The Variability of Micaceous Minerals in Sedimentary Rocks

Kossovskaya, A.G.; Drits, Victor A.

doi:10.1111/j.1365-3091.1970.tb00207.x

Cited by 46 publications

(28 citation statements)

References 17 publications

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“…The paper, therefore, does not discriminate between glauconitic smectite, glauconitic mica and ferric illite when using the term glauconitization in referring to the mineralization process. Glauconite is common in sedimentary deposits on marine shelves, while ferric illite substitutes for it in terrestrial paleoenvironments ([Odin and Matter, 1981], and [Baker, 1997]) or under hypersaline conditions (Kossovskaya and Drits, 1970).…”

mentioning

confidence: 99%

Mg-rich ferric illite in marine transgressive and highstand systems tracts: Examples from the Paleoproterozoic Semri Group, central India

Banerjee

Jeevankumar

Eriksson

2008

Precambrian Research

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This paper focusses upon two glauconitic sandstones in the Paleoproterozoic Deoland Formation and Chorhat Sandstone, both belonging to the Semri Group, central India. In both the cases glauconitic minerals occur in sandstones deposited in the marine realm, within a transgressive systems tract (TST) for the former unit and within a highstand systems tract (HST) for the latter. The proportion of glauconitic minerals increases in the paleo-offshore direction. Petrography reveals selective early glauconitization of detrital K-feldspars along their fringes, cleavages and the fractures created by volume expansion during progressive alteration, leading to the generation of peloids with small relics of the precursors. XRD and mineral chemistry reveal a structure typical of glauconite, and more akin to Mg-rich ferric illite. The mineral chemistry of the glauconitic mineral phases remains the same whether the glauconitization process was incipient or at an advanced stage.These findings contrast with the previously held belief that ferric illite is confined to terrestrial or marginal marine sediments, and concurs with recent observations that the mineral can form in the open sea, but with high Mg. Since there are no ferro-magnesian minerals in association with these Vindhyan glauconitic sandstones, the seawater appears

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mentioning

confidence: 99%

Mg-rich ferric illite in marine transgressive and highstand systems tracts: Examples from the Paleoproterozoic Semri Group, central India

Banerjee

Jeevankumar

Eriksson

2008

Precambrian Research

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“…Others have proposed that the high aluminium content is of diagenetic origin (Dasgupta et al 1990, Guimarães et al 2000, Ireland et al 1983). Some iron-rich illite has a similar composition, but its formation is related to hypersaline or fluvial environments (Dasgupta et al 1990, Gabis 1963, Hay et al 1991, Jung 1954, Kossovskaya & Drits 1970, Parry & Reeves 1966, Porrenga 1968). This is not the case for the Anse Maranda Formation (Longuépée & Cousineau 2005).…”

Section: Aluminium-rich Glauconite and Causes Of Potassium Lossmentioning

confidence: 99%

Sédimentation en marge d'un promontoire cambro-ordovicien :

Longuépée¹

2005

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Illbasse énergie telle Helminthopsis vers des formes plus robustes comme Chondrites suggèrent une baisse du niveau marin. La bioturbation a également influencé la diagenèse, les grès bioturbés contenant beaucoup moins de ciment précoce de carbonates en comparaison avec les grès non-bioturbés.Les formations de Lauzon et de Pointe-de-la-Martinière se retrouvent respectivement au centre et au sommet du Groupe d'île d'Orléans. La base de la Formation de Lauzon est définie par le conglomérat de Ville Guay. Ce conglomérat résulte de l'érosion d'un récif à thrombolites, conséquence probable d'un affaissement de la marge continentale. Par la suite, un cône boueux/sableux s'est déposé sur les gradins de la marge formant deux séquences granodécroissantes. La Formation de Pointe-de-la-Martinière se compose de turbidites boueuses et de sédiments pélagiques vers l'est et de sédiments du bout de la plate-forme à l'ouest. Ces sédiments de plate-forme sont composés de cycles de Logan et d'alternance shales noirs -calcaires. Ces deux lithofaciès résultent du dépôt dans une zone à haute productivité organique et d'une diagenèse précoce reliée à la forte concentration en CO2. Les deux formations reflètent une transgression majeure recoupée de quelques régressions.L'analyse de faciès et Fichnologie des dépôts du Groupe d'île d'Orléans ont permis de confirmer la présence du Promontoire de Montmorency lors de la période allant du passage du rift à la marge passive (rift-to-drift) de la marge laurentienne. La morphologie de ce promontoire explique la prédominance des turbidites dans un sous-bassin d'eau peu profonde à l'est et des dépôts de plate-forme à l'ouest. La morphologie en touche de piano explique également la distribution des flyschs taconiens et peut être incorporée dans un modèle d'orogenèse de la chaîne appalachienne. Le modèle présenté ici peut également servir de comparaison pour d'autres secteurs des Appalaches. IV ABSTRACTThe understanding of mountain chains is in a large part a study of the morphology and nature of the colliding elements. The distribution of Taconian flysch deposits along the Laurentian margin was controlled by the presence of promontories and reentrants related to the Iapetan rift. The uneven distribution of those sediments is known at a regional scale, but is still poorly defined at a local scale, where second order feature can influence sediment dispersion. The Montmorency Promontory is such a second-order feature found in the Québec Reentrant, and was defined on the basis of faciès changes observed in Middle Ordovician platform and flysch deposits. No influence of this headland has been recognized in older deposits, therefore it is difficult to determine if the promontory is related to the Iapetan rift. However, sedimentary sequences in the Quebec City area were interpreted using obsolete models, which would explain the "absence" of the promontory from Late Proterozoic to Early Ordovician.Stratigraphie evidence of the presence of the Montmorency Promontory during the Cambrian and Early Ordovician ...

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“…TIMOFEEV, V.D. SHUTOV Kossovskaya et al, 1963). Its peculiarity is the preservation of a high K2O content in the layer silicate structure.…”

Section: Stage 1-eocene-oligocenementioning

confidence: 99%

The Lithology and Genesis of the Sedimentary Deposits in the Norwegian Basin and Western Part of the Lofoten Basin

Kossovskaya¹

1978

Initial Reports of the Deep Sea Drilling Project

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The Variability of Micaceous Minerals in Sedimentary Rocks

Cited by 46 publications

References 17 publications

Mg-rich ferric illite in marine transgressive and highstand systems tracts: Examples from the Paleoproterozoic Semri Group, central India

Mg-rich ferric illite in marine transgressive and highstand systems tracts: Examples from the Paleoproterozoic Semri Group, central India

Sédimentation en marge d'un promontoire cambro-ordovicien :

The Lithology and Genesis of the Sedimentary Deposits in the Norwegian Basin and Western Part of the Lofoten Basin

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