Results 131 to 140 of about 343 (176)

Geochemical features of carbonatites of the Fennoscandian shield

Doklady Earth Sciences, 2015
The petrochemistry of carbonatites of three formation types were studied: (1) ultrahigh-pressure garnet-containing carbonatites (UHPC) of the Caledonian sheet (Tromso, Norway); (2) rocks of the carbonatite—alkaline—ultrabasic Kovdor massif (the Kola Peninsula); and (3) rocks of the carbonatite—alkaline—gabbroid Tikshozero massif (north of Karelia). The
Yu. B. Shapovalov, N. S. Gorbachev, A. V. Kostyuk, D. M. Sultanov   +3 more
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Thermomechanical lithospheric structure of the central Fennoscandian Shield

Physics of the Earth and Planetary Interiors, 2000
Abstract The deep seismic sounding (DSS) profiles BALTIC, including its southern continuation, the Sovetsk–Kohtla–Jarve (SKJ) profile, SVEKA, the northern part of BABEL, POLAR, FENNIA and Pechenga–Kovdor–Kostomuksha, were used in studying the present-day thermomechanical structure of the central Fennoscandian Shield.
P. Kaikkonen, K. Moisio, M. Heeremans
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Heat flux and seismicity in the Fennoscandian Shield

Physics of the Earth and Planetary Interiors, 2001
Abstract The regional thermal regime in the Fennoscandian Shield is outlined, and the consequent rheological structure is analysed from the Kola Orogen to the Sorgenfrei–Tornquist zone. Moho temperatures and the heat flux from the mantle are typical of cratonic areas. The deep thermal field shows a cold root in the north-eastern sector.
PASQUALE, VINCENZO, VERDOYA, MASSIMO, CHIOZZI P.   +2 more
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Mantle xenoliths and thick lithosphere in the Fennoscandian Shield

Physics and Chemistry of the Earth, Parts A/B/C, 2003
We applied data on kimberlite-hosted mantle xenoliths from Lahtojoki, Kaavi, in eastern Finland for thermal, rheological and seismic velocity modeling of the lithospheric mantle in the central part of the Fennoscandian Shield. We also report petrographic evidence for decrepitated fluid inclusions indicating a presence of fluids in the upper mantle. Our
I.T Kukkonen, K.A Kinnunen, P Peltonen
openaire   +1 more source

Evidence for bacterially generated hydrocarbon gas in Canadian shield and fennoscandian shield rocks

Geochimica et Cosmochimica Acta, 1993
Hydrocarbon-rich gases found in crystalline rocks on the Canadian and Fennoscandian shields are isotopically and compositionally similar, suggesting that such gases are a characteristic feature of Precambrian Shield rocks. Gases occure in association with saline groundwaters and brines in pressurized “pockets” formed by sealed fracture systems within ...
B. Sherwood Lollar, S.K. Frape, P. Fritz, S.A. Macko, J.A. Welhan, R. Blomqvist, P.W. Lahermo   +6 more
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Major Palaeoproterozoic shear zones of the central Fennoscandian Shield

Precambrian Research, 1993
Abstract Employing two recently studied crustal-scale shear zones as type examples, this paper summarizes the major Palaeoproterozoic (Svecokarelian) shear tectonics of the central Fennoscandian Shield and demonstrates that this part of the Shield was not as stable during the Svecokarelian Orogeny as commonly assumed.
A. Kärki, K. Laajoki, J. Luukas
openaire   +1 more source

Deep life in Fennoscandian Shield

2014
The continental earth crust contains regions of very different age and composition including crystalline rocks, metamorphic systems, sedimentary basins and organic deposits, and magmatic intrusions. Throughout the crust, fluids are the principal agents in transporting and focusing Earth's energy and mineral resources.
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Thermal history of impact melt rocks in the Fennoscandian shield

Contributions to Mineralogy and Petrology, 1975
Shock-melted rocks from the Fennoscandian shield commonly contain fragments of quartz which appear to represent paramorphs of quartz after lechatelierite and, therefore indicate very high melt temperatures, at or above 1700 °C.
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The origin of the Paleoproterozoic belt (northeastern Fennoscandian Shield). Reply

Canadian Journal of Earth Sciences, 1998
I thank Dr. V. Melezhik and Dr. B. Sturt for their comments on my paper published in the Canadian Journal of Earth Sciences (Smolkin 1997). I am ready to continue constructive discussion on the questions of the genesis of Paleoproterozoic magmatic complexes of the Kola region (northwestern Russia) that host sulfide, chromite, and titanomagnetite ore ...
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Fennoscandian Shield

2023
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