Thermal and chemical variations in metamorphic rocks in Nautanen, Gällivare, Sweden
This study focuses on the geology of the Nautanen area. It is part of the SGU-financed project, Metamorphic Map of Sweden, which aims to compile metamorphic data from Sweden and takes the form of a number of Bachelor and Master projects. The main metamorphic event in the Nautanen area is the Svecoka...
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Stockholms universitet, Institutionen för geologiska vetenskaper
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ftstockholmuniv:oai:DiVA.org:su-149643 2023-05-15T16:19:32+02:00 Thermal and chemical variations in metamorphic rocks in Nautanen, Gällivare, Sweden Tollefsen, Elin 2014 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-149643 eng eng Stockholms universitet, Institutionen för geologiska vetenskaper http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-149643 info:eu-repo/semantics/openAccess Nautanen Metamorphism Geology Geologi Student thesis info:eu-repo/semantics/bachelorThesis text 2014 ftstockholmuniv 2023-02-23T21:39:05Z This study focuses on the geology of the Nautanen area. It is part of the SGU-financed project, Metamorphic Map of Sweden, which aims to compile metamorphic data from Sweden and takes the form of a number of Bachelor and Master projects. The main metamorphic event in the Nautanen area is the Svecokarelian Orogeny (1.96 – 1.75 Ga). The samples are metamorphosed sedimentary and volcanic rocks, which were intruded by intermediate to mafic intrusions and a later granite intrusion. The supracrustal rocks are folded and the Nautanen Deformation Zone (NDZ) traverses the area in a NW to SE direction. Petrographic studies, XRF analysis and THERMOCALC were used to estimate pressure and temperature and to elucidate evidence of fluid mobility. The average pressure was assumed to be below 4 kbar because of the presence of andalusite. The lowest and highest temperatures for metamorphism were 474±43°C and 681±14°C, with highest temperatures recorded nearest to the granite intrusion. XRF analysis revealed high concentrations of Ba (up to 7000 ppm) in the NDZ. High concentrations of Ba, skarn formation and replacement of garnet by chlorite indicate fluid-controlled metamorphism in the NDZ. The increasing temperature towards the granite intrusion suggests regional or contact prograde metamorphism that need not be related to the NDZ. Metamorphic Map of Sweden, SGU-project Bachelor Thesis Gällivare Stockholm University: Publications (DiVA) Gällivare ENVELOPE(20.660,20.660,67.132,67.132) Nautanen ENVELOPE(20.883,20.883,67.183,67.183) |
institution |
Open Polar |
collection |
Stockholm University: Publications (DiVA) |
op_collection_id |
ftstockholmuniv |
language |
English |
topic |
Nautanen Metamorphism Geology Geologi |
spellingShingle |
Nautanen Metamorphism Geology Geologi Tollefsen, Elin Thermal and chemical variations in metamorphic rocks in Nautanen, Gällivare, Sweden |
topic_facet |
Nautanen Metamorphism Geology Geologi |
description |
This study focuses on the geology of the Nautanen area. It is part of the SGU-financed project, Metamorphic Map of Sweden, which aims to compile metamorphic data from Sweden and takes the form of a number of Bachelor and Master projects. The main metamorphic event in the Nautanen area is the Svecokarelian Orogeny (1.96 – 1.75 Ga). The samples are metamorphosed sedimentary and volcanic rocks, which were intruded by intermediate to mafic intrusions and a later granite intrusion. The supracrustal rocks are folded and the Nautanen Deformation Zone (NDZ) traverses the area in a NW to SE direction. Petrographic studies, XRF analysis and THERMOCALC were used to estimate pressure and temperature and to elucidate evidence of fluid mobility. The average pressure was assumed to be below 4 kbar because of the presence of andalusite. The lowest and highest temperatures for metamorphism were 474±43°C and 681±14°C, with highest temperatures recorded nearest to the granite intrusion. XRF analysis revealed high concentrations of Ba (up to 7000 ppm) in the NDZ. High concentrations of Ba, skarn formation and replacement of garnet by chlorite indicate fluid-controlled metamorphism in the NDZ. The increasing temperature towards the granite intrusion suggests regional or contact prograde metamorphism that need not be related to the NDZ. Metamorphic Map of Sweden, SGU-project |
format |
Bachelor Thesis |
author |
Tollefsen, Elin |
author_facet |
Tollefsen, Elin |
author_sort |
Tollefsen, Elin |
title |
Thermal and chemical variations in metamorphic rocks in Nautanen, Gällivare, Sweden |
title_short |
Thermal and chemical variations in metamorphic rocks in Nautanen, Gällivare, Sweden |
title_full |
Thermal and chemical variations in metamorphic rocks in Nautanen, Gällivare, Sweden |
title_fullStr |
Thermal and chemical variations in metamorphic rocks in Nautanen, Gällivare, Sweden |
title_full_unstemmed |
Thermal and chemical variations in metamorphic rocks in Nautanen, Gällivare, Sweden |
title_sort |
thermal and chemical variations in metamorphic rocks in nautanen, gällivare, sweden |
publisher |
Stockholms universitet, Institutionen för geologiska vetenskaper |
publishDate |
2014 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-149643 |
long_lat |
ENVELOPE(20.660,20.660,67.132,67.132) ENVELOPE(20.883,20.883,67.183,67.183) |
geographic |
Gällivare Nautanen |
geographic_facet |
Gällivare Nautanen |
genre |
Gällivare |
genre_facet |
Gällivare |
op_relation |
http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-149643 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766005916005564416 |