Mantle Xenoliths from Huanul Volcano (Central-West Argentina): A Poorly Depleted Mantle Source under Southern Payenia

BERTOTTO, GUSTAVO W.; MAZZUCCHELLI, MAURIZIO; GIOVANARDI, TOMMASO; CONCEIÇAO, ROMMULO V.; ZANETTI, ALBERTO; SCHILLING, MANUEL E.; BERNARDI, MAURO I.; PONCE, ALEXIS D.; JALOWITZKI, TIAGO; GERVASONI, FERNANDA; CIPRIANI, ANNA

Geosciences (Switzerland)

MDPI

Lugar: Basilea; Año: 2022 vol. 12

Huanul is a shield volcano with several lava flows hosting mantle xenoliths erupted during the Pleistocene (0.84 ± 0.05 Ma). It is located in the southern part of the Payenia Volcanic Province, which is among the largest Neogene-Quaternary volcanic provinces of South America. The volcanism here has been ascribed as the northernmost expression of the back-arc volcanism of the Andean Southern Volcanic Zone. We present the first petrographic and mineral chemistry study of mantle xenoliths collected from Huanul lavas with the aim of reconstructing directly the mantle source of the Payenia Volcanic Province. Xenoliths are commonly small (