Correlación de las formaciones Agoyán y Tres Lagunas en la vía Cucanamá Tumianuma

Abstract

Abstract:This work focuses on the correlation of the Agoyán and Tres Lagunas formations, in the Cucanamá Tumianuma sector of the Vilcabamba parish in the province of Loja. In 2017, the IGEM published the Gonzanamá 1:1000,000 geological chart showing the lands of the Loja Division, Chigüinda Unit and Tres Lagunas Formation; However, the Agoyán Formation is not identified, which is why this study is proposed. The methodology was developed in four phases; initial information gathering phase; field work phase interpretation and survey 1:25,000 scale, description of rocks and sampling; laboratory work phase geochemical and petrographic tests; final phase of cabinet development of technical report. The results showed the presence of chlorite in the geochemical tests, biotite, chlorite and albite in thin sections, demonstrating the presence of green shale from the Agoyán Formation. In the Tres Lagunas Formation, albite was evident in geochemical tests and in thin sections of muscovite, biotite and quartz. The Chigüinda Unit declared biotite in the geochemical tests and albite and quartz in thin sections.