THE COLOMBIAN GEOCHRONOLOGICAL DATABASE (CGD)
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.
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.