Results 61 to 70 of about 982 (167)

Nature secondary quartzites of the island Bol’shoy Tyuters (Gulf of the Finland, Russia)

Литосфера, 2017
Territory Baltic shield is well understood and the identification of innovative geological formations rare stroke of luck. Thanks to the Russian Geographical Society in the summer of 2015 an integrated expedition to study the nature of the little-known ...
Evgenii N. Terekhov, Aleksandr B. Makeev, Vsevolod Yu. Prokofiev, Tamara F. Shcherbakova, Aleksandr S. Baluev, Boris V. Ermolaev   +5 more
doaj   +1 more source

Rapakivi granite in St. Petersburg: architecture and mineralogical-petrografical observations [PDF]

, 2016
Rapakivi granites are a widely used in architectural ensembles of St. Petersburg. The history and examples of their application from 1760s are here reviewed.
Bulakh, Andrey G., Panova, Elena G., Gavrilenko, Vladimir V.   +2 more
core   +1 more source

Rapakivi granites, S Greenland: hydrothermal alteration of igneous layering

, 1990
Igneous layering is developed in the Proterozoic rapakivi granite suite of South Greenland in an area on the south-easternmost coast of the island of Angnikitsoq. The layering at this locality is unusual in that it is defined by interstitial phases.
Harrison, TN, FINCH, A A, REAVY, R J, BROWN, P E, Reavy, RJ, Finch, Adrian Anthony, Brown, PE, HARRISON, T N   +7 more
core   +1 more source

The age of monzonites of the eastern part of the Korsun-Novomirgorod pluton (Ingul megablock of the USh)

Геофизический журнал, 2015
The article presents the results of monzonites research of the eastern part of Korsun-Novomirgorod pluton. The pluton is situated in the northwestern part of the Ingul megablock.
E. Shestopalova, L.M. Stepanyuk, T. Dovbush, I.N. Kotvitskaya   +3 more
doaj   +1 more source

Rapakivi Texture in the Mount Scott Granite, Wichita Mountains, Oklahoma

, 1996
Mount Scott Granite is the largest recognized A-type sheet granite of the Cambrian Wichita Igneous Province, southwestern Oklahoma. Despite surprising compositional uniformity over a substantial areal extent, Mount Scott Granite can be subdivided into ...
Gilbert, M. Charles, Price, Jonathan D., Hogan, John Patrick   +2 more
core   +1 more source

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

Geologica 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   +1 more source

Natural stone assessment with ground penetrating radar [PDF]

Estonian Journal of Earth Sciences, 2008
The usability of ground penetrating radar in quality assessment of natural stone deposits was tested in porphyritic granite and soapstone. The main interest was to evaluate how the soundness, fracturing, and physical defects can be studied with the ...
Luodes, Hannu
doaj  

Kinetically driven successive sodic and potassic alteration of feldspar. [PDF]

Nat Commun, 2021
Duan G, Ram R, Xing Y, Etschmann B, Brugger J, Brugger J.   +5 more
europepmc   +1 more source

Rapakivi microstructure in a 3.3 Ga rhyolite

Mineralogy and Petrology
Abstract The rapakivi microstructure has been widely studied in granites, but few investigations have focused on volcanic rocks, especially Paleoarchean types. The Contendas Rhyolite (CR), approximately 3.3 billion years old, is a rare example of a Paleoarchean volcanic rock with preserved rapakivi microstructure.
Flávia Braga de Oliveira, Leonardo Lagoeiro, Gilberto Álvares da Silva, Stefano Albino Zincone, Eliana Marinho Branches Farias, Leonardo Martins Graça   +5 more
openaire   +1 more source

MAGMATISMO DO BATÓLITO RAPAKIVI RIO BRANCO, SW DO CRÁTON AMAZÔNICO (MT) [PDF]

, 2012
O Batólito Rapakivi Rio Branco ocorre na porção sudoeste do Cráton Amazônico no estado do Mato Grosso, inserido no Domínio Tectônico Cachoeirinha, parte da Província Geocronológica Rio Negro-Juruena.
ARAÚJO, Larissa Marques Barbosa de, GODOY, Antonio Misson   +1 more
core   +1 more source