Boletín de Geología

Vol. 34 No. 2 (2012): Boletín de Geología
Articles

MACUIRA GNEISS: TECTONIC EVOLUTION OF THE PALEOZOIC METAMORPHIC ROCKS, ALTA GUAJIRA – COLOMBIA

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  • I. López,
  • Julián A.,
  • C. Zuluaga,
  • Carlos A.
I. López
Bio
Julián A.
Bio
C. Zuluaga
Bio
Carlos A.
Bio

Published 2013-04-01

How to Cite

López, I., A., J., Zuluaga, C., & A., C. (2013). MACUIRA GNEISS: TECTONIC EVOLUTION OF THE PALEOZOIC METAMORPHIC ROCKS, ALTA GUAJIRA – COLOMBIA. Boletín De Geología, 34(2). Retrieved from https://revistas.uis.edu.co/index.php/revistaboletindegeologia/article/view/3110
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Abstract

The Macuira Gneiss is a Paleozoic metamorphic unit that outcrops in the Simarua, Jarara and Macuira ranges, Alta Guajira. It is composed by a lithologies metamorphosed under amphibolite facies P-T conditions and consist of amphibolitic and quartz feldspathic gneisses, amphibolites, schists, pegmatites, calc-silicated rocks and marbles, with migmatization evidences in gneisses and amphibolites. Five foliations (S1-5) and three folding events (F1-3) were identified and interpreted as product of two metamorphic events, developed in a progressive barrovian metamorphic gradient of intermediate pressure with intermediate P-T ratio, interpreted as product of continental collision tectonics. This unit is important in understanding of the tectonic evolution of the Alta Guajira and Caribbean because it records different deformational phases pre-, syn- and post-migmatitic, that could be related with different tectonic episodes: the first associated with the collision between Laurasia and Gondwana (Alleghanian Orogeny - Late Paleozoic), and the second related with the Caribbean Plate evolution (Andean Orogeny - Meso-Cenozoic).

Keywords: Migmatites, Deformation, Alleghanian orogeny, Alta Guajira, Colombia.

 

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