Search Results - "Brügger, Joel"

Uranium(VI) hydrolysis up to 250 °C and its geological implications by Kalintsev, Alexander, Migdisov, Artas, Brugger, Joël, Xu, Hongwu

“…The hydrolysis of uranium(VI) has been investigated by solubility experiments conducted on sodium uranate (Na2U2O7) over a pHT range of 4.5–8 at 200 and…”
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Kinetically driven successive sodic and potassic alteration of feldspar by Duan, Gan, Ram, Rahul, Xing, Yanlu, Etschmann, Barbara, Brugger, Joël

“…The dynamic evolutions of fluid-mineral systems driving large-scale geochemical transformations in the Earth’s crust remain poorly understood. We observed…”
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Gold solubility in alkaline and ammonia-rich hydrothermal fluids: Insights from ab initio molecular dynamics simulations by Mei, Yuan, Liu, Weihua, Brugger, Joël, Guan, Qiushi

“…Knowledge of speciation and thermodynamic properties for aqueous gold complexes are important for both the understanding and numerical modelling of the…”
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Different metal coordination in sub- and super-critical fluids: Do molybdenum(IV) chloride complexes contribute to mass transfer in magmatic systems? by Guan, Qiushi, Mei, Yuan, Liu, Weihua, Brugger, Joël

“…Molybdenum (Mo) is extracted predominantly from magmatic-hydrothermal ore deposits, and knowledge of the thermodynamic properties of aqueous Mo complexes over…”
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Contrasting regimes of Cu, Zn and Pb transport in ore-forming hydrothermal fluids by Zhong, Richen, Brugger, Joël, Chen, Yanjing, Li, Wenbo

“…Sulfur and chlorine are the two most important ligands accounting for metal transport in the upper crust. In this study, four metal- and sulfur-saturated model…”
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Textural and compositional complexities resulting from coupled dissolution–reprecipitation reactions in geomaterials by Altree-Williams, Alexander, Pring, Allan, Ngothai, Yung, Brugger, Joël

“…Texture encompasses ‘the overall appearance a rock has because of the size, shape, and arrangement of its constituent mineral grains’. Textural observations…”
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Large S isotope and trace element fractionations in pyrite of uranium roll front systems result from internally-driven biogeochemical cycle by Bonnetti, Christophe, Zhou, Lingli, Riegler, Thomas, Brugger, Joël, Fairclough, Martin

“…•Ore-stage pyrite from roll front deposits across the world have similar signature evolution.•Ore-stage pyrite signatures reflect the dynamic evolution of…”
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Revealing the Effect of Anions on the Formation and Transformation of Zeolite LTA in Caustic solutions: An In Situ Synchrotron PXRD Study by Wang, Sicheng, Vaughan, James, Xia, Fang, Etschmann, Barbara, Brugger, Joël, Brand, Helen, Peng, Hong

“…Zeolite LTA is one of the largest industrial zeolites in both volume and market value. Natural resources or manufacturing wastes such as clay minerals, fly…”
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The aqueous chemistry of polonium (Po) in environmental and anthropogenic processes by Ram, Rahul, Vaughan, James, Etschmann, Barbara, Brugger, Joël

“…•IEAE has given a recommended limit of 1 Bq  g-1 over which radionuclides from the U decay chain need to be regulated.•Many products of mining/oil/coal…”
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A review of the coordination chemistry of hydrothermal systems, or do coordination changes make ore deposits? by Brugger, Joël, Liu, Weihua, Etschmann, Barbara, Mei, Yuan, Sherman, David M., Testemale, Denis

“…The hydration and complexation of metals in hydrothermal fluids are key processes controlling the mobility of elements in the Earth's crust, leading to the…”
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A new mode of mineral replacement reactions involving the synergy between fluid-induced solid-state diffusion and dissolution-reprecipitation: A case study of the replacement of bornite by copper sulfides by Adegoke, Idowu A., Xia, Fang, Deditius, Artur P., Pearce, Mark A., Roberts, Malcolm P., Brugger, Joël

