Shallow architecture of fuegian andes lineaments based on electrical resistivity tomography (ERT). evidences of transverse extensional faulting in the central beagle channel area

The southern foothills of the Fuegian Andes are bounded by the Beagle Channel (BC), a conspicuous E-W longitudinal basin, controlled by a large transcurrent fault system, which extends from the Atlantic to the Pacific Ocean. The northern shore of the Beagle Channel’s central segment is characterized...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Bran, D.M., Tassone, A., Menichetti, M., Cerredo, M.E., Lozano, J.G., Lodolo, E., Vilas, J.F.
Formato: JOUR
Materias:
Beagle
ERT
Extension
Lineaments
Transverse Faults
electrical method
electrical resistivity
extensional tectonics
faulting
geophysical survey
lineament
strike-slip fault
structural geology
tomography
Beagle Channel
Tierra del Fuego [(ISG) South America]
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_07187092_v45_n1_p1_Bran
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_07187092_v45_n1_p1_Bran
record_format dspace
spelling todo:paper_07187092_v45_n1_p1_Bran2023-10-03T15:36:46Z Shallow architecture of fuegian andes lineaments based on electrical resistivity tomography (ERT). evidences of transverse extensional faulting in the central beagle channel area Bran, D.M. Tassone, A. Menichetti, M. Cerredo, M.E. Lozano, J.G. Lodolo, E. Vilas, J.F. Beagle ERT Extension Lineaments Transverse Faults electrical method electrical resistivity extensional tectonics faulting geophysical survey lineament strike-slip fault structural geology tomography Beagle Channel Tierra del Fuego [(ISG) South America] The southern foothills of the Fuegian Andes are bounded by the Beagle Channel (BC), a conspicuous E-W longitudinal basin, controlled by a large transcurrent fault system, which extends from the Atlantic to the Pacific Ocean. The northern shore of the Beagle Channel’s central segment is characterized by several E-W oriented valleys, parallel to the main basin, which are interspersed with a series of oblique NW trending lineaments that extend across the mountain belt. A geoelectrical survey was carried out in order to investigate the shallow architecture of such sets of linear morphologies. The principal E-W lineament system was characterized by conspicuous sub-vertical resistivity contrasts, interpreted as fractured zones associated with fault strands of the main strike-slip Beagle Channel system, whereas the oblique NW-SE trending set of lineaments revealed slightly different resistivity patterns, with vertical displacements and less abrupt contrasts. These resistivity patterns, in combination with the widespread occurrence of normal faulting in the area, allowed to infer an extensional control over the oblique depressions. These morphological features were related to oblique transverse faults that segment two sub parallel E-W fault systems. The oblique faults were probably developed along inherited structural anisotropies and can be extended well beyond the BC shoreline to the NW. Both geophysical and field evidence suggest a post-glacial deformation along the area. © 2018, Servicio Nacional de Geologia y Mineria. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_07187092_v45_n1_p1_Bran
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Beagle
ERT
Extension
Lineaments
Transverse Faults
electrical method
electrical resistivity
extensional tectonics
faulting
geophysical survey
lineament
strike-slip fault
structural geology
tomography
Beagle Channel
Tierra del Fuego [(ISG) South America]
spellingShingle Beagle
ERT
Extension
Lineaments
Transverse Faults
electrical method
electrical resistivity
extensional tectonics
faulting
geophysical survey
lineament
strike-slip fault
structural geology
tomography
Beagle Channel
Tierra del Fuego [(ISG) South America]
Bran, D.M.
Tassone, A.
Menichetti, M.
Cerredo, M.E.
Lozano, J.G.
Lodolo, E.
Vilas, J.F.
