Results 121 to 130 of about 759 (173)
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Rapakivi granites and related rocks: an introduction

Precambrian Research, 1999
Abstract This article is an introductory chapter for the proceedings of the last, seventh, meeting of the International Geological Correlation Programme (IGCP) Project 315 “Correlation of Rapakivi Granites and Related Rocks on a Global Scale”, 1991–1996.
O T Ramó, I Haapala
exaly   +2 more sources

One hundred years of rapakivi granite

Mineralogy and Petrology, 1995
Rapakivi granites, recently redefined as A-type granites showing rapakivi texture at least in the larger batholiths, occur on all continents and presumably represent the most voluminous continental silicic intraplate magmatism on Earth. Most of the rapakivi granites are Proterozoic (mainly 1.0 to 1.7 Ga) but also Archean (2.8 Ga) and Phanerozoic (0.05 ...
O T Ramó, I Haapala
exaly   +2 more sources

Rapakivi granites in the geological history of the earth. Part 1, magmatic associations with rapakivi granites: Age, geochemistry, and tectonic setting

Stratigraphy and Geological Correlation, 2009
Rapakivi granites characteristic practically of all old platforms are greatly variable in age and irregularly distributed over the globe. Four types of magmatic associations, which include rapakivi granites, are represented by anorthosite-mangerite-charnockite-rapakivi granite, anorthosite-mangerite-rapakivi-peralkaline granite, gabbro-rapakivi granite-
A M Larin, Larin A M
exaly   +2 more sources

Rapakivi granites from Brazil and adjacent areas

Precambrian Research, 1999
Abstract A review of the rapakivi magmatism in Brazil and adjacent areas demonstrates that the dominantly felsic anorogenic complexes of the Amazonian craton can be considered as rapakivi suites. They are found in almost all provinces of the craton and are concentrated in the timespan covering the end of the Palaeoproterozoic until the beginning of ...
R Dall'Agnol
exaly   +2 more sources

Petrology and geochemistry of Late Triassic rapakivi-type granites in the Dupangling area, South China: Role of fluid-rock interaction in the origin of rapakivi texture [PDF]

open access: yesLithos, 2023
Rapakivi-type granites not only document magmatic processes but also archive subsolidus interactions between granitic rock and fluid, and thereby provide crucial information about fluid infiltration in the Earth's crust.
Xuan-Ce Wang, Xiao-Long Huang
exaly   +2 more sources

Rapakivi Texture in Rhyolite

Nature, 1969
RAPAKIVI texture has rarely been reported in volcanic rocks1. A notable example of a volcanic body with rapakivi texture is a Miocene rhyolite2 that has an exposure area of about 1/16 square mile near California State Highway 178 on the east flank of Rhodes Hill 1/4 mile west of the eastern boundary of Death Valley National Monument.
A. L. EHRREICH, R. E. WINCHELL
openaire   +1 more source

The Origin of Rapakivi Texture

Journal of Petrology, 1994
45124
Dempster, TJ, Jenkin, GRT, Rogers, G
openaire   +2 more sources

Bacterial weathering of rapakivi granite

Geomicrobiology Journal, 1981
Rapakivi granite samples were incubated with Pseudomonas aeruginosa culture solutions in order to elucidate the possible role of bacteria in rapakivi (crumbling stone) disintegration. SEM micrographs showed micromorphological alterations on the incubated rapakivi surface at 21 to 23°C for 20 days.
Antti Vuorinen   +3 more
openaire   +1 more source

The Genesis of the Rapakivi Granites

Geologiska Föreningen i Stockholm Förhandlingar, 1937
(1937). The Genesis of the Rapakivi Granites. Geologiska Foreningen i Stockholm Forhandlingar: Vol. 59, No. 4, pp. 503-524.
openaire   +1 more source

Rapakivi granite, anorthosite and charnockitic plutonism

Nature, 1978
THE close association of massive anorthosite and charnockitic granitic rocks is well documented1. Rare earth element (REE) investigations2–4 have indicated that the massive charnockite (mangerite) associated with anorthosite is not comagmatic with it but represents a distinct magma fraction.
F. H. HUBBARD, J. E. WHITLEY
openaire   +1 more source

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