Fluid inclusions in cavity quartz crystals in rapakivi from Luumäki, southeastern Finland [PDF]
Bulletin of the Geological Society of Finland, 1991 Fluid inclusions in selected cavity quartz crystals in rapakivi granite from Luumäki, southeastern Finland, were studied by microthermometric methods.
M. Poutiainen
doaj +2 more sources
Cerussite from even-grained rapakivi, Saltvik, Åland Islands, SW Finland [PDF]
Bulletin of the Geological Society of Finland, 1988 Abstract Anisotropy of magnetic susceptibility (AMS) studies were carried out in two areas in Finland: the Ruotsinpyhtaa intrusion within the Wiborg rapakivi granite batholith and the Saltvik intrusions within the Aland rapakivi granite batholith. The main aim of this study was to understand the emplacement history of these mid-Proterozoic rapakivi ...
K. Lindqvist, V. Suominen
doaj +2 more sources
Layering in rapakivi granite, SW Finland [PDF]
Bulletin of the Geological Society of Finland, 1974 Layering in rapakivi granite occurs locally in the islet Söderören, Åland, SW Finland. The layering consists of 3—5 cm thick, rhythmically repeated layers with high concentrations of biotite, hornblende, allanite and olivine.
C. Ehlers
doaj +3 more sources
Phanerozoic veins of galena in the Åland rapakivi area, southwestern Finland [PDF]
Bulletin of the Geological Society of Finland, 1979 Some minor galena mineralizations are in part associated with clastic dykes of Cambrian sandstone in the Aland rapakivi area. Galena also occurs disseminated in greisen-type mineralizations.
L. Bergman, B. Lindberg
doaj +2 more sources
Geologia e Geoquímica do Batólito Rapakivi Rio Branco, SW do Craton Amazônico - MT [PDF]
Geologia USP. Série Científica, 2007 O Batólito Rapakivi Rio Branco está inserido no Domínio Tectônico Cachoeirinha, parte da Província GeocronológicaRio Negro-Juruena, localizado na porção sudoeste do Craton Amazônico em Mato Grosso.
Larissa Marques Barbosa de Araújo-Ruiz +4 more
doaj +3 more sources
Large Igneous Provinces (LIPs) and Anoxia Events in “The Boring Billion”
Geophysical Monograph Series, Page 449-486., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Shuan‐Hong Zhang +4 more
wiley +1 more source
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
doaj +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
doaj +1 more source
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
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
wiley +1 more source