Boletín de la Sociedad Geológica Mexicana Volumen 75, núm. 3, A301023, 2023 http://dx.doi.org/10.18268/BSGM2023v75n3a301023

Estratigrafía del Grupo Sierra Madre en Chiapas y su hipotético potencial petrolero

Stratigraphy of the Sierra Madre Group in Chiapas and its hypothetical petroleum potential

Samuel Eguiluz y de Antuñano^1,*, Bruno Andrés Than-Marchese², Luis Fernando Camacho Ortegón³, Rafael López-Martínez⁴, Luis Enrique Gómez-Pérez⁵

¹ Rinconada Precolombina, Bonampak 103, CDMX, México.

² Programa de Doctorado en Ciencias en Biodiversidad y Conservación de Ecosistemas Tropicales. Instituto de Ciencias Biológicas. Universidad de Ciencias y Artes de Chiapas. Libramiento Norte #1150. Col. Lajas Maciel., C.P. 29039. Tuxtla Gutiérrez, Chiapas, México.

³ Profesor, Centro de Investigación en Geociencias Aplicadas, Universidad Autónoma de Coahuila, Boulevard Simón Bolívar #303A, C.P. 26830, Nueva Rosita, Coahuila de Zaragoza, México.

⁴ Laboratorio de Carbonatos y Procesos Kársticos, Instituto de Geología, UNAM.

⁵ Museo de Paleontología Eliseo Palacios Aguilera. Secretaria de Medio Ambiente e Historia Natural. Calzada de las Personas Ilustres S/N. Col. Centro. C.P. 29000, Tuxtla Gutiérrez, Chiapas, México.

* Autor para correspondencia: (S. Eguiluz y de Antuñano) This email address is being protected from spambots. You need JavaScript enabled to view it.

Cómo citar este artículo:

Eguiluz y de Antuñano, S., Than-Marchese, B.A., Camacho Ortegón, L.F., López-Martínez, R., Gómez-Pérez, L.E., 2023, Estratigrafía del Grupo Sierra Madre en Chiapas y su hipotético potencial petrolero: Boletín de la Sociedad Geológica Mexicana, 75 (3), A301023. http://dx.doi.org/10.18268/BSGM2023v75n3a301023

Manuscrito recibido: 18 de julio de 2023; Manuscrito corregido: 01 de octubre de 2023; Manuscrito aceptado: 30 de octubre de 2023.

 ABSTRACT

The Sierra Madre Group of Chiapas has informalities in its stratigraphic nomenclature that have been transmitted through geological literature. This work describes the characteristics of three lithostratigraphic successions that make the tripartite division of the Sierra Madre Group understandable. A particular lithology, which here is defined as the El Chango succession, separates the Cantelhá and Cintalapa successions to integrate this group. Additionally, the El Chango succession makes it possible to do an appropriate mapping and its correlation allows interpreting the regional distribution of sedimentary facies that these successions. Epifluorescence of rocks from the El Chango succession (Cenomanian) exhibits organic compounds. Pyrolysis data indicate ⁓0.22% of total organic carbon in carbonate rock, its equivalent reflectance is 0.7 and 1.0, which places the rock in the generation window of metagenic oil and gas, S2 values less than 0.2 mg HC/g make the low hydrocarbon expulsion potential questionable, so additional analyzes are required. The porosity impregnated with asphalt in rocks of the Sierra Madre Group suggests the existence of reservoir rock, regionally covered by pelitic rocks as a seal, and the changes in facies and deformation indicate the existence of potential traps. The data from this work proposes to explore a hypothetical oil play in this region.

Keywords: Cenomanian, play, sedimentary facies, pyrolysis.