Origin, Depositional Setting and Stratigraphic Implications of Palaeogene Glauconite of Kutch

Chattoraj, Shovan Lal; Banerjee, Santanu; Saraswati, Pratul Kumar; Bansal, Udita

doi:10.17491/cgsi/2016/105413

Cited by 7 publications

(15 citation statements)

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“…& Singh, 2017). The Paleogene succession of Kutch rests unconformably on Deccan basalt in most places, consisting of three sequences, separated by four regional unconformities (Chattoraj et al, 2016) (Figure 2). The poorly fossiliferous Matanomadh Formation, comprising weathered basalts, lithic sandstone, siltstone and shale occur locally.…”

Section: Geological and Stratigraphic Framework Of Carbonatesmentioning

confidence: 99%

“…The transgressive trend continues up to the base of the Fulra Limestone (Figure 3(a)). The latter represents an overall shallowing upward trend (Chattoraj, Banerjee, Saraswati, & Bansal, 2016;Saraswati et al, 2016). A prominent paleokarst surface marks the boundary between the Fulra Limestone and the Maniyara Fort Formation (Figure 3(b)) (Banerjee, Chattoraj, Saraswati, Dasgupta, & Sarkar, 2012b;Chattoraj et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…The latter represents an overall shallowing upward trend (Chattoraj, Banerjee, Saraswati, & Bansal, 2016;Saraswati et al, 2016). A prominent paleokarst surface marks the boundary between the Fulra Limestone and the Maniyara Fort Formation (Figure 3(b)) (Banerjee, Chattoraj, Saraswati, Dasgupta, & Sarkar, 2012b;Chattoraj et al, 2016). The bottom part of the Maniyara Fort Formation records a transgressive deposit consisting of glauconitic shale and nummulitic grainstone (Banerjee et al, 2012b).…”

Section: Introductionmentioning

confidence: 99%

“…The sequence stratigraphic framework of the Paleogene sedimentary record of Kutch was presented in a few publications (2012b; Banerjee et al, 2012a;Chattoraj et al, 2009Chattoraj et al, , 2016Sarkar et al, 2012;…”

Section: Introductionmentioning

confidence: 99%

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Facies and depositional settings of the Middle Eocene-Oligocene carbonates in Kutch

2018

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Middle Eocene Fulra Limestone and Oligocene Maniyara Fort Formation represent platform carbonate deposits of Kutch at the northwestern margin of India. These carbonates contain larger benthic foraminifera, including Alveolina, Assilina, Discocyclina, Lepidocyclina, Miogypsina, Nummulites and Spiroclypeus. This study presents paleodepositional and paleobathymetric interpretations for both formations using benthic foraminifera in combination with lithological association, sedimentary structures and early diagenetic features. The six carbonate facies comprising the Fulra Limestone indicate a depositional spectrum ranging from bar-lagoon to mid-ramp depositional conditions. It records several shallowing upward cycles, leading to emergence and formation of paleokarst. The four carbonate facies of the Maniyara Fort Formation represents deposition within the inner ramp setting in bar-lagoon and patch-reef environment, while intervening fine siliciclastics correspond to episodes of relative sea level fall. Nummulitic accumulations form low-relief bars within the fair weather wave base in both the formations. The depositional setting of the Paleogene carbonate in Kutch broadly resembles Eocene platformal deposits in the circum-Tethys belt.

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Section: Geological and Stratigraphic Framework Of Carbonatesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Facies and depositional settings of the Middle Eocene-Oligocene carbonates in Kutch

2018

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“…The 'low rate' of element sequestration may re ect reverse weathering processes taking place in depositional systems that are characterized by high sedimentation rates and a short residence time at the sediment-seawater interface. Authigenic clay precipitation is ine cient under such conditions (Amorosi, 2012;Chattoraj et al, 2016) so that element sequestration is reduced. The 'high rate' of element sequestration may represent transgressive systems that are characterized by low to close to zero overall sedimentation and a prolonged residence time at the sediment-seawater interface, which favor glauconite formation (Amorosi, 2012;Banerjee et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

Impact of green clay authigenesis on K–Mg–Fe sequestration in marine settings

Baldermann

Banerjee

Czuppon

et al. 2021

Preprint

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Retrograde clay mineral reactions (i.e., reverse weathering), including glauconite formation, are first-order controls on element (re)cycling vs sequestration in modern and ancient marine sediments. Here, we report substantial K–Mg–Fe sequestration by glauconite formation in shallow marine settings from the Triassic to the Holocene, averaging 4 ± 3 mmol K·cm−²·kyr− 1, 4 ± 2 mmol Mg·cm−²·kyr− 1 and 10 ± 6 mmol Fe·cm−²·kyr− 1, which is ~ 2 orders of magnitude higher compared to deep-sea settings. Upscaling of glauconite abundances in shallow-water (< 200 m) environments predicts a global K–Mg–Fe uptake of ~ 0.05–0.06 Tmol K·yr− 1, ~ 0.04–0.06 Tmol Mg·yr− 1 and ~ 0.11–0.14 Tmol Fe·yr− 1. We conclude that authigenic clay elemental uptake had a large impact on the global marine K, Mg and Fe cycles throughout Earth`s history, in particular during ‘greenhouse’ periods with sea level highstand. Quantifying authigenic clay formation is key for better understanding past and present geochemical cycling in marine sediments.

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Origin and significance of glauconites in a sequence stratigraphic perspective: Sylhet Formation, Assam and Assam–Arakan Basin, India

2022

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Origin, Depositional Setting and Stratigraphic Implications of Palaeogene Glauconite of Kutch

Cited by 7 publications

References 0 publications

Facies and depositional settings of the Middle Eocene-Oligocene carbonates in Kutch

Facies and depositional settings of the Middle Eocene-Oligocene carbonates in Kutch

Impact of green clay authigenesis on K–Mg–Fe sequestration in marine settings

Origin and significance of glauconites in a sequence stratigraphic perspective: Sylhet Formation, Assam and Assam–Arakan Basin, India

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