Título del libro: Geochemical Treasures And Petrogenetic Processes
Título del capítulo: Petrogenesis and Tectonic Implications of Oligocene Silicic Volcanic Rocks from Villa de Reyes Graben, San Luis Potosí, Central Mexico
Autores externos:
Idioma:
Año de publicación:
2022
Palabras clave:
Geochemistry; Mexico; Petrogenesis; Rhyolite; San Luis Potosí
Resumen:
The Villa de Reyes Graben (VRG) is located in the Mesa Central (MC) province and is composed of felsic Oligocene volcanic rocks. In this paper, we present new petrography and whole-rock geochemistry for felsic volcanic rocks to understand their origin, evolution, petrogenesis and their tectonic relation with the MC. Based on geochemical composition, these rocks are divided into two main groups: (i) rhyolite and (ii) trachydacite, respectively. The rhyolite is characterized by high-SiO2 (67.58- 82.24 wt%), Al2O3 (9.74-19.54 wt%) and TiO2 (0.04-0.64 wt%), whereas trachy-dacite is characterized by SiO2 (64.20-68.78 wt%), Al2O3 (14.46-23.43 wt%) and TiO2 (0.07-0.54 wt%). These felsic volcanic rocks showed enrichment in light rare-earth elements (LREE) and are depleted in heavy rare-earth elements (HREE), along with negative, Nb, Sr, P and Ti anomalies. Geochemical modeling and REE chondrite-normalized models indicate that these felsic rocks originated through partial melting of the upper continental crust (UCC). Multi-dimensional tectonic discrimination diagrams show that these felsic volcanic rocks are related to an extensional setting, which is consistent with the Cenozoic tectonic regime through the MC. © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2022.
Entidades citadas de la UNAM:
ISBN:
9789811947827
Editorial:
Springer Nature Nombre de la publicación:
Petrogenesis and Tectonic Implications of Oligocene Silicic Volcanic Rocks from Villa de Reyes Graben, San Luis Potosí, Central Mexico
Página inicial:
49
Página final:
76
