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What Drives Orogenic Asymmetry in the Northern Andes?: A Case Study from the Apex of the Northern Andean Orocline

By
Andres Mora
Andres Mora
ECOPETROL-Instituto Colombiano del Petroleo, Km7 via Bucaramanga-Piedecuesta, Piedecuesta-Santander, Colombia (e-mails: andres.mora@ecopetrol.com.co; mparra@iee.usp.br; guillermo.rodriguezf@ecopetrol.com.co; vladimir.blanco@ecopetrol.com.co; nestor.moreno@ecopetrol.com.co; victor.caballero@ecopetrol.com.co)
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Mauricio Parra
Mauricio Parra
ECOPETROL-Instituto Colombiano del Petroleo, Km7 via Bucaramanga-Piedecuesta, Piedecuesta-Santander, Colombia (e-mails: andres.mora@ecopetrol.com.co; mparra@iee.usp.br; guillermo.rodriguezf@ecopetrol.com.co; vladimir.blanco@ecopetrol.com.co; nestor.moreno@ecopetrol.com.co; victor.caballero@ecopetrol.com.co)
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Guillermo Rodriguez Forero
Guillermo Rodriguez Forero
ECOPETROL-Instituto Colombiano del Petroleo, Km7 via Bucaramanga-Piedecuesta, Piedecuesta-Santander, Colombia (e-mails: andres.mora@ecopetrol.com.co; mparra@iee.usp.br; guillermo.rodriguezf@ecopetrol.com.co; vladimir.blanco@ecopetrol.com.co; nestor.moreno@ecopetrol.com.co; victor.caballero@ecopetrol.com.co)
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Vladimir Blanco
Vladimir Blanco
ECOPETROL-Instituto Colombiano del Petroleo, Km7 via Bucaramanga-Piedecuesta, Piedecuesta-Santander, Colombia (e-mails: andres.mora@ecopetrol.com.co; mparra@iee.usp.br; guillermo.rodriguezf@ecopetrol.com.co; vladimir.blanco@ecopetrol.com.co; nestor.moreno@ecopetrol.com.co; victor.caballero@ecopetrol.com.co)
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Nestor Moreno
Nestor Moreno
ECOPETROL-Instituto Colombiano del Petroleo, Km7 via Bucaramanga-Piedecuesta, Piedecuesta-Santander, Colombia (e-mails: andres.mora@ecopetrol.com.co; mparra@iee.usp.br; guillermo.rodriguezf@ecopetrol.com.co; vladimir.blanco@ecopetrol.com.co; nestor.moreno@ecopetrol.com.co; victor.caballero@ecopetrol.com.co)
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Victor Caballero
Victor Caballero
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Daniel Stockli
Daniel Stockli
Department of Geological Sciences, Jackson School of Geosciences, The University of Texas at Austin, Austin, Texas 78712, U.S.A. (e-mail: stockli@jsg.utexas.edu)
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Ian Duddy
Ian Duddy
Geotrack International, 37 Melville Rd., Brunswick West, Vic 3055, AUSTRALIA (e-mail: mail@geotrack.com.au)
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Badr Ghorbal
Badr Ghorbal
University of Kansas, Simula Research Laboratory, P.O. Box 134, 1325 Lysaker, Norway (e-mail: badr@simula.no)
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Published:
January 01, 2015

Abstract

We present the results of 59 new apatite fission tracks (AFT), 24 new vitrinite reflectance analysis, and 154 new He thermocronometric analysis from the eastern flank of the Colombian eastern Cordillera at lat7° N to constrain the roles of plate tectonics, tectonic inheritance, and surface processes in building the Cocuy syntaxis. The Cocuy syntaxis is the region with the highest structural and topographic relief in the eastern Cordillera.

The primary factor controlling that is faster tectonism, apparently related to the most important Panama collision at 4 Ma. This push from behind is focused between two resistant plates and escapes toward a weak foreland plate, which is able to flex. However, we document new Pliocene and younger AFT ages in the eastern side of the eastern Cordillera, which are related with focused and faster exhumation in the eastern flank. We suggest that this episode is responsible for the limited advance of the deformation front as basement-involved blocks. In addition, faster denudation causes faster sedimentation rates in the weak foreland plate east of the Cocuy syntaxis. In this case, the thick pile of Neogene synkinematic sediments would have limited thin skin deformation migration.

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Contents

AAPG Memoir

Petroleum Geology and Potential of the Colombian Caribbean Margin

Claudio Bartolini
Claudio Bartolini
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Paul Mann
Paul Mann
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American Association of Petroleum Geologists
Volume
108
ISBN electronic:
9781629812724
Publication date:
January 01, 2015

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