Depositional controls on lacustrine coquinas from an early cretaceous rift lake: Morro do Chaves Formation, Northeast Brazil

Favoreto, Júlia; Valle, Bruno; Borghi, Leonardo; Bó, Patrick Führ Dal’; Mendes, M. A. S.; Arena, Michele; Santos, Jorge Gomes; Santos, Hélisson Nascimento dos; Ribeiro, Carolina da Silva; Coelho, Pedro

doi:10.1016/j.marpetgeo.2020.104852

Cited by 15 publications

(8 citation statements)

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“…More broadly, the concepts of climate control on the development of lacustrine depositional sequences could have important applications in the interpretation of vertical facies variations in different syn‐rift or post‐rift lake systems with variable salinity, and with different degrees of connection with neighbouring lakes: for example, early Cretaceous syn‐rift lakes from the Sergipe‐Alagoas basin, Brazil (Favoreto et al ., 2021), Aptian post‐rift lake from the Tucano Basin, Brazil (Varejão et al ., 2019), Plio‐Pleistocene from the East African Rift (Bergner et al ., 2009; Nutz et al ., 2017), early Cretaceous lakes from the Jiuquan rift basin, China (Zhang et al ., 2018) and Priabonian and Oligocene rift basins from France [Vistrenque Basin – Benedicto et al ., 1996; Valence Basin – Dromart & Dumas, 1997; Bresse and Upper Rhine Graben (URG) – Busson et al ., 1992].…”

Section: Discussionmentioning

confidence: 99%

“…In addition to sequence stratigraphic analysis, the interactions between structural and climatic controls on depositional profiles and stratigraphic architecture in lacustrine rift basins are gaining increasing attention (Bergner et al ., 2009; Nutz et al ., 2017, 2019; Newell, 2018; Zhang et al ., 2018, 2020; Rohais et al ., 2019; Favoreto et al ., 2021). However, various knowledge gaps still exist regarding the relative impact of climate and tectonics on lacustrine depositional models and on the development of transgressive–regressive cycles in saline lakes from ancient and modern rift and post‐rift basins (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Stratigraphic architecture of a saline lake system: From lake depocentre (Alès Basin) to margins (Saint‐Chaptes and Issirac basins), Eocene–Oligocene transition, south‐east France

et al. 2021

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Changes in sedimentary profiles and stratigraphic architecture over time in lake basins are shown to be relevant markers of climate changes in terrestrial palaeoenvironments. The stratigraphic architecture of the Priabonian (late Eocene)–early Rupelian (early Oligocene) Alès–Saint‐Chaptes–Issirac saline lake system has been reconstructed from the sedimentological, biostratigraphic and magnetostratigraphic analysis of outcrops and well cores. As a function of the inflow–evaporation balance, three distinct depositional models have been proposed for the Priabonian Alès–Saint‐Chaptes–Issirac lake system which is characterized by both fault‐controlled and low‐angle ramp‐like margins: (i) freshwater to oligohaline lake; (ii) oligohaline to mesohaline closed‐lake; and (iii) hypersaline, evaporitic closed‐lake. Two major stages of lake spreading (possibly middle Priabonian and late Priabonian–early Rupelian) separated by two stages of significant lake closure represented by evaporite succession in the Alès Basin depocentre (middle to late Priabonian) have been evidenced. Regional tectonics and climate induced changes in inflow–evaporation balance of the lake and controlled the development of transgressive–regressive cycles with calcium‐sulphate sedimentation during regression in the lake depocentre (Alès Basin) and during early transgression in lake margins (Saint‐Chaptes and Issirac basins). The correlation between the palaeohydrological cycles inferred for the Alès–Saint‐Chaptes–Issirac lake system and the regional climate changes of Priabonian stage, prior to the Eocene–Oligocene transition, strongly suggests that climate significantly impacted the nature of lacustrine depositional models and the depositional architecture of Palaeogene, syn‐rift, saline lake basins from Western Europe.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Stratigraphic architecture of a saline lake system: From lake depocentre (Alès Basin) to margins (Saint‐Chaptes and Issirac basins), Eocene–Oligocene transition, south‐east France

et al. 2021

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“…Rock Type 1 (RT-1) was represented by the Muddy Dispersestone (Md) lithology (Dal'Bó et al 2021), which was composed of more than 85% matrix (clay and silt) and less than 15% bioclasts, regardless of size and fragmentation degree, and with dispersed concentrations of articulated shells. Rock Type 2 (RT-2) was represented by the Sandy Dispersestone (Sd) lithology, which was composed of 90% or more of siliciclastic fine grains and less than 10% of bioclast fragments, regardless of size or shell fragmentation degree (Favoreto et al 2021). RT-2 was also represented by the Sandy Loosestone (sL) lithology, which was composed of 50 to 85% of fine siliciclastic sand grains and 15 to 50% of disarticulated shells.…”

Section: Rock Typesmentioning

confidence: 99%

“…To evaluate the distribution of the intervals with the best and worst reservoir characteristics, the wells were correlated based on interpretations of Gamma Ray logs, Density, Rock Types, photoelectric factor, and porosity and permeability logs (Figure 8). Thus, two maximum flooding surfaces (MFS) correlated across the wells were interpreted, the lower MFS-P and upper MFS-C, which separate the Morro do Chaves Formation from Penedo and Coqueiro Seco Formations, respectively (Favoreto et al 2021). To refine the correlation across the wells, three other internal surfaces were interpreted as flood surfaces (FS), two of which (FS-1L and FS-2L) in the lower section of the Morro do Chaves Formation.…”

