Ferropyrosmalite-bearing fluid inclusions in the North Patagonian Andes metasedimentary basement, Argentina: A record of post-metamorphic metasomatism

SOSA, GRACIELA M.; VAN DEN KERKHOF, ALFONS; ORIOLO, SEBASTIÁN

Congreso; European Current Research on Fluid and Melt Inclusions; 2019

The Paleozoic basement of the North Patagonian Andes, south of the Nahuel Huapi Lake, comprises paragneisses and schists with subordinate intercalations of amphibolites, meta-rhyolites, felsic orthogneisses and foliated intrusions. The timing of metamorphism is constrained at ca. 390-300 Ma by EPMA Th-U-Pb monazite ages. Besides the basement, large Mesozoic and Cenozoic granitoid intrusions and volcano-sedimentary rocks occur.