Sedimentology and Sequence Stratigraphy of the Agrio Formation (Late Valanginian–Earliest Barremian) and the Closure of the Mendoza Group to the North of the Huincul High

Pazos, Pablo J.; Comerio, Marcos; Fernández, Diana Elizabeth; Gutiérrez, Carolina; Estebenet, M. Candela González; Heredia, Arturo Miguel

doi:10.1007/978-3-030-29680-3_10

Cited by 8 publications

(3 citation statements)

References 51 publications

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“…2013), organized in asymmetrical transgressive‐highstand systems tracts (Pazos et al . 2020). Sq‐II and Sq‐III present offshore to shoreface deposits including upper shoreface intervals (Guler et al .…”

Section: Geological Settingmentioning

confidence: 99%

A micromorphological analysis of Bolonia lata Meunier from the Cretaceous of the Neuquén Basin (Patagonia, Argentina): new insights into the tracemaker

Giachetti,

Fernández,

Comerio

et al. 2023

Papers in Palaeontology

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Polychaetes, echinoids and gastropods have been proposed as tracemakers for Bolonia Meunier, an elongate positive epirelief trace fossil characterized by two lobes composed of biserial, subtriangular pads and a mostly heart‐shaped cross‐section. Here, the internal structure and micromorphology of Bolonia are described for the first time using serial thin sections from shallow‐marine Lower Cretaceous intervals of the Agrio Formation (Neuquén Basin, Argentina). In vertical thin sections, a conical structure of variable width extends centrally from the base to the top of the trace. In horizontal thin sections, grains are reoriented and reworked, forming a central zigzag structure. The organic matter and clays form grain aggregates representing the internal structure of individual pads of the trace fossil. The sediment has mostly been reoriented, with grains making up subcircular pods. We interpret the central conical structure as the collapse of the medial zone of the trace fossil, which could have destroyed drain tubes, especially in the absence of early cementation. Studying horizontal thin sections, we reconstruct the diagnostic biserial pads as biserial concave structures. These are interpreted as backfilling structures produced by the aboral and lateral spines of irregular echinoids, which worked together to compact the sediment anteroposteriorly and moved alternatively, explaining the zigzag pattern in the menisci. We propose Spatangoidea or Cassiduloidea (or a closely related group) with a similar burrowing ability and spine movement as tracemakers of these Bolonia specimens.

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Section: Geological Settingmentioning

confidence: 99%

A micromorphological analysis of Bolonia lata Meunier from the Cretaceous of the Neuquén Basin (Patagonia, Argentina): new insights into the tracemaker

Giachetti,

Fernández,

Comerio

et al. 2023

Papers in Palaeontology

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“…The Agrio Fm includes two organic-rich intervals of late Valanginian and late Hauterivian age (e.g. Comerio et al, 2018;Pazos et al, 2020;Uliana & Legarreta, 1993). TOC content ranges from 1% to 5% with peak values of up to 16%, including type II and III kerogens (Comerio et al, 2018(Comerio et al, , 2020Legarreta & Villar, 2012), with average measured HI 0 of 600 mg HC /g TOC for the type II intervals (Spacapan et al, 2018).…”

Section: Source Rocks: An Overviewmentioning

confidence: 99%

Integrated source rock evaluation along the maturation gradient. Application to the Vaca Muerta Formation, Neuquén Basin of Argentina

Spacapan

Comerio

Brisson³

et al. 2021

Basin Research

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The Vaca Muerta Formation (Tithonian-early Valanginian) is the main source rock in the Neuquén Basin and the most important unconventional shale resource in South America. In the present study, organic geochemistry, electron microscopy and basin and petroleum system modelling (BPSM) were combined to evaluate source rock properties and related processes along a transect from the early oil (east) to the dry gas (west) window. The unit is characterized by high present-day (1%-8% average) and original (2%-16% average) total organic carbon contents, which increase to-

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“…The upper Mendoza Group (Franzese & Spalletti, 2001; Franzese et al., 2003), represents the flooding of the Neuquén basin due to a thermal subsidence, event during the Late Jurassic‐Early Cretaceous, contemporaneous to a post‐rift phase (Howell et al., 2005; Pazos et al., 2020; Scivetti & Franzese, 2019). The Lo Valdes Formation overlies the Río Damas Formation, and is composed mainly by limestones and andesites (González, 1963; Hallam et al., 1986, Salazar & Stinnesbeckb, 2015).…”

Section: Geological Settingmentioning

confidence: 99%

Architecture, Kinematics, and Tectonic Evolution of the Principal Cordillera of the Andes in Central Chile (∼33.5°S): Insights From Detrital Zircon U‐Pb Geochronology and Seismotectonics Implications

et al. 2021

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Latitudinal variations in the amount of tectonic shortening and deformation style may have been controlled by regional heterogeneities in the upper continental crust and subducted slab (Jordan et al., 1983;Mpodozis & Ramos, 1989). Among these, the Pampean flat-slab subduction zone (27°S-33°S) is one of the most remarkable features in this orogen (Cahill & Isacks, 1992;Gutscher et al., 2000). It is characterized by a series of tectonic domains, with an accretionary wedge in the Coastal Cordillera, Quaternary deposits in the Central Valley, a hybrid thrust belt in the Principal Cordillera, a rigid block uplift in the Frontal Cordillera, basement uplift in the Precordillera and the Sierras Pampeanas, and a series of Neogene-Quaternary broken foreland basins (

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Sedimentology and Sequence Stratigraphy of the Agrio Formation (Late Valanginian–Earliest Barremian) and the Closure of the Mendoza Group to the North of the Huincul High

Cited by 8 publications

References 51 publications

A micromorphological analysis of Bolonia lata Meunier from the Cretaceous of the Neuquén Basin (Patagonia, Argentina): new insights into the tracemaker

A micromorphological analysis of Bolonia lata Meunier from the Cretaceous of the Neuquén Basin (Patagonia, Argentina): new insights into the tracemaker

Integrated source rock evaluation along the maturation gradient. Application to the Vaca Muerta Formation, Neuquén Basin of Argentina

Architecture, Kinematics, and Tectonic Evolution of the Principal Cordillera of the Andes in Central Chile (∼33.5°S): Insights From Detrital Zircon U‐Pb Geochronology and Seismotectonics Implications

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