Geoquímica de rocas siliciclásticas de la Formación Corral de Enmedio y Arenisca Camas, cuenca Cabullona, Sonora: Paleometeorización y procedencia

Translated title of the contribution: Geochemistry of siliciclastic rocks of the Corral de Enmedio Formation and Camas Sandstone, Cabullona basin, Sonora: Paleoweathering and provenance

Jocelyn Galindo-Ruiz, Jayagopal Madhavaraju*, Francisco J. Grijalva-Noriega, Rogelio Monreal, Inocente G. Espinoza-Maldonado

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The sedimentary sequence of the Cabullona Group deposited in the Cabullona basin during Late Cretaceous is well exposed in the Naco region of northeastern Sonora. It has been divided into various formations and the total thickness of this group is about 2.5 km with possible age of 72 Ma. Geochemical study was undertaken on the sandstones of the Corral de Enmedio Formation and the Camas Sandstone to determine the paleoweathering, provenance and tectonic setting. The SREE contents range from 96 to 144 ppm for the sandstones from Corral de Enmedio Formation and 74 to 169 ppm for the Camas Sandstone. The chondrite normalized REE diagrams for sandstones from both formations have LREE enriched, relatively flat HREE patterns with negative to positive Eu anomalies. The CIA and PIA values and A-CN-K diagram indicate that the sandstones of the Corral de Enmedio Formation were derived from the source area that was subjected to a low degree of chemical weathering, whereas the Camas Sandstone reveals low to moderate intensity of chemical weathering of the source area. Al2O3/TiO2 ratios, and various bivariate and ternary diagrams, comparison of REE patterns with source rocks, and mixing calculation of source rocks indicate that the sandstones of the Corral de Enmedio Formation were predominantly derived from felsic source rocks, with minor contribution from intermediate rocks, whereas the Camas Sandstone received sediments mainly from felsic source rocks.

Translated title of the contributionGeochemistry of siliciclastic rocks of the Corral de Enmedio Formation and Camas Sandstone, Cabullona basin, Sonora: Paleoweathering and provenance
Original languageSpanish
Pages (from-to)188-202
Number of pages15
JournalRevista Mexicana de Ciencias Geologicas
Volume35
Issue number2
DOIs
StatePublished - 2018

Bibliographical note

Publisher Copyright:
© 2018 Centro de Geociencias.

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