold at the Suurikuusikko deposit formed during E-W contraction related to the D1 thrusting phase. This was followed by a N-S shortening event (D2), where most of the strain was taken up by the northern and southern thrusts. Tectonic vectors then switched from N-S to NE-SW and, as a result, dextral strike-slip regime (D3) commenced along the KiSZ. This event exsolved invisible gold from the sulfides and remobilized it along with fractures. A near-orthogonal switch of the regional stress regime from NE-SW to NW-SE flipped the kinematics of the KiSZ from dextral to sinistral (D4). The last deformation phase (D5) produced widespread veining under E-W contraction and secured gold mineralization at the Iso-Kuotko gold deposit within the KiSZ. |
author2 |
Geological Survey of Finland |
format |
Article in Journal/Newspaper |
author |
Sayab, M. Molnár, F. Aerden, D. Niiranen, T. Kuva, J. Välimaa, J. |
author_facet |
Sayab, M. Molnár, F. Aerden, D. Niiranen, T. Kuva, J. Välimaa, J. |
author_sort |
Sayab, M. |
title |
A succession of near-orthogonal horizontal tectonic shortenings in the Paleoproterozoic Central Lapland Greenstone Belt of Fennoscandia: constraints from the world-class Suurikuusikko gold deposit |
title_short |
A succession of near-orthogonal horizontal tectonic shortenings in the Paleoproterozoic Central Lapland Greenstone Belt of Fennoscandia: constraints from the world-class Suurikuusikko gold deposit |
title_full |
A succession of near-orthogonal horizontal tectonic shortenings in the Paleoproterozoic Central Lapland Greenstone Belt of Fennoscandia: constraints from the world-class Suurikuusikko gold deposit |
title_fullStr |
A succession of near-orthogonal horizontal tectonic shortenings in the Paleoproterozoic Central Lapland Greenstone Belt of Fennoscandia: constraints from the world-class Suurikuusikko gold deposit |
title_full_unstemmed |
A succession of near-orthogonal horizontal tectonic shortenings in the Paleoproterozoic Central Lapland Greenstone Belt of Fennoscandia: constraints from the world-class Suurikuusikko gold deposit |
title_sort |
succession of near-orthogonal horizontal tectonic shortenings in the paleoproterozoic central lapland greenstone belt of fennoscandia: constraints from the world-class suurikuusikko gold deposit |
publisher |
Springer Science and Business Media LLC |
publishDate |
2019 |
url |
http://dx.doi.org/10.1007/s00126-019-00910-7 http://link.springer.com/content/pdf/10.1007/s00126-019-00910-7.pdf http://link.springer.com/article/10.1007/s00126-019-00910-7/fulltext.html |
long_lat |
ENVELOPE(25.336,25.336,67.871,67.871) |
geographic |
Kiistala |
geographic_facet |
Kiistala |
genre |
Fennoscandia Lapland |
genre_facet |
Fennoscandia Lapland |
op_source |
Mineralium Deposita volume 55, issue 8, page 1605-1624 ISSN 0026-4598 1432-1866 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1007/s00126-019-00910-7 |
container_title |
Mineralium Deposita |
container_volume |
55 |
container_issue |
8 |
container_start_page |
1605 |
op_container_end_page |
1624 |
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1765997433930645504 |