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vol.38 issue3PETROGRAPHIC AND CHEMICAL CHARACTERIZATION OF OCEANIC CRUST ROCKS FROM THE COMPLEJO QUEBRADAGRANDE AND COMPARISON WITH THE DIABASAS DE SAN JOSÉ DE URAMA UNITAMMONITES AND OTHER MACROFOSSILS FROM THE LECTOSTRATOTYPE OF LA FRONTERA FORMATION, LOWER - MIDDLE TURONIAN (UPPER CRETACEOUS) IN SAN FRANCISCO, CUNDINAMARCA (COLOMBIA) author indexsubject indexarticles search
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Boletin de Geología

Print version ISSN 0120-0283

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.  http://dx.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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