Christophe Lécuyer | Université Claude Bernard Lyon 1 (original) (raw)

Papers by Christophe Lécuyer

Research paper thumbnail of The Permo-Triassic Low-K Tholeiitic Island-Arc Series of the Blue Mountains (Eastern Oregon) - a Likely Counterpart of the Eastern Klamath Penecontemporaneous Island-Arc (N California)

Comptes Rendus de l Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy

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Research paper thumbnail of Une production domestique de haches au Néolithique moyen : les métabasaltes de Champ-Villars (Saône-et-Loire)

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Research paper thumbnail of SUAN, G., MATTIOLI, E., PITTET, B., LÉCUYER, C., SUCHÉRAS-MARX, B., DUARTE, L. V., PHILIPPE, M., REGGIANI, L. & MARTINEAU, F. (2010) - Secular environmental precursors to Early Toarcian (Jurassic) extreme climate changes. Earth and Planetary Science Letters, 290: 448–458

SUAN, G., MATTIOLI, E., PITTET, B., LÉCUYER, C., SUCHÉRAS-MARX, B., DUARTE, L. V., PHILIPPE, M., REGGIANI, L. & MARTINEAU, F. (2010) - Secular environmental precursors to Early Toarcian (Jurassic) extreme climate changes. Earth and Planetary Science Letters, 290: 448–458

Earth and Planetary Science Letters

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Research paper thumbnail of Trophic ecology of groundwater species reveals specialization in a low‐productivity environment

Functional Ecology, 2015

ABSTRACT Identifying feeding strategies at lower bounds of habitat productivity is fundamental to... more ABSTRACT Identifying feeding strategies at lower bounds of habitat productivity is fundamental to understand the relationship between energy availability and trophic specialization. Low productivity is expected to severely constrain trophic specialization because organisms may no longer be able to fulfil their energy requirements by feeding on a reduced set of resources. However, species living in low-productivity habitats often exhibit particular biological traits such as low metabolic rates and high food-finding abilities, which may release constraints on trophic specialization.In the present study, we used carbon

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Research paper thumbnail of Remnants of an Oceanic Domain During Paleozoic Times in the Central Belt, Northern California

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Research paper thumbnail of Simultaneous N, C, S stable isotope analyses using a new purge and trap elemental analyzer and an isotope ratio mass spectrometer

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Research paper thumbnail of The Main Water Reservoirs on Earth and their Chemical Composition

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Research paper thumbnail of Water and Plate Tectonics

Physicochemical and Biological Properties, 2013

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Research paper thumbnail of Egyptian mummies record increasing aridity in the Nile valley from 5500 to 1500yr before present

Earth and Planetary Science Letters, 2013

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Research paper thumbnail of Isotopic and anatomical evidence of an herbivorous diet in the Early Tertiary giant bird Gastornis. Implications for the structure of Paleocene terrestrial ecosystems

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Research paper thumbnail of Stable isotope ecology of Miocene bovids from northern Greece and the ape/monkey turnover in the Balkans

Journal of Human Evolution, 65: 185-198

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Research paper thumbnail of Evolution de la circulation hydrothermale en contexte de faille transformante: la fosse Blanco (dorsale Juan de Fuca)

Comptes Rendus de l'Académie des Sciences-Series IIA-Earth and Planetary Science, Jun 30, 1997

The Blanco trough (Juan de Fuca ridge) exposes a continuous section of the upper part of the ocea... more The Blanco trough (Juan de Fuca ridge) exposes a continuous section of the upper part of the oceanic crust (basalts and sheeted dykes) hydrothermally altered in a transform fault context. Coupled microthermometric measurements on fluid inclusions and stable oxygen isotope compositions of secondary phases from the diabase unit were performed to investigate the evolution of hydrothermal fluids. The existence of a dense fracture network directly linked to the geotectonic transform fault environment has maintained a still hot ...

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Research paper thumbnail of Box-Modeling of ¹⁵n/¹⁴n in Mammals

Oecologia, Mar 1, 2006

The ¹⁵N/¹⁴N signature of animal proteins is now commonly used to understand their physiology and ... more The ¹⁵N/¹⁴N signature of animal proteins is now commonly used to understand their physiology and quantify the flows of nutrient in trophic webs. These studies assume that animals are predictably ¹⁵N-enriched relative to their food, but the isotopic mechanism which accounts for this enrichment remains unknown. We developed a box model of the nitrogen isotope cycle in mammals in order to predict the ¹⁵N/¹⁴N ratios of body reservoirs as a function of time, N intake and body mass. Results of modeling show that a ...

