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14 p, 6.0 MB Linkages between the southern Patagonia Pre-Permian basements : new insights from detrital zircons U-Pb SHRIMP ages from the Cerro Negro District / Permuy Vidal, C. (Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo) ; Moreira, P. (Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo) ; Guido, D. M. (Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo) ; Fanning, C. M. (The Australian National University. Research School of Earth Sciences)
The Patagonian basement rocks are dominated by Precambrian to Early Paleozoic metamorphic rocks intruded by Paleozoic granitoids. Recently discovered basement rocks in the Cerro Negro District are characterized mainly by quartz-muscovite-chlorite schists; the metamorphic grade reaches greenschist facies (biotite-garnet grade) with a regional S1 schistosity subparallel to the original sedimentary structure S0 and a secondary non-penetrative S2 foliation. [...]
2014 - 10.1344/105.000002082
Geologica acta, Vol. 12, Núm. 2 (June 2014) , p. 137-150  

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