Julien Mercadier
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View article: Variability of geological interpretations of a mineral deposit: Quantitative study and implications
Variability of geological interpretations of a mineral deposit: Quantitative study and implications Open
View article: Structural network at the basement/cover interface reveals fluid overpressure associated with uranium mineralization in the Eastern Athabasca Basin (Saskatchewan, Canada)
Structural network at the basement/cover interface reveals fluid overpressure associated with uranium mineralization in the Eastern Athabasca Basin (Saskatchewan, Canada) Open
View article: Shear zone memory revealed by in-situ Rb-Sr and 40Ar/39Ar dating of Pyrenean and Alpine tectonic phases in the external Alps
Shear zone memory revealed by in-situ Rb-Sr and 40Ar/39Ar dating of Pyrenean and Alpine tectonic phases in the external Alps Open
International audience
View article: Rare-metal mineralization and crustal magmatism in a collisional orogen: protracted evolution of the Sioule metallogenic zone (Variscan French Massif Central)
Rare-metal mineralization and crustal magmatism in a collisional orogen: protracted evolution of the Sioule metallogenic zone (Variscan French Massif Central) Open
International audience
View article: Stochastic Joint Modeling of Hydrothermal Alteration Halos and Associated Geological Structures Applied to Mining Studies
Stochastic Joint Modeling of Hydrothermal Alteration Halos and Associated Geological Structures Applied to Mining Studies Open
View article: Development of an integrated analytical platform for clay mineral separation, characterization and K–Ar dating
Development of an integrated analytical platform for clay mineral separation, characterization and K–Ar dating Open
Isotopic dating is a valuable method to constrain the timing of lithospheric processes: geodynamic episodes, ore deposition and geothermal regimes. The K–Ar dating technique has the main advantage of being applied to ubiquitous K-bearing m…
View article: Inversion of downhole resistivity properties through infrared spectroscopy and whole‐rock geochemistry using machine‐learning
Inversion of downhole resistivity properties through infrared spectroscopy and whole‐rock geochemistry using machine‐learning Open
The electrical properties of rocks are widely used in the geophysical exploration of natural resources, such as minerals, hydrocarbons and groundwater. In mining exploration, the primary goal is to map electrically anomalous geological fea…
View article: Origin of Helium and Associated Fluid in Fault‐Related Hydrothermal Systems of the Eastern Pyrenees
Origin of Helium and Associated Fluid in Fault‐Related Hydrothermal Systems of the Eastern Pyrenees Open
Intense hydrothermal activity hosted by regional tectonic structures occurs in the Eastern part of the Pyrenees. Helium isotope ratios ( 3 He/ 4 He) in hot springs along the Têt (0.033–0.099 Ra) and the Tech (0.171–0.375 Ra) faults indicat…
View article: Impact of rock heterogeneities at the Basin/Basement interface on the alteration halo geometry of unconformity-related Athabasca uranium deposits
Impact of rock heterogeneities at the Basin/Basement interface on the alteration halo geometry of unconformity-related Athabasca uranium deposits Open
International audience
View article: Unravelling the magmatic and hydrothermal evolution of rare-metal granites through apatite geochemistry and geochronology: The Variscan Beauvoir granite (French Massif Central)
Unravelling the magmatic and hydrothermal evolution of rare-metal granites through apatite geochemistry and geochronology: The Variscan Beauvoir granite (French Massif Central) Open
View article: Development of an integrated analytical platform of clay minerals separation, characterization and <sup>40</sup> K/ <sup>40</sup> Ar dating
Development of an integrated analytical platform of clay minerals separation, characterization and <sup>40</sup> K/ <sup>40</sup> Ar dating Open
Isotopic dating is a valuable method to constrain the timing of lithospheric processes: geodynamic episodes, ore deposition and geothermal regimes. The K-Ar dating technique has the main advantage of being applied to ubiquitous K-bearing m…
