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Basement–cover relationships during polyphase deformation in the Svecokarelides of the Kaavi district, eastern Finland

Published online by Cambridge University Press:  03 November 2011

Adrian F. Park  and
D. R. Bowes
Adrian F. Park
Affiliation:
Department of Geology, University of Glasgow, Glasgow G12 8QQ, Scotland.
D. R. Bowes
Affiliation:
Department of Geology, University of Glasgow, Glasgow G12 8QQ, Scotland.
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Abstract

For much of its length in eastern Finland, the contact between the late Archaean granitoid terrane and early Proterozoic supracrustal rocks is that of a depositional unconformity tectonically modified during the Svecokarelian orogeny. In the Kaavi district, this modification has been extensive, particularly because of thrusting which resulted in tectonic slices of basement being present as inliers within the cover rocks and cover rocks as outliers within the main basement outcrop. Both basement and cover have undergone repeated deformation and metamorphic recrystallisation reflected by the presence of multiple tectonic fabrics and sequential mineral growths. However, it is only locally in major zones of movement that the basement rocks of the Presvecokarelides show major modification as the result of the deformation which had such a profound effect on the cover rocks during the development of the Svecokarelides. Over large areas, the products of four phases of deformation (DI–IV) remain in the basement gneisses together with the products of basic and acidic intrusion whose positions in the deformational sequence can be established‥

In the cover rocks, early nappe emplacement (Outokumpu nappe) was followed by the development of isoclinal folds associated with prograde metamorphism (D1). Regionally expressed asymmetrical folds, overturned to the E, with attenuation of overturned limbs and thrusting, involving basement, followed (D2). Subsequent deformation related to wrench faulting (D2c) was followed by the development of more open folds associated with declining geotherms (D3, D4); F3–F4 interference structures are expressed as domes, some of which were a locus of granitoid emplacement (Maarianvaara granitoid suite). D5 and D6 are expressed as cleavages and fractures.

Correlation of the structural features in the Kaavi district with those in the Outokumpu and adjacent districts forms the basis both for establishing the regional disposition of basement and cover units and for determining the structural evolution of this part of the Svecokarelides.

Keywords

correlationdeformationfoldgneissJatulianKalevianlineation“mantled gneiss dome”metamorphismmylonitenappeOutokumpuphyllonitepolyphasePresvecokarelidesschistschistositystructural sequencethrust.
Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 74 , Issue 2 , 1983 , pp. 95 - 118
Copyright
Copyright © Royal Society of Edinburgh 1983

