Strike-slip deformation within the Colombian Andes-Reference-Cited by-同舟云学术

Strike-slip deformation within the Colombian Andes

Published:2007 Issue:1 Volume:272 Page:303-319
ISSN:0305-8719
Container-title:Geological Society, London, Special Publications
language:en
Short-container-title:Geological Society, London, Special Publications

Author:

Acosta Jorge¹²,Velandia Francisco³,Osorio Jairo³,Lonergan Lidia²,Mora Héctor³

Affiliation:

1. EXGEO-CGG, Maracaibo Venezuela (e-mail: jeacol@hotmail.com)

2. Department of Earth Science and Engineering, Imperial College, Royal School of Mines, Prince Consort Road, London SW7 2BP, UK

3. Ingeominas, Diagonal 53# 34-53, Bogotá, Colombia

Abstract

AbstractThe Colombian Andes are characterized by a dominant NE structural trend, which is offset by ENE-trending right-lateral and NW-trending left-lateral structures. NE-trending faults are either dip-slip or oblique thrusts, generated as a result of a trans-pressive regime active since at least Palaeogene times. NW-trending faults are considered to be reactivated pre-Cretaceous extensional structures. Right-lateral shear on ENE-trending faults has resulted from oblique convergence between the Nazca Plate and the Northern Andes. Major changes in the geometry of the oblique-plate convergence between the Nazca and South American plates have generated the northward ‘escape’ of the Northern Andes and stress-strain partitioning within the mountain belt. These strike-slip structures have exerted important controls on sedimentation, source-rock distribution, fluid flow and ore mineralization during Cenozoic times. The interpretation of the Northern Andes as a mountain belt affected by strike-slip deformation provides a structural context in which to reassess the exploration plays.

Publisher

Geological Society of London

Subject

Geology,Ocean Engineering,Water Science and Technology

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