Present-day crustal deformation along the Magallanes-Fagnano Fault System in Tierra del Fuego from repeated GPS observations

The present-day deformation of the earth crust in the Argentine part of Tierra del Fuego main island (southernmost South America) is here investigated based on repeated geodetic GPS observations. The island is traversed by the active transform boundary between the South American and Scotia tectonic...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Mendoza, Luciano Pedro Oscar, Perdomo, Raúl Aníbal, Hormaechea, José Luis, Del Cogliano, Daniel Héctor, Fritsche, Mathias, Richter, Andreas Jorg, Dietrich, Reinhard
Formato: Articulo
Lenguaje:Inglés
Publicado: 2011
Materias:
Ciencias Astronómicas
Neotectonics
Satellite geodesy
South America
Transform faults
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84040
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84040
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Neotectonics
Satellite geodesy
South America
Transform faults
spellingShingle Ciencias Astronómicas
Neotectonics
Satellite geodesy
South America
Transform faults
Mendoza, Luciano Pedro Oscar
Perdomo, Raúl Aníbal
Hormaechea, José Luis
Del Cogliano, Daniel Héctor
Fritsche, Mathias
Richter, Andreas Jorg
Dietrich, Reinhard
Present-day crustal deformation along the Magallanes-Fagnano Fault System in Tierra del Fuego from repeated GPS observations
topic_facet Ciencias Astronómicas
Neotectonics
Satellite geodesy
South America
Transform faults
description The present-day deformation of the earth crust in the Argentine part of Tierra del Fuego main island (southernmost South America) is here investigated based on repeated geodetic GPS observations. The island is traversed by the active transform boundary between the South American and Scotia tectonic plates, represented by the Magallanes-Fagnano fault system. Since 1993 a regional network comprising to date 29 GPS sites has been observed almost every year. The complete set of accumulated observations was processed using the Bernese GPS software and state-of-the-art processing strategies and models. The utilization of homogeneous GPS products resulting from a reprocessing of the global IGS network warrants a stable realization of a global reference frame. For each GPS site 3-D positions and linear velocities with error estimates were obtained. A strain analysis of the horizontal velocity components revealed the zones of major deformation activity. A 30-km-wide deformation belt centred on the main trace of the fault system was identified. This belt is bordered to the north (South America) and south (Scotia) by geodynamically stable zones, which move horizontally with a relative average velocity of 4.4 ± 0.6 (east) and -0.3 ± 0.4 (north) mm a<SUP>-1</SUP>. Within the deformation belt a maximum strain rate in the order of 0.25 μstrain per year has been detected. A pronounced change in the deformation style from transtension (east) to transpression (west) is observed. The area of predominating shortening of the crust coincides with a local rotation minimum and relative uplift. Throughout the period covered by the GPS observations the displacements and deformations occurred to be linear with time.
format Articulo
Articulo
author Mendoza, Luciano Pedro Oscar
Perdomo, Raúl Aníbal
Hormaechea, José Luis
Del Cogliano, Daniel Héctor
Fritsche, Mathias
Richter, Andreas Jorg
Dietrich, Reinhard
author_facet Mendoza, Luciano Pedro Oscar
Perdomo, Raúl Aníbal
Hormaechea, José Luis
Del Cogliano, Daniel Héctor
Fritsche, Mathias
Richter, Andreas Jorg
Dietrich, Reinhard
author_sort Mendoza, Luciano Pedro Oscar
title Present-day crustal deformation along the Magallanes-Fagnano Fault System in Tierra del Fuego from repeated GPS observations
title_short Present-day crustal deformation along the Magallanes-Fagnano Fault System in Tierra del Fuego from repeated GPS observations
title_full Present-day crustal deformation along the Magallanes-Fagnano Fault System in Tierra del Fuego from repeated GPS observations
title_fullStr Present-day crustal deformation along the Magallanes-Fagnano Fault System in Tierra del Fuego from repeated GPS observations
title_full_unstemmed Present-day crustal deformation along the Magallanes-Fagnano Fault System in Tierra del Fuego from repeated GPS observations
title_sort present-day crustal deformation along the magallanes-fagnano fault system in tierra del fuego from repeated gps observations
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/84040
work_keys_str_mv AT mendozalucianopedrooscar presentdaycrustaldeformationalongthemagallanesfagnanofaultsystemintierradelfuegofromrepeatedgpsobservations
AT perdomoraulanibal presentdaycrustaldeformationalongthemagallanesfagnanofaultsystemintierradelfuegofromrepeatedgpsobservations
AT hormaecheajoseluis presentdaycrustaldeformationalongthemagallanesfagnanofaultsystemintierradelfuegofromrepeatedgpsobservations
AT delcoglianodanielhector presentdaycrustaldeformationalongthemagallanesfagnanofaultsystemintierradelfuegofromrepeatedgpsobservations
AT fritschemathias presentdaycrustaldeformationalongthemagallanesfagnanofaultsystemintierradelfuegofromrepeatedgpsobservations
AT richterandreasjorg presentdaycrustaldeformationalongthemagallanesfagnanofaultsystemintierradelfuegofromrepeatedgpsobservations
AT dietrichreinhard presentdaycrustaldeformationalongthemagallanesfagnanofaultsystemintierradelfuegofromrepeatedgpsobservations
bdutipo_str Repositorios
_version_ 1764820488316518403

Ejemplares similares