Results 1 to 10 of about 318,975 (205)

The earliest Paleoproterozoic supracrustal rocks in Koillismaa, northern Finland - Their petrographic and geochemical characteristics and lithostratigraphy [PDF]

open access: yesBulletin of the Geological Society of Finland, 2003
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
doaj   +2 more sources

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]

open access: yesGeological Survey of Denmark and Greenland Bulletin, 2006
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]

open access: yesBulletin of the Geological Society of Finland, 2010
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
doaj   +1 more source

Chervurt formation of the Kolmozero-Voron'ya belt and Keivy domain: A geodynamic reference point for spatial and temporal heterogeneity during the formation of the ancient median massif

open access: yesVestnik MGTU
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.
doaj   +1 more source

The Kummitsoiva komatiite complex and its satellites in northern Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 1983
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
doaj   +1 more source

Temporal and Hf isotope geochemical evolution of southern Finnish Lapland from 2.77 Ga to 1.76 Ga [PDF]

open access: yesBulletin of the Geological Society of Finland, 2012
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
doaj   +1 more source

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]

open access: yesGeological Survey of Denmark and Greenland Bulletin, 2006
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]

open access: yesBulletin of the Geological Society of Finland, 1971
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
doaj   +1 more source

Stratigraphy and geochronlogy of the Guarinos greenstone belt, Goiás, Brazil [PDF]

open access: yesGeologia USP. Série Científica, 2012
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]

open access: yesBulletin 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
doaj   +1 more source

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