Fluvial-aeolian interaction deposits in the Andean Foreland basin (Northwest Argentina): Architecture and facies model

Bernárdez, S. Salvo; Medina, Peter Zabala; Limarino, Carlos Óscar; Bonomo, Néstor; Osella, A.

doi:10.1016/j.aeolia.2021.100754

Cited by 3 publications

(2 citation statements)

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“…Al‐Masrahy and Mountney (2015) established a generalized framework to classify 10 types of fluvial‐aeolian interactions based on modern dune‐field margins and proposed that these interactions can change either gradationally or abruptly over short periods and distances. While such a classification can be derived from modern fluvial‐aeolian systems, fluvial‐aeolian interactions are difficult to identify within the geological record (Bernárdez et al., 2022; Xu et al., 2019; Zhu et al., 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Fluvial‐aeolian interaction is an important process controlling sediment routing systems in arid and semiarid lands (Bernárdez et al., 2022; Bullard & Livingstone, 2002; Chanteloube et al., 2022; Langford, 1989; Langford & Chan, 1989; Ramsey et al., 1999; Williams, 2015) as it contributes to the complexity of the fluvial‐aeolian system dynamics (Bruner et al., 2022; Jolivet et al., 2021, 2022), such as the river shifting induced by the progradation of aeolian dunes (Jolivet et al., 2022). Influenced by autocyclic processes like bed‐form migration and allocyclic processes such as changes in the water table and sediment supply (Mountney, 2006), aeolian deposits serve as both a source and a sink for fluvial sediments (Roskin et al., 2014).…”

Section: Introductionmentioning

confidence: 99%

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A fluvial‐aeolian system in response to aridification during the Late Mesozoic, Junggar Basin, Central Asia

Guan,

Wu,

et al. 2024

Basin Research

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Aridification of Central Asia in the Late Mesozoic led to drastic environmental changes characterized by widespread aeolian deposits. We systematically investigated fluvial‐aeolian deposits in the Middle Jurassic Toutunhe Formation, Upper Jurassic Kalazha Formation, and Lower Cretaceous Tugulu Group in the Junggar Basin to the north of the Tianshan Orogenic Belt via unmanned aerial vehicle‐based photogrammetry, scanning electron microscope, grain‐size analysis, and detrital zircon geochronology. Paludal and deltaic environments transitioned to a fluvial‐aeolian environment from the late Middle Jurassic to the Late Jurassic. Fan delta and incisive braided river deposits accumulated in the earliest Cretaceous and evolved into a lacustrine environment with aeolian deposits in the lakeshore. Aeolian deposits are characterized by moderate‐ to well‐sorted and subangular to subround sandstones with large‐scale, high‐dip cross‐bedding, inversely graded lamination, dominant saltation grains, crescent‐shaped, and dish‐shaped impact structures. Aeolian deposits contain heavy minerals including more ilmenite, zircon, garnet, and, tourmaline and less magnetite and epidote than the fluvial deposits. The preserved aeolian sediments of the Kalazha Formation extend west–east for more than 100 km, suggesting a wide desert area during the latest Jurassic. The detrital zircon age patterns indicate that the provenance of the aeolian deposits was similar to that of coeval fluvial deposits. The cooccurrence of fluvial and aeolian deposits and the similar provenances but orthogonal flow directions indicate that the aeolian deposits were mainly sourced from the nearby fluvial material within the basin. The evolution of the fluvial‐aeolian system responded to a complete base‐level cycle controlled by the aridification and tectonics. Due to decreased sediment supply caused by aridification, the base level rose, leading to the change from braided rivers to meandering rivers, along with the deposition of aeolian sediments. Due to the tectonic reactivation in the Late Jurassic, the base level fell, causing the occurrence of alluvial fans and the expansion of the aeolian sediments. Previous studies revealed that the Tianshan in the Jurassic exhibited low relief. The fluvial‐aeolian system played an important role in maintaining the limited relief in southern Central Asia.

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