Gilles Berger

Centre National de la Recherche Scientifique

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N. Mangold

Laboratoire de Planétologie et Géosciences

A. Cousin

Institut de Recherche en Astrophysique et Planétologie

O. Gasnault

Institut de Recherche en Astrophysique et Planétologie

S. Maurice

Institut de Recherche en Astrophysique et Planétologie

R. C. Wiens

Purdue University West Lafayette

N. Lanza

Los Alamos National Laboratory

O. Forni

Institut de Recherche en Astrophysique et Planétologie

C. Fabre

Université de Lorraine

Stéphane Le Mouëlic

Laboratoire de Planétologie et Géosciences

A. Ollila

Los Alamos National Laboratory

Cooperative Institutions

Centre National de la Recherche Scientifique

193

Jet Propulsion Laboratory

151

California Institute of Technology

129

Goddard Space Flight Center

108

Planetary Science Institute

102

Ames Research Center

Université Toulouse III - Paul Sabatier

Université de Toulouse

Johnson Space Center

Institut de Recherche en Astrophysique et Planétologie

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Sulphide mineral reactions in clay-rich rock induced by high hydrogen pressure. Application to disturbed or natural settings up to 250 °C and 30 bar

Chemical Geology (2013)

Laurent Truche Marie‐Camille Caumon Cathérine Lerouge Gilles Berger R. Mosser-Ruck

Bar (unit)

Partial pressure

10.1016/j.chemgeo.2013.05.025

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Citations (124)

Surface chemistry of kaolinite and Na-montmorillonite in aqueous electrolyte solutions at 25 and 60°C: Experimental and modeling study

Geochimica et Cosmochimica Acta (2006)

Emmanuel Tertre Sylvie Castet Gilles Berger M. Loubet Éric Giffaut

Silanol

Acidity function

10.1016/j.gca.2006.07.017

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Citations (112)

Expandability- layer stacking relationship during experimental alteration of a Wyoming bentonite in pH 13.5 solutions at 35 and 60°C

Clay Minerals (2001)

F. Rassineux Lise Griffault Alain Meunier Gilles Berger Sabine Petit

Abstract The reaction of a Wyoming-type bentonite with pH 13.5 solutions was investigated experimentally at 35 and 60°C for periods of 1 to 730 days. Some crystal properties of the starting montmorillonitic clay remain unchanged, i.e. stability of the octahedral sheet, total cation exchange capacity (CEC) and CEC after neutralization of the octahedral charge, full expandability in the Casaturated state, and size distribution. Other properties are changed, e.g. there is an increase in the expandability after octahedral charge neutralization; a slight increase in the average layer charge; a decrease of the total surface area; and a particle morphological change from flakes to hexagonal shape. The composition and the structure of the smectite layers did not change significantly during the reaction. The increasing number of expandable layers after octahedral charge neutralization is attributed to modifications in the stacking sequence. The number of interlayers surrounded by two charged tetrahedral sheets increases with reaction time.

Bentonite

Charge density

Surface charge

Cation-exchange capacity

Tetrahedron

10.1180/000985501750177933

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Citations (26)

Kaolinite and smectite dissolution rate in high molar KOH solutions at 35° and 80°C

Applied Geochemistry (1998)

Andreas Bauer Gilles Berger

10.1016/s0883-2927(98)00018-3

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Citations (239)

Mineralogy of a Mudstone at Yellowknife Bay, Gale Crater, Mars

Science (2013)

D. T. Vaniman D. L. Bish D. W. Ming T. F. Bristow R. V. Morris

Sedimentary rocks at Yellowknife Bay (Gale crater) on Mars include mudstone sampled by the Curiosity rover. The samples, John Klein and Cumberland, contain detrital basaltic minerals, calcium sulfates, iron oxide or hydroxides, iron sulfides, amorphous material, and trioctahedral smectites. The John Klein smectite has basal spacing of ~10 angstroms, indicating little interlayer hydration. The Cumberland smectite has basal spacing at both ~13.2 and ~10 angstroms. The larger spacing suggests a partially chloritized interlayer or interlayer magnesium or calcium facilitating H2O retention. Basaltic minerals in the mudstone are similar to those in nearby eolian deposits. However, the mudstone has far less Fe-forsterite, possibly lost with formation of smectite plus magnetite. Late Noachian/Early Hesperian or younger age indicates that clay mineral formation on Mars extended beyond Noachian time.

Noachian

Hesperian

Forsterite

10.1126/science.1243480

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Citations (605)

Compositions of coarse and fine particles in martian soils at gale: A window into the production of soils

Icarus (2014)

A. Cousin P. Y. Meslin R. C. Wiens W. Rapin N. Mangold

Felsic

Regolith

Martian soil

Parent rock

10.1016/j.icarus.2014.04.052

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Citations (74)

Kinetic constraints on illitization reactions and the effects of organic diagenesis in sandstone/shale sequences

Applied Geochemistry (1997)

Gilles Berger Jean‐Claude Lacharpagne Bruce Velde Daniel Beaufort Bruno Lanson

Illite

Muscovite

10.1016/s0883-2927(96)00051-0

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Citations (120)

Abiotic nitrate reduction induced by carbon steel and hydrogen: Implications for environmental processes in waste repositories

Applied Geochemistry (2012)

Laurent Truche Gilles Berger Achim Albrecht Léo Domergue

Carbon fibers

10.1016/j.apgeochem.2012.10.010

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Citations (22)

Authigenic kaolin and illitic minerals during burial diagenesis of sandstones: a review

Clay Minerals (2002)

Bruno Lanson Daniel Beaufort Gilles Berger Andreas Bauer A. Cassagnabère

Abstract The diagenetic evolution of kaolin and illitic minerals in sandstones is described here. The structural characterization of these minerals, the possible reaction pathways leading to their crystallization, and the origin of the fluids involved are discussed specifically. While early precipitation of kaolinite is in general related to flushing by meteoric waters, subsequent diagenetic kaolinite-to-dickite transformation probably results from invasion by acidic fluids of organic origin. Dickite is the stable polytype in most sandstone formations and the kaoliniteto- dickite conversion is kinetically controlled. The conventional model of kaolin illitization, assuming a thermodynamic control in a closed system, is discussed and compared to an alternative model in which illitization of kaolin is not coupled to dissolution of K-feldspar (Berger et al ., 1997). In the latter model, illite crystallization at the expense of kaolin implies that an energy barrier is overcome either by an increased K + /H + activity ratio in solution or by a considerable temperature increase.

Authigenic

Illite

Leucite

Alkali feldspar

10.1180/0009855023710014

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Citations (307)

Origin of cap carbonates: An experimental approach

Palaeogeography Palaeoclimatology Palaeoecology (2013)

Sébastien Fabre Gilles Berger Valérie Chavagnac Philippe Besson

Magnesite

Carbonate minerals

Dolostone

Snowball Earth

10.1016/j.palaeo.2013.10.006

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Citations (24)