Results 11 to 20 of about 11,308,345 (106)

Detrital zircon geochronology of Paleoproterozoic metasedimentary rocks from Jämsä, Central Finland [PDF]

Bulletin of the Geological Society of Finland
In this short communication, we present new detrital single grain zircon U-Pb data for six metasedimentary rock samples from Jämsä, Central Finland.
Perttu Mikkola, Matti Kurhila, Hannu Huhma   +2 more
doaj   +3 more sources

The volcanic rocks of the Länkipohja-Jämsä area in the southern part of the Central Finland Granitoid Complex [PDF]

, 2017
The Länkipohja-Jämsä area is situated in the southern part of the Central Finland Granitoid Complex and consists of granitic plutonic rocks and supracrustal rocks including intermediate volcanic rocks and volcanogenic sediments accompanied with less abundant mafic and felsic variants.
Heikura, A. (Antti)
core   +3 more sources

The 1.88 Ga old Mäntylä Complex, central Finland: emplacement and deformation of mafic to felsic plutonic rocks and associated Mo mineralization [PDF]

Bulletin of the Geological Society of Finland, 1992
The Mäntylä complex is part of the extensive Central Finland Granitoid Complex. The intrusive sequence was established from contact relations as well as from structural and petrographic criteria.
M. Nironen, K. Front
doaj   +1 more source

General geology, alteration, and iron deposits in the Palaeoproterozoic Misi region, northern Finland [PDF]

Bulletin of the Geological Society of Finland, 2003
The Paleoproterozoic Misi region forms the northeastern part of the Peräpohja Schist Belt in northern Finland. The area comprises mafic volcanic land sedimentary rocks, differentiated gabbros, and late-orogenic granitoids.
T. Niiranen, E. Hanski, P. Eilu
doaj   +1 more source

The Orivesi granite batholith, Southern Central Finland - characteristics and emplacement [PDF]

Bulletin of the Geological Society of Finland, 1996
The Orivesi granite batholith is situated in an E-W trending belt of granite intrusions along the southern margin of the Central Finland Granitoid Complex (CFGC).
O. Selonen, C. Ehlers
doaj   +1 more source

Seismic imaging of the gold deposit and geological structures through reprocessing of legacy seismic profiles near Kloof–Driefontein Complex East Mine, South Africa

Geophysical Prospecting, Volume 71, Issue 7, Page 1181-1196, September 2023., 2023
Abstract Two legacy reflection seismic profiles were acquired in 1988, north of the Kloof–Driefontein Complex East Mine in the West Rand goldfield (South Africa), for the purpose of gold exploration and mine planning. These legacy 2D seismic data have been reprocessed using the latest processing tools to improve imaging.
Ndamulelo Mutshafa, Musa S. D. Manzi, Michael Westgate, Ian James, Bojan Brodic, Julie E. Bourdeau, Raymond J. Durrheim, Lindsay Linzer   +7 more
wiley   +1 more source

Garnet growth and mineral geochronology constrains the diachronous Neoproterozoic convergent evolution of the southern Dom Feliciano Belt, Uruguay

Journal of Metamorphic Geology, Volume 41, Issue 7, Page 997-1030, September 2023., 2023
Abstract The Dom Feliciano Belt of southern Brazil and Uruguay represents part of a larger Neoproterozoic orogenic system formed during the amalgamation of Western Gondwana. The hinterland and foreland domains in parts of the belt preserve deformation structures and metamorphic assemblages that developed during early crustal thickening from c.
Jack James Percival, Jiří Konopásek, Pedro Oyhantçabal, Jiří Sláma, Robert Anczkiewicz   +4 more
wiley   +1 more source

Contribution of bedrock structures to the bedrock surface topography and groundwater flow systems within deep glaciofluvial aquifers in Kurikka, Western Finland

Earth Surface Processes and Landforms, Volume 48, Issue 10, Page 2039-2056, August 2023., 2023
We address the relationship between the bedrock structure and bedrock surface topography through conducting structural analysis of the bedrock within the main recharge area of the Kurikka aquifer. Based on the presented results, it is evident that the initial bedrock‐digital elevation model (DEM) with smooth elevation transitions from the elevated ...
Eemi Ruuska, Pietari Skyttä, Niko Putkinen, Tuire Valjus   +3 more
wiley   +1 more source

Summanen structure: Further geological and geophysical evidence of a meteorite impact event in Central Finland

Meteoritics &Planetary Science, Volume 58, Issue 7, Page 1002-1017, July 2023., 2023
Abstract The Summanen structure is located in Central Finland and is one of Finland's 12 known meteorite impact structures. In 2017, the discovery of Summanen was based on numerous shatter cone boulders with planar deformation features (PDFs) and a circular electromagnetic anomaly, which is 2.6 km in diameter.
Satu Hietala, Jarkko Jokinen, Jouni Lerssi, Matti Niskanen, Lauri J. Pesonen, Jüri Plado   +5 more
wiley   +1 more source

1.88 Ga granitoids at Sorsakoski, Central Finland: A-type magmatism within the Raahe-Ladoga suture zone [PDF]

Bulletin of the Geological Society of Finland
Four quartz monzonite – granite intrusions forming the Sorsakoski granite lithodeme, are found within the Raahe-Ladoga suture zone in Central Finland. The prevailing potassium feldspar megacrystic quartz monzonites and granites form a bimodal association
Perttu Mikkola, Maija Pietilä, O. Tapani Rämö, Hannu Huhma   +3 more
doaj   +1 more source