Shallow architecture of fuegian andes lineaments based on electrical resistivity tomography (ERT). evidences of transverse extensional faulting in the central beagle channel area
topic_facet Beagle
ERT
Extension
Lineaments
Transverse Faults
electrical method
electrical resistivity
extensional tectonics
faulting
geophysical survey
lineament
strike-slip fault
structural geology
tomography
Beagle Channel
Tierra del Fuego [(ISG) South America]
description The southern foothills of the Fuegian Andes are bounded by the Beagle Channel (BC), a conspicuous E-W longitudinal basin, controlled by a large transcurrent fault system, which extends from the Atlantic to the Pacific Ocean. The northern shore of the Beagle Channel’s central segment is characterized by several E-W oriented valleys, parallel to the main basin, which are interspersed with a series of oblique NW trending lineaments that extend across the mountain belt. A geoelectrical survey was carried out in order to investigate the shallow architecture of such sets of linear morphologies. The principal E-W lineament system was characterized by conspicuous sub-vertical resistivity contrasts, interpreted as fractured zones associated with fault strands of the main strike-slip Beagle Channel system, whereas the oblique NW-SE trending set of lineaments revealed slightly different resistivity patterns, with vertical displacements and less abrupt contrasts. These resistivity patterns, in combination with the widespread occurrence of normal faulting in the area, allowed to infer an extensional control over the oblique depressions. These morphological features were related to oblique transverse faults that segment two sub parallel E-W fault systems. The oblique faults were probably developed along inherited structural anisotropies and can be extended well beyond the BC shoreline to the NW. Both geophysical and field evidence suggest a post-glacial deformation along the area. © 2018, Servicio Nacional de Geologia y Mineria. All rights reserved.
format JOUR
author Bran, D.M.
Tassone, A.
Menichetti, M.
Cerredo, M.E.
Lozano, J.G.
Lodolo, E.
Vilas, J.F.
author_facet Bran, D.M.
Tassone, A.
Menichetti, M.
Cerredo, M.E.
Lozano, J.G.
Lodolo, E.
Vilas, J.F.
author_sort Bran, D.M.
title Shallow architecture of fuegian andes lineaments based on electrical resistivity tomography (ERT). evidences of transverse extensional faulting in the central beagle channel area
title_short Shallow architecture of fuegian andes lineaments based on electrical resistivity tomography (ERT). evidences of transverse extensional faulting in the central beagle channel area
title_full Shallow architecture of fuegian andes lineaments based on electrical resistivity tomography (ERT). evidences of transverse extensional faulting in the central beagle channel area
title_fullStr Shallow architecture of fuegian andes lineaments based on electrical resistivity tomography (ERT). evidences of transverse extensional faulting in the central beagle channel area
title_full_unstemmed Shallow architecture of fuegian andes lineaments based on electrical resistivity tomography (ERT). evidences of transverse extensional faulting in the central beagle channel area
title_sort shallow architecture of fuegian andes lineaments based on electrical resistivity tomography (ert). evidences of transverse extensional faulting in the central beagle channel area
url http://hdl.handle.net/20.500.12110/paper_07187092_v45_n1_p1_Bran
work_keys_str_mv AT brandm shallowarchitectureoffuegianandeslineamentsbasedonelectricalresistivitytomographyertevidencesoftransverseextensionalfaultinginthecentralbeaglechannelarea
AT tassonea shallowarchitectureoffuegianandeslineamentsbasedonelectricalresistivitytomographyertevidencesoftransverseextensionalfaultinginthecentralbeaglechannelarea
AT menichettim shallowarchitectureoffuegianandeslineamentsbasedonelectricalresistivitytomographyertevidencesoftransverseextensionalfaultinginthecentralbeaglechannelarea
AT cerredome shallowarchitectureoffuegianandeslineamentsbasedonelectricalresistivitytomographyertevidencesoftransverseextensionalfaultinginthecentralbeaglechannelarea
AT lozanojg shallowarchitectureoffuegianandeslineamentsbasedonelectricalresistivitytomographyertevidencesoftransverseextensionalfaultinginthecentralbeaglechannelarea
AT lodoloe shallowarchitectureoffuegianandeslineamentsbasedonelectricalresistivitytomographyertevidencesoftransverseextensionalfaultinginthecentralbeaglechannelarea
AT vilasjf shallowarchitectureoffuegianandeslineamentsbasedonelectricalresistivitytomographyertevidencesoftransverseextensionalfaultinginthecentralbeaglechannelarea
_version_ 1807315277692534784

Ejemplares similares