Mixed-Layer Chlorite/Smectites from a Pennsylvanian Evaporite Cycle, Grand County, Utah

Bodine, Marc W.; Madsen, Beth M.

doi:10.1346/cms-icc-1.13

Cited by 15 publications

(7 citation statements)

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“…Hillier, 1993;Robinson & Bevins, 1994; Barrenechea et al, 2000) have shown that the occurrence of corrensite (and Mg-chlorites) is temperature related. This supports the observation of Bodine & Madsen (1987) that there is (still) no evidence for corrensite formation at surface temperatures in sedimentary sequences, and confirms the original proposal of Kübler (1973) that corrensite is an indicator of diagenetic grade.…”

supporting

confidence: 90%

“…The rare fauna encountered in these beds is of brackish-hypersaline en vi ro nm en t s ( Ma rc us & Sl ag er, 1 98 5 ). Accordingly, the suggested palaeogeography is of local shallow evaporative lakes fed by basaltic water enriched with Mg. Trioctahedral smectites may form in both marine and lacustrine evaporitic environments either by direct precipitation (Jones, 1986;Bodine & Madsen, 1987) or by transformation of dioctahedral (detrital) clays (Banfield et al, 1991). Saponite formation is favoured by reducing alkaline conditions in which divalent iron is incorporated into its structure (Güven, 1988).…”

Section: Diagenetic Evolution Of Claysmentioning

confidence: 99%

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Diagenesis of trioctahedral clays in a Miocene to Pleistocene sedimentary–magmatic sequence in the Dead Sea Rift, Israel

et al. 2001

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The diagenetic evolution of clay minerals in a 4249 m sedimentary-magmatic sequence of the Zemah-1 drillhole in the Dead Sea Rift, Israel, was studied, mainly by X-ray diffraction (XRD). The parallel maturation of the organic matter was estimated by the thermal alteration index (TAI) method. Both parameters follow a progressive diagenesis with depth. The original clays, now encountered only at shallow depths, were dioctahedral, and mostly detrital. They transformed into Mg-rich trioctahedral clays starting with a saponite-dominated assemblage, followed by a saponite, ordered chlorite-smectite (C-S), and chlorite assemblage, and finally by a saponite, corrensite, chlorite and talc assemblage. Significant mineralogical composition gaps occur between saponite to corrensite and corrensite to chlorite. Short-range variations within the most evolved assemblage are controlled by bulk-rock composition. Depths of first occurrence and disappearance of minerals indicate a much higher geothermal gradient in the past whereas the TAI values suggest an even higher palaeogradient of ∼708C km–1.

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supporting

confidence: 90%

Section: Diagenetic Evolution Of Claysmentioning

confidence: 99%

Diagenesis of trioctahedral clays in a Miocene to Pleistocene sedimentary–magmatic sequence in the Dead Sea Rift, Israel

et al. 2001

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“…This mineral has been most often described in evaporite pools or limestone (e.g., Grim et al, 1959;Kopp and Fallis, 1974). It has been also identified in lagoons or restricted pools (e.g., April, 1981;Bodine and Madsen, 1987). The possible formation of corrensite by diagenetic or hydrothermal alteration of basalt or andesite and their pyroclastics and lowmetamorphosed equivalents has been described by, e.g., Shirozu et al (1975), Shau et al (1990), Bettison-Varga et al (1991 and Robinson et al (1993).…”

Section: Discussionmentioning

confidence: 94%

Corrensite in Albic Luvisol at Podmokly (Krivoklatsko Protected Landscape Area, Czech Republic)

Žigová¹

2017

Acta Geodynamica Et Geomaterialia

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The study was performed in the territory of the Skryje-Týřovice Basin, in the Buchava Formation. The study area falls within the Křivoklátsko Protected Landscape Area. Samples were collected from Albic Luvisol. Parent material was characterized on the basis of thin section study. Soil development was evaluated by parameters such as macromorphological analysis, particle size distribution, pH, base saturation, cation exchange capacity, soil organic matter and mineral composition of clay fraction. Results of the analyses, especially the thickness of Bt horizon and distribution of clay fraction in the soil profile, confirm the process of intensive pedogenetic clay differentiation. Trioctahedral 1:1 regularly interstratified mineral (R=1) containing chlorite and smectite layers (low-charge corrensite) was described for the first time in the soils of the Czech Republic. Corrensite was detected in the Ah horizon of Albic Luvisol under weakly acid reaction conditions in the increasing amount of organic matter using the X-ray diffraction analysis. The distribution of clay minerals in Albic Luvisol showed that soil development is influenced by loess and also volcanic rocks in the lower part of the profile.

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“…Indeed, the positive correlation with kaolinite in the upper part of the series points to a sedimentary origin (Dunoyer de Segonzac, 1969;Huggett, 1984). On the contrary, chlorite and chlorite-smectite mixedlayer minerals observed in the evaporitic deposits between 1450 to 1480 and 1550 to 1610 m probably result from diagenetic reactions as demonstrated from other localities (Bodine, 1985;Bodine & Madsen, 1985;Hillier, 1993).…”

Section: Mineralogical Changes With Depth: Sedimentary and Diageneticmentioning

confidence: 86%

Reconstruction of palaeothermal conditions in a passive margin using illite-smectite mixed-layer series (BA1 scientific deep drill-hole, Ardeche, France)

Renac

Meunier²

1995

Clay miner.

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AB S TRACT:The comparison between measured and predicted smectite percent (%Sm) in an illite-smectite (l-S) mixed-layer series was used to estimate the thermal conditions of diagenesis in the Ard~che sedimentary series. Measurements were performed using the decomposition procedure (Lanson & Besson, 1992) of XRD patterns obtained from oriented preparations (<0.2 Ixm fractions). Three particle populations were identified: l-S, poorly crystallized illite (PCI), and well crystallized illite (WCI); the %Sm was measured in the I-S population by comparison with calculated XRD patterns using the NEWMOD software (Reynolds, 1985). The theoretical evolution of %Sm with depth obtained with the two first-order kinetic reaction processes described by Velde & Vasseur (1992) was compared to the measured one at Balazuc. The best fit was obtained for the following conditions: 35~ km -1 and between 1500 and 2000 m for the thermal gradient and the eroded piles, respectively. The predicted values for I-S compositions in the 10-0% Sm range are overestimated by the model because the reaction controlling the composition is no longer the dissolution of I-S but the ripening of illitic particles (PCI and WCI).Two zones can be distinguished in the sedimentary series: (1) down to 55 m, the %Sm of I-S particles is highly variable and seems to be controlled by local variations in permeability and chemical composition; (2) down to 550 m, the %Sm of I-S particles is more strictly dependent on the general time-temperature conditions. An anomalously high %Sm value is located in the vicinity of faults at 1669 m due to local change of the water/rock ratio.

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Mixed-Layer Chlorite/Smectites from a Pennsylvanian Evaporite Cycle, Grand County, Utah

Cited by 15 publications

References 0 publications

Diagenesis of trioctahedral clays in a Miocene to Pleistocene sedimentary–magmatic sequence in the Dead Sea Rift, Israel

Diagenesis of trioctahedral clays in a Miocene to Pleistocene sedimentary–magmatic sequence in the Dead Sea Rift, Israel

Corrensite in Albic Luvisol at Podmokly (Krivoklatsko Protected Landscape Area, Czech Republic)

Reconstruction of palaeothermal conditions in a passive margin using illite-smectite mixed-layer series (BA1 scientific deep drill-hole, Ardeche, France)

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