Results 31 to 40 of about 3,709 (226)
Isotopic composition of pyterlite in Vyborg (Viipuri), Wiborg batholith, Russia [PDF]
Bulletin of the Geological Society of Finland, 2001 T. Rämö
doaj +4 more sources
Weathering in the Wyborg rapakivi area, southeastern Finland
Fennia: International Journal of Geography, 1985 Field survey of weathering sites in the Wyborg rapakivi area indicates that saprolites are far more common in the central part of the massif than in the marginal areas. Many till‑covered saprolites and parautochthonous crust‑tills prove the weathering to
Aimo Kejonen
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Migmatite and Rapakivi Granite in the South Finland
Journal of Geography (Chigaku Zasshi), 2006 Junzo Kasahara
openaire +3 more sources
A specialized topaz-bearing rapakivi granite and associated mineralized greisen in the Ahvenisto complex, SE Finland [PDF]
Bulletin of the Geological Society of Finland, 1991 The Ahvenisto rapakivi complex is a satellite northwest of the large Wiborg rapakivi batholith in Southeastern Finland. The rapakivi rocks are surrounded by rapakivi-age gabbros, anorthosites, monzodiorites and diabases.
P. Edén
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On the direction of remanent magnetization of the quartz porphyry dikes in SE Finland [PDF]
Bulletin of the Geological Society of Finland, 1986 Attempts are made to determine the direction of remanent magnetization of the rapakivi varieties belonging to the Wiborg (Viipuri) rapakivi massif and its satellites in the precambrian Baltic Shield. Hard and stable remanence was found only in the quartz
K.J. Neuvonen
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Hydrogeological Characterization of Crystalline Bedrock Using Borehole Magnetic Resonance
Groundwater, Volume 61, Issue 6, Page 793-815, November/December 2023., 2023 This study is one of the first to test the applicability of the borehole magnetic resonance (BMR) method in crystalline “hard rock” environment. The aim was to investigate whether the BMR measurements could constitute an effective method for investigating detailed permeability variations in the crystalline bedrock of the two study sites: Sakatti mining
Salla Eeva +7 more
wiley +1 more source
The Shahewan rapakivi-textured granite-quartz monzonite pluton, Qinling orogen, central China: Mineral composition and petrogenetic significance [PDF]
Bulletin of the Geological Society of Finland, 2002 The Mesozoic Shahewan pluton consists of four texturally different types of biotite-hornblende quartz monzonite. In the porphyritic types alkali feldspar occurs as euhedral or ovoidal megacrysts that are often mantled by one or more plagioclase shells ...
X. Wang, T. Wang, I. Haapala, X. Lu
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Earth Surface Processes and Landforms, Volume 48, Issue 10, Page 1956-1968, August 2023., 2023 In this paper, we link natural fractures with outcrop morphologies and apply the findings in understanding the glacial erosion signatures in crystalline rocks. Abstract This paper addresses the effect of fractures within crystalline bedrock on glacial erosion processes in fast flowing hard bed glacier environments. In particular, we examine (i) whether
Pietari Skyttä +7 more
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Journal of Geophysical Research: Solid Earth, Volume 128, Issue 4, April 2023., 2023 Abstract We analyze envelopes of 233 and 22 ML0.0 to ML1.8 earthquakes induced by two geothermal stimulations in the Helsinki, Finland, metropolitan area. We separate source spectra and site terms and determine intrinsic attenuation and the scattering strength of shear waves in the 3–200 Hz frequency range using radiative transfer based synthetic ...
Tom Eulenfeld +3 more
wiley +1 more source