Mesoproterozoic delta systems of the Açuruá Formation, Chapada Diamantina, Brazil

Magalhães, A.J.C.; Scherer, Claiton Marlon dos Santos; Gabaglia, Guilherme Pederneiras Raja; Catuneanu, Octavian

doi:10.1016/j.precamres.2014.11.016

Cited by 14 publications

(13 citation statements)

References 34 publications

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“…Common deltas are more consistent with fine grain sizes of FA1 (Orton & Reading, 1993) but are often linked to single thread rivers that build into distinct upward-coarsening cycles (Bhattacharya, 2010). The variable facies assemblage and lack of evidence for concave, deeply-incised channel elements (Miall, 1985) are more consistent with stratigraphic records of braid delta environments, which are characterized by more sheet-like channels and avulsion processes that can facilitate lateral and vertical associations of subenvironments within the stratigraphic record (Hadlari et al, 2006;MacNaughton et al, 1997;Magalhães et al, 2015;Muhlbauer & Fedo, 2020).…”

Section: Depositional Interpretation Of Fa1mentioning

confidence: 85%

Evolution of a Lake Margin Recorded in the Sutton Island Member of the Murray Formation, Gale Crater, Mars

Gwizd,

Fedo,

Grotzinger

et al. 2024

JGR Planets

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This study uses data from the Mars Science Laboratory Curiosity rover to document the facies of the Sutton Island member of the Murray formation, interpret paleoenvironments, and establish key stratigraphic transitions at Gale crater. Two facies associations were identified: Facies Association 1 (FA1) and Facies Association 2 (FA2). Individual facies in FA1 include planar‐laminated mudstone with minor intervals of planar sandstone, ripple cross‐laminated sandstone, cross‐stratified sandstone, and alternating laminated sandstone and mudstone. Meter‐thick packages of planar‐laminated mudstone in FA1 are interpreted to represent deposition in low‐energy ponded environments along the lake margin. Straight‐ and curve‐crested ripple cross‐laminated facies are interpreted to represent current‐influenced deposition. Cross‐stratified sandstone facies consist of dm‐thick sets that represent deposition in distal channels. Intercalated mm‐scale mudstone and sandstone laminae represent waning flow conditions and possible channel abandonment. Facies in FA1 collectively represent deposition in a distal delta plain. FA2 is comprised of planar‐laminated mudstone with minor sandstone and is interpreted to represent deposition in a lacustrine‐basin setting by suspension settling linked to density flows. FA1 transitions upward into FA2, defining a rapid transgression substantial enough to facilitate the deposition of distal lake facies above delta plain facies. The abrupt transition from FA2 back to FA1 deltaic deposits is suggestive of forced regression. Facies in FA1 and FA2 are consistent with the prevalence of aqueous environments recorded in other Murray formation members and extend our understanding of the dynamic sedimentary processes that characterized ancient lacustrine systems at Gale crater.

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Section: Depositional Interpretation Of Fa1mentioning

confidence: 85%

Evolution of a Lake Margin Recorded in the Sutton Island Member of the Murray Formation, Gale Crater, Mars

Gwizd,

Fedo,

Grotzinger

et al. 2024

JGR Planets

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“…Rapid deposition of high-density flows indicating high sedimentation rates that prevent efficient sorting (Lowe, 1988;Magalhães et al 2015).…”

Section: Fa1 Fa2mentioning

confidence: 99%

Outcrop analysis and facies model of an Upper Permian tidally influenced fluvio-deltaic system: Northern Sydney Basin, SE Australia

et al. 2019

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An integrated study of sedimentological, sequence-stratigraphic and palaeodispersal analysis was applied to the Upper-Permian clastic sedimentary succession in the Northern Sydney Basin, Australia. The succession is subdivided into fifteen facies and three facies associations. The facies associations are further subdivided into eight sub-facies associations. The sedimentary evolution involves progradation from delta-front to delta-plain to fluvial depositional environments, with a significant increase in sediment grain size across the unconformable contact that separates the deltaic from the overlying fluvial system. In contrast to the delta front that is wave/storm- and/or river-influenced, the delta plain is significantly affected by tides, with the impact of tidal currents decreasing up-sequence in the delta plain. The general lack of wave-influenced sedimentary structures suggests low wave energy in the delta plain. The abrupt termination of the tidal impact in the fluvial realm relates to the steep topographic gradients and high sediment supply, which accompanied the uplift of the New England Orogen. The sequence-stratigraphic framework includes highstand (deltaic forest and topset) and lowstand (fluvial topset) systems tracts, separated by a subaerial unconformity. In contrast to most of the mud-rich modern counterparts, this is an example of a sand-rich tidally influenced deltaic system, developed adjacent to the source region. This investigation presents a depositional model for tidal successions in regions of tectonic uplift and confinement.

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“…A representação dos geossistemas com ênfase no estudo dos recursos hídricos na bacia hidrográfica do rio Cachoeira, Brasil HEAMAN e TRINDADE, 2010;PEDREIRA, 1997;PEDREIRA e WAELE, 2008;GUADAGNIN et al ,2015;MAGALHAES et al, 2015). Esse litotipo condiciona uma hidrologia fissural, com falhas geológicas lineares, moldando em aproximadamente 78 % hidrografia para o tipo Dentrítica.…”

Section: Geoprocessamentounclassified

A Representação Dos Geossistemas Com Ênfase No Estudo Dos Recursos Hídricos Na Bacia Hidrográfica Do Rio Cachoeira, Brasil

Silva

Amorim

Rego

2018

RCG

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Estudos de Geografia Física demandam uma leitura de ambientes que conceba os atributos naturais e antrópicos como forças motrizes de sistemas que alteram, ao longo do tempo, fluxo de energia e matéria no espaço geográfico. Essa é a questão central ao qual se aplica a Teoria Geral dos Sistemas, que define os geossistemas como categoria de análise de estudos da paisagem. Considerando tal método, o objetivo central dessa pesquisa foi representar os geossistemas da bacia hidrográfica do rio Cachoeira, Nordeste do Brasil, utilizando-os como recortes para compreensão da hidrografia da área de estudo. Foram definidos 8 geossistemas que apontam interações específicas das unidades do meio físico da paisagem. As informações desses geossistemas contribuem de forma analística para a compreensão de cenários hidrológicos e produção de água numa bacia de importância socioeconomica regional.Palavras-chave: Sul da Bahia. Sistemas naturais. Estudo aplicado.

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Mesoproterozoic delta systems of the Açuruá Formation, Chapada Diamantina, Brazil

Cited by 14 publications

References 34 publications

Evolution of a Lake Margin Recorded in the Sutton Island Member of the Murray Formation, Gale Crater, Mars

Evolution of a Lake Margin Recorded in the Sutton Island Member of the Murray Formation, Gale Crater, Mars

Outcrop analysis and facies model of an Upper Permian tidally influenced fluvio-deltaic system: Northern Sydney Basin, SE Australia

A Representação Dos Geossistemas Com Ênfase No Estudo Dos Recursos Hídricos Na Bacia Hidrográfica Do Rio Cachoeira, Brasil

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