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References

Bowes, D. R. 1976a. Tectonics in the Baltic Shield in the period 2000–1500 million years ago. ACTA GEOL POL 26, 355–76.Google Scholar
Bowes, D. R. 1976b. Archaean crustal history in the Baltic Shield. In Windley, B. F. (ed.) The Early History of the Earth, 481–88. London: Wiley.Google Scholar
Bowes, D. R. 1980a. Correlation in the Svecokarelides and a crustal model. In Mitrofanov, F. P. (ed.) Principles and criteria of sub-division of Precambrian in mobile zones, 294–303. Leningrad: Nauka.Google Scholar
Bowes, D. R. 1980b. Structural sequence in the gneissose complex of eastern Finland as a basis for correlation in the Presvecokarelides. ACTA GEOL POL 30, 15–26.Google Scholar
Bowes, D. R., Halden, N. M., Koistinen, T. J. & Park, A. F. 1984. Structural features of basement and cover rocks in the eastern Svecokarelides, Finland. In Kröner, A. & Greiling, R. (eds) Precambrian Tectonics Illustrated. Stuttgart: Schweizerbart'sche Verlagsbuchhandlung (in press).Google Scholar
Bowes, D. R. & Jones, K. A. 1958. Sedimentary features and tectonics in the Dalradian of Western Perthshire. TRANS EDINBURGH GEOL SOC 17, 133–40.CrossRefGoogle Scholar
Bradbury, H. J., Harris, A. L. & Smith, R. A. 1979. Geometry and emplacement of nappes in the central Scottish Highlands. In Harris, A. L., Holland, C. H. & Leake, B. E. (eds) The Caledonides of the British Isles—reviewed, 213–20. GEOL SOC LONDON SPEC PUBL 8.Google Scholar
Brun, J.-P. 1980. The cluster-ridge pattern of mantled gneiss-domes in eastern Finland: evidence for large-scale gravitational instability of the Proterozoic crust. EARTH PLANET SCI LETT 47, 441–9.CrossRefGoogle Scholar
Campbell, D. S., Treloar, P. J. & Bowes, D. R. 1979. Metamorphic history of staurolite-bearing schist from the Svecokarelides near Heinävaara, eastern Finland. GEOL FÖREN STOCKHOLM FÖRH 101, 105–18.CrossRefGoogle Scholar
Coward, M. P. & Siddans, A. W. B. 1979. The tectonic evolution of the Welsh Caledonides. In Harris, A. L., Holland, C. H. & Leake, B. E. (eds) The Caledonides of the British Isles—reviewed, 187–98. GEOL SOC LONDON SPEC PUBL 8.Google Scholar
Dimroth, E. 1970. Evolution of the Labrador Geosyncline. BULL GEOL SOC AM 81, 2717–42.CrossRefGoogle Scholar
Eskola, P. 1933. On the chrome minerals of Outokumpu. BULL COMM GEOL FINL 103, 26–44.Google Scholar
Eskola, P. E. 1949. The problem of mantled gneiss-domes. Q J GEOL SOC LONDON 104 (for 1948), 461–76.CrossRefGoogle Scholar
Eskola, P. E. 1963. The Precambrian in Finland. In Rankama, K. (ed.) The Precambrian, Vol. 1, 145–263. New York: Wiley.Google Scholar
Fleuty, M. J. 1964. The description of folds. PROC GEOL ASS 75, 461–92.CrossRefGoogle Scholar
Frosterus, B. & Wilkman, W. W. 1920. Suomen Geologinen Yleiskartta, Lehti D3; Joensuu. Helsinki: Geologinen Tutkimuslaitos.Google Scholar
Gaál, G., Koistinen, T. J. & Mattila, E. 1975. Tectonics and stratigraphy of the vicinity of Outokumpu, N. Karelia, Finland. BULL GEOL SURV FINL 271.Google Scholar
Halden, N. M. 1982a. Structural, metamorphic and igneous history of migmatites in the deep levels of a wrench fault regime, Savonranta, eastern Finland. TRANS R SOC EDINBURGH EARTH SCI 73, 17–20.CrossRefGoogle Scholar
Halden, N. M. 1982b. The development of granites and migmatites in the deep levels of a wrench fault zone, Savonranta, eastern Finland. Unpublished Ph.D. Thesis, Glasgow University.CrossRefGoogle Scholar
Hobbs, B. E., Means, W. D. & Williams, P. F. 1976. An Outline of Structural Geology. New York: Wiley.Google Scholar
Hopgood, A. M. 1980. Polyphase fold analysis of gneisses and migmatites. TRANS R SOC EDINBURGH EARTH SCI 71, 55–68.CrossRefGoogle Scholar
Hopgood, A. M., Bowes, D. R., Kouvo, O. & Halliday, A. N. 1983. U–Pb and Rb–Sr isotopie study of polyphase deformed migmatites in the Svecokarelides southern Finland. In Atherton, M. P. and Gribble, C. D. (eds) Migmatites, melting and metamorphism, 80–92. Nantwich: Shiva.Google Scholar
