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Showing 1 to 12 of 12 for “"Geochemical modelling"”.
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Electrochemical speciation and quantitative chromatography for modelling of indium bioleaching solutions
… Centre Freiberg, was to use geochemical modelling to improve indium leaching and extraction efficiency. Indium stability constants and chemical conditions of process relevant solutions were required. Electrochemical methods were used to determine the stability constants of …
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Petrogenesis of Late Cenozoic alkalic basalt near the eastern boundary of the Basin-and-Range: Upper Grand Wash Trough, Arizona and Gold Butte, Nevada
Geochemical, isotopic, paleomagnetic, and geochronological studies of Late Miocene to Pliocene alkalic basalt in the upper Grand Wash Trough, Arizona and at Gold Butte, Nevada may place constraints on the petrogenetic history of the basalt and on the geometry of the crustal structures that may have …
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Influence of Water Chemistry Parameters on the Dissolution Rate of the Lead (II) Carbonate Hydrocerussite
… literature for cerussite and hydrocerussite. The geochemical modelling program PHREEQC was used to speciate total dissolved lead equilibrium concentrations under experimental conditions to determine an approximate solubility product for hydrocerussite of ‑15.98 ± 0.36. The kinetic dissolution data …
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Geochemical and petrological investigation into the magmatic system at Soufrière Hills Volcano, Montserrat.
… dynamics. Detailed textural, petrological and geochemical analyses coupled with field observations are used to define a classification scheme for mafic enclave types in erupted andesite from phase V (2009–2010). Type A are closest to a mafic end-member, whereas type B are significantly …
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Petrogenesis and thermal history of the Kunlun Batholith, Northern Tibet
… range from .7074 to .7130, and support the geochemical modelling which suggests that they have been derived from melting midcrustal sources. Only the Devonian Wanbaogou pluton may have resulted from anatexis of upper crustal sediments. A reset biotite age of 120 Ma from a pluton cut by the …
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Basalt Magmatism as a Key to Unlocking Cenozoic Dynamic Topography
… framework. Secondly, a petrological and geochemical study of diachronous V-shaped ridges and troughs that flank the Reykjanes Ridge south of Iceland is carried out. Thirdly, the Paleogene Igneous Province that fringes the North Atlantic Ocean is placed in an Icelandic Plume context. The …
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Non-traditional sources of critical minerals from the Western Canada Sedimentary Basin
… of this work used machine learning to identify geochemical indicators of REE enrichment in sedimentary strata which can be used to predict where elevated abundances may be found and to inform supplementary sampling programs. It was found that REE were most associated with Th, Nb, and P and …
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The synthesis of calcium phosphate from municipal wastewater and its application for the removal of metals from acidic effluents
… of chemical species concentration. The PHREEQC geochemical model also confirm that the species existed as divalent, trivalent and oxyanions in aqueous solutions. Furthermore, metals were predicted to precipitate as metal hydroxides. Specifically, the geochemical model explicitly showed that Al …
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Ruolo del Magmatismo granitoide nella crescita ed evoluzione della crosta continentale: studio petrologico e gecronolico di quarzo-dioriti e tonaliti di una sezione tipo tardo Paleozoica di Crosta continentale (Batolite delle Serre, Italia meridionale).
Le quarzo-dioriti e le tonaliti del Promontorio di Capo Vaticano (Calabria, Italia meridionale) rappresentano la porzione più profonda tardo-Varisica del Batolite delle Serre. Essendo i litotipi più mafici affioranti nell'area, lo studio di queste rocce ha permesso di verificare il potenziale …
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Mineral sequestration of CO2 by reaction with alkaline residues
… CO2 are used for the development of a kinetic geochemical model based on the freely available PHREEQC algorithm. The software offers the access to databases, which containing thermodynamic constants of all common dissolved species in natural and industrial processes. Experimental assays …
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Geochemistry of artificial groundwater recharge into the Kopoasfontein breccia pipe near Calvinia, Karoo
… factor affecting the viability of the scheme. A geochemical investigation of the rocks from Kq,oasfontein and the various water sources has revealed substantial differences in composition, pH and redox status between the brcccia pipe, Karoo groundwater and surface water sys=m. Major rock types in …