Results 21 to 30 of about 3,709 (226)

Early-paleozoic rapakivi-textured granite from the North Qinling (Central China): implications for crust–mantle interactions in a post-collisional setting [PDF]

open access: hybridMineralogy and Petrology
Rapakivi granite is characterized by its unique structure, which has important implications for tectonic settings, magmatic processes, and crust–mantle interactions.
Fenhong Luo, Hujun Gong, Hang Liu
openalex   +2 more sources

Surface weathering of rapakivi granite outcrops – implications for natural stone exploration and quality evaluation [PDF]

open access: greenEstonian Journal of Earth Sciences, 2008
Implications of surface weathering of rapakivi granite outcrops for natural stone evaluation were studied in the Wiborg rapakivi granite batholith in southeastern Finland.
Härmä, Paavo, Selonen, Olavi
doaj   +1 more source

Fluid inclusions in cavity quartz crystals in rapakivi from Luumäki, southeastern Finland [PDF]

open access: diamondBulletin 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

Geochemical characterization of Gubanovskaya intrusion of rapakivi granites (Wiborg massif)

open access: yesVestnik MGTU
The paper presents new data on geology and composition of rapakivi granites of Gubanovskaya intrusion (Wiborg massif). Petrographic and geochemical characteristics of rapakivi granites of the second (ovoid) and third (trachytoid) phases of intrusion, as ...
Rogova I. V.   +3 more
doaj   +2 more sources

Layering in rapakivi granite, SW Finland [PDF]

open access: yesBulletin 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

Tectonic significance of Late Precambrian calc-alkaline and alkaline magmatism in Saint Katherina Area, Southern Sinai, Egypt [PDF]

open access: yesGeologica Acta, 2007
Two magmatic rock suites are distinguished in the Late Precambrian basement of the Southern Sinai (NW Arabian-Nubian Shield, Egypt), namely (a) a calc-alkaline suite, and (b) an alkaline suite.
M.K. Azer
doaj   +5 more sources

Mesoproterozoic Strike-Slip Faulting within the Åland Rapakivi Batholith, Southwestern Finland

open access: yesTektonika
Paleostress inversion analysis of outcrop data from brittle fault structures within the Mesoproterozoic 1.58 Ga Åland rapakivi granite, southwestern Finland, revealed two separate strike-slip faulting stages. Stage 1 is dominated by dextral slip along E–
Nicklas Nordbäck   +5 more
doaj   +2 more sources

GEOLOGIA, GEOQUIMICA E QUIMICA MINERAL DOS STOCKS GRANÍTICOS RAPAKIVI CAMPINA DO VEADO E SANTA BLANDINA, SUDOESTE DO ESTADO DE SÃO PAULO

open access: diamondGeosciences = Geociências, 2021
Os stocks graníticos Campina do Veado e Santa Blandina localizam-se na região sudoeste do estado de São Paulo, no município de Nova Campina, intrusivos em rochas da sequência metavulcanossedimentares do Grupo Itaiacoca.
Antônio Misson Godoy   +3 more
openalex   +3 more sources

Cerussite from even-grained rapakivi, Saltvik, Åland Islands, SW Finland [PDF]

open access: yesBulletin 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

Clinopyroxene episyenites in a Proterozoic rapakivi granite, SE Finland — recrystallization textures, mass transfer and implications for the petrology of A-type granite complexes [PDF]

open access: hybridMineralogy and Petrology, 2019
Na-metasomatic augite and aegirine-augite episyenites are hosted by subalkaline amphibole granites in the 1.644 Ga Suomenniemi rapakivi granite complex, southeastern Finland.
Einari Suikkanen   +3 more
openalex   +2 more sources

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