A-type magmatism in the sierras of Maz and Espinal: A new record of Rodinia break-up in the Western Sierras Pampeanas of Argentina
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Colombo, Fernando; Baldo, Edgardo; Casquet, Cesar; Pankhurst, Robert J; Galindo, Carmen; Rapela, Carlos W; Dahlquist, Juan A.; Fanning, Christopher
Description
Two orthogneisses have been recognized in the sierras of Espinal and Maz (Western Sierras Pampeanas, NW Argentina) that were emplaced within a Grenvillian metasedimentary sequence. Microcline, plagioclase and quartz are the main rock-forming minerals, with accessory zircon, apatite-(CaF), magnetite, biotite (Fe/(Fe + Mg) = 0.88-0.91), ferropargasite (Fetotal/(Fetotal + Mg) = 0.88-0.89), titanite (with up to 1.61 wt% Y2O3) and an REE-rich epidote. REE-poor epidote and zoned garnet (Ca and...[Show more]
Collections | ANU Research Publications |
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Date published: | 2009 |
Type: | Journal article |
URI: | http://hdl.handle.net/1885/49435 |
Source: | Precambrian Research |
DOI: | 10.1016/j.precamres.2009.08.006 |
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01_Colombo_A-type_magmatism_in_the_2009.pdf | 1.71 MB | Adobe PDF | Request a copy |
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