Didier Béziat

Centre National de la Recherche Scientifique

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Stefano Salvi

Centre National de la Recherche Scientifique

Pierre Debat

Géosciences Environnement Toulouse

Luc Siebenaller

Géosciences Environnement Toulouse

Francis Tollon

Université Toulouse III - Paul Sabatier

Lenka Baratoux

Institut de Recherche pour le Développement

Germán Velásquez

University of Concepción

Anne‐Sylvie André‐Mayer

Université de Lorraine

Guillaume Estrade

Université de Toulouse

Martin Lompo

Université Joseph Ki-Zerbo

Mark Jessell

University of Western Australia

Cooperative Institutions

Centre National de la Recherche Scientifique

115

Université Toulouse III - Paul Sabatier

Université de Toulouse

Institut de Recherche pour le Développement

Géosciences Environnement Toulouse

Observatoire Midi-Pyrénées

Université de Lorraine

University of Western Australia

Centre de Recherches Pétrographiques et Géochimiques

Sorbonne Université

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Les spindles chromozincifères du district aurifère de Salsigne (Montagne Noire, France) / Cr-and Zn-bearing spinels in the Salsigne district gold deposit (Montagne Noire, France).

European Journal of Mineralogy (1991)

Didier Béziat Pierre Monchoux

Chromite

Anorthite

10.1127/ejm/3/6/0957

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Citations (9)

Contrôle tectonique de la sédimentation dans le système de bassins d'avant-pays de la Meseta marocaine

Comptes Rendus de l Académie des Sciences - Series IIA - Earth and Planetary Science (2001)

Mohamed Ben Abbou Jean‐Claude Soula Stéphane Brusset Martín Roddaz Ahmed Ntarmouchant

A tectono-sedimentological study of the Upper Visean–Lower Westphalian Fourhal basin (northwestern Moroccan Meseta) has shown that deposition and depocentre migration were controlled by the north-westward propagation of thrust-related folds in the wedge-top depozone of a flexural foreland basin system. These results and a comparison of the ages of regional contraction in the Moroccan Meseta and the French Massif Central favour the interpretation of the Moroccan Meseta as a southern continuation of the south-European Variscan belt. L'étude tectono-sédimentaire du bassin Viséen supérieur–Westphalien inférieur du Fourhal (Nord de la Meseta occidentale marocaine) a montré que la sédimentation et la migration du dépocentre étaient contrôlées par la propagation vers le nord-ouest de plis d'amortissement de chevauchement dans la wedge-top depozone d'un système de bassins d'avant-pays flexural en compression. Ces résultats, ainsi que la comparaison des âges de la contraction régionale dans la Meseta marocaine et le Massif central français, apportent de nouveaux éléments en faveur de l'interprétation selon laquelle la Meseta marocaine était la continuation vers le sud de la chaı̂ne Varisque sud-européenne.

Massif

10.1016/s1251-8050(01)01590-7

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Citations (21)

Tectonic evolution of the Gaoua region, Burkina Faso: Implications for mineralization

Journal of African Earth Sciences (2015)

Lenka Baratoux Václav Metelka Séta Naba Pascal Ouiya Luc Siebenaller

Batholith

Greenschist

Breccia

10.1016/j.jafrearsci.2015.10.004

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Citations (41)

Concentration et fractionnement des terres rares dans les complexes alcalins : le rôle des fluides

Cyrielle Bernard Rapporteur Grégoire Anne‐Sylvie André‐Mayer Didier Béziat Guillaume Estrade

Les terres rares (TR) sont un groupe de metaux utilises dans de nombreuses nouvelles technologies. Leur production est limitee, il est donc important de trouver de nouvelles sources d'approvisionnement. Les TR sont divisees en TR legeres et lourdes, ces-dernieres etant plus rares et ayant plus d'applications. Les granites et pegmatites alcalins sont des roches riches en TR lourdes. Une partie de cet enrichissement est d'origine magmatique, mais le role des fluides hydrothermaux (i.e. eau, CO2, methane surtout) pose question. Ce manuscrit se concentre sur l'etude de mineraux communs (amphiboles, pyroxene, zircon) et des inclusions fluides de six zones du monde pour comprendre l'impact des fluides hydrothermaux par rapport a celui des processus magmatiques dans les granites et pegmatites alcalins. Les resultats montrent que la concentration et le fractionnement des TR sont lies a la circulation de fluides hydrothermaux riches en Na et K ou Ca et Na a des temperatures inferieures a 400 °C.

