Sedimentology and sequence stratigraphy from a mixed (carbonate–siliciclastic) rift to passive margin transition: The Early to Middle Cambrian of the Argentine Precordillera

Gómez, Fernando J.; Astini, Ricardo A.

doi:10.1016/j.sedgeo.2014.11.003

Cited by 32 publications

(15 citation statements)

References 95 publications

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“…This has proven useful when age constraints are relatively loose and the exact duration of sequences is difficult or impossible to assess, and has been applied in various studies (e.g. Immenhauser et al, 2004;Amour et al, 2013;Gomez and Astini, 2015). (Fig.…”

Section: Sequence Stratigraphic Frameworkmentioning

confidence: 99%

Development of an equatorial carbonate platform across the Triassic-Jurassic boundary and links to global palaeoenvironmental changes (Musandam Peninsula, UAE/Oman)

2017

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Section: Sequence Stratigraphic Frameworkmentioning

confidence: 99%

Development of an equatorial carbonate platform across the Triassic-Jurassic boundary and links to global palaeoenvironmental changes (Musandam Peninsula, UAE/Oman)

2017

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“…2014; Bayet-Goll et al . 2015; Gomez & Astini, 2015) is suggested by the dominant mudstone fabrics, high clay content, rare skeletal remains, and lack of evidence for wave reworking, current activity or subaerial exposure. Moreover, the dolomitic ribbon rocks are associated with slumps making deposition in shallow water less probable (cf.…”

Section: Controls On the Triassic Carbonate Ramp Systemmentioning

confidence: 99%

Global, regional and local controls on the development of a Triassic carbonate ramp system, Western Balkanides, Bulgaria

Chatalov

2016

Geol. Mag.

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The Early to Late Triassic development of a carbonate ramp system in the subtropical belt of the NW Tethys was controlled by the interplay of several global and regional factors: geotectonic setting (slow continuous subsidence on a passive continental margin), antecedent topography (low-gradient relief inherited from preceding depositional regime), climate and oceanography (warm and dry climatic conditions, storm influence), relative sea-level changes (Olenekian to Anisian eustatic rise, middle Anisian to early Carnian sea-level fall), lack of frame-builders (favouring the maintenance of ramp morphology), and carbonate production (abundant formation of lime mud, non-skeletal grains and marine cements, development of diverse biota controlled by biological evolution and environmental conditions). Elevated palaeorelief affected the ramp initialization on a local scale, while autogenic processes largely controlled the formation of peritidal cyclicity during the early stage of ramp retrogradation. Probably fault-driven differential subsidence caused a local distal steepening of the ramp profile in middle–late Anisian time. The generally favourable conditions promoted long-term maintenance of homoclinal ramp morphology and accumulation of carbonate sediments having great maximum thickness (~500 m). Shutdown of the carbonate factory and demise of the ramp system in the early Carnian resulted from relative sea-level fall and subsequent emergence. After a period of subaerial exposure with minor karstification, the deposition of continental quartz arenites suggests the possible effect of the Carnian Pluvial Episode.

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“…2) Gomez and Astini, 2015). The dominantly limestone formation contains thin interbeds of quartzose sandstone and sandy limestone in the lower part, as well as a massive quartzose sandstone unit ~15 m thick.…”

Section: Recycled Cambrian Passive-margin Platform Rocks Of the Precomentioning

confidence: 99%

Detrital-zircon geochronology and provenance of the Ocloyic synorogenic clastic wedge, and Ordovician accretion of the Argentine Precordillera terrane

et al. 2015

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The Precordillera terrane in northwestern Argentina is interpreted to be an exotic (Laurentian) continental fragment that was accreted to western Gondwana during the Ordovician. One prominent manifestation of the subduction and collision process is a Middle-Upper Ordovician clastic wedge, which overlies a passive-margin carbonate-platform succession in the Precordillera. U/Pb ages of detrital zircons from sandstones within the clastic wedge, as well as zircons from clasts within conglomerates, provide documentation for the composition of the sediment provenance. The ages of detrital zircons are consistent vertically through the succession, as well as laterally along and across strike of the Precordillera, indicating a single, persistent sediment source throughout deposition of the clastic wedge. The dominant mode (~1350-1000 Ma) of the detrital-zircon ages corresponds to the ages of basement rocks in the Western Sierras Pampeanas along the eastern side of the Precordillera. A secondary mode (1500-1350 Ma) corresponds in age to the Granite-Rhyolite province of Laurentia, an age range which is not known in ages of basement rocks of the Western Sierras Pampeanas; however, detritus from Granite-Rhyolite-age rocks in the basement of the Precordillera was available through recycling of synrift and passive-margin cover strata. Igneous clasts in the conglomerates have ages (647-614 Ma) that correspond to the ages of minor synrift igneous rocks in the nearby basement massifs; the same ages are represented in a minor mode (~750-570 Ma) of detrital-zircon ages. A quartzite clast in a conglomerate, as well as parts of the population of detrital zircons, indicates the importance of a source in the metasedimentary cover of the leading edge of the Precordillera. The Famatina continental-margin magmatic arc reflects pre-collision subduction of Precordillera lithosphere beneath the western Gondwana margin; however, no detrital zircons have ages that correspond to Famatina arc magmatism, indicating that sedimentary detritus from the arc may have been trapped in a forearc basin and did not reach the foreland. The indicators of sedimentary provenance for the foreland deposits are consistent with subduction of the Precordillera beneath western Gondwana, imbrication of basement rocks from either the Precordillera or Gondwana into an accretionary complex, and recycling of deformed Precordillera cover rocks.

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Sedimentology and sequence stratigraphy from a mixed (carbonate–siliciclastic) rift to passive margin transition: The Early to Middle Cambrian of the Argentine Precordillera

Cited by 32 publications

References 95 publications

Development of an equatorial carbonate platform across the Triassic-Jurassic boundary and links to global palaeoenvironmental changes (Musandam Peninsula, UAE/Oman)

Development of an equatorial carbonate platform across the Triassic-Jurassic boundary and links to global palaeoenvironmental changes (Musandam Peninsula, UAE/Oman)

Global, regional and local controls on the development of a Triassic carbonate ramp system, Western Balkanides, Bulgaria

Detrital-zircon geochronology and provenance of the Ocloyic synorogenic clastic wedge, and Ordovician accretion of the Argentine Precordillera terrane

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