Liquiñe-Ofqui’s fast slipping intra-volcanic arc crustal faulting above the subducted Chile Ridge

Abstract The southernmost portion of the Liquiñe-Ofqui fault zone (LOFZ) lies within the proposed slab window which formed due to oblique subduction of the Chile Ridge in Patagonia. Mapping of paleo-surface ruptures, offsets, and lithological separations along the master fault allowed us to constrai...

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Autores principales:	Gregory P. De Pascale, Melanie Froude, Ivanna Penna, Reginald L. Hermanns, Sergio A. Sepúlveda, Daniel Moncada, Mario Persico, Gabriel Easton, Angelo Villalobos, Francisco Gutiérrez
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e4e8b402e94d43c99dd40cfafae21203
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spelling	oai:doaj.org-article:e4e8b402e94d43c99dd40cfafae212032021-12-02T14:25:16ZLiquiñe-Ofqui’s fast slipping intra-volcanic arc crustal faulting above the subducted Chile Ridge10.1038/s41598-021-86413-w2045-2322https://doaj.org/article/e4e8b402e94d43c99dd40cfafae212032021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-86413-whttps://doaj.org/toc/2045-2322Abstract The southernmost portion of the Liquiñe-Ofqui fault zone (LOFZ) lies within the proposed slab window which formed due to oblique subduction of the Chile Ridge in Patagonia. Mapping of paleo-surface ruptures, offsets, and lithological separations along the master fault allowed us to constrain geologic slip rates for the first time with dextral rates of 11.6–24.6 mm/year (Quaternary) and 3.6–18.9 mm/year (Late-Cenozoic) respectively. We had trouble mapping the LOFZ in one local because of a partially collapsed and previously undiscovered volcanic complex, Volcan Mate Grande (VMG: 1,280 m high and thus Vesuvius-sized) that grew in a caldera also offset along the LOFZ and has distinct geochemistry from adjacent stratovolcanoes. Besides the clear seismic and volcanic hazard implications, the structural connection along the main trace of the fast slipping LOFZ and geochemistry of VMG provides evidence for the slab window and insight into interplay between fast-slipping crustal intra-arc crustal faults and volcanoes.Gregory P. De PascaleMelanie FroudeIvanna PennaReginald L. HermannsSergio A. SepúlvedaDaniel MoncadaMario PersicoGabriel EastonAngelo VillalobosFrancisco GutiérrezNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Gregory P. De Pascale Melanie Froude Ivanna Penna Reginald L. Hermanns Sergio A. Sepúlveda Daniel Moncada Mario Persico Gabriel Easton Angelo Villalobos Francisco Gutiérrez Liquiñe-Ofqui’s fast slipping intra-volcanic arc crustal faulting above the subducted Chile Ridge
description	Abstract The southernmost portion of the Liquiñe-Ofqui fault zone (LOFZ) lies within the proposed slab window which formed due to oblique subduction of the Chile Ridge in Patagonia. Mapping of paleo-surface ruptures, offsets, and lithological separations along the master fault allowed us to constrain geologic slip rates for the first time with dextral rates of 11.6–24.6 mm/year (Quaternary) and 3.6–18.9 mm/year (Late-Cenozoic) respectively. We had trouble mapping the LOFZ in one local because of a partially collapsed and previously undiscovered volcanic complex, Volcan Mate Grande (VMG: 1,280 m high and thus Vesuvius-sized) that grew in a caldera also offset along the LOFZ and has distinct geochemistry from adjacent stratovolcanoes. Besides the clear seismic and volcanic hazard implications, the structural connection along the main trace of the fast slipping LOFZ and geochemistry of VMG provides evidence for the slab window and insight into interplay between fast-slipping crustal intra-arc crustal faults and volcanoes.
format	article
author	Gregory P. De Pascale Melanie Froude Ivanna Penna Reginald L. Hermanns Sergio A. Sepúlveda Daniel Moncada Mario Persico Gabriel Easton Angelo Villalobos Francisco Gutiérrez
author_facet	Gregory P. De Pascale Melanie Froude Ivanna Penna Reginald L. Hermanns Sergio A. Sepúlveda Daniel Moncada Mario Persico Gabriel Easton Angelo Villalobos Francisco Gutiérrez
author_sort	Gregory P. De Pascale
title	Liquiñe-Ofqui’s fast slipping intra-volcanic arc crustal faulting above the subducted Chile Ridge
title_short	Liquiñe-Ofqui’s fast slipping intra-volcanic arc crustal faulting above the subducted Chile Ridge
title_full	Liquiñe-Ofqui’s fast slipping intra-volcanic arc crustal faulting above the subducted Chile Ridge
title_fullStr	Liquiñe-Ofqui’s fast slipping intra-volcanic arc crustal faulting above the subducted Chile Ridge
title_full_unstemmed	Liquiñe-Ofqui’s fast slipping intra-volcanic arc crustal faulting above the subducted Chile Ridge
title_sort	liquiñe-ofqui’s fast slipping intra-volcanic arc crustal faulting above the subducted chile ridge
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/e4e8b402e94d43c99dd40cfafae21203
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Liquiñe-Ofqui’s fast slipping intra-volcanic arc crustal faulting above the subducted Chile Ridge

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