Structural interpretation from geological and geophysical data of a geological section located at the San Juan river headwaters

We present a subsurface structural reconstruction from a NE-SW cross section at the San Juan river headwaters, in the Western Precordillera. The stratigraphy of study area is mainly represented by marine rocks of lower-middle Paleozoic age which are uncomformably covered by Neopaleozoic continental...

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Autores principales:	Vujovich, Graciela Irene, Boedo, Florencia Lucila
Publicado:	2015
Materias:	Analytic signal Andean structure Magnetic map Pre-andean structure geological structure headwater magnetic anomaly mapping Paleozoic signal stratigraphy thrust Precordillera San Juan River [United States] United States
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v72_n4_p495_Ariza http://hdl.handle.net/20.500.12110/paper_00044822_v72_n4_p495_Ariza
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00044822_v72_n4_p495_Ariza
record_format	dspace
spelling	paper:paper_00044822_v72_n4_p495_Ariza2023-06-08T14:26:48Z Structural interpretation from geological and geophysical data of a geological section located at the San Juan river headwaters Vujovich, Graciela Irene Boedo, Florencia Lucila Analytic signal Andean structure Magnetic map Pre-andean structure geological structure headwater magnetic anomaly mapping Paleozoic signal stratigraphy thrust Precordillera San Juan River [United States] United States We present a subsurface structural reconstruction from a NE-SW cross section at the San Juan river headwaters, in the Western Precordillera. The stratigraphy of study area is mainly represented by marine rocks of lower-middle Paleozoic age which are uncomformably covered by Neopaleozoic continental and marine rocks. The structure is characterized by thrust and fold systems of different scales. The thrusts have been separated into two groups: Group I corresponds to NW-SE thrusts with southwestward vergence, while Group II is represented by N-S thrusts with eastward vergence. The superficial relationship between the structures from both groups allows us to postulate that the Group I thrusts are older than Group II thrusts. The similar folds have southwestward vergence and they are frequently related to development of axial plane cleavage and a conspicuous low grade metamorphic event. The geometry of thrusts and folds on surface has allowed us to reconstruct their distribution in depth. Residual magnetic anomaly and analytical signal maps show the correspondence between the superficial structural frame and the magnetic properties in the study area. The solutions provided by the Werner method and its different structural indexes (dykes and contacts) have allow us to adjust and constrain the structural model up to a depth of 3500 m coincident with the subsurface region of maximum magnetic contrast. © 2015, Asociacion Geologica Argentina. All Rights Reserved. Fil:Vujovich, G.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Boedo, F.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v72_n4_p495_Ariza http://hdl.handle.net/20.500.12110/paper_00044822_v72_n4_p495_Ariza
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Analytic signal Andean structure Magnetic map Pre-andean structure geological structure headwater magnetic anomaly mapping Paleozoic signal stratigraphy thrust Precordillera San Juan River [United States] United States
spellingShingle	Analytic signal Andean structure Magnetic map Pre-andean structure geological structure headwater magnetic anomaly mapping Paleozoic signal stratigraphy thrust Precordillera San Juan River [United States] United States Vujovich, Graciela Irene Boedo, Florencia Lucila Structural interpretation from geological and geophysical data of a geological section located at the San Juan river headwaters
topic_facet	Analytic signal Andean structure Magnetic map Pre-andean structure geological structure headwater magnetic anomaly mapping Paleozoic signal stratigraphy thrust Precordillera San Juan River [United States] United States
description	We present a subsurface structural reconstruction from a NE-SW cross section at the San Juan river headwaters, in the Western Precordillera. The stratigraphy of study area is mainly represented by marine rocks of lower-middle Paleozoic age which are uncomformably covered by Neopaleozoic continental and marine rocks. The structure is characterized by thrust and fold systems of different scales. The thrusts have been separated into two groups: Group I corresponds to NW-SE thrusts with southwestward vergence, while Group II is represented by N-S thrusts with eastward vergence. The superficial relationship between the structures from both groups allows us to postulate that the Group I thrusts are older than Group II thrusts. The similar folds have southwestward vergence and they are frequently related to development of axial plane cleavage and a conspicuous low grade metamorphic event. The geometry of thrusts and folds on surface has allowed us to reconstruct their distribution in depth. Residual magnetic anomaly and analytical signal maps show the correspondence between the superficial structural frame and the magnetic properties in the study area. The solutions provided by the Werner method and its different structural indexes (dykes and contacts) have allow us to adjust and constrain the structural model up to a depth of 3500 m coincident with the subsurface region of maximum magnetic contrast. © 2015, Asociacion Geologica Argentina. All Rights Reserved.
author	Vujovich, Graciela Irene Boedo, Florencia Lucila
author_facet	Vujovich, Graciela Irene Boedo, Florencia Lucila
author_sort	Vujovich, Graciela Irene
title	Structural interpretation from geological and geophysical data of a geological section located at the San Juan river headwaters
title_short	Structural interpretation from geological and geophysical data of a geological section located at the San Juan river headwaters
title_full	Structural interpretation from geological and geophysical data of a geological section located at the San Juan river headwaters
title_fullStr	Structural interpretation from geological and geophysical data of a geological section located at the San Juan river headwaters
title_full_unstemmed	Structural interpretation from geological and geophysical data of a geological section located at the San Juan river headwaters
title_sort	structural interpretation from geological and geophysical data of a geological section located at the san juan river headwaters
publishDate	2015
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v72_n4_p495_Ariza http://hdl.handle.net/20.500.12110/paper_00044822_v72_n4_p495_Ariza
work_keys_str_mv	AT vujovichgracielairene structuralinterpretationfromgeologicalandgeophysicaldataofageologicalsectionlocatedatthesanjuanriverheadwaters AT boedoflorencialucila structuralinterpretationfromgeologicalandgeophysicaldataofageologicalsectionlocatedatthesanjuanriverheadwaters
_version_	1768545214758125568

Structural interpretation from geological and geophysical data of a geological section located at the San Juan river headwaters

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