Hydrothermal synthesis of dioctahedral smectites: The Al–Fe3+ chemical series

Andrieux, P.; Petit, Sabine

doi:10.1016/j.clay.2009.11.019

Cited by 55 publications

(60 citation statements)

References 28 publications

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“…This study is based on 26 synthetic smectites samples (Table 1) most of which were previously described in Andrieux and Petit (2010). They are pure smectites, without any other crystalline phases present.…”

Section: Methodsmentioning

confidence: 99%

“…They are pure smectites, without any other crystalline phases present. Andrieux and Petit (2010) underlined the difficulty to synthesize Al-Fe smectites near the Al end-member. In order to have a more continuous evolution of the Fe 3+ /(Fe 3+ + Al) chemical ratio, other smectites were added (samples 47, 52, 53, 54, Table 1).…”

Section: Methodsmentioning

confidence: 99%

“…For natural smectites, the complete octahedral Al-Fe 3+ chemical series has already been described, but in the presence of Mg (Brigatti, 1983;Gaudin et al, 2004). While many papers deal with the synthesis of aluminous smectites (Kloprogge et al (1999) and Lantenois et al (2008) for a review), very few data exists dealing with the synthesis of Al-Fe 3+ -smectites in the absence of Mg (Petit et al, 1995, andPetit, 2010 for a review of Fe and Al-Fe smectites synthesis). The synthesis of Mg free smectites is not straightforward and requires careful adjustment of pH and temperature, which depend specifically on the amount and relative proportions of Al and Fe (Andrieux and Petit, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…While many papers deal with the synthesis of aluminous smectites (Kloprogge et al (1999) and Lantenois et al (2008) for a review), very few data exists dealing with the synthesis of Al-Fe 3+ -smectites in the absence of Mg (Petit et al, 1995, andPetit, 2010 for a review of Fe and Al-Fe smectites synthesis). The synthesis of Mg free smectites is not straightforward and requires careful adjustment of pH and temperature, which depend specifically on the amount and relative proportions of Al and Fe (Andrieux and Petit, 2010). These smectites are particularly interesting as reference materials and may be suitable for providing spectroscopic fingerprints because their permanent charge resides only in the tetrahedral sites due to Al (or Fe 3+ ) for Si substitutions.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Hydrothermal synthesis of dioctahedral smectites: The Al–Fe3+ chemical series. Part II: Crystal-chemistry

Petit

Decarreau

Gates

et al. 2015

Applied Clay Science

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hydrothermal synthesis of dioctahedral smectites: The Al–Fe3+ chemical series. Part II: Crystal-chemistry

Petit

Decarreau

Gates

et al. 2015

Applied Clay Science

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“…The clay mineral product was an iron-rich smectite and is explained by immediate buffering of acidity. In our case, acidity may immediately be neutralised by the strong buffering effect of calcite (Tabelin et al, 2012), which allow iron rich chlorites growth in neutral to basic or alkaline required conditions (Andrieux and Petit, 2010;Turner and Fishman, 1991).…”

Section: Phyllosilicatesmentioning

confidence: 85%

Quantification of mass transfers and mineralogical transformations in a thrust fault (Monte Perdido thrust unit, southern Pyrenees, Spain)

Trincal

Charpentier

Buatier

et al. 2014

Marine and Petroleum Geology

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In fold-and-thrust belts, shortening is mainly accommodated by thrust faults which are preferential zones for recrystallisation and mass transfer. This study focuses on a detachment fault related to the emplacement of the Monte Perdido thrust unit in the southern Pyrenees. The studied fault zone consists of a 10 m thick intensively foliated phyllonite developed within the Millaris marls, of Eocene age. The lithological homogeneity of the hanging wall and footwall allows us to compare the Millaris marls outside the fault zone with the highly deformed marls located in the fault zone and to quantify the chemical, mineralogical and volumetric changes related to deformation processes along the fault.The Millaris marls are composed of detrital quartz, illite, chlorite, minor albite and pyrite, in a micritic calcite matrix. In the fault zone, the cleavage planes are marked by clay minerals and calcite AE chlorite veins attest to fluidemineral interactions during deformation.The mineral proportions in all samples from both the fault zone and Millaris marls have been quantified by two methods: (1) X-ray diffraction and Rietveld refinement, and (2) bulk chemical analyses as well as microprobe analyses to calculate modal composition. The excellent agreement between the results of these two methods allows us to estimate mineralogical variations using a modification of the Gresens' equation. During fault activation, up to 45 wt% of calcite was lost while the amounts of quartz and chlorite remained unchanged. Illite content remained constant to slightly enriched. The mineralogical variations were coupled with a significant volume loss (up to 45%) mostly due to the dissolution of micritic calcite grains. Deformation was accompanied by pressure solution and phyllosilicates recrystallisation. These processes accommodated slip along the fault. They required fluids as catalyst, but they did not necessitate major chemical transfers.

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Thermal alteration: A possible reason for the inconsistency between OMEGA/CRISM and TES detections of phyllosilicates on Mars?

Che

Glotch

2014

Geophysical Research Letters

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Previous laboratory analyses have shown that high temperatures can modify the crystal structures of some phyllosilicates in such a way that their spectroscopic signatures appear different from various wavelength perspectives. This may be the case in the Nili Fossae region of Mars, where our analyses indicate that thermally altered (~400°C) Fe-rich smectites might be possible mineral analogs to the phyllosilicate-bearing units in addition to mineral assemblages formed by Fe/Mg smectite and amorphous weathering products. We suggest that thermal alteration of phyllosilicates induced by impact shock or other heat sources might be a widespread process throughout Martian history. The mixing of altered and unaltered phyllosilicates might be partially responsible for the apparent disconnect between VNIR and TIR observations of Fe/Mg smectite-bearing surfaces on Mars.

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Hydrothermal synthesis of dioctahedral smectites: The Al–Fe3+ chemical series

Cited by 55 publications

References 28 publications

Hydrothermal synthesis of dioctahedral smectites: The Al–Fe3+ chemical series. Part II: Crystal-chemistry

Hydrothermal synthesis of dioctahedral smectites: The Al–Fe3+ chemical series. Part II: Crystal-chemistry

Quantification of mass transfers and mineralogical transformations in a thrust fault (Monte Perdido thrust unit, southern Pyrenees, Spain)

Thermal alteration: A possible reason for the inconsistency between OMEGA/CRISM and TES detections of phyllosilicates on Mars?

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