Geochemical and Isotopic characterization of Callovian volcanogenic deposits in the Minas Viejas Formation, Mexico

Abstract

The Minas Viejas Formation represent the first evidence of marine incursion into northeastern Mexico during the Jurassic, it consists of a succession of carbonates and gypsum, and interbedded volcanic and volcanoclastic deposits. In the area southwest of Galeana, Nuevo Leon, the stratigraphic succession is recognizable despite tectonic deformation, and some members are differentiated by sedimentological and petrological characteristics, fossil content and geochemical composition. La Primavera Member comprises a volcanic and volcanoclastic deposit of Callovian age, emplaced conformably within evaporites at the base of Las Mulas member, of the Minas Viejas Formation. The regional tectonic setting in which La Primavera deposited has been related to either a rift related volcanism or a continental volcanic arc. This work provides additional geochemical and isotopic information about the tectonic affinity of La Primavera member.

AAPG Datapages/Search and Discovery Article #90369 © 2020 AAPG Hedberg Conference, Geology and Hydrocarbon Potential of the Circum-Gulf of Mexico Pre-salt Section, Mexico City, Mexico, February 4-6, 2020