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Monzogranit

Infotaula de rocaMonzogranit
Tipusgranit Modifica el valor a Wikidata
Classificació de les roques ígnies plutòniques segons Streckeisen 1978. El monzogranit es troba al lloc 6a.

Els monzogranits són roques ígnies plutòniques considerades com a productes de cristal·lització fraccionada terminal. Els monzogranits són característicament roques fèlsiques (SiO₂ 20-60%, and FeO + MgO + TiO₂ < 2.4), lleugerament peralumínics (Al₂O₃/ (CaO + Na₂O + K₂O) = 0.98–1.11) i que poden contenir ilmenita, esfena, apatita i zircó com a minerals accessoris.[1] Tot i que el rang composicional dels monzogranits és relativament estret, s'ha definit una diferenciació entre els diferents tipus tenint en compte el contingut de biotita i plagioclasa. En aquest cas els monzogranits es divideixen entre monzogranits magnesio-potàssics i monzogranits ferro-potàssics.[2]

Referències

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  1. Fagiono, M. R., F. E. Nullo, J. E. Otamendi, et al. (2002) "Geología, petrología y mineralogía del granito Inti Huasi, sur de la sierra de Comechingones, Córdoba." Rev. Asoc. Geol. Argent., oct./dic. 2002, vol. 57, no. 4, p. 389–403. ISSN 0004-4822.
  2. Green, Michael Godfrey. (2001) "Early Archaean Crustal Evolution: Evidence from ~3.5 Billion Year Old Greenstone Successions in the Pilgangoora Belt, Pilbara Craton, Australia." dissertation, School of Geosciences, Division of Geology and Geophysics, University of Sydney
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Monzogranit
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