Mesozoic exhumation history of the Grenvillian Oaxacan Complex, southern Mexico

Abdullin, Fanis; Solari, Luigi; Solé, Jesús; Ortega‐Obregón, Carlos

doi:10.1111/ter.12493

Cited by 10 publications

(9 citation statements)

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“…13C). Such a scenario is supported by the apatite and titanite fission-track data of Abdullin et al (2020), which indicate that the Oaxacan Complex was episodically exhumed between Late Triassic and Middle Jurassic time along the Caltepec fault (Figs. 1 and 13C) as a result of crustal extension associated with Pangea breakup.…”

Section: Main Boundaries and Internal Architecture Of The Tlaxiaco Basinmentioning

confidence: 80%

Reconstructing the tectono-sedimentary evolution of the Early–Middle Jurassic Tlaxiaco Basin in southern Mexico: New insights into the crustal attenuation history of southern North America during Pangea breakup

et al. 2021

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During Pangea breakup, several Jurassic extensional to transtensional basins were developed all around the world. The boundaries of these basins are major structures that accommodated continental extension during Jurassic time. Therefore, reconstructing the geometry of Jurassic basins is a key factor in identifying the major faults that produced continental attenuation during Pangea breakup. We reconstruct the tectono-sedimentary evolution of the Jurassic Tlaxiaco Basin in southern Mexico using sedimentologic, petrographic, and U-Pb geochronologic data. We show that the northern boundary of the Tlaxiaco Basin was an area of high relief composed of the Paleozoic Acatlán Complex, which was drained to the south by a set of alluvial fans. The WNW-trending Salado River–Axutla fault is exposed directly to the north of the northernmost fan exposures, and it is interpreted as the Jurassic structure that controlled the tectono-sedimentary evolution of the Tlaxiaco Basin at its northern boundary. The eastern boundary is represented by a topographic high composed of the Proterozoic Oaxacan Complex, which was exhumed along the NNW-trending Caltepec fault and was drained to the west by a major meandering river called the Tlaxiaco River. Data presented in this work suggest that continental extension during Pangea breakup was accommodated in Mexico not only by NNW-trending faults associated with the development of the Tamaulipas–Chiapas transform and the opening of the Gulf of Mexico, but also by WNW-trending structures. Our work offers a new perspective for future studies that aim to reconstruct the breakup evolution of western equatorial Pangea.

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Section: Main Boundaries and Internal Architecture Of The Tlaxiaco Basinmentioning

confidence: 80%

Reconstructing the tectono-sedimentary evolution of the Early–Middle Jurassic Tlaxiaco Basin in southern Mexico: New insights into the crustal attenuation history of southern North America during Pangea breakup

et al. 2021

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“…Boxes limiting possible solutions to the t-T models (Fig. 5) were added based on known and reasonable geological constraints (Abdullin et al 2016(Abdullin et al , 2018(Abdullin et al , 2021; A. M. Bedoya-Mejía, unpub. M.Sc.…”

Section: Apatite Fission-track Resultsmentioning

confidence: 99%

“…To detect Late Cretaceous and Cenozoic cooling ages, we sampled those areas that are close to key regional structures (Figs 2, 3), as was recommended by Abdullin et al (2021). A total of four augen gneiss samples were collected from the Esperanza Granitoids in the The Laramide event in southern Mexico western sector (EG-1, EG-2, EG-3 and EG-4; Fig.…”

Section: Samples and Methodsmentioning

confidence: 99%

“…He dating and fission-track analysis) have been applied sparsely to elucidating the timing of exhumation periods in the Sierra Madre del Sur (Ducea et al 2004;Abdullin et al 2021;Ramírez-Calderón et al 2021). For example, Abdullin et al (2021) reported apatite fission-track (AFT) data from the northern-central Grenvillian Oaxacan Complex and identified two Mesozoic cooling periods that were interpreted as resulting from exhumation: a Middle Triassic to Middle Jurassic cooling event that is probably linked to the break-up of Pangaea, and a younger one related to an exhumation episode during Early Cretaceous time that is coeval with the final stages of rifting of the Gulf of Mexico. Ramírez-Calderón et al (2021) also detected Triassic-aged cooling signals from the Pennsylvanian-Cisuralian Totoltepec pluton, northeastern Acatlán Complex.…”

Section: Introduction and Objectivementioning

confidence: 99%

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Detecting the Laramide event in southern Mexico by means of apatite fission-track thermochronology

et al. 2022

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In this study, we present apatite fission-track results obtained for ten rock samples collected from three different areas across the Sierra Madre del Sur, southern Mexico. The central objective of our study is the timing of the exhumation event that took place in southern Mexico during Late Cretaceous–Palaeogene time. The thermochronometric data obtained during this work indicate that a Late Cretaceous–Eocene cooling is recorded within the Sierra Madre del Sur, and this is interpreted as resulting from exhumation, an orogenic event that is contemporaneous with the Laramide sensu lato (or the Mexican Orogeny). The fission-track ages become younger from west to east across the Sierra Madre del Sur, whereas the cooling rates also increased in the same direction approximately during Campanian–middle Eocene time. Here, we suggest that the activity of the major fault systems of southern Mexico, such as the Caltepec and the Oaxaca faults, played a primary role in the development of geological structures and the exhumation of the Sierra Madre del Sur. Active magmatism during the evolution of the Mexican Orogen implicates the subducted Farallon slab as the main driver of crustal thickening. Moreover, the possible influence of the eastward movement of the Chortis Block on the deformation of the Sierra Madre del Sur cannot be ruled out.

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“…The presence of an angular unconformity between the La Joya Formation and underlying strata, as well as within the El Alamar and La Boca formations, requires active tectonics during deposition of these three formations. Based on plate motion models, Muller et al South America support the interpretation that separation between North and South America, and related tectonism of the smaller continental blocks between them, was underway by Late Triassic time (Abdullin et al, 2021;Cochrane et al, 2014;Gomez et al, 2021;Maldonado et al, 2018;Ramirez-Calderon et al, 2021). The El Alamar Formation was deposited after 210 Ma, after the onset of divergence and rifting in the region, so the El Alamar Formation probably was deposited in a nascent rift basin (Figure 12).…”

Section: Tectonic Setting and Drainage Network Size During Deposition...mentioning

confidence: 87%

Provenance and maximum depositional ages of Upper Triassic and Jurassic sandstone, north‐eastern Mexico

et al. 2022

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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 (>100 km) sediment transport cannot be ruled out, the sources for Huizachal Group sandstone framework grains and detrital zircon could have been entirely local, within about 100 km. Alluvial deposits and pyroclastic and lava flows likewise indicate transport of no more than 100 km. We therefore infer deposition in partitioned rift basins receiving sediment from local sources. These data and interpretations contribute to understanding surface processes during the initial rifting that eventually led to opening of the Gulf of Mexico.

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Mesozoic exhumation history of the Grenvillian Oaxacan Complex, southern Mexico

Cited by 10 publications

References 54 publications

Reconstructing the tectono-sedimentary evolution of the Early–Middle Jurassic Tlaxiaco Basin in southern Mexico: New insights into the crustal attenuation history of southern North America during Pangea breakup

Reconstructing the tectono-sedimentary evolution of the Early–Middle Jurassic Tlaxiaco Basin in southern Mexico: New insights into the crustal attenuation history of southern North America during Pangea breakup

Detecting the Laramide event in southern Mexico by means of apatite fission-track thermochronology

Provenance and maximum depositional ages of Upper Triassic and Jurassic sandstone, north‐eastern Mexico

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