The earliest Paleoproterozoic supracrustal rocks in Koillismaa, northern Finland - Their petrographic and geochemical characteristics and lithostratigraphy [PDF]
The 2.44 Ga Koillismaa layered igneous complex (KLIC) in northern Finland is interpreted to have formed as a consequence of early Paleoproterozoic continental rifting.
L.S. Lauri, T. Karinen, J. Räsänen
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Precambrian crustal evolution and Cretaceous–Palaeogene faulting in West Greenland: The Nordre Strømfjord shear zone and the Arfersiorfik quartz diorite in Arfersiorfik, the Nagssugtoqidian orogen, West Greenland [PDF]
The Nordre Strømfjord shear zone in the fjord Arfersiorfik, central West Greenland, consists of alternating panels of supracrustal rocks and orthogneisses which together form a vertical zone up to 7 km wide with sinistral transcurrent, ductile ...
Stensgaard, Bo Møller +3 more
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Geochemical and boron isotopic compositions of tourmalines from selected gold-mineralised and barren rocks in SW Finland [PDF]
Tourmaline-bearing rocks and a number of gold occurrences coexist in southwestern Finland, in a region where extensive magmatism and hydrothermal systems occurred during the Svecofennian orogeny, 1.9-1.8 Ga ago.
M. Talikka, S. Vuori
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The paper considers the possible correlation of the rocks of the Chervurt Formation in the Kolmozero-Voron'ya zone with its constituent supracrustal complexes and the formations of the adjacent Keivy domain, as well as the role that metasedimentary rocks
Kozlov N. E., Sorokhtin N. O.
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The Kummitsoiva komatiite complex and its satellites in northern Finland [PDF]
The Kummitsoiva komatiite complex and its satellites, regarded either as Archean or Proterozoic in age, consist principally of amphibole- chlorite rocks corresponding chemically to basaltic komatiite of the Geluk type in South Africa.
M. Saverikko
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Temporal and Hf isotope geochemical evolution of southern Finnish Lapland from 2.77 Ga to 1.76 Ga [PDF]
The southern Finnish Lapland area in the central part of the Fennoscandian shield is a geologically complex zone comprising several Archean blocks and Paleoproterozoic supracrustal belts all of which are intruded by voluminous Paleoproterozoic granites ...
L.S. Lauri +3 more
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Precambrian crustal evolution and Cretaceous–Palaeogene faulting in West Greenland: 207Pb-206Pb dating of magnetite, monazite and allanite in the central and northern Nagssugtoqidian orogen, West Greenland [PDF]
Pb-isotopic data for magnetite from amphibolites in the Nagssugtoqidian orogen, central West Greenland, have been used to trace their source characteristics and the timing of metamorphism. Analyses of the magnetite define a Pb-Pb isochron age of 1726 ± 7
Frei, Robert +2 more
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Petrological and structural analysis of the Haukivesi area between Varkaus and Savonlinna, Finland [PDF]
The Haukivesi area is part of a Precambrian orogenic belt. Its supracrustal rocks can be regarded as having been deposited in a geosynclinal system consisting of an eugeosynclinal basin in the northern and central Haukivesi area and a miogeosynclinal ...
G. Gaál, E. Rauhamäki
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Stratigraphy and geochronlogy of the Guarinos greenstone belt, Goiás, Brazil [PDF]
The Guarinos greenstone belt is one of the three low metamorphic grade supracrustal rocks assemblage rimmed by orthogneissesof Central Brazil’s Archean Block northern limits.
Hardy Jost +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]
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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