Abstract

CELIS, Sergio Andrés; GIRALDO-VILLEGAS, Carlos Ariel; TORO-TORO, Luz Mary  and  OSORIO-GRANADA, Edward. PETROGRAPHY AND CARTOGRAPHY OF CONTACT AUREOLE OF THE MARIQUITA GRANODIORITE (TOLIMA DEPARTMENT, COLOMBIAN CENTRAL CORDILLERA). bol.geol. [online]. 2016, vol.38, n.3, pp.31-40. ISSN 0120-0283.  https://doi.org/10.18273/revbol.v38n3-2016002.

In the Department of Tolima, northwest of the town of Mariquita, crops out the Mariquita Granodiorite, which known age is 113 ± 4 Ma K-Ar in biotite. The intrusive contact with the green, gray and black schists of the Cajamarca Complex developed a clear contact aureole with a maximum width of approximately 520 m in the area of Medina Falls (Mariquita-La Victoria road), which extends to the Chiminá creek, where its extent is reduced to approximately 240 m. Quartz-biotite and quartz-actinolite hornfels were developed as a superimposed event to a previous regional and ductile metamorphism. The albite-epidote hornfels facies is determined by the actinolite-epidote-chlorite association.

Keywords : contact aureole; Mariquita; Colombia.

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