El ambiente tectónico del intrusivo Limón, Morona Santiago, Ecuador

Christian Wladimir Romero Cóndor; Marilyn Castillo Jara; Leyla Oñate Acurio; Darwin Condoy Guairacocha; Maria Elena Velíz Zambrano; Paola D. Pazmiño Aguiar; Fausto Carranco Andino; Ana Belen  Gramal Aguilar

doi:10.30550/j.agl/2023.34.2/1819

Authors

Christian Wladimir Romero Cóndor Intituto de Investigación Geológica y Energetica del Ecuador (IIGE) https://orcid.org/0000-0001-9271-4323
Marilyn Castillo Jara Universidad Central del Ecuador https://orcid.org/0000-0001-9406-2824
Leyla Oñate Acurio Escuela Politécnica Nacional https://orcid.org/0000-0003-4870-1976
Darwin Condoy Guairacocha https://orcid.org/0000-0001-5783-8347
Maria Elena Velíz Zambrano Instituto de Geociências, Universidad Estadual de Campinas – UNICAMP
Paola D. Pazmiño Aguiar Escuela Politécnica Nacional https://orcid.org/0000-0003-2623-676X
Fausto Carranco Andino Instituto de Investigación Geológico y Energético https://orcid.org/0000-0001-9412-8942
Ana Belen Gramal Aguilar Instituto de Investigación Geológico y Energético https://orcid.org/0000-0002-2216-8846

DOI:

https://doi.org/10.30550/j.agl/2023.34.2/1819

Keywords:

Petrography, Geochemistry, Jurassic Magmatism, Limón, Sub-Andean Zone

Abstract

To the south of the Sub-Andean zone, the Zamora intrusive complex includes a broad spectrum of granitoid calc-alkaline affinity, which was interpreted as the magmatic roots of the Jurassic long-lived volcanic arc. Countless uncharacterized intrusive bodies were mapped as Zamora intrusive complex. The shear relationships between intrusive rocks and host rocks were not described. The nature and stratigraphic position of the host rock have not been analyzed. The petrographic and geochemical detail of intrusive rocks were not considered. This information is necessary to ensure an adequate understanding of this region's Jurassic magmatism and other magmatic episodes. This research discusses the tectonic environment of an intrusive body in the vicinity of the General Leónidas Plaza village (Limón), called Limón intrusive. Regional lithostratigraphic analysis, shear relationships, and petrographic and geochemical characterization support this work. The intrusive Limón outcrop on the Limón to Chiviaza road. It consists of a dome-type central body and a set of dome-type peripheral bodies, oriented N-S and approximately 3 km long. It is composed of a lithological spectrum that includes granodiorites and quartz monzonite. The relationships between silica and alkali indicate alkaline-calcic to alkaline affinity, with a magnesian and peraluminous character. The Th and Co concentrations indicate high K calc-alkaline series. The relationships between Th, Yb, Nb, Rb, Y, Yb, Hf, and Ta indicate that the samples analyzed come from a continental arc developed in an orogenic tectonic domain of thickened crust, which evolved to an intra-continental post-magmatic episode.

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Author Biography

Christian Wladimir Romero Cóndor, Intituto de Investigación Geológica y Energetica del Ecuador (IIGE)

Christian Wladimir Romero Cóndor. - Nació en Quito, Ecuador en 1992. Recibió su título de Ingeniero en Geología de la Escuela Politécnica Nacional; ha participado como expositor en las VII Jornadas de Ciencias de la Tierra, EPN en 2017; como expositor en la American Association of Petroleum Geologists, AAPG en 2018 y 2019; en el 8th-ISAG en el 2019, en la Geological Society of America, GSA en 2020. Tiene dos diplomados: Geología del Cuaternario; Estratigrafía y Sedimentología Desde el 2019 es becario del Organismo Internacional de Energía Atómica. Su campo de investigación está relacionado a la Sedimentología y Estratigrafía aplicada a la geología regional y reconstrucciones paleo ambientales. Actualmente trabaja en el Proyecto de Investigación Geológica y Disponibilidad de Ocurrencias Minerales en el Territorio Ecuatoriano desarrollado por el Instituto de Investigación Geológica y Energética

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