Figure 3
From: Liquiñe-Ofqui’s fast slipping intra-volcanic arc crustal faulting above the subducted Chile Ridge
(A) Volcan Mate Grande (VMG: discovered during this study; 45° 35′ 28″ S, 73° 07′ 51″ W) has Hi-K calcalckaline magmas and (B–D) distinct geochemical characteristics compared with Volcan Maca and Cay complexes (32, 33; VMCC: typical SVZ magmas) and Volcan Hudson (VH; atypical SVZ magmas). VMG has distinctive La/Yb (C) and Dy/Yb (D) values, i.e. a completely different signature between VMG magmas and VH magmas. (E) Distribution (perpendicular distance (km) and normalised along-strike of the LOFZ) of stratovolcanoes and monogenetic cones from 41.5° to 47.5° S based on our mapping. (F,G) DEMs and mapping from the VMG, showing the 5 km by 4 km caldera, the young partially collapsed cone, the rock avalanche deposits (QRa), Quaternary alluvium (Qal), and the location of the main trace of the LOFZ that cuts this cone and displaces the rock avalanche deposit (likely triggered by a LOFZ earthquake/rupture) northward (i.e. dextrally) by ~ 170 ± 20 m. Base hillshade was generated with Esri ArcMap v.10.3 software (under fair terms of use, https://www.esri.com/en-us/legal/copyright-trademarks)39 using a digital elevation model downloaded from ALOS PALSAR Global Radar Imagery40 with 12.5 m resolution (https://asf.alaska.edu/data-sets/sar-data-sets/alos-palsar/).
