Magnetite and ilmenite from some Finnish rocks [PDF]
Bulletin of the Geological Society of Finland, 1972 Coexisting accessory magnetite and ilmenite -were separated and chemically analysed from five Finnish Precambrian rocks: anorogenic olivine diabase and gabbroanorthosite as well as three metamorphosed Svecofennian quartz diorites.
I. Haapala, P. Ojanperä
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Paleoproterozoic post-orogenic magmatism in southern Finland; geochemical, geochronological and Sr-Nd isotopic constraints on origin and magmatic evolution [PDF]
Bulletin of the Geological Society of FinlandFifteen post-orogenic, basic to acidic High-Barium-Strontium (HiBaSr) intrusions of shoshonitic affinity have been recognized in central and southern Finland.
Oliver Teräs +5 more
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Metasomatic monazite growth as a result of apatite-fluid interactions: U-Pb dating of monazite in the Siilinjärvi glimmerite-carbonatite complex, Finland [PDF]
Bulletin of the Geological Society of FinlandMonazite U-Pb results obtained for a calcite carbonatite sample from the Siilinjärvi glimmerite-carbonatite complex yields a lower concordia intercept age of 1760 ± 17 Ma (2σ uncertainty, n = 50).
Seppo Karvinen +4 more
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Early Proterozoic stratigraphy of the Salahmi-Pyhäntä area, central Finland, with an emphasis on applying the principles of lithodemic stratigraphy to a complexly deformed and metamorphosed bedrock [PDF]
Bulletin of the Geological Society of Finland, 1988 The medium-highly metamorphozed and intensely deformed early Proterozoic supracrustal rocks of the study area, located at the boundary zone between the Karelian and Svecofennian zones in central Finland, are classified following the recommendations of ...
K. Laajoki, J. Luukas
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The 1.88 Ga Kotalahti and Vammala nickel belts, Finland: Geochemistry of the mafic and ultramafic metavolcanic rocks [PDF]
Bulletin of the Geological Society of Finland, 2009 The mafic and ultramafic volcanic rocks within the Svecofennian (1.88 Ga) Kotalahti and Vammala Nickel Belts, Finland, are spatially associated and coeval with a suite of mineralized mafic-ultramafic intrusions.
S.J. Barnes +4 more
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Structural observations and U-Pb mineral ages from igneous rocks at the Archaean-Palaeoproterozoic boundary in the Salahmi Schist Belt, central Finland: constraints on tectonic evolution [PDF]
Bulletin of the Geological Society of Finland, 1999 The study area in Vieremä, central Finland, contains part of Archaean-Palaeoproterozoic boundary. In the east, the area comprises Archaean gneiss and the Salahmi Schist Belt. The rocks of the schist belt are turbiditic metagreywackes, with well-preserved
K. Pietikäinen, M. Vaasjoki
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The »Bockholm conglomerate» – an intrusive breccia in Åland, SW Finland [PDF]
Bulletin of the Geological Society of Finland, 1979 Three breccias composed of a heterogeneous mixture of rock fragments in a clastic matrix have been studied in the Enklinge area, southwestern Finland.
C. Ehlers
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An intrusive-like tectonic breccia in the archipelago of southwestern Finland [PDF]
Bulletin of the Geological Society of Finland, 1986 On an islet in the archipelago of southwestern Finland with metamorphic rocks belonging to the Svecofennian zone it is possible to follow in exposure for a distance of some metres the transition from a layered paragneiss with amphibolite bands to a ...
N. Edelman, L. Bergman, B. Lindberg
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1865 Ma tholeiitic magmatism during an extensional episode of the Svecofennian orogeny: the Kaiplot gabbros in Nagu (Nauvo), southwestern Finland [PDF]
Bulletin of the Geological Society of FinlandThe Svecofennian orogeny in southern Finland has traditionally been divided into two broadly defined compressional stages, the 1.89–1.87 Ga “synorogenic” stage and the ca 1.84–1.81 Ga “lateorogenic” stage.
Olav Eklund, Jussi S. Heinonen
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Svecofennian intra-orogenic gabbroic magmatism: A case study from Turku, southwestern Finland [PDF]
Bulletin of the Geological Society of Finland, 2014 Using single-grain zircon U-Pb dating by LA-MC-ICPMS and whole-rock geochemistry, we have studied the Palaeoproterozoic gabbroic rocks from Moisio in southwest Finland. Three ages were obtained.
J. Nevalainen +4 more
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