NDLI: Geología y petrología del granito tres cerritos, extremo meridional de la sierra de Quilmes y su relación con el magmatismo devónico-carbonífero de las sierras Pampeanas

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Geología y petrología del granito tres cerritos, extremo meridional de la sierra de Quilmes y su relación con el magmatismo devónico-carbonífero de las sierras Pampeanas

Content Provider	Semantic Scholar
Author	Nagle, Ana E. Acosta López, Juan Parra
Copyright Year	2014
Abstract	Geolog y and petrolog y of Tres Cerritos granite, southern extreme of the Quilmes range, and its relathionship with the Devonian-Carboniferous magmatism of the Pamepean Ranges Tres Cerritos granite is located in the extreme southern of Quilmes range, Catamarca province, in the Sierras Pampeanas Septentrionales. The metamorphic basement is composed of low to medium grade schists belonging to Tolombon Complex. It presents thermal metamorphism with development of porfiroblasts of cordierite and biotite. The Tres Cerritos granite crops out in two sectors, one more extensive, with an area of 6 Km 2 of surface, with its major axis of 4 Km of course submeridional, and other smaller, outcropping to west of study zone, of 1,9 km long by 250 m wide. Compositionally varies between sienogranite and monzogranite and presents three facies: porfhiric biotitic, porfiric moscovitic and equigranular moscovitic. Geochemically is a calc-alkaline granite, peraluminous, rich in potassium. According datings K / Ar would this granite top Carboniferous age. The petrological, geochemical and geochronological characteristics are similar to that of the devonian-carboniferous intrusives of the Sierras Pampeanas of Catamarca, La Rioja, Cordoba and San Luis, so the Granite Tres Cerritos could be part of a post-orogenic or intraplate large magmatic event of regional extension that affected the Sierras Pampeanas during the Devonian-Carboniferous.
Starting Page	434
Ending Page	443
Page Count	10
File Format	PDF HTM / HTML
Volume Number	71
Alternate Webpage(s)	http://ppct.caicyt.gov.ar/index.php/raga/article/viewFile/3366/4354
Alternate Webpage(s)	http://www.scielo.org.ar/pdf/raga/v71n3/v71n3a11.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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