Arc-seamount collision: driver for vertical-axis rotations in Azuero, Panama

We present new paleomagnetic data of 25 sites (240 specimens) along the southwestern part of the Azuero Peninsula, Panama. The data show two paleomagnetic domains in the peninsula: a northern domain featuring uniformly large vertical-axis clockwise rotation values of 73.4 ± 12° across to Azuero Soná...

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Detalles Bibliográficos
Publicado:	2017
Materias:	collision-induced rotation paleogeography paleomagnetism Panamanian Arc fault zone magnetic declination seamount Azuero Peninsula Panama [Central America]
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00393169_v61_n2_p199_RodriguezParra http://hdl.handle.net/20.500.12110/paper_00393169_v61_n2_p199_RodriguezParra
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00393169_v61_n2_p199_RodriguezParra
record_format	dspace
spelling	paper:paper_00393169_v61_n2_p199_RodriguezParra2023-06-08T15:03:26Z Arc-seamount collision: driver for vertical-axis rotations in Azuero, Panama collision-induced rotation paleogeography paleomagnetism Panamanian Arc fault zone magnetic declination paleogeography paleomagnetism seamount Azuero Peninsula Panama [Central America] We present new paleomagnetic data of 25 sites (240 specimens) along the southwestern part of the Azuero Peninsula, Panama. The data show two paleomagnetic domains in the peninsula: a northern domain featuring uniformly large vertical-axis clockwise rotation values of 73.4 ± 12° across to Azuero Soná Fault Zone with a single mean direction with declination of 81.2° and inclination of -3.2° (95% confidence of 11.7° and precision parameter of 18.09), and a scattered paleomagnetic domain to the south. These contrasting domains could be attributed to the collision of fartravelled/ allochthonous seamounts that approached the Panama arc as subduction of the Farallon plate brought them to the margin. As consequence of this collision the fartravelled seamounts were fragmented and scattered along the margin while the Panama arc rotated into the colliding seamounts. These new paleomagnetic data suggest that the Campanian-Eocene arc segment in the Azuero Peninsula was originally oriented NE-SW, implying an original curvature for this part of the arc. © 2017, Institute of Geophysics of the ASCR, v.v.i. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00393169_v61_n2_p199_RodriguezParra http://hdl.handle.net/20.500.12110/paper_00393169_v61_n2_p199_RodriguezParra
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	collision-induced rotation paleogeography paleomagnetism Panamanian Arc fault zone magnetic declination paleogeography paleomagnetism seamount Azuero Peninsula Panama [Central America]
spellingShingle	collision-induced rotation paleogeography paleomagnetism Panamanian Arc fault zone magnetic declination paleogeography paleomagnetism seamount Azuero Peninsula Panama [Central America] Arc-seamount collision: driver for vertical-axis rotations in Azuero, Panama
topic_facet	collision-induced rotation paleogeography paleomagnetism Panamanian Arc fault zone magnetic declination paleogeography paleomagnetism seamount Azuero Peninsula Panama [Central America]
description	We present new paleomagnetic data of 25 sites (240 specimens) along the southwestern part of the Azuero Peninsula, Panama. The data show two paleomagnetic domains in the peninsula: a northern domain featuring uniformly large vertical-axis clockwise rotation values of 73.4 ± 12° across to Azuero Soná Fault Zone with a single mean direction with declination of 81.2° and inclination of -3.2° (95% confidence of 11.7° and precision parameter of 18.09), and a scattered paleomagnetic domain to the south. These contrasting domains could be attributed to the collision of fartravelled/ allochthonous seamounts that approached the Panama arc as subduction of the Farallon plate brought them to the margin. As consequence of this collision the fartravelled seamounts were fragmented and scattered along the margin while the Panama arc rotated into the colliding seamounts. These new paleomagnetic data suggest that the Campanian-Eocene arc segment in the Azuero Peninsula was originally oriented NE-SW, implying an original curvature for this part of the arc. © 2017, Institute of Geophysics of the ASCR, v.v.i.
title	Arc-seamount collision: driver for vertical-axis rotations in Azuero, Panama
title_short	Arc-seamount collision: driver for vertical-axis rotations in Azuero, Panama
title_full	Arc-seamount collision: driver for vertical-axis rotations in Azuero, Panama
title_fullStr	Arc-seamount collision: driver for vertical-axis rotations in Azuero, Panama
title_full_unstemmed	Arc-seamount collision: driver for vertical-axis rotations in Azuero, Panama
title_sort	arc-seamount collision: driver for vertical-axis rotations in azuero, panama
publishDate	2017
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00393169_v61_n2_p199_RodriguezParra http://hdl.handle.net/20.500.12110/paper_00393169_v61_n2_p199_RodriguezParra
_version_	1768545410163408896

Arc-seamount collision: driver for vertical-axis rotations in Azuero, Panama

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