Building a 3D model of lithological contacts and near‐mine structures in the Kevitsa mining and exploration site, Northern Finland: constraints from 2D and 3D reflection seismic data
ABSTRACT The Kevitsa mafic–ultramafic intrusion in Northern Finland hosts a large, disseminated nickel–copper sulphide ore body. The Kevitsa intrusion is an active mining and exploration site, for which we have built a 3D model of the main lithological contacts and near‐mine structures in the area....
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crwiley:10.1111/1365-2478.12252 2024-06-23T07:55:30+00:00 Building a 3D model of lithological contacts and near‐mine structures in the Kevitsa mining and exploration site, Northern Finland: constraints from 2D and 3D reflection seismic data Koivisto, E. Malehmir, A. Hellqvist, N. Voipio, T. Wijns, C. 2015 http://dx.doi.org/10.1111/1365-2478.12252 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2478.12252 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2478.12252 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Geophysical Prospecting volume 63, issue 4, page 754-773 ISSN 0016-8025 1365-2478 journal-article 2015 crwiley https://doi.org/10.1111/1365-2478.12252 2024-05-31T08:13:56Z ABSTRACT The Kevitsa mafic–ultramafic intrusion in Northern Finland hosts a large, disseminated nickel–copper sulphide ore body. The Kevitsa intrusion is an active mining and exploration site, for which we have built a 3D model of the main lithological contacts and near‐mine structures in the area. To build the 3D model, 2D and 3D reflection seismic data have been used together with borehole data and geological map of the area. The Kevitsa reflection seismic data reveal the internal architecture of the Kevitsa intrusion and the surrounding units. For example, the seismic data have uncovered a previously unknown, deeper continuation of the Kevitsa intrusion. Improved 3D knowledge of the basal contact of the intrusion provides an exploration target for contact‐type mineralization. Within the intrusion, a limited area of strong reflections is observed in the data. This has been associated with discontinuous, smaller‐scale magmatic layering that is thought to control the extent of the Kevitsa main mineralization. Thus, our 3D model of the extents of the internal reflectors can provide a framework for near‐mine and deep exploration of the main type of mineralization in the area. In addition to exploration, the original purpose of the 3D seismic survey was geotechnical planning of the Kevitsa open‐pit mine. Accordingly, the 3D seismic data were used to create a 3D model of the subsurface structures, with a focus on the vicinity of the mine. The interpreted structures reveal a complex pattern of fault and fracture zones, some of which will be important for slope stability and operational planning of the final stages of the mine. Article in Journal/Newspaper Northern Finland Wiley Online Library Geophysical Prospecting 63 4 754 773 |
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English |
description |
ABSTRACT The Kevitsa mafic–ultramafic intrusion in Northern Finland hosts a large, disseminated nickel–copper sulphide ore body. The Kevitsa intrusion is an active mining and exploration site, for which we have built a 3D model of the main lithological contacts and near‐mine structures in the area. To build the 3D model, 2D and 3D reflection seismic data have been used together with borehole data and geological map of the area. The Kevitsa reflection seismic data reveal the internal architecture of the Kevitsa intrusion and the surrounding units. For example, the seismic data have uncovered a previously unknown, deeper continuation of the Kevitsa intrusion. Improved 3D knowledge of the basal contact of the intrusion provides an exploration target for contact‐type mineralization. Within the intrusion, a limited area of strong reflections is observed in the data. This has been associated with discontinuous, smaller‐scale magmatic layering that is thought to control the extent of the Kevitsa main mineralization. Thus, our 3D model of the extents of the internal reflectors can provide a framework for near‐mine and deep exploration of the main type of mineralization in the area. In addition to exploration, the original purpose of the 3D seismic survey was geotechnical planning of the Kevitsa open‐pit mine. Accordingly, the 3D seismic data were used to create a 3D model of the subsurface structures, with a focus on the vicinity of the mine. The interpreted structures reveal a complex pattern of fault and fracture zones, some of which will be important for slope stability and operational planning of the final stages of the mine. |
format |
Article in Journal/Newspaper |
author |
Koivisto, E. Malehmir, A. Hellqvist, N. Voipio, T. Wijns, C. |
spellingShingle |
Koivisto, E. Malehmir, A. Hellqvist, N. Voipio, T. Wijns, C. Building a 3D model of lithological contacts and near‐mine structures in the Kevitsa mining and exploration site, Northern Finland: constraints from 2D and 3D reflection seismic data |
author_facet |
Koivisto, E. Malehmir, A. Hellqvist, N. Voipio, T. Wijns, C. |
author_sort |
Koivisto, E. |
title |
Building a 3D model of lithological contacts and near‐mine structures in the Kevitsa mining and exploration site, Northern Finland: constraints from 2D and 3D reflection seismic data |
title_short |
Building a 3D model of lithological contacts and near‐mine structures in the Kevitsa mining and exploration site, Northern Finland: constraints from 2D and 3D reflection seismic data |
title_full |
Building a 3D model of lithological contacts and near‐mine structures in the Kevitsa mining and exploration site, Northern Finland: constraints from 2D and 3D reflection seismic data |
title_fullStr |
Building a 3D model of lithological contacts and near‐mine structures in the Kevitsa mining and exploration site, Northern Finland: constraints from 2D and 3D reflection seismic data |
title_full_unstemmed |
Building a 3D model of lithological contacts and near‐mine structures in the Kevitsa mining and exploration site, Northern Finland: constraints from 2D and 3D reflection seismic data |
title_sort |
building a 3d model of lithological contacts and near‐mine structures in the kevitsa mining and exploration site, northern finland: constraints from 2d and 3d reflection seismic data |
publisher |
Wiley |
publishDate |
2015 |
url |
http://dx.doi.org/10.1111/1365-2478.12252 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2478.12252 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2478.12252 |
genre |
Northern Finland |
genre_facet |
Northern Finland |
op_source |
Geophysical Prospecting volume 63, issue 4, page 754-773 ISSN 0016-8025 1365-2478 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/1365-2478.12252 |
container_title |
Geophysical Prospecting |
container_volume |
63 |
container_issue |
4 |
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754 |
op_container_end_page |
773 |
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1802648133473140736 |