Submicroscopic accessory minerals overprinting clay mineral REE patterns (celadonite–glauconite group examples)

Tóth, Erzsébet; Weiszburg, Tamás G.; Jeffries, Teresa; Williams, C. T.; Bartha, András; Bertalan, Éva; Cora, Ildikó

doi:10.1016/j.chemgeo.2009.10.006

Cited by 18 publications

(21 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, these glauconites are exceptional in the literature because previous (scarce) descriptions of glauconite in hydrothermal environments refer to granular/pelletal glauconites and not to laminated crusts and columns (Buatier et al, 1989(Buatier et al, , 1993D'Antonio and Kristensen, 2005;Ionescu et al, 2006;Geptner et al, 2008;Clauer et al, 2011). In addition, celadonite is a typical hydrothermal alteration product of marine basalts in the field veinlets (Andrews, 1980;Delmont, 1985;Staudigel et al, 1986;Tazaki and Fyfe, 1992;Renac et al, 2010;Tóth et al, 2010). It is likely that some studies reporting glauconite from hydrothermal environments are in fact describing celadonite.…”

Section: Discussionmentioning

confidence: 90%

“…Maturation from nascent glauconite (glauconitic smectite) to highly evolved glauconite is related to a decrease in Al, Si, Mg, Ca and Na and an increase in K and Fe, producing a decreasing- compositionally reach celadonite composition in view of the current nomenclature (Rieder et al, 1998;Tóth et al, 2010). Celadonite is the most evolved stage of glauconitisation according to Tóth et al (2010), although in the geological literature the term glauconite is often applied to green grains at any stage of evolution (e.g. .…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Glauconitic laminated crusts from hydrothermal alteration of Jurassic pillow-lavas (Betic Cordillera, S Spain): a microbial influence case

Reolid

Abad

2014

Journal of Iberian Geology

View full text Add to dashboard Cite

The green crusts infilling the spaces among pillow-lavas from the Lower Jurassic Median Subbetic (Betic Cordillera, S Spain) are the subject of this textural, mineralogical and geochemical study. Their exceptional laminated morphology and mineral composition made it possible to establish the genetic conditions and different phases of the infilling, while also interpreting the possible influence of microbial activity in the origin and growth of the laminated crusts. Two types of crust were discerned: green laminated crusts and black crusts. The green crusts are mostly composed by glauconite and celadonite, and a minority by smectites, whereas black crusts and lens-shaped nappes are saponitic. The record of filaments and coccoid-shaped forms at different scales from the glauconitic crusts indicates the potential implication of chemoorganotrophic microbes in the precipitation of the glauconite, and the development of laminated textures under lowtemperature hydrothermal conditions. During an early stage, alteration of pillow-lava margins caused by hydrothermal reducing fluids resulted in black films of saponite and calcite filling the void spaces. During a cooling phase, green laminated crusts composed by glauconite and celadonite grew under oxic conditions due to both circulation and diffusion of oxygenated sea-water along inter-pillow spaces, and the chemoorganotrophic microbial activity. A new stage of saponite formation with calcite occurred under higher T and confined/reducing conditions resulting from deposition of marine sediments; finally, calcite and quartz crystallised as the latest product closing the remaining space (or producing geodes) among the pillow-lava bodies.Keywords: Celadonite, Glauconite, Saponite, Hydrothermal, Microbes, Lower Jurassic Resumen Las costras verdes localizadas entre las lavas almohadilladas del Subbético Medio (Cordillera Bética, S España) presentan una morfología laminada excepcional. La caracterización textural, geoquímica y mineralógica de estas costras ha permitido establecer las condiciones bajo las que se formaron e interpretar la posible influencia de la actividad microbiana en el origen, crecimiento y morfología de las mismas. Se han diferenciado dos tipos de costras: costras laminadas verdes y costras negras. Las costras verdes están formadas mayoritariamente por glauconita y celadonita y, en menor proporción, por esmectitas. Las costras negras, sin embargo, son de naturaleza saponítica. La presencia de filamentos y formas cocoidales a diferentes escalas de observación en las costras verdes, sugiere la mediación de microbios quimiorganotróficos en la precipitación de la glauconita así como en el desarrollo de texturas laminadas en un ambiente hidrotermal de baja temperatura. En un primer momento, la alteración de las superficies de las lavas almohadilladas, bajo la influencia de fluidos hidrotermales de carácter reductor que siguieron al depósito de las lavas almohadilladas, produjo láminas negras de saponita y calcita. En una fase de enfriamiento posterior, baj...

show abstract

Section: Discussionmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Glauconitic laminated crusts from hydrothermal alteration of Jurassic pillow-lavas (Betic Cordillera, S Spain): a microbial influence case

Reolid

Abad

2014

Journal of Iberian Geology

View full text Add to dashboard Cite

show abstract

“…These data, as well as the lower content of tetrahedral Al in the outer micas, clearly corroborates the existence of two dioctahedral mica populations, being the inner micas glauconites and the outer ones-celadonites ( Figure 19B,C). According to Tóth et al [137], celadonite is the most evolved stage of glauconitization.…”