Huhma, A. 1971. Geological map of Finland. 1:100,000 sheets 4222, 4224, 4311. Otaniemi: Geological Survey of Finland.Google Scholar
Huhma, A. 1975. Precambrian rocks of the Outokumpu, Polvijärvi and Sivakkavaara map sheets. 1:100,000 (Summary in English). Espoo: Geological Survey of Finland.Google Scholar
Huhma, A. 1976. New aspects to the geology of the Outokumpu region. BULL GEOL SOC FINL 48, 5–24.CrossRefGoogle Scholar
Hutton, D. H. W. 1979. Tectonic slides: a review and reappraisal. EARTH SCI REV 15, 151–72.CrossRefGoogle Scholar
Koistinen, T. J. 1981. Structural evolution of an early Proterozoic strata-bound Cu–Co–Zn deposit, Outokumpu, Finland. TRANS R SOC EDINBURGH EARTH SCI 72, 115–58.CrossRefGoogle Scholar
Kuovo, O. & Tilton, G. R. 1966. Mineral ages from the Finnish Precambrian. J GEOL 71, 421–42.CrossRefGoogle Scholar
Mitra, G. 1978. Ductile deformation zones and mylonites: the mechanical processes involved in the deformation of crystalline basement rocks. AM J SCI 278, 1057–84.CrossRefGoogle Scholar
Ojakangas, R. W. 1965. Petrography and sedimentation of the Pre-Cambrian Jatulian Quartzites of Finland. BULL COMM GEOL FINL 214, 7–74.Google Scholar
Park, A. F. 1981. Basement gneiss domes in the Svecokarelides of eastern Finland: discussion. EARTH PLANET SCI LETT 55, 199–203.CrossRefGoogle Scholar
Park, A. F. 1983a. The origin and tectonic setting of serpentinites and related rocks in the Outokumpu assemblage of the Svecokarelides, eastern Finland. Unpublished Ph.D. Thesis, Glasgow University.Google Scholar
Park, A. F. 1983b. Sequential development of metamorphic fabric and structural elements in polyphase deformed serpentinites in the Svecokarelides of eastern Finland. TRANS R SOC EDINBURGH EARTH SCI 74, 33–60.CrossRefGoogle Scholar
Park, A. F. 1984. Nature, affinities and significance of metavolcanic rocks in the Outokumpu assemblage of the Svecokarelides, eastern Finland. BULL GEOL SOC FINL 56(1), (in press).Google Scholar
Pekkarinen, L. J. 1979. The Karelian formations and their depositional basement in the Kiihtelysvaara-Värtsilä area, east Finland. BULL GEOL SURV FINL 301.Google Scholar
Roberts, J. L. & Treagus, J. E. 1979. Stratigraphical and structural correlation between the Dalradian rocks of the S.W. and central Highlands of Scotland. In Harris, A. L., Holland, C. H. & Leake, B. E. (eds) The Caledonides of the British Isles—reviewed, 199–204. GEOL SOC LONDON SPEC PUBL 8.Google Scholar
Simonen, A. 1980. The Precambrian in Finland. BULL GEOL SURV FINL 304.Google Scholar
Steiger, R. H. & Jäger, E. 1977. Subcommission on Geochronology: convention on the use of decay constants in geo- and cosmochronology. EARTH PLANET SCI LETT 36, 359–62.CrossRefGoogle Scholar
Sturt, B. A. & Harris, A. L. 1961. The metamorphic history of the Loch Tummel area, central Perthshire, Scotland. LIVERPOOL MANCHESTER GEOL J 2, 689–711.CrossRefGoogle Scholar
Sutton, J. & Watson, J. V. 1955. The structure and stratigraphical succession of the Moines of Fannich Forest and Strath Ban, Ross-shire. Q J GEOL SOC LONDON 110, 21–53.CrossRefGoogle Scholar
Sutton, J. & Watson, J. V. 1959. Structures in the Caledonides between Loch Duich and Glenelg, north-west Highlands. Q J GEOL SOC LONDON 114, 231–58.CrossRefGoogle Scholar
van Breemen, O. & Bowes, D. R. 1977. Rb–Sr muscovite age of a pegmatite near Sivakkavaara, Finland. BULL GEOL SOC FINL 49, 7–10.CrossRefGoogle Scholar
Väyrynen, H. 1939. On the geology and tectonics of the Outokumpu ore field and region. BULL COMM GEOL FINL 124.Google Scholar
Wegmann, C. E. 1928. Über die Tektonik der jüngeren Faltung in Ostfinnland. FENNIA 50(16).Google Scholar
Wynne-Edwards, H. R. 1972. The Grenville Province. In Price, R. A. & Douglas, R. J. W. (eds) Variations in tectonic styles in Canada, 263–334. GEOL ASSOC CANADA SPEC PAP 11.Google Scholar