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Unusual evolution of silica-under- and -oversaturated alkaline rocks in the Cenozoic Ambohimirahavavy Complex (Madagascar): Mineralogical and geochemical evidence

Lithos (2014)

Guillaume Estrade Didier Béziat Stefano Salvi Massimo Tiepolo Jean‐Louis Paquette

Peralkaline rock

Felsic

Fractional crystallization (geology)

Mineral redox buffer

Amphibole

Alkali feldspar

Nepheline

Trachyte

Silicic

Metasomatism

10.1016/j.lithos.2014.08.008

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Citations (42)

Trace element geochemistry by laser ablation ICP-MS of micas associated with Ta mineralization in the Tanco pegmatite, Manitoba, Canada

Contributions to Mineralogy and Petrology (2007)

Marieke Van Lichtervelde Michel Grégoire Robert L. Linnen Didier Béziat Stefano Salvi

Pegmatite

Trace element

Mineral resource classification

Mineral exploration

Laser Ablation

10.1007/s00410-007-0271-z

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Citations (103)

THE USE OF TRACE ELEMENT ANALYSIS OF ENTRAPPED SLAG INCLUSIONS TO ESTABLISH ORE – BAR IRON LINKS: EXAMPLES FROM TWO GALLO‐ROMAN IRON‐MAKING SITES IN FRANCE (LES MARTYS, MONTAGNE NOIRE, AND LES FERRYS, LOIRET)*

Archaeometry (2003)

Marie‐Pierre Coustures Didier Béziat Francis Tollon Claude Domergue Leah E. Long

Knowledge of the iron trade in ancient times rests on determining the source of the objects recovered during archaeological excavations. Unfortunately, attributing the origin is not always possible using archaeological tools alone. Trace element data of the ore and the archaeological material (reduction and reheating slags, entrapped slag inclusions from the bloom, bar iron and iron blades) from two Gallo‐Roman iron‐making centres, Les Martys (Montagne Noire) and Les Ferrys (Loiret), were determined using ICP–AES/MS and LA–ICP–MS. The results highlight a continuity of composition that makes it possible to establish a link between the initial ore and the semi‐finished iron products.

Trace element

Slag (welding)

Iron ore

Bar (unit)

TRACE (psycholinguistics)

10.1046/j.1475-4754.2003.00131.x

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Citations (87)

Cobaltite-gersdorffite solid solution as a primary magmatic phase in spessartite, Lacaune area, Montagne Noire, France

The Canadian Mineralogist (1996)

Didier Béziat Pierre Monchoux Francis Tollon

Cobaltite

Primary (astronomy)

Source

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Citations (15)

Une source probable de l’or alluvionnaire de l’Ariège : la minéralisation filonienne du Plateau de l’Assaladou (Pyrénées, France)

Marguerite Munoz D. Alindawa Frédéric Christophoul Béatrice Caüuet Didier Béziat

Source

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Citations (0)

Formation of Fluid Inclusions during Heat Treatment of Barremo-Bedoulian Flint: Archaeometric Implications

Archaeometry (2016)

Jean Milot Luc Siebenaller Didier Béziat Vanessa Léa Patrick Schmidt

At the end of the fifth millennium bc, the development of a specialized lithic industry in the Chassey societies of south-eastern France and its dissemination as far as Catalonia and Tuscany attest to important socio-economic changes in the Mediterranean Neolithic societies. The lithic production was made on barremo-bedoulian flint that was heat-treated to improve the sharpness of the tools produced. Microscopic observations of archaeological and geological, heated and unheated barremo-bedoulian flint samples allowed us to highlight the heat-induced formation of fluid inclusions. Microthermometry analyses showed that these inclusions contain pure H2O, most probably resulting from the dehydration of length-slow (LS) chalcedony and the closure of narrow pores, according to the model proposed by Schmidt et al. (2012). Our results enable us to estimate the heating temperatures used by Chassey artisans to ≈ 230°C. We also propose the ‘pressure cooker’ model to explain the migration of liquid water in flint nodules heated to 230°C. Then, we discuss the ability of a particular type of flint to be heat-treated, and hence its value for Neolithic society, which depends on: (1) the amount of LS chalcedony that ensures the water release at relatively low temperature; and (2) on the total volume of porosity available to store the dehydration water.

Chalcedony

10.1111/arcm.12256

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Citations (15)