Rocas ultramáficas en los Andes norpatagónicos: ¿está su emplazamiento asociado a la actividad tectónica Neógena de la Zona de Falla Liquiñe-Ofqui?

Translated title of the contribution: Ultramafic rocks in the north patagonian andes: Is their emplacement associated with the neogene tectonics of the liquiñe-ofqui fault zone?

Francisco Hervé, Francisco Fuentes, Mauricio Calderón, Mark Fanning, Paulo Quezada, Robert Pankhurst, Carlos Rapela

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

Serpentinites and fresh or partially serpentinized harzburgite crop out in the western slope of the North Patagonian Andes of continental Chiloé (41°44’-42°12’S). These rocks are spatially associated with low-grade metamorphic rocks containing Cenozoic detrital zircons. The metamorphic rocks, together with Devonian metasediments, have been mapped previously as Late Paleozoic-Triassic metamorfic complex, an age no longer tenable for at least part of the complex. Transpressional tectonic emplacement of the ultramafic body or bodies is thought to have been related to activity on the Liquiñe-Ofqui Fault Zone, following a late Oligocene-Early Miocene extensional phase in the forearc region of the present Andes. This fault zone occurs immediately east of the outcrops of the ultramafic rocks and has been interpreted previously as generating a hemi-flower or flower structure.

Translated title of the contributionUltramafic rocks in the north patagonian andes: Is their emplacement associated with the neogene tectonics of the liquiñe-ofqui fault zone?
Original languageSpanish
Pages (from-to)1-16
Number of pages16
JournalAndean Geology
Volume44
Issue number1
DOIs
Publication statusPublished - Jan 2017

ASJC Scopus subject areas

  • Geology
  • Geochemistry and Petrology
  • Stratigraphy
  • Palaeontology

Fingerprint

Dive into the research topics of 'Ultramafic rocks in the north patagonian andes: Is their emplacement associated with the neogene tectonics of the liquiñe-ofqui fault zone?'. Together they form a unique fingerprint.

Cite this