Structural evolution of the Vuotso area, Finnish Lapland
The Vuotso area is structurally interesting because the fold interference pattern in rocks of central Lapland changes into thrust-related foliation of the Lapland Granulite Belt. A felsic volcanic rock yielded a 2.45 Ga age and conformed that the volcanic rocks in the Vuotso area are (mainly) Paleop...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Geological Society of Finland
2003-12-01
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| Series: | Bulletin of the Geological Society of Finland |
| Subjects: | |
| Online Access: | http://www.geologinenseura.fi/bulletin/Volume75/NironenManttari.pdf |
| _version_ | 1818236389283594240 |
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| author | M. Nironen I. Mänttäri |
| author_facet | M. Nironen I. Mänttäri |
| author_sort | M. Nironen |
| collection | DOAJ |
| description | The Vuotso area is structurally interesting because the fold interference pattern in rocks of central Lapland changes into thrust-related foliation of the Lapland Granulite Belt. A felsic volcanic rock yielded a 2.45 Ga age and conformed that the volcanic rocks in the Vuotso area are (mainly) Paleoproterozoic. A structural sequence with recumbent F2 folding and predominant S2 foliation, and an interference pattern of F3 and F4 foldings could be discerned in the supracrustal rocks. A large D3 antiform is overprinted by mafic-intermediate gneisses that form the basal part of the thrust sequence. The curving of late D3 shear zones suggests that D3 deformation may be associated with thrusting from east-northeast, but thrusting of the granulites and adjacent mafic-intermediate gneisses to their present position is interpreted as a post-D3 event. |
| first_indexed | 2024-12-12T12:09:05Z |
| format | Article |
| id | doaj.art-ce08327090cc47e0998560a8ba8c277e |
| institution | Directory Open Access Journal |
| issn | 0367-5211 1799-4632 |
| language | English |
| last_indexed | 2024-12-12T12:09:05Z |
| publishDate | 2003-12-01 |
| publisher | Geological Society of Finland |
| record_format | Article |
| series | Bulletin of the Geological Society of Finland |
| spelling | doaj.art-ce08327090cc47e0998560a8ba8c277e2022-12-22T00:24:56ZengGeological Society of FinlandBulletin of the Geological Society of Finland0367-52111799-46322003-12-01751-29310110.17741/bgsf/75.1-2.006Structural evolution of the Vuotso area, Finnish LaplandM. NironenI. MänttäriThe Vuotso area is structurally interesting because the fold interference pattern in rocks of central Lapland changes into thrust-related foliation of the Lapland Granulite Belt. A felsic volcanic rock yielded a 2.45 Ga age and conformed that the volcanic rocks in the Vuotso area are (mainly) Paleoproterozoic. A structural sequence with recumbent F2 folding and predominant S2 foliation, and an interference pattern of F3 and F4 foldings could be discerned in the supracrustal rocks. A large D3 antiform is overprinted by mafic-intermediate gneisses that form the basal part of the thrust sequence. The curving of late D3 shear zones suggests that D3 deformation may be associated with thrusting from east-northeast, but thrusting of the granulites and adjacent mafic-intermediate gneisses to their present position is interpreted as a post-D3 event.http://www.geologinenseura.fi/bulletin/Volume75/NironenManttari.pdfstructural geologystructural analysisgranulitesgneissesmetavolcanic rocksabsolute ageU/PbPaleoproterozoicVuotsoLapland ProvinceFinland |
| spellingShingle | M. Nironen I. Mänttäri Structural evolution of the Vuotso area, Finnish Lapland Bulletin of the Geological Society of Finland structural geology structural analysis granulites gneisses metavolcanic rocks absolute age U/Pb Paleoproterozoic Vuotso Lapland Province Finland |
| title | Structural evolution of the Vuotso area, Finnish Lapland |
| title_full | Structural evolution of the Vuotso area, Finnish Lapland |
| title_fullStr | Structural evolution of the Vuotso area, Finnish Lapland |
| title_full_unstemmed | Structural evolution of the Vuotso area, Finnish Lapland |
| title_short | Structural evolution of the Vuotso area, Finnish Lapland |
| title_sort | structural evolution of the vuotso area finnish lapland |
| topic | structural geology structural analysis granulites gneisses metavolcanic rocks absolute age U/Pb Paleoproterozoic Vuotso Lapland Province Finland |
| url | http://www.geologinenseura.fi/bulletin/Volume75/NironenManttari.pdf |
| work_keys_str_mv | AT mnironen structuralevolutionofthevuotsoareafinnishlapland AT imanttari structuralevolutionofthevuotsoareafinnishlapland |