GSA Annual Meeting in Indianapolis, Indiana, USA - 2018
Paper No. 269-2
Presentation Time: 9:00 AM-6:30 PM
THE COLOMBIAN GEOCHRONOLOGICAL DATABASE (CGD)
RODRÍGUEZ CORCHO, Andrés Felipe1, ROJAS-AGRAMONTE, Yamirka1, BARRERA GONZÁLES, Johana Andrea1, GUARÍN ESTRADA, Daniel1, DAROCA, Maria Emilie1, DELGADO BALAGUERA, Sofia Margarita1, MARROQUÍN GÓMEZ, María Paula1, CORRALES GARCÍA, Alejandro1, DÍAZ MEZA, Sergio Andrés1, REYES MARTÍNEZ, Daniel1, RODRÍGUEZ RUÍZ, Marco Antonio1, LAVERDE MARTÍNEZ, Andrés Felipe1, CARVAJAL MARTÍNEZ, Alba Sofia1, IZQUIERDO CAMACHO, David1, DELGADO GUERRERO, Maria Jose1, PALACIOS MURILLO, Nicolas Ernesto1, DURAN MENDEZ, Sebastian1, CUERVO GÓMEZ, Aura María1, MUÑOZ GRANADOS, María Daniela1, MARIN JARAMILLO, Juan Pablo1, ESQUIVEL ARENALES, Laura Carolina1, DURAN TORRES, Juan Sebastian1, SALAZAR CUELLAR, Darlyng Nicole1, CARANTON MATEUS, William Guillerno1, CARTWRIGHT BUITRAGO, David1, SOLANO ACOSTA, Juan David1, BONILLA CORREA, Sarah1, ALVAREZ GALLO, Daniela1, MONTES, Camilo2, CARDONA, Agustin3 and BAYONA, Germán4, (1)Departamento de Geociencias, Universidad de los Andes, Cra 1 No 18A – 70, M1-307, Bogotá, 111711, Colombia, (2)DPTO. DE FISICA Y GEOCIENCIAS, Universidad del Norte, Km.5 Vía Puerto Colombia, Barranquilla, 081001, (3)Geología, Universidad Nacional de Colombia, Medellín, 011000, Colombia, (4)Corporación Geológica ARES, Calle 26 N. 69C-03 Torre C Of. 904, Bogotá, Colombia
Geochronological databases are powerful tools for characterizing the age spectra of a region and allows comparison with other areas. The use of such large datasets is becoming increasingly available but only a few countries or research groups are so far engaged in the painstaking work of constructing international database systems. Following the work of Gómez et al. (2015), a group of students of the Department of Geoscience at Universidad de los Andes (Colombia) is undertaking the task of creating an up-to-date and comprehensive geochronological database of the country. This database will constantly be updated and is estimated to contain about 90 percent of all radiometric ages on dated rock samples published since the early 1960s.
The Colombian Geochronological Database (CGD) is a compilation of more than 40 000 published U/Pb, K/Ar, Ar/Ar, fission track (apatite and zircon), U-Th/He, Re/Os, Rb/Sr, and Sm/Nd ages. In addition, Hf-in-zircon model ages have been included for some intrusive igneous bodies and provide complementary information on the nature/origin of the magmas and their likely origin. Accompanying each age are geographic coordinates of the dated samples as well as information about lithological units and interpretative information extracted from the respective publications. The radiometric data are presented in StratDB/DataView (Eglington, 2004; 2009). The structure of the database provides a powerful interface for constructing queries and allow us to extract information on specific units, isotopic systems, age interpretations, provinces, terranes, references, etc. This information establishes a very good framework for regional geological interpretations with geochronological, stratigraphic, structural and paleogeographic implications. Histograms and maps are produced with this database to summarize the geological history of Colombia since Precambrian times. Ages are discussed for different time windows and focus on events relevant to the evolution of northern South America.
References
Eglington, B.M. 2004. Computers & Geosciences, v. 30, p. 847-858
Eglington et al., 2009. Spec. Publ. Geol. Soc. London, v. 323, p. 27-47.
Gómez et al., 2015. SGC, Publicaciones Geológicas Especiales 33, p. 9–33. Bogotá.
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