Section: Permeability Log Calculationmentioning

confidence: 99%

“…In the studied area, the Morro do Chaves Formation is around 200 m thick (Rigueti et al 2020) and characterized by interlayers of coquinas, sandstones, and shales. These, in turn, characterize a mixed depositional paleoenvironment, where typical carbonate and siliciclastic depositional processes occur in a dynamic environment (Azambuja, Arienti & Cruz 1998;Favoreto et al 2021;Rigueti et al 2020;Tavares et al 2015). However, lithofaciological analysis alone does not reflect all potential conditions in this reservoir in the Morro do Chaves Formation, besides being insufficient to define permeability-porosity characteristics within this interval, mainly where rocks were strongly influenced by diagenesis.…”

Section: Introductionmentioning

confidence: 99%

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Petrophysical Characterization and porosity-permeability log calculation by Dual-Energy CT scan: Morro do Chaves Formation, Sergipe-Alagoas Basin, Brazil

Mendes

Favoreto

Nunes

et al. 2023

Anu. Inst. Geociênc.

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Considered important analogues of pre-salt reservoirs in hydrocarbon-producing basins throughout eastern Brazilian shore, the coquinas of the Morro do Chaves Formation (Barremian-Aptian of the Sergipe-Alagoas Basin) were studied in this work from a petrophysical standpoint using advanced characterization methods for cores recovered from four wells (2-SMC-01-AL, 2-SMC-02-AL, 2-SMC-03-AL e 2-SMC-01-AL) drilled in the Atoll Quarry, which is located in city of São Miguel dos Campos, Alagoas State, Brazil. To understand the relationships between lithological and diagenetic heterogeneities that control the distribution of permeability-porosity properties of this rock type, the cores underwent Dual-Energy X-ray imaging, which determines bulk density and photoelectric factor data to define seven rock types and generate effective porosity curves for the studied wells. Permeabilities in wells were modeled based on the Flow Zone Index (FZI) concept, and each reservoir interval based on the Global Hydraulic Elements (GHEs) approach. Results were calibrated with laboratory measurements in plugs, and porosity was classified by petrographic analysis by Digital Image Analysis (DIA). All wells were correlated and four internal flooding surfaces identified, with a regressive surface (RS) dividing the Morro do Chaves Formation into an upper section with better reservoir characteristics and a lower one with worse ones.

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Facies distribution and depositional cycles in lacustrine and palustrine carbonates: The Lutetian–Aquitanian record in the Paris Basin

Moreau,

Andrieu,

Briais

et al. 2023

The Depositional Record

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The difficulty of correlating continental deposits hinders predicting lacustrine and palustrine carbonate facies variations in time and space. This study aims to understand better the factors governing these facies heterogeneities by measuring carbonate isotopes and conducting facies, petrographic and sequence stratigraphic analyses of the Lutetian–Aquitanian deposits of the Paris Basin, that record the transition from marine to lacustrine environments. Large‐scale correlations enabled the definition of two lacustrine–palustrine carbonate facies models. (1) The coastal lacustrine system (Bartonian to Rupelian), consists of fine‐grained brackish carbonate exhibiting episodic marine inputs during short‐term relative sea‐level maxima and evaporite sedimentation during relative sea‐level minima. Lacustrine sediments differ notably from marine ones with more negative δ13C and δ18O compositions that co‐vary and a biota adapted to low salinity conditions. In the associated palustrine environment, depositional sequences evolve upwards from micritic lacustrine deposits to nodular and then laminar calcretes. Microbial‐coated grains and rhizoliths indicate biological processes during repeated subaerial exposure phases in sub‐tropical to arid climates. (2) The inland lacustrine system (Rupelian and Aquitanian) was disconnected from the marine domain and showed evidence of microbial activity with microbial crusts and oncoidal rudstones. Facies rich in micritic intraclasts composed of palustrine and lacustrine facies indicate the reworking of already lithified sediments along the margins. In the palustrine domain, the calcrete facies are less abundant than breccias formed in‐situ by desiccation, limestones with root traces, or organic‐rich wackestones and marls. This system reflects a more temperate climate with more developed microbial structures and less exposed carbonates than the coastal lacustrine system. The southward migration of the depocentre and the transition from marine environments to (1) coastal and then (2) inland systems are controlled by uplift phases induced by Pyrenean and Alpine orogenesis. Third‐order relative sea‐level variations appear to control only short‐term cycles in coastal systems.

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Depositional controls on lacustrine coquinas from an early cretaceous rift lake: Morro do Chaves Formation, Northeast Brazil

Cited by 15 publications

References 45 publications

Stratigraphic architecture of a saline lake system: From lake depocentre (Alès Basin) to margins (Saint‐Chaptes and Issirac basins), Eocene–Oligocene transition, south‐east France

Stratigraphic architecture of a saline lake system: From lake depocentre (Alès Basin) to margins (Saint‐Chaptes and Issirac basins), Eocene–Oligocene transition, south‐east France

Petrophysical Characterization and porosity-permeability log calculation by Dual-Energy CT scan: Morro do Chaves Formation, Sergipe-Alagoas Basin, Brazil

Facies distribution and depositional cycles in lacustrine and palustrine carbonates: The Lutetian–Aquitanian record in the Paris Basin

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