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Trace element catalyses mineral replacement reactions and facilitates ore formation by Xing, Yanlu, Brugger, Joël, Etschmann, Barbara, Tomkins, Andrew G., Frierdich, Andrew J., Fang, Xiya

“…Reaction-induced porosity is a key factor enabling protracted fluid-rock interactions in the Earth’s crust, promoting large-scale mineralogical changes during…”
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The role of fluorine in hydrothermal mobilization and transportation of Fe, U and REE and the formation of IOCG deposits by Xing, Yanlu, Etschmann, Barbara, Liu, Weihua, Mei, Yuan, Shvarov, Yuri, Testemale, Denis, Tomkins, Andrew, Brugger, Joël

“…The fluorine(F)-rich nature in iron oxide-copper-gold (IOCG) deposits has received much attention since it was recognized that the giant Olympic Dam (OD)…”
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Characterisation of a rare earth element- and zirconium-bearing ion-adsorption clay deposit in Madagascar by Ram, Rahul, Becker, Megan, Brugger, Joël, Etschmann, Barbara, Burcher-Jones, Cody, Howard, Daryl, Kooyman, Patricia J., Petersen, Jochen

“…The Ambohimirahavavy igneous complex (Ampasibitika intrusion) in Madagascar hosts a world-class rare-earth element (REE) bearing ion-adsorption clay (IAC)…”
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Fate of gold and base metals during metamorphic devolatilization of a pelite by Zhong, Richen, Brugger, Joël, Tomkins, Andrew G., Chen, Yanjing, Li, Wenbo

“…Scavenging of gold during metamorphic devolatilization is a widely accepted model for fluid and metal sourcing in orogenic gold deposits. In order to further…”
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Yttrium complexation and hydration in chloride-rich hydrothermal fluids: A combined ab initio molecular dynamics and in situ X-ray absorption spectroscopy study by Guan, Qiushi, Mei, Yuan, Etschmann, Barbara, Testemale, Denis, Louvel, Marion, Brugger, Joël

“…Accurate knowledge of rare earth elements (REE) speciation in high pressure – high temperature fluids is required to model REE transport and precipitation in…”
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Formation of Mg-carbonates and Mg-hydroxides via calcite replacement controlled by fluid pressure by Duan, Gan, Brugger, Joël, Etschmann, Barbara, Ram, Rahul, Frierdich, Andrew, Micklethwaite, Steven

“…Reactive fluid flow can control the mineralogical, mechanical and chemical evolution of the Earth’s crust. When rocks are exposed to differential stresses…”
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Zinc complexation in chloride-rich hydrothermal fluids (25–600°C): A thermodynamic model derived from ab initio molecular dynamics by Mei, Yuan, Sherman, David M., Liu, Weihua, Etschmann, Barbara, Testemale, Denis, Brugger, Joël

“…The solubility of zinc minerals in hydrothermal fluids is enhanced by chloride complexation of Zn2+. Thermodynamic models of these complexation reactions are…”
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Yttrium speciation in sulfate-rich hydrothermal ore-forming fluids by Guan, Qiushi, Mei, Yuan, Etschmann, Barbara, Louvel, Marion, Testemale, Denis, Bastrakov, Evgeniy, Brugger, Joël

“…Rare Earth elements (REE) are gaining importance due to their increasing industrial applications and usefulness as petrogenetic indicators. REE-sulfate…”
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Analysis of Gold(I/III)-Complexes by HPLC-ICP-MS Demonstrates Gold(III) Stability in Surface Waters by Ta, Christine, Reith, Frank, Brugger, Joël, Pring, Allan, Lenehan, Claire E

“…Understanding the form in which gold is transported in surface- and groundwaters underpins our understanding of gold dispersion and (bio)­geochemical cycling…”
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