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Research paper thumbnail of Thermal maturation and exhumation of a middle orogenic crust in the Livradois area (French Massif Central)

Bulletin de la Societe Geologique de France, 2011

Upper Carboniferous heating and melting of the middle orogenic crust associated with the emplacem... more Upper Carboniferous heating and melting of the middle orogenic crust associated with the emplacement of syntectonic granitoids are documented in the Upper Gneissic Unit of the Livradois area (central part of the French Massif Central). Crustal melting post-dates peak metamorphism conditions (800-625 C, 10-8 kb) dated at 360±4 Ma (U-Th-Pb on monazite). The PT evolution of the metamorphic series indicates that Barrovian metamorphism was followed by a decompression (from 10±1 kbar to 6±1 kbar) associated ...

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Research paper thumbnail of The shredding activity of gammarids facilitates the processing of organic matter by the subterranean amphipod Niphargus rhenorhodanensis

Freshwater Biology, Mar 1, 2011

Summary 1. The functional feeding group approach has been widely used to describe the community s... more Summary 1. The functional feeding group approach has been widely used to describe the community structure of benthic invertebrates in relation to organic matter resources. Based on this functional framework, positive interactions between feeding groups (especially shredders and collector-gatherers) were postulated in the River Continuum Concept. However, relationships with organic matter have been poorly documented for invertebrates living in the hyporheic zone.

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Research paper thumbnail of The record of temperature, wind velocity and air humidity in the δ< i> D</i> and δ< sup> 18</sup> O of water inclusions in synthetic and Messinian halites

Geochimica et Cosmochimica Acta, Aug 15, 2011

Deuterium and oxygen isotope fractionations between liquid and vapor water were experimentally-de... more Deuterium and oxygen isotope fractionations between liquid and vapor water were experimentally-determined during evaporation of a NaCl solution (35gL− 1) as a function of water temperature and wind velocity. In the case of a null wind velocity, slopes of δD–δ18O trajectories of residual waters hyperbolically decrease with increasing water temperatures in the range 23–47° C. For wind velocities ranging from 0.8 to 2.2 ms− 1, slopes of the δD–δ18O trajectories linearly increase with increasing wind velocity at a given water ...

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Research paper thumbnail of Semi-automatic determination of the carbon and oxygen stable isotope compositions of calcite and dolomite in natural mixtures

Applied Geochemistry, Nov 12, 2011

A semi-automatic, on-line method was developed to determine the δ13C and δ18O values of coexistin... more A semi-automatic, on-line method was developed to determine the δ13C and δ18O values of coexisting calcite and dolomite. An isotopic mass balance is used to calculate the compositions of dolomite after having measured that of calcite and of the “bulk” sample. The limit of validity of this method is established by performing isotopic measurements of artificial mixtures made of precisely weighted and isotopically-characterised dolomite and calcite. The accuracy and repeatability of the calculation of dolomite δ13C and δ18O are ...

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Research paper thumbnail of Carbon-and oxygen-isotope records of palaeoenvironmental and carbonate production changes in shallow-marine carbonates (Kimmeridgian, Swiss Jura)

Geological Magazine, 2011

Carbon-and oxygen-isotope ratios are commonly used to correlate shallow-and deep-marine successio... more Carbon-and oxygen-isotope ratios are commonly used to correlate shallow-and deep-marine successions. Carbon-and oxygen-isotope analyses were performed on bulk-carbonate samples from two Kimmeridgian sections of the Swiss Jura platform in order to correlate them with biostratigraphically well-dated coeval sections in the adjacent basin. On the platform, a general decrease in δ 13 C and δ 18 O values from the base to the top of the studied interval is measured, whereas time-equivalent pelagic–hemipelagic carbonates ...

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Research paper thumbnail of Late Cretaceous Antarctic fish diversity

Geological Society, London, Special Publications, 2006

New material from the Santa Marta Formation (late Coniacian-? early Maastrichtian) of James Ross ... more New material from the Santa Marta Formation (late Coniacian-? early Maastrichtian) of James Ross Island contributes significantly to the current knowledge of Late Cretaceous Antarctic fish diversity. The taxon list for the Santa Marta Formation is extended, and new records of neoselachians and teleosts are reported. The stratigraphic ranges of some previously known taxa are enlarged, and the palaeobiogeography and palaeoecology of Late Cretaceous Antarctic fishes are discussed. Top predators that occupied the higher ...

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Research paper thumbnail of δ< sup> 18</sup> O and REE contents of phosphatic brachiopods: a comparison between modern and lower Paleozoic populations

Geochimica et Cosmochimica Acta, Jul 31, 1998

δ18O values of both carbonate (18.7–25.1‰) and phosphate (15.1–16.7‰) components of the francolit... more δ18O values of both carbonate (18.7–25.1‰) and phosphate (15.1–16.7‰) components of the francolite from the fossil brachiopod shells are interpreted as the result of a partial resetting of pristine isotopic compositions. The similarity of hat-shape REE patterns of some lower Ordovician linguloids with those of extant littoral specimens suggests the preservation of a 500 Myr-old record of REE marine chemistry. In agreement with the known paleogeography, the phosphatic brachiopods have been deposited in a coastal ...