Section: Mineralogy and Geochemistrymentioning

confidence: 99%

“…Maturation from nascent glauconite (glauconitic smectite) to highly evolved glauconite is associated with a diminution in Al, Si, Mg, Ca, and Na content and an increase in Fe and K, generating a decreasingly expandable smectitic component [190][191][192][193]. In fact, the most mature glauconitic micas compositionally range celadonite composition [111,137,194]. Celadonite is a typical product of hydrothermal alteration processes of marine basalts in the field veinlets [137,[195][196][197][198][199][200] and it is likely that some studies reporting glauconite from hydrothermal contexts are in fact reporting celadonite.…”

Section: Hydrothermal Glauconitic Microbial Crustsmentioning

confidence: 99%

“…In fact, the most mature glauconitic micas compositionally range celadonite composition [111,137,194]. Celadonite is a typical product of hydrothermal alteration processes of marine basalts in the field veinlets [137,[195][196][197][198][199][200] and it is likely that some studies reporting glauconite from hydrothermal contexts are in fact reporting celadonite.…”

Section: Hydrothermal Glauconitic Microbial Crustsmentioning

confidence: 99%

See 1 more Smart Citation

Jurassic Non-Carbonate Microbialites from the Betic-Rifian Cordillera (Tethys Western End): Textures, Mineralogy, and Environmental Reconstruction

Reolid

Abad

2019

Minerals

View full text Add to dashboard Cite

The term microbialite is commonly applied for describing carbonate organo-sedimentary deposits that have accreted as a result of the activity of benthic microbial communities (BMC). However, non-carbonate microbialites are progressively well-known and show a great diversity of organisms, processes, and mineralogical compositions. This article reviews three types of Jurassic microbialites from four different environmental contexts from the Betic-Rifian Cordillera (South Spain and North Morocco): marine hardgrounds, submarine caves, hydrothermal vents, and submarine volcanic deposits. The Middle-Late Jurassic transition in the External Subbetic (Betic Cordillera) and the Jbel Moussa Group (Rifian Calcareous Chain) was characterized by the fragmentation of the carbonate epicontinental platforms that favored these different settings: (A) Many stratigraphic breaks are recorded as hardgrounds with surficial hydrogenetic Fe crusts and macro-oncoids related to chemo-organotrophic behavior of BMC that served as a specific trap for Fe and Mn enrichment; (B) Cryptic hydrogenetic Fe-Mn crusts (or endostromatolites) grew in the walls of submarine cavities and fractures mainly constituted by Frutexites (chemosynthetic and cryptobiontic microorganism) locally associated to serpulids; (C) Hydrothermal Mn crusts are mainly constituted by different types of filaments and bacillus-shaped bacteria, whose mineralogy and geochemistry point to a submarine hydrothermal origin; (D) Finally, glauconite laminated crusts, constituted by branched cylindrical filaments, have grown in cryptic spaces among the pillow-lava bodies, probably related to the metabolism of chemo-organotrophic microbes under oxic conditions at temperatures between 30 and 90 °C. In most of the cases described in this work, microbial organisms forming microbialites were extremophiles.

show abstract

An Assessment of Alternate Fertilizer Potential of Glauconite Deposits in India using Simple Beneficiation Methods

Choudhury

Raju

Shaikh

et al. 2022

Journal of the Geological Society of India

View full text Add to dashboard Cite

This study presents an assessment of alternate fertilizer potential of glauconite deposits in India with precise stratigraphy, dimension of the deposit, and its K2O contents for understanding their alternate potash fertilizer potential. Further, it provides simple beneficiation methods to separate glauconite from the rest of the sediments. Many of the glauconite deposits, particularly those of Precambrian age, are considerably thick and are laterally extensive. Although the content of K2O is low in the bulk rock, it is moderate to high in the glauconites. The glauconite content of the original deposits is low, mostly in the range of 10 to 20 wt%. Inexpensive and simple methods such as sieving and electromagnetic separation enhance the glauconite content up to 57 wt% in selected samples. This study is crucial for planning alternatives of conventional potash fertilizer, which are expected to be exhausted in the near future.

show abstract

Submicroscopic accessory minerals overprinting clay mineral REE patterns (celadonite–glauconite group examples)

Cited by 18 publications

References 28 publications

Glauconitic laminated crusts from hydrothermal alteration of Jurassic pillow-lavas (Betic Cordillera, S Spain): a microbial influence case

Glauconitic laminated crusts from hydrothermal alteration of Jurassic pillow-lavas (Betic Cordillera, S Spain): a microbial influence case

Jurassic Non-Carbonate Microbialites from the Betic-Rifian Cordillera (Tethys Western End): Textures, Mineralogy, and Environmental Reconstruction

An Assessment of Alternate Fertilizer Potential of Glauconite Deposits in India using Simple Beneficiation Methods

Contact Info

Product

Resources

About