Results 91 to 100 of about 479 (172)

Magmatismo rapakivi en la cuenca media del río Inírida, departamento de Guainía, Colombia. [PDF]

, 2016
In eastern Colombia, the crystalline basement is intruded by several anorogenic granites of Mesoproterozoic age. One of these anorogenic granitic intrusions outcrops in the area of the indigenous Matraca and Dantacommunities, at the middle Inirida River ...
Frantz, Jose Carlos, Bonilla Perez, Amed, Cramer, Thomas, Charão Marques, Juliana, Franco Victoria, José Alejandro, Amaya Perea, Zeze   +5 more
core  

Magmatic evolution of topaz-bearing granite stocks within the Wiborg rapakivi granite batholith

, 2007
This study brings new insights into the magmatic evolution of natural F-enriched peraluminous granitic systems. The Artjärvi, Sääskjärvi and Kymi granite stocks within the 1.64 Ga Wiborg rapakivi granite batholith have been investigated by petrographic ...
Lukkari, Sari
core  

A propos des feldspaths potassiques du granite d'Azegour (Maroc)

, 1957
Les feldspaths potassiques du granite d'Azegour sont de l'orthose partiellement transformée en microcline. Des comparaisons avec les granites post-cambriens, qui sont généralement à orthose, les granites précambriens tardi-tectoniques de Sierra Leone à ...
Marmo, Vladimir, Permingeat, François
core   +1 more source

The geochemistry of the Sorvik granite - a TIB-1 granite

, 2008
The Sorvik granite occurs as rounded massifs in the Revsund granite in central Sweden. The rock is medium-grained with rounded quartz crystals ('drop quartz') and occasional, sometimes albiterimmed megacrysts of K-feldspar. It is a faintly peraluminous 1-
Lindh, Anders
core   +1 more source

Geochemistry and tectonic significance of late Paleoproterozoic A-type granites along the southern margin of the North China Craton. [PDF]

Sci Rep, 2020
Wang Y, Yang YZ, Siebel W, Zhang H, Zhang YS, Chen F.   +5 more
europepmc   +1 more source

Experimental determination of tritium matrix diffusion coefficient in the samples of rapakivi-like-granite

, 2012
Коэффициент эффективной (матричной) диффузии и эффективная пористость являются ключевыми параметрами для описания диффузионного массопереноса загрязняющих компонентов в низкопроницаемой кристаллической породе.
Олександрова, Н.В., Кашевич, Е.С., Бондарь, Ю.В., Скворцов, В.В.   +3 more
core  

Mesoproterozoic rapakivi granites of the Rondonia Tin Province, southwestern border of the Amazonian craton, Brazil - I. Reconnaissance U-Pb geochronology and regional implications

, 1999
Rapakivi granites and associated mafic and ultramafic rocks in the Rondonia Tin Province, southwestern Amazonian craton, Brazil were emplaced during six discrete episodes of magmatism between ca 1600 and 970 Ma. The seven rapakivi granite suites emplaced
Bettencourt, J. S., Leite, W. B., Tosdal, R. M., Payolla, B. L.   +3 more
core   +1 more source

Accumulation of Elements in Biodeposits on the Stone Surface in Urban Environment. Case Studies from Saint Petersburg, Russia. [PDF]

Microorganisms, 2020
Sazanova Nee Barinova KV, Zelenskaya MS, Manurtdinova VV, Izatulina AR, Rusakov AV, Vlasov DY, Vlasov DY, Frank-Kamenetskaya OV.   +7 more
europepmc   +1 more source

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

Vestnik 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., Skublov S. G., Berezin A. V., Petrov D. A.   +3 more
doaj   +1 more source

Combined geophysical and hydraulic methods for 3D mapping of fractures and siting rock caverns in granite

, 1988
In order to determine the most suitable location for a set of rock caverns, the fracturing of a rapakivi granite block is studied in three dimensions.
Pirhonen, Veijo
core   +1 more source