Thermochronology, geochronology and geochemistry of the Western and Central cordilleras and Sierra Nevada de Santa Marta, Colombia: the tectonic evolution of NW South America

Chapter 10

“…Our results indicate that the Permian arc, previously reported in the SNSM (Cardona et al, 2010b) and the Central Cordillera (Cochrane et al, 2014;Leal-Mejía, 2011;Rodríguez et al, 2017;Villagómez, 2010), is more extensive and voluminous and includes parts of the SSL and UMV. This Permian magmatism may have peaked at the end of the Cisuralian, assimilating most rocks that originated during the previous stages of the arc…”

“…Gómez et al (2015a). Data source: U-Pb zircon ages from Cardona et al (2010b), Cochrane (2013), Cochrane et al (2014), Gómez et al (2015b), Leal-Mejía (2011), Piraquive, (2017), Restrepo et al (2011), Rodríguez et al (2017), Villagómez (2010), and this study. (b) Proposed distribution of metamorphic basement units in the regions related to Permian magmatism.…”

“…Permian arc granitoids (Figure 2), including La Plata Granite (Leal-Mejía, 2011;Rodríguez, 1995a;Rodríguez et al, 1998Rodríguez et al, , 2017Velandia et al, 2001a) and the southern Rovira Granitic Stocks (Cochrane, 2013;Núñez et al, 1984a;Villagómez, 2010) (Table 1), intruded the basement and the Paleozoic sedimentary rocks.…”

“…The description of plutons that comprise the Permian arc on the western boundary of the Chibcha Terrane presented in this study was conducted by the Servicio Geológico Colombiano (SGC) and from a compilation of previous studies (Cardona et al, 2010b;Leal-Mejía, 2011;Piraquive, 2017;Restrepo et al, 2011;Rodríguez et al, 2014Rodríguez et al, , 2017Villagómez, 2010). The plutons that form the Permian arc defined in this study are along the eastern margin of the Central Cordillera and in the Upper Magdalena Valley (La Plata Granite sensu Rodríguez, 1995a;Leal-Mejía, 2011;Rodríguez et al, 1998Rodríguez et al, , 2017Velandia et al, 1999Velandia et al, , 2001a; the Ortega Granite, this study), serranía de San Lucas (Nechí Gneiss sensu Restrepo et al, 2011;Leal-Mejía, 2011;Rodríguez et al, 2014), and Sierra Nevada de Santa Marta (mylonitic granitoids sensu Cardona et al, 2010b, subsequently named El Encanto Orthogneiss sensu Piraquive, 2017).…”