Pore-lining sudoite in Rotliegend sandstones from the eastern part of the Southern Permian Basin

Biernacka, Julita

doi:10.1180/claymin.2014.049.5.02

Cited by 9 publications

(8 citation statements)

References 49 publications

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“…Although Hillier et al (2006) interpreted kaolinite, tosudite and sudoite from the Devonian Old Red Sandstones as parts of a conversion series, no studies of possible mechanisms of the transition of kaolinite to sudoite under diagenetic conditions were reported. Recent studies have proposed beidellite as an alternative precursor to sudoite in Rotliegend sandstones from the eastern region of the southern Permian Basin (Biernacka, 2014). The absence of any documented occurrences of dioctahedral random mixed-layered chlorite-smectite in association with tosudite, and the presence of mixed chlorite-tosudite mixed layers ( Fig.…”

Section: The Conversion Of Kaolinite To Sudoitementioning

confidence: 95%

“…In shallow-marine environments in tropical regions at temperatures as low as 25°C, the occurrence of berthierine can be preceded by odinite (Porrenga, 1967), which is a poorly crystallized di-trioctahedral Fe 3+ -rich phyllosilicate with a serpentine-like structure (Bailey, 1988b;Odin, 1988). Several studies have documented the occurrence of sudoite in burial diagenesis (Schultz, 1963;Anceau, 1992;Hillier, et al, 2006;Biernacka, 2014); however, the reaction pathway by which sudoite forms in basins remains unknown. Otherwise, simulations of the XRD profiles indicate that sudoite layers are also formed in the reacting mixed-layer illite-smectite, resulting in three-component mixed-layer illite-smectite-sudoite within the shales of the Texas Gulf Coast (Lanson et al, 2009).…”

Section: O C C U R R E N C E S O F Lo W-t E M P E R At U R E C H Lo Rmentioning

confidence: 99%

“…10c,d) and constitute quartz-grain coatings that protect the pore space of sandstones from quartz cementation (Hillier, 1994;Ryan & Hillier, 2002;Billault et al, 2003). Only a few descriptions of tosudite and sudoite have been reported for sandstone reservoirs (Garvie, 1992;Biernacka, 2014;Billon, 2014). The most frequent modes of occurrence of tosudite and sudoite appear to be as grain coatings and pore linings that form typical honeycomb textures (Fig.…”

Section: Textural Characteristicsmentioning

confidence: 99%

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Chlorite and chloritization processes through mixed-layer mineral series in low-temperature geological systems – a review

et al. 2015

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This present study provides an overview of the clay-mineral reactions involved in the chloritization process in a mixed-layer mineral series, and focuses on the properties of the resulting lowtemperature chlorites (formed at <220°C) in diagenetic and hydrothermal systems. According to the literature, most chlorite species occurring in low-temperature geological systems are derived fromspecific clay precursors except for direct precipitates from solution in veins. In addition, three main types of clay-mineral series have been associated with these chloritization processes: saponite-to-chlorite, berthierineto- chlorite and kaolinite-to-sudoite reactions. The conversion of saponite to chlorite results in the most common sequence of trioctahedral clay minerals related to the occurrence of Mg-Fe trioctahedral chlorite in a wide variety of hydrothermal and diagenetic to very low-grade metamorphism environments. Two models were proposed in the literature to describe the saponite-to-chlorite conversion through corrensite. The first model is a continuous transition model based on solid-state transformation (SST) mechanisms and is valid in rock-dominated systems (closed micro-systems with very low fluid-rock ratios). The second model is a stepwise transition model based on dissolution-crystallization mechanisms (DC) and is efficient in fluid-dominated systems (open systems with high fluid-rock ratio). The berthierine to Fechlorite transition results in a sequence of trioctahedral phases which are related to chloritization processes in iron-rich and reducing environments. This transformation is a cell-preserved phase transition dominated by a SST mechanismthat operates simultaneously in different domains of the parental mineral and may be considered as a polymorphic mineral reaction. Finally, the conversion of kaolinite to sudoite (Al-Mg ditrioctahedral chlorite) has not been documented like the other two aforementioned conversion series. Despite the scarcity of detailed investigations, the conversion of kaolinite to sudoite through tosudite is considered a stepwise mineral reaction that is dominated by a DC mechanism. From a compilation of literature data, it appears that several parameters of hydrothermal and diagenetic chlorites differ, including the minimal temperature, the textural and structural characteristics and the extents of compositional fields. In hydrothermal systems, discrete chlorite occurs at a minimal temperature near 200°C, regardless of its chemical composition. In diagenetic systems, discrete chlorite occurs at minimal temperatures that vary according to its crystal chemistry (100–120°C for Mg-chlorite as opposed to 40–120°C for Fe chlorite). The strong discrepancy between the lowest temperature at which Mg- and Fe-chlorite form in buried sediments and in geothermal systems should result from drastically different heating rates, heat-flow conditions and tectonism between basins at passivemargins and geothermal systems at active margins. The morphology, structure and compositional fields of the diagenetic Fe-rich chlorite may have been inherited from those of the berthierine precursor. All of the chlorite species formed through theDC mechanism have good geothermometry potential. However, the SST mechanism in which berthierine is transformed into chlorite could have unexplored consequences regarding the use of the chemistry (including stable isotope composition) of diagenetic Fe-chlorite for reconstructing the burial history of sediments. Further investigations regarding the formationmechanisms of mixed-layerminerals are required to provide us with insight to understand the chloritization process in low-temperature geological systems.

