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Early Carboniferous sub- to mid-alkaline magmatism in the Eastern Sierras Pampeanas, NW Argentina: A record of crustal growth by the incorporation of mantle-derived material in an extensional setting

Alasino, Pablo H.; Dahlquist, Juan A.; Pankhurst, Robert J; Galindo, Carmen; Casquet, Cesar; Rapela, Carlos W; Larrovere, M.A.; Fanning, Christopher

Description

A recently discovered granitic intrusion at Cerro La Gloria in western Sierra de Famatina (NW Argentina) is representative of sub- to mid-alkaline Carboniferous magmatism in the region. The main rock type consists of microcline, quartz and plagioclase, with amphibole, magnetite, ilmenite, biotite, epidote, zircon, allanite and sphene as accessory minerals. We report a U-Pb zircon SHRIMP age for the pluton of 349±3Ma (MSWD=1.1), i.e., Tournaisian. Whole-rock chemical composition and Nd isotope...[Show more]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
URI: http://hdl.handle.net/1885/52411
Source: Gondwana Research
DOI: 10.1016/j.gr.2011.12.011

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