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Research paper thumbnail of The Permo-Triassic Low-K Tholeiitic Island-Arc Series of the Blue Mountains (Eastern Oregon) - a Likely Counterpart of the Eastern Klamath Penecontemporaneous Island-Arc (N California)

Comptes Rendus de l Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy

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Research paper thumbnail of Une production domestique de haches au Néolithique moyen : les métabasaltes de Champ-Villars (Saône-et-Loire)

Bookmarks Related papers MentionsView impact

Research paper thumbnail of SUAN, G., MATTIOLI, E., PITTET, B., LÉCUYER, C., SUCHÉRAS-MARX, B., DUARTE, L. V., PHILIPPE, M., REGGIANI, L. & MARTINEAU, F. (2010) - Secular environmental precursors to Early Toarcian (Jurassic) extreme climate changes. Earth and Planetary Science Letters, 290: 448–458

SUAN, G., MATTIOLI, E., PITTET, B., LÉCUYER, C., SUCHÉRAS-MARX, B., DUARTE, L. V., PHILIPPE, M., REGGIANI, L. & MARTINEAU, F. (2010) - Secular environmental precursors to Early Toarcian (Jurassic) extreme climate changes. Earth and Planetary Science Letters, 290: 448–458

Earth and Planetary Science Letters

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Research paper thumbnail of Trophic ecology of groundwater species reveals specialization in a low‐productivity environment

Functional Ecology, 2015

ABSTRACT Identifying feeding strategies at lower bounds of habitat productivity is fundamental to... more ABSTRACT Identifying feeding strategies at lower bounds of habitat productivity is fundamental to understand the relationship between energy availability and trophic specialization. Low productivity is expected to severely constrain trophic specialization because organisms may no longer be able to fulfil their energy requirements by feeding on a reduced set of resources. However, species living in low-productivity habitats often exhibit particular biological traits such as low metabolic rates and high food-finding abilities, which may release constraints on trophic specialization.In the present study, we used carbon

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Research paper thumbnail of Remnants of an Oceanic Domain During Paleozoic Times in the Central Belt, Northern California

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Simultaneous N, C, S stable isotope analyses using a new purge and trap elemental analyzer and an isotope ratio mass spectrometer

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The Main Water Reservoirs on Earth and their Chemical Composition

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Water and Plate Tectonics

Physicochemical and Biological Properties, 2013

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Research paper thumbnail of Egyptian mummies record increasing aridity in the Nile valley from 5500 to 1500yr before present

Earth and Planetary Science Letters, 2013

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Research paper thumbnail of Isotopic and anatomical evidence of an herbivorous diet in the Early Tertiary giant bird Gastornis. Implications for the structure of Paleocene terrestrial ecosystems

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Stable isotope ecology of Miocene bovids from northern Greece and the ape/monkey turnover in the Balkans

Journal of Human Evolution, 65: 185-198

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Evolution de la circulation hydrothermale en contexte de faille transformante: la fosse Blanco (dorsale Juan de Fuca)

Comptes Rendus de l'Académie des Sciences-Series IIA-Earth and Planetary Science, Jun 30, 1997

The Blanco trough (Juan de Fuca ridge) exposes a continuous section of the upper part of the ocea... more The Blanco trough (Juan de Fuca ridge) exposes a continuous section of the upper part of the oceanic crust (basalts and sheeted dykes) hydrothermally altered in a transform fault context. Coupled microthermometric measurements on fluid inclusions and stable oxygen isotope compositions of secondary phases from the diabase unit were performed to investigate the evolution of hydrothermal fluids. The existence of a dense fracture network directly linked to the geotectonic transform fault environment has maintained a still hot ...

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Research paper thumbnail of Box-Modeling of ¹⁵n/¹⁴n in Mammals

Oecologia, Mar 1, 2006

The ¹⁵N/¹⁴N signature of animal proteins is now commonly used to understand their physiology and ... more The ¹⁵N/¹⁴N signature of animal proteins is now commonly used to understand their physiology and quantify the flows of nutrient in trophic webs. These studies assume that animals are predictably ¹⁵N-enriched relative to their food, but the isotopic mechanism which accounts for this enrichment remains unknown. We developed a box model of the nitrogen isotope cycle in mammals in order to predict the ¹⁵N/¹⁴N ratios of body reservoirs as a function of time, N intake and body mass. Results of modeling show that a ...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Thermal maturation and exhumation of a middle orogenic crust in the Livradois area (French Massif Central)

Bulletin de la Societe Geologique de France, 2011

Upper Carboniferous heating and melting of the middle orogenic crust associated with the emplacem... more Upper Carboniferous heating and melting of the middle orogenic crust associated with the emplacement of syntectonic granitoids are documented in the Upper Gneissic Unit of the Livradois area (central part of the French Massif Central). Crustal melting post-dates peak metamorphism conditions (800-625 C, 10-8 kb) dated at 360±4 Ma (U-Th-Pb on monazite). The PT evolution of the metamorphic series indicates that Barrovian metamorphism was followed by a decompression (from 10±1 kbar to 6±1 kbar) associated ...