View article: Magmatic–hydrothermal stage recorded by mica zonation and Nb–Ta–W–Sn mineralization: New insight into the genesis of highly evolved Songshugang Nb–Ta deposit (Jiangxi, SE China)
Magmatic–hydrothermal stage recorded by mica zonation and Nb–Ta–W–Sn mineralization: New insight into the genesis of highly evolved Songshugang Nb–Ta deposit (Jiangxi, SE China) Open
The role of magmatic and hydrothermal processes in niobium-tantalum mineralization is still controversial and has been limited by a lack of mineralogical records in the evolving magmatic–hydrothermal system. Micas as essential rock-forming…
View article: Ultrapotassic plutons as a source of uranium of vein-type U-deposits (Moldanubian Zone, Bohemian Massif): insights from SIMS uraninite U–Pb dating and trace element geochemistry
Ultrapotassic plutons as a source of uranium of vein-type U-deposits (Moldanubian Zone, Bohemian Massif): insights from SIMS uraninite U–Pb dating and trace element geochemistry Open
The Bohemian Massif hosts significant hydrothermal U-deposits associated with shear zones in the high-grade metamorphic basement. But there is a lack of evidence of a genetic link between mineralization and U-fertile igneous rocks. This co…
View article: Two new cassiterite reference materials for in-situ U-Pb dating from the European Variscan metallogenic belt
Two new cassiterite reference materials for in-situ U-Pb dating from the European Variscan metallogenic belt Open
Cassiterite (SnO2) is one of the dominant ore phases in tin-tungsten bearing magmatic-hydrothermal deposits. It can contain high uranium contents and usually hosts low levels of common Pb, making it one of the best U-Pb geochronometers amo…
View article: Nano to milli scale characteristics of wolframite ([Fe,Mn]WO4) &#160;and their implications for U-Pb geochronology of tungsten-bearing mineral deposits
Nano to milli scale characteristics of wolframite ([Fe,Mn]WO4)  and their implications for U-Pb geochronology of tungsten-bearing mineral deposits Open
Geochronological data on ore-bearing minerals can constrain the absolute ages and duration mineralising processes. Of the tungsten-bearing minerals, wolframite is the most promising geochronometer for these mineral systems, but high precis…
View article: Sulfur isotope and trace element constraints on the conditions of pyrite formation from the Diantou-Shuanglong sandstone-hosted uranium deposit, Ordos Basin, China: Implications for uranium mineralization
Sulfur isotope and trace element constraints on the conditions of pyrite formation from the Diantou-Shuanglong sandstone-hosted uranium deposit, Ordos Basin, China: Implications for uranium mineralization Open
Combined microstructural, isotopic and chemical analysis of pyrite reveals the complexity of its genesis from the Jurassic Zhiluo Formation in the Diantou-Shuanglong sandstone-hosted uranium deposit, southern Ordos Basin. Framboidal, euhed…
View article: Architecture structurale d'un réservoir fossile à l'interface bassin/socle et rôle sur la mise en place de minéralisations d'uranium de haute teneur : exemple du prospect Waterfound, Bassin d'Athabasca (Canada)
Architecture structurale d'un réservoir fossile à l'interface bassin/socle et rôle sur la mise en place de minéralisations d'uranium de haute teneur : exemple du prospect Waterfound, Bassin d'Athabasca (Canada) Open
International audience
View article: Contexte tectonique associé aux minéralisations d’uranium de type discordance : apports des données d’imagerie de paroi dans les unités sédimentaires basales de l'Est du bassin d’Athabasca (Canada)
Contexte tectonique associé aux minéralisations d’uranium de type discordance : apports des données d’imagerie de paroi dans les unités sédimentaires basales de l'Est du bassin d’Athabasca (Canada) Open
International audience
View article: Partial Melting, Hydrothermal Activity and Structural Framework Control Graphite Enrichment and Distribution in Graphitic Shear Zones: Example of the Paleoproterozoic Trans-Hudson Orogeny
Partial Melting, Hydrothermal Activity and Structural Framework Control Graphite Enrichment and Distribution in Graphitic Shear Zones: Example of the Paleoproterozoic Trans-Hudson Orogeny Open
