Paleomagnetism in Mesozoic rocks of the Northern Andes and its implications in Mesozoic tectonics of northwestern South America

New paleomagnetic data isolated in Upper Triassic to Aptian rocks exposed in the Colombian Andes and west of the Guyana craton, in conjunction with paleomagnetic data from the Andes of Venezuela and the South American craton, permit the interpretation of along-margin northward translations of Andean...

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Detalles Bibliográficos
Publicado: 2006
Materias:
Jurassic
Northern Andes
Paleomagnetism
Tectonics
Aptian
igneous rock
Mesozoic
paleomagnetism
rock property
siliciclastic deposit
tectonic evolution
Triassic
Andes
Guyana
South America
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13438832_v58_n10_p1255_Bayona
http://hdl.handle.net/20.500.12110/paper_13438832_v58_n10_p1255_Bayona
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_13438832_v58_n10_p1255_Bayona
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spelling paper:paper_13438832_v58_n10_p1255_Bayona2023-06-08T16:10:42Z Paleomagnetism in Mesozoic rocks of the Northern Andes and its implications in Mesozoic tectonics of northwestern South America Jurassic Northern Andes Paleomagnetism Tectonics Aptian igneous rock Jurassic Mesozoic paleomagnetism rock property siliciclastic deposit tectonic evolution Triassic Andes Guyana South America New paleomagnetic data isolated in Upper Triassic to Aptian rocks exposed in the Colombian Andes and west of the Guyana craton, in conjunction with paleomagnetic data from the Andes of Venezuela and the South American craton, permit the interpretation of along-margin northward translations of Andean Colombian terranes during the Early-Middle Jurassic. Field tests and comparison with reference paleopoles for South America indicate that characteristic components uncovered in red-siliciclastic and igneous rocks are primary, or near-depositional, and they are carried dominantly by hematite, magnetite and Ti-magnetite. Difference in declination values of characteristic components isolated in fault-bounded blocks document counter-clockwise rotations previous to syn-extensional deposition. The Jurassic tectonic scheme proposed here for the northwestern corner of South America shows an Early Jurassic, linear subduction-related magmatic arc evolving to Late Jurassic rift-related setting associated to the opening of the Proto-Caribbean Ocean and westward retreat of the subduction zone. A similar tectonic evolution for the Jurassic has been proposed for Southwestern USA and the Nazas arc in Mexico. Copyright © The Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS); The Seismological Society of Japan; The Volcanological Society of Japan; The Geodetic Society of Japan; The Japanese Society for Planetary Sciences; TERRAPUB. 2006 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13438832_v58_n10_p1255_Bayona http://hdl.handle.net/20.500.12110/paper_13438832_v58_n10_p1255_Bayona
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Jurassic
Northern Andes
Paleomagnetism
Tectonics
Aptian
igneous rock
Jurassic
Mesozoic
paleomagnetism
rock property
siliciclastic deposit
tectonic evolution
Triassic
Andes
Guyana
South America
spellingShingle Jurassic
Northern Andes
Paleomagnetism
Tectonics
Aptian
igneous rock
Jurassic
Mesozoic
paleomagnetism
rock property
siliciclastic deposit
tectonic evolution
Triassic
Andes
Guyana
South America
Paleomagnetism in Mesozoic rocks of the Northern Andes and its implications in Mesozoic tectonics of northwestern South America
topic_facet Jurassic
Northern Andes
Paleomagnetism
Tectonics
Aptian
igneous rock
Jurassic
Mesozoic
paleomagnetism
rock property
siliciclastic deposit
tectonic evolution
Triassic
Andes
Guyana
South America
description New paleomagnetic data isolated in Upper Triassic to Aptian rocks exposed in the Colombian Andes and west of the Guyana craton, in conjunction with paleomagnetic data from the Andes of Venezuela and the South American craton, permit the interpretation of along-margin northward translations of Andean Colombian terranes during the Early-Middle Jurassic. Field tests and comparison with reference paleopoles for South America indicate that characteristic components uncovered in red-siliciclastic and igneous rocks are primary, or near-depositional, and they are carried dominantly by hematite, magnetite and Ti-magnetite. Difference in declination values of characteristic components isolated in fault-bounded blocks document counter-clockwise rotations previous to syn-extensional deposition. The Jurassic tectonic scheme proposed here for the northwestern corner of South America shows an Early Jurassic, linear subduction-related magmatic arc evolving to Late Jurassic rift-related setting associated to the opening of the Proto-Caribbean Ocean and westward retreat of the subduction zone. A similar tectonic evolution for the Jurassic has been proposed for Southwestern USA and the Nazas arc in Mexico. Copyright © The Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS); The Seismological Society of Japan; The Volcanological Society of Japan; The Geodetic Society of Japan; The Japanese Society for Planetary Sciences; TERRAPUB.
title Paleomagnetism in Mesozoic rocks of the Northern Andes and its implications in Mesozoic tectonics of northwestern South America
title_short Paleomagnetism in Mesozoic rocks of the Northern Andes and its implications in Mesozoic tectonics of northwestern South America
title_full Paleomagnetism in Mesozoic rocks of the Northern Andes and its implications in Mesozoic tectonics of northwestern South America
title_fullStr Paleomagnetism in Mesozoic rocks of the Northern Andes and its implications in Mesozoic tectonics of northwestern South America
title_full_unstemmed Paleomagnetism in Mesozoic rocks of the Northern Andes and its implications in Mesozoic tectonics of northwestern South America
title_sort paleomagnetism in mesozoic rocks of the northern andes and its implications in mesozoic tectonics of northwestern south america
publishDate 2006
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13438832_v58_n10_p1255_Bayona
http://hdl.handle.net/20.500.12110/paper_13438832_v58_n10_p1255_Bayona
_version_ 1768544004940496896

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