Geochemistry of the Active Azufre--Planchon--Peteroa Volcanic Complex, Chile (35 15'S): Evidence for Multiple Sources and Processes in a Cordilleran Arc Magmatic System

Geochemistry of fluid discharges from Peteroa volcano (Argentina-Chile) in 2010–2015: Insights into compositional changes related to the fluid source region(s)

“…The model proposed in this study is also consistent with the trace element patterns of the dacitic volcanic products pertaining to PPAVC, which indicates an evolution in shallow crustal reservoirs with a remarkable assimilation of upper crust components (Tormey et al, 1995).…”

“…a relatively shallow batch likely affected by a significant crustal contamination, whose contribution to the fluid emissions was maximum in 2012. The occurrence of the two magma batches is supported by the basaltic and, secondarily, dacitic volcanic products recognized at PPAVC (Tormey et al, 1995). According to this hypothesis, in 2014-2015, i.e.…”

“…The Pleistocene-Holocene PPAVC lies on Upper Jurassic to Cretaceous continental and marine sediments (limestone, conglomerates, sandstones and gypsum sequences), pyroclastic rocks, and basaltic to rhyolitic lava flows which are locally intruded by Middle Tertiary dioritic to granodioritic plutons (Tormey et al, 1989(Tormey et al, , 1995Naranjo et al, 1999;Naranjo and Haller, 2002). These rock formations are variably folded and thrusted, given the occurrence of NNE-oriented reverse faults pertaining to the Malargüe fold-and-thrust belt (Giambiagi et al, 2003).…”

“…Its activity is characterized by basaltic andesite to andesitic lava flows and basaltic andesite to dacitic pyroclastic flows, surge and fall deposits. According to Tormey et al (1995), the volcanic products of PPAVC evolved from basalts and, secondarily, dacites (AzufrePlanchón) sourced from relatively moderate-pressure (4 to 8 kbar), to andesite (Peteroa), produced by magma mixing processes at relatively shallow depth. NNE-oriented reverse faults, developed in a compressive regime caused by the Malargüe fold and thrust belt (Ramos et al 2004), controlled the spatial orientation of PPAVC (Cembrano and Lara, 2009), as well as the location of the thermal manifestations (e.g., hot springs, bubbling pools, mud pools, fumaroles, steaming grounds) recognized at N, E and SE of the volcanic complex .…”

Arc Crust-Magma Interaction in the Andean Southern Volcanic Zone from Thermobarometry, Mineral Composition, Radiogenic Isotope and Rare Earth Element Systematics of the Azufre-Planchon-Peteroa Volcanic Complex, Chile

“…Segments of the SVZ (CSVZ, TSVZ, and NSVZ) are plotted against their latitude locations. Data sources were collected from Hickey-Vargas et al 1984, 1986Lopez-Escobar et al 1995;Tormey et al 1991;Rodriguez et al 2007;Davidson and Dungan et al 1987;Hickey-Vargas et al unpublished;Sun thesis, 2001 Figure 2.8: Neodymium isotopic data of basalt and basaltic andesites magmas from many centers along the SVZ volcanic front. Segments of the SVZ (CSVZ, TSVZ, and NSVZ) are plotted against their latitude locations.…”