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Section: The Conversion Of Kaolinite To Sudoitementioning

confidence: 95%

Section: O C C U R R E N C E S O F Lo W-t E M P E R At U R E C H Lo Rmentioning

confidence: 99%

Section: Textural Characteristicsmentioning

confidence: 99%

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Chlorite and chloritization processes through mixed-layer mineral series in low-temperature geological systems – a review

et al. 2015

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“…Although this type of Al-and Mg-rich chlorite is far less common than its tri-trioctahedral ite, and nacrite) through a stepwise reaction under the influence of Mg-rich fluids. Sudoite also crystallizes at the expense of diagenetic beidellite when kaolins are lacking [Biernacka, 2014]. These mineral transformations are generally controlled by a dissolution-crystallization mechanism since convincing evidence of kaolinite-sudoite or smectitesudoite mixed-layer minerals (MLMs) are lacking [see review in Beaufort et al, 2015].…”

Section: Introductionmentioning

confidence: 99%

Authigenic kaolinite and sudoite in sandstones from the Paleoproterozoic Franceville sub-basin (Gabon)

Aubineau¹,

Bankole²,

Baron³

et al. 2021

Comptes Rendus. Géoscience

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The mineral paragenetic sequence of the 2.1-billion-year-old (Ga) Francevillian basin is important for understanding the diagenetic fluid history that allowed the preservation of the oldest ecosystem, including bacterial and more advanced forms of life in the FB 2 Member. However, a full characterization of the clay mineralogy of the FB 2 microbial mat-related structures (MRS) and associated host sediments (sandstones and black shales) is yet to be determined. Petrographic, microscopic, and mineralogical analyses reveal the concurrent presence of authigenic vermiform kaolinite and sudoite in the MRS and host sediments. Kaolinite formed along cleavages of altered muscovite and as pore-filling during early diagenesis, while sudoite likely precipitated at the expense of kaolinite that undergone secondary dissolution later in the diagenetic sequence. The formation of sudoite was promoted by fault-controlled acidic and oxidized brines that might have migrated during the Francevillian basin inversion. These results imply that the porosity and permeability of sedimentary rocks dominantly control the mineralogical assemblage of the FB 2 Member.

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“…1). These sam ples were se lected from a larger set of 71 sand stone sam ples which had been pre vi ously stud ied (Biernacka et al, 2006) and whose clay min er als had been ex am ined by XRD (Biernacka, 2014). The abun dance of illite and the di ver sity of lo ca tions were the ba sis for the se lection.…”

Section: Methodsmentioning

confidence: 99%

What can be learned from the K-Ar ages of illite from Rotliegend sandstones of the Fore-Sudetic Monocline, SW Poland?

Biernacka¹

2014

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Biernacka, J., 2015. What can be learned from the K-Ar ages of illite from Rotliegend sand stones of the Fore-Sudetic Monocline, SW Po land? Geo log i cal Quar terly, 59 (2): 257-270, doi: 10.7306/gq.1210The avail able K-Ar ages of authigenic illite from Rotliegend ae olian sand stones of the Fore-Sudetic Monocline, SW Po land, in clud ing those from six sam ples ex am ined in the pres ent study, are crit i cally re viewed in terms of their geo log i cal mean ing and com pared with the K-Ar ages of illite from the re main ing part of the South ern Perm ian Ba sin in Europe. The ma jor ity of ages fall in the range be tween 195 and 150 Ma, i.e. they cor re spond to Ju ras sic times. The re sults may be grouped in sev eral time in ter vals, which are al most iden ti cal to those iden ti fied for Rotliegend sand stones of Cen tral and West ern Eu rope, and which are ten ta tively in ter preted as pulses of in tense illite growth. Short-last ing illitisation is re corded only at places. More often, illitisation pro ceeded as a multi-stage pro cess, which in the north ern part of the Fore-Sudetic Monocline might have lasted un til the Cre ta ceous. The K-Ar ages of authigenic illite gen er ally co in cide with the mod elled time of gas gen er a tion from Car bon if er ous rocks and the fill ing of res er voirs in the area of the Fore-Sudetic Monocline. Pos si bly, the same un der lying pro cesses trig gered illitisation and hy dro car bon ex pul sion, or hy dro car bon mi gra tions trig gered fluid flows and illite crystallisation.

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Pore-lining sudoite in Rotliegend sandstones from the eastern part of the Southern Permian Basin

Cited by 9 publications

References 49 publications

Chlorite and chloritization processes through mixed-layer mineral series in low-temperature geological systems – a review

Chlorite and chloritization processes through mixed-layer mineral series in low-temperature geological systems – a review

Authigenic kaolinite and sudoite in sandstones from the Paleoproterozoic Franceville sub-basin (Gabon)

What can be learned from the K-Ar ages of illite from Rotliegend sandstones of the Fore-Sudetic Monocline, SW Poland?

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