Petrophysical Properties of Rocks in Central Kiruna Mining District, Sweden
High economic and metallogenic significance of northern Norrbotten ore district in Sweden which hosts Kiruna mining district makes it a very important ore district in the world. Northern Norrbotten ore district contributes a combined 90 percent of iron production in Europe. Present day Kiruna mining...
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Uppsala universitet, Institutionen för geovetenskaper
2023
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ftuppsalauniv:oai:DiVA.org:uu-496414 2023-05-15T17:04:05+02:00 Petrophysical Properties of Rocks in Central Kiruna Mining District, Sweden Petrofysiska egenskaper hos bergarter i Kirunas gruvområde Dagbui, Simon Peter 2023 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-496414 eng eng Uppsala universitet, Institutionen för geovetenskaper Uppsala University Examensarbete vid Institutionen för geovetenskaper, 1650-6553 587 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-496414 info:eu-repo/semantics/openAccess Kiruna mining district Common earth model petrophysics density AMS complex electrical resistivity NRM magnetization IOA Kirunavaara Mineralization Geosciences Multidisciplinary Multidisciplinär geovetenskap Student thesis info:eu-repo/semantics/bachelorThesis text 2023 ftuppsalauniv 2023-03-08T23:29:33Z High economic and metallogenic significance of northern Norrbotten ore district in Sweden which hosts Kiruna mining district makes it a very important ore district in the world. Northern Norrbotten ore district contributes a combined 90 percent of iron production in Europe. Present day Kiruna mining district is host to Iron-oxide-Apatite (IOA), Viscaria, Iron-Oxide-Copper-Gold and Pahtohavare deposits. However, it is famous for its IOA Kirunavaara mineralization which is a giant ore body of high-grade magnetite. Results from earlier mineral prospecting activities indicates volume of orebody diminishes at depth especially towards the south. In this study, petrophysical measurements and data analysis of rock samples from outcrops in Kiruna mining district are performed. Physical rock properties govern geophysical survey techniques hence are used as petrophysical constraint in geophysical modelling to develop a common earth model of the mining district. Common earth modelling involves integrating all relevant geological, geophysical and petrophysical data in the model. This is to improve the understanding and knowledge of the orebody and aid long term mine planning activities in the mining district. Rock physical properties investigated include density, magnetic (anisotropy of magnetic susceptibility, natural remanent magnetisation) and electrical (complex electrical resistivity) properties. Block samples were collected from 34 outcrops in the Kiruna mining district and cut into cubes. Density of rocks samples ranged from 2388 to 3093 kgm-3. Rock types of most samples are belonging to the porphyry group based on previous gravity and density modelling of Kirunavaara mineralization. Variation in degree of induced (anisotropic) magnetic susceptibility (AMS), dominance of prolate ellipsoid of AMS parameters follow trend of geological structures are noted with reference to rock types. Mechanism of induced polarization (IP) in rock samples is of grain polarization type due to presence of metallic minerals disseminated in ... Bachelor Thesis Kiruna Norrbotten Uppsala University: Publications (DiVA) Kiruna Kirunavaara ENVELOPE(20.200,20.200,67.817,67.817) |
institution |
Open Polar |
collection |
Uppsala University: Publications (DiVA) |
op_collection_id |
ftuppsalauniv |
language |
English |
topic |
Kiruna mining district Common earth model petrophysics density AMS complex electrical resistivity NRM magnetization IOA Kirunavaara Mineralization Geosciences Multidisciplinary Multidisciplinär geovetenskap |
spellingShingle |
Kiruna mining district Common earth model petrophysics density AMS complex electrical resistivity NRM magnetization IOA Kirunavaara Mineralization Geosciences Multidisciplinary Multidisciplinär geovetenskap Dagbui, Simon Peter Petrophysical Properties of Rocks in Central Kiruna Mining District, Sweden |
topic_facet |
Kiruna mining district Common earth model petrophysics density AMS complex electrical resistivity NRM magnetization IOA Kirunavaara Mineralization Geosciences Multidisciplinary Multidisciplinär geovetenskap |
description |
High economic and metallogenic significance of northern Norrbotten ore district in Sweden which hosts Kiruna mining district makes it a very important ore district in the world. Northern Norrbotten ore district contributes a combined 90 percent of iron production in Europe. Present day Kiruna mining district is host to Iron-oxide-Apatite (IOA), Viscaria, Iron-Oxide-Copper-Gold and Pahtohavare deposits. However, it is famous for its IOA Kirunavaara mineralization which is a giant ore body of high-grade magnetite. Results from earlier mineral prospecting activities indicates volume of orebody diminishes at depth especially towards the south. In this study, petrophysical measurements and data analysis of rock samples from outcrops in Kiruna mining district are performed. Physical rock properties govern geophysical survey techniques hence are used as petrophysical constraint in geophysical modelling to develop a common earth model of the mining district. Common earth modelling involves integrating all relevant geological, geophysical and petrophysical data in the model. This is to improve the understanding and knowledge of the orebody and aid long term mine planning activities in the mining district. Rock physical properties investigated include density, magnetic (anisotropy of magnetic susceptibility, natural remanent magnetisation) and electrical (complex electrical resistivity) properties. Block samples were collected from 34 outcrops in the Kiruna mining district and cut into cubes. Density of rocks samples ranged from 2388 to 3093 kgm-3. Rock types of most samples are belonging to the porphyry group based on previous gravity and density modelling of Kirunavaara mineralization. Variation in degree of induced (anisotropic) magnetic susceptibility (AMS), dominance of prolate ellipsoid of AMS parameters follow trend of geological structures are noted with reference to rock types. Mechanism of induced polarization (IP) in rock samples is of grain polarization type due to presence of metallic minerals disseminated in ... |
format |
Bachelor Thesis |
author |
Dagbui, Simon Peter |
author_facet |
Dagbui, Simon Peter |
author_sort |
Dagbui, Simon Peter |
title |
Petrophysical Properties of Rocks in Central Kiruna Mining District, Sweden |
title_short |
Petrophysical Properties of Rocks in Central Kiruna Mining District, Sweden |
title_full |
Petrophysical Properties of Rocks in Central Kiruna Mining District, Sweden |
title_fullStr |
Petrophysical Properties of Rocks in Central Kiruna Mining District, Sweden |
title_full_unstemmed |
Petrophysical Properties of Rocks in Central Kiruna Mining District, Sweden |
title_sort |
petrophysical properties of rocks in central kiruna mining district, sweden |
publisher |
Uppsala universitet, Institutionen för geovetenskaper |
publishDate |
2023 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-496414 |
long_lat |
ENVELOPE(20.200,20.200,67.817,67.817) |
geographic |
Kiruna Kirunavaara |
geographic_facet |
Kiruna Kirunavaara |
genre |
Kiruna Norrbotten |
genre_facet |
Kiruna Norrbotten |
op_relation |
Examensarbete vid Institutionen för geovetenskaper, 1650-6553 587 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-496414 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766058116771741696 |