Results 171 to 180 of about 3,972 (218)

SEISMIC ZONING OF FENNOSCANDIAN SHIELD

ISET Journal of Earthquake Technology, 1974
The major earthquake zones of the world are found in (i) the Circum-Pacific belt, (ii) the Alpine-Himalayan belt and (iii)the mid-oceanic ridges of the Atlantic, Indian and Pacific oceans. These earthquake-belts which cover large segments of the Earth, have been studied in detail by various workers, but little attention has been paid to earthquake ...
L. S. SRIVASTAVA, M. A. SELLEVOLL
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Metallogeny of gold in the Fennoscandian Shield

Mineralium Deposita, 1990
Gold occurs in a number of different ore types in the Fennoscandian Shield ranging in age from Late Archean to Late Proterozoic. Until recently, the metal was exploited primarily as a byproduct in volcanogenic massive sulphide deposits but during the 1980s more gold mines have been opened than during any other episode in the mining history of northern ...
G. Gaál, K. Sundblad
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The Archaean nucleus of the Fennoscandian (Baltic) Shield

Geological Society, London, Memoirs, 2006
abstract Archaean supracrustal complexes, known in the Fennoscandian (Baltic) Shield, are described and discussed by analysing the time sections 3.1-2.9, 2.9-2.75 and 2.75-2.65 Ga. Data on granitoid complexes, interrelated in time and space, and evidence for Archaean metamorphic events are classified and presented briefly.
A. I. Slabunov, S. B. Lobach-Zhuchenko, E. V. Bibikova, P. Sorjonen-Ward, V. V. Balangansky, O. I. Volodichev, A. A. Shchipansky, S. A. Svetov, V. P. Chekulaev, N. A. Arestova, V. S. Stepanov   +10 more
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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
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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
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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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