Results 11 to 20 of about 8,120 (216)

The age and origin of the Vaasa migmatite complex revisited [PDF]

Bulletin of the Geological Society of Finland, 2014
The origin of the Vaasa migmatite complex was studied by using whole-rock Sm-Nd and zircon Lu-Hf and U-Pb data in conjunction with whole-rock major and trace element geochemistry.
E. Suikkanen, H. Huhma, M. Kurhila, Y. Lahaye   +3 more
doaj   +1 more source

Tectono-metamorphic evolution and timing of the melting processes in the Svecofennian Tonalite-Trondhjemite Migmatite Belt: An example from Luopioinen, Tampere area, southern Finland [PDF]

Bulletin of the Geological Society of Finland, 1999
The Svecofennian Orogen is in southern Finland characterized by two major migmatite belts. These are the so-called Granite Migmatite Belt, in which Kfs-rich leucosomes predominate, and the Tonalite-Trondhjemite Migmatite Belt, which is characterized by ...
H. Mouri, K. Korsman, H. Huhma
doaj   +1 more source

Primary crustal melt compositions: Insights into the controls, mechanisms and timing of generation from kinetics experiments and melt inclusions [PDF]

, 2017
We explore the controls, mechanisms and timing of generation of primary melts and their compositions, and show that the novel studies of melt inclusions in migmatites can provide important insights into the processes of crustal anatexis of a particular ...
Acosta-Vigil, Antonio, Bartoli, Omar, Buick, Ian, Cesare, Bernardo, Hermann, J\ue3\ub6rg, London, David, Morgan, George B.   +6 more
core   +1 more source

Formation mechanism of the Vaasa Batholith in the Fennoscandian shield: Petrographic and geochemical constraints [PDF]

Bulletin of the Geological Society of Finland, 2012
The ~1.88 Ga Vaasa Batholith in western Finland is a large granitoid area (8 000 km2) with gradational contacts against the garnet- and cordierite-bearing diatexite and metatexite migmatites of the Pohjanmaa Belt.
H. Mäkitie, P. Sipilä, H. Kujala, A. Lindberg, A. Kotilainen   +4 more
doaj   +1 more source

The corridor of mineralization in the California gold district, in the Santander Department of Colombia

Journal of the Geological Survey of Brazil, 2021
In the Santander Massif of the Eastern Cordillera of Colombia, intense Pliocene to Holocene sulfide-rich gold mineralization occurs in a six kilometers long section of the La Baja fault zone, where it crosses partially migmatized gneisses and intrusions ...
Wilson Scarpelli
doaj   +1 more source

U-Pn geochronology of deformed metagranites in central Sutherland, Scotland: evidence for widespread late Silurian metamorphism and ductile deformation of the Moine Supergroup during the Caledonian orogeny [PDF]

, 2003
Within the Caledonides of central Sutherland, Scotland, the Neoproterozoic metasedimentary rocks of the Moine Supergroup record NW-directed D2 ductile thrusting and nappe assembly, accompanied by widespread tight-to-isoclinal folding and amphibolite ...
Friend, C.R.L., Kinny, P.D., Kocks, H., Paterson, B.A., Rogers, G, Strachan, R.A.   +5 more
core   +1 more source

Petrology, geochemistry, and geochronology of the leucogranites in southernmost Finland [PDF]

Bulletin of the Geological Society of Finland
In the southernmost part of the Svecofennian province in Finland, leucogranites and migmatites stemming from both igneous and sedimentary protoliths reflect the complex magmatic history of the Svecofennian orogeny between 1.89 and 1.82 Ga.
Anna Saukko, Kaisa Nikkilä, Olav Eklund, Sören Fröjdö, Markku Väisänen   +4 more
doaj   +1 more source

Intracratonic Palaeoproterozoic granitoids in northern Finland: Prolonged and episodic crustal melting events revealed by Nd isotopes and U-Pb ages on zircon [PDF]

Bulletin of the Geological Society of Finland, 2007
Zircons from twelve Palaeoproterozoic granitoids from the Central Lapland Granitoid Complex (CLGC) and from the Hetta Complex (HC) in northern Finland were dated using the NORDSIM ion microprobe.
N. Ahtonen, P. Hölttä, H. Huhma
doaj   +1 more source

The Lomagundi-Jatuli carbon isotopic event recorded in the marble of the Tandilia System basement, Río de la Plata Craton, Argentina [PDF]

, 2019
The “Lomagundi-Jatuli event” corresponds to the most important δ13C positive anomaly (≥5‰) globally reported in Palaeoproterozoic marine carbonates (between ∼2.30 and 2.06 Ga).
Ballivian Justiniano, Carlos Alberto, Cingolani, Carlos Alberto, Etcheverry, Ricardo Oscar, Lajoinie, Maria Florencia, Lanfranchini, Mabel Elena, Recio, C., Sial, A.N.   +6 more
core   +1 more source

Three-dimensional distribution of primary melt inclusions in garnets by X-ray microtomography [PDF]

, 2018
open6X-ray computed microtomography (X-mu CT) is applied here to investigate in a non-invasive way the three-dimensional (3D) spatial distribution of primary melt and fluid inclusions in gamets from the metapeitic enclaves of El Hoyazo and from the ...

core   +1 more source