Search Results - "Stummeyer, Jens"

Differences in the behaviour of trace and rare-earth elements in oxidizing and reducing soil environments: Case study of Terra Rossa soils and Cretaceous palaeosols from the Istrian peninsula, Croatia by Durn, Goran, Perković, Ivor, Stummeyer, Jens, Ottner, Franz, Mileusnić, Marta

“…This study compares the differences between the distribution of trace elements and rare-earth elements (REEs) formed under reducing and oxidizing soil…”
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A review of platinum group element (PGE) geochemistry and a study of the changes of PGE contents in the topsoil of Berlin, Germany, between 1992 and 2013 by Birke, Manfred, Rauch, Uwe, Stummeyer, Jens, Lorenz, Hans, Keilert, Beate

“…The data represent the first available data set on platinum group element (PGE) levels in Berlin topsoil. In 2013, over 100 topsoil samples (0–20cm) were…”
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Sphalerite bioleaching comparison in shake flasks and percolators by Schippers, Axel, Tanne, Christoph, Stummeyer, Jens, Graupner, Torsten

“…•High sphalerite bioleaching efficiency with up to 10 g/L zinc in the pregnant leach solution was achieved.•Shake flask and percolator bioleaching experiments…”
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How robust are geochemical patterns? A comparison of low and high sample density geochemical mapping in Germany by Birke, Manfred, Rauch, Uwe, Stummeyer, Jens

“…Regional geochemical mapping projects have been carried out for mineral exploration in Germany since 1954. In the early days, geochemical prospecting methods…”
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Effect of mineralogy on Co and Ni extraction from Brazilian limonitic laterites via bioleaching and chemical leaching by Stanković, Srdjan, Martin, Mirko, Goldmann, Simon, Gäbler, Hans-Eike, Ufer, Kristian, Haubrich, Frank, Moutinho, Vivian Fernandes, Giese, Ellen Cristine, Neumann, Reiner, Stropper, José Luciano, Stummeyer, Jens, Kaufhold, Stephan, Dohrmann, Reiner, Oxley, Anne, Marbler, Herwig, Schippers, Axel

“…•Quantitative mineralogical analysis based on different methods of four laterite samples from the same ore deposit revealed large differences in their…”
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Atacamite and paratacamite from the ultramafic-hosted Logatchev seafloor vent field (14°45′N, Mid-Atlantic Ridge) by Dekov, Vesselin, Boycheva, Tanya, Hålenius, Ulf, Petersen, Sven, Billström, Kjell, Stummeyer, Jens, Kamenov, George, Shanks, Wayne

“…Atacamite and paratacamite are ubiquitous minerals associated with Cu-rich massive sulfides at the Logatchev hydrothermal field (Mid-Atlantic Ridge). In this…”
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Hydrothermal nontronite formation at Eolo Seamount (Aeolian volcanic arc, Tyrrhenian Sea) by Dekov, Vesselin M., Kamenov, George D., Stummeyer, Jens, Thiry, Médard, Savelli, Carlo, Shanks, Wayne C., Fortin, Danielle, Kuzmann, Ernő, Vértes, Attila

“…A sediment core containing a yellowish-green clay bed was recovered from an area of extensive hydrothermal deposition at the SE slope of the Eolo Seamount,…”
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Mineralogical and geochemical evidence for hydrothermal activity at the west wall of 12 degree 50'N core complex (Mid-Atlantic ridge): A new ultramafic-hosted seafloor hydrothermal deposit? by Dekov, Vesselin, Boycheva, Tanya, Halenius, Ulf, Billstrom, Kjell, Kamenov, George D, Shanks, Wayne C, Stummeyer, Jens

“…Dredging along the west wall of the core complex at 12 degree 50'N Mid-Atlantic Ridge sampled a number of black oxyhydroxide crusts and breccias cemented by…”
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Mineralogical and geochemical evidence for hydrothermal activity at the west wall of 12°50′N core complex (Mid-Atlantic ridge): A new ultramafic-hosted seafloor hydrothermal deposit? by Dekov, Vesselin, Boycheva, Tanya, Hålenius, Ulf, Billström, Kjell, Kamenov, George D., Shanks, Wayne C., Stummeyer, Jens

“…Dredging along the west wall of the core complex at 12°50′N Mid-Atlantic Ridge sampled a number of black oxyhydroxide crusts and breccias cemented by black and…”
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Mineralogical and geochemical evidence for recent hydrothermal activity at the west wall of 12°50´N core complex (Mid-Atlantic Ridge): a new ultramafic-hosted seafloor hydrothermal deposit? by Dekov, Vesselin, Boycheva, Tanya, Hålenius, Ulf, Billström, Kjell, Kamenov, George D., Shanks, Wayne C., Stummeyer, Jens

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Metalliferous sediments from Eolo Seamount (Tyrrhenian Sea): Hydrothermal deposition and re-deposition in a zone of oxygen depletion by Dekov, Vesselin M., Kamenov, George D., Savelli, Carlo, Stummeyer, Jens, Thiry, Médard, Shanks, Wayne C., Willingham, Amanda L., Boycheva, Tanya B., Rochette, Pierre, Kuzmann, Ernő, Fortin, Danielle, Vértes, Attila

“…A sediment core taken from the south–east slope of the Eolo Seamount is composed of alternating red-brown and light-brown to bluish-grey layers with signs of…”
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Mobility of metals over the redox boundary in Peru Basin sediments: Environmental Impact Studies for the Mining of Polymetallic Nodules from the Deep Sea by STUMMEYER, Jens, MARCHIG, Vesna

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Anthropogenic Pb component in hydrothermal ochres from Marsili Seamount (Tyrrhenian Sea) by Dekov, Vesselin M., Kamenov, George D., Savelli, Carlo, Stummeyer, Jens

“…Recent hydrothermal Fe-oxyhydroxide precipitates (ochres) were sampled during two submersible expeditions to the NE part of the Marsili Seamount summit (SE…”
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Origin of basal dolomitic claystone in the Marsili Basin, Tyrrhenian Sea by Dekov, Vesselin M., Kamenov, George D., Savelli, Carlo, Stummeyer, Jens, Marchig, Vesna

“…Red–brown dolomitic claystones overlay the Marsili Basin basaltic basement at ODP Site 650. Sequential leaching experiments reveal that most of the elements…”
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Mobility of metals over the redox boundary in Peru Basin sediments by Stummeyer, Jens, Marchig, Vesna

“…Downcore variations and phase distribution of metals in the Quaternary sediments from six areas of the Peru Basin were investigated. The sediments are…”
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Trace-matrix separations for high-purity chromium, molybdenum and tungsten with cellulose collectors by Bl dorn, Wilhelm, Krismer, Robert, Ortner, Hugo M., Stummeyer, Jens, Wilhartitz, Peter, W nsch, Gerold

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