View article: A felsic meta-igneous source for Li-F-rich peraluminous granites: insights from the Variscan Velay dome (French Massif Central) and implications for rare-metal magmatism
A felsic meta-igneous source for Li-F-rich peraluminous granites: insights from the Variscan Velay dome (French Massif Central) and implications for rare-metal magmatism Open
View article: Petrogenesis and tectonic-magmatic context of emplacement of lepidolite and petalite pegmatites from the Fregeneda-Almendra field (Variscan Central Iberian Zone): clues from Nb-Ta-Sn oxide U-Pb geochronology and mineral geochemistry
Petrogenesis and tectonic-magmatic context of emplacement of lepidolite and petalite pegmatites from the Fregeneda-Almendra field (Variscan Central Iberian Zone): clues from Nb-Ta-Sn oxide U-Pb geochronology and mineral geochemistry Open
The Fregeneda-Almendra pegmatite field of the Iberian Massif represents a typical expression of peraluminous rare-metal magmatism that occurred over western Europe at the end of the Variscan orogeny. It is the host for two main types of Li…
View article: Polyphase W-Sn mineralization and rare metal magmatism in relation to the late-Variscan tectono-metamorphic evolution of the southeastern French Massif Central
Polyphase W-Sn mineralization and rare metal magmatism in relation to the late-Variscan tectono-metamorphic evolution of the southeastern French Massif Central Open
View article: Lithological and structural controls on uncorformity uranium deposits of the Athabasca Basin region (Canada)
Lithological and structural controls on uncorformity uranium deposits of the Athabasca Basin region (Canada) Open
International audience
View article: 3-D hydromechanical simulation of intersecting faults: Influences on fluid circulation and formation of oriented-orebodies
3-D hydromechanical simulation of intersecting faults: Influences on fluid circulation and formation of oriented-orebodies Open
View article: Laser Ablation (<scp>U‐Th‐Sm</scp>)/He Dating of Zircons: Analytical Age Bias and its Consequence for Studying Detrital Zircon Populations
Laser Ablation (<span>U‐Th‐Sm</span>)/He Dating of Zircons: Analytical Age Bias and its Consequence for Studying Detrital Zircon Populations Open
The in situ (U‐Th‐Sm)/He and U/Pb laser‐ablation double‐dating procedure is a valuable method that can provide a large dataset relatively efficiently in contrast with conventional bulk helium thermochronometry. In this study, we evaluate t…
View article: Developments of single particle analysis by TOF-ICP-MS for study of nanosize matrix phases in primitive meteorites
Developments of single particle analysis by TOF-ICP-MS for study of nanosize matrix phases in primitive meteorites Open
View article: Tracking the origin of metasomatic and ore-forming fluids in IOCG deposits through apatite geochemistry (Nautanen North deposit, Norrbotten, Sweden)
Tracking the origin of metasomatic and ore-forming fluids in IOCG deposits through apatite geochemistry (Nautanen North deposit, Norrbotten, Sweden) Open
View article: In-situ trace element and Sr isotope signature of apatite: A new key to unravelling the genesis of polymetallic mineralisation in black shales of the Early Cambrian Niutitang Formation, Southern China
In-situ trace element and Sr isotope signature of apatite: A new key to unravelling the genesis of polymetallic mineralisation in black shales of the Early Cambrian Niutitang Formation, Southern China Open
View article: Characterisation of Reference Materials for<i>In Situ</i><scp>Rb‐Sr</scp>Dating by<scp>LA‐ICP‐MS</scp>/<scp>MS</scp>
Characterisation of Reference Materials for<i>In Situ</i><span>Rb‐Sr</span>Dating by<span>LA‐ICP‐MS</span>/<span>MS</span> Open
We present Rb and Sr mass fraction and 87 Sr/ 86 Sr isotope ratio measurement results for four reference materials (RMs) obtained from the Service d'Analyse des Roches et des Minéraux (SARM), Nancy, France: Mica‐Mg, Mica‐Fe, GL‐O and FK‐N.…
View article: Handheld LIBS analysis for in situ quantification of Li and detection of the trace elements (Be, Rb and Cs)
Handheld LIBS analysis for in situ quantification of Li and detection of the trace elements (Be, Rb and Cs) Open