Provenance and maximum depositional ages of Upper Triassic and Jurassic sandstone, north-eastern Mexico
Martin, Aaron (Instituto Potosino de Investigación Científica y Tecnológica. Division de Geociencias Aplicadas (Mexico))
Domènech, Mireia (Instituto Potosino de Investigación Científica y Tecnológica. Division de Geociencias Aplicadas (Mexico))
Stockli, Daniel F. (University of Texas. Department of Geological Sciences)
Gómez-Gras, David (Universitat Autònoma de Barcelona. Departament de Geologia)

Data:	2022
Resum:	Upper Triassic to lowest Upper Jurassic strata in north-eastern Mexico record surface processes during the early rifting that led to the opening of the Gulf of Mexico. Exposed near Ciudad Victoria, Tamaulipas and northwest to Galeana, Nuevo Leon, these continental deposits are called the Huizachal Group. Several key questions about these strata hamper their integration into a regional understanding of Late Triassic and Jurassic sediment routing and deposition. First, the depositional age of the stratigraphically lowest unit, the El Alamar Formation, is less well established than the depositional ages of the stratigraphically higher parts of the succession, leading to questions about the timinig of the onset of tectonic context, and regional correlation of these strata. Second, better knowledge of provenance and sediment routing, including fluvial transport distance, can help determine whether and when the depositional basin was split into subbasins versus connected by a throughgoing river system. This study uses sandstone detrital zircon U-Pb isotopic ages and clast compositions to constrain depositional ages and reconstruct tectonic setting and provenance. Detrital zircon U-Pb ages yielded a maximum depositional age of 210 Ma for the part of the El Alamar Formation exposed near Galeana, younger than previously determined. Although long-distance (.
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Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Detrital modes ; Extension ; Gulf of Mexico ; Sediment routing ; Zircon
Publicat a:	Basin Research, Vol. 34, Issue 3 (June 2022) , p. 1164-1190, ISSN 0950-091X

DOI: 10.1111/bre.12654

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Figures 13 p, 14.4 MB

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