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Research paper thumbnail of The shredding activity of gammarids facilitates the processing of organic matter by the subterranean amphipod Niphargus rhenorhodanensis

Freshwater Biology, Mar 1, 2011

Summary 1. The functional feeding group approach has been widely used to describe the community s... more Summary 1. The functional feeding group approach has been widely used to describe the community structure of benthic invertebrates in relation to organic matter resources. Based on this functional framework, positive interactions between feeding groups (especially shredders and collector-gatherers) were postulated in the River Continuum Concept. However, relationships with organic matter have been poorly documented for invertebrates living in the hyporheic zone.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The record of temperature, wind velocity and air humidity in the δ< i> D</i> and δ< sup> 18</sup> O of water inclusions in synthetic and Messinian halites

Geochimica et Cosmochimica Acta, Aug 15, 2011

Deuterium and oxygen isotope fractionations between liquid and vapor water were experimentally-de... more Deuterium and oxygen isotope fractionations between liquid and vapor water were experimentally-determined during evaporation of a NaCl solution (35gL− 1) as a function of water temperature and wind velocity. In the case of a null wind velocity, slopes of δD–δ18O trajectories of residual waters hyperbolically decrease with increasing water temperatures in the range 23–47° C. For wind velocities ranging from 0.8 to 2.2 ms− 1, slopes of the δD–δ18O trajectories linearly increase with increasing wind velocity at a given water ...

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Research paper thumbnail of Semi-automatic determination of the carbon and oxygen stable isotope compositions of calcite and dolomite in natural mixtures

Applied Geochemistry, Nov 12, 2011

A semi-automatic, on-line method was developed to determine the δ13C and δ18O values of coexistin... more A semi-automatic, on-line method was developed to determine the δ13C and δ18O values of coexisting calcite and dolomite. An isotopic mass balance is used to calculate the compositions of dolomite after having measured that of calcite and of the “bulk” sample. The limit of validity of this method is established by performing isotopic measurements of artificial mixtures made of precisely weighted and isotopically-characterised dolomite and calcite. The accuracy and repeatability of the calculation of dolomite δ13C and δ18O are ...

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Research paper thumbnail of Carbon-and oxygen-isotope records of palaeoenvironmental and carbonate production changes in shallow-marine carbonates (Kimmeridgian, Swiss Jura)

Geological Magazine, 2011

Carbon-and oxygen-isotope ratios are commonly used to correlate shallow-and deep-marine successio... more Carbon-and oxygen-isotope ratios are commonly used to correlate shallow-and deep-marine successions. Carbon-and oxygen-isotope analyses were performed on bulk-carbonate samples from two Kimmeridgian sections of the Swiss Jura platform in order to correlate them with biostratigraphically well-dated coeval sections in the adjacent basin. On the platform, a general decrease in δ 13 C and δ 18 O values from the base to the top of the studied interval is measured, whereas time-equivalent pelagic–hemipelagic carbonates ...

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Research paper thumbnail of Late Cretaceous Antarctic fish diversity

Geological Society, London, Special Publications, 2006

New material from the Santa Marta Formation (late Coniacian-? early Maastrichtian) of James Ross ... more New material from the Santa Marta Formation (late Coniacian-? early Maastrichtian) of James Ross Island contributes significantly to the current knowledge of Late Cretaceous Antarctic fish diversity. The taxon list for the Santa Marta Formation is extended, and new records of neoselachians and teleosts are reported. The stratigraphic ranges of some previously known taxa are enlarged, and the palaeobiogeography and palaeoecology of Late Cretaceous Antarctic fishes are discussed. Top predators that occupied the higher ...

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Research paper thumbnail of δ< sup> 18</sup> O and REE contents of phosphatic brachiopods: a comparison between modern and lower Paleozoic populations

Geochimica et Cosmochimica Acta, Jul 31, 1998

δ18O values of both carbonate (18.7–25.1‰) and phosphate (15.1–16.7‰) components of the francolit... more δ18O values of both carbonate (18.7–25.1‰) and phosphate (15.1–16.7‰) components of the francolite from the fossil brachiopod shells are interpreted as the result of a partial resetting of pristine isotopic compositions. The similarity of hat-shape REE patterns of some lower Ordovician linguloids with those of extant littoral specimens suggests the preservation of a 500 Myr-old record of REE marine chemistry. In agreement with the known paleogeography, the phosphatic brachiopods have been deposited in a coastal ...

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