A5035565164- Geological and Geochemical Analysis
- Geochemistry and Geologic Mapping
- earthquake and tectonic studies
- Hydrocarbon exploration and reservoir analysis
- High-pressure geophysics and materials
- Metal Extraction and Bioleaching
- Radioactive element chemistry and processing
- Geochemistry and Elemental Analysis
- Mineral Processing and Grinding
- Geology and Paleoclimatology Research
- Extraction and Separation Processes
- Geological Modeling and Analysis
- Mercury impact and mitigation studies
- Karst Systems and Hydrogeology
- Geological Formations and Processes Exploration
- Mineralogy and Gemology Studies
- Geological and Geophysical Studies Worldwide
- Geological Studies and Exploration
- Clay minerals and soil interactions
- Groundwater and Isotope Geochemistry
- Groundwater flow and contamination studies
Colorado School of Mines
2022-2025
Helmholtz Institute Freiberg for Resource Technology
2021-2024
Helmholtz-Zentrum Dresden-Rossendorf
2021-2024
TU Bergakademie Freiberg
2017-2023
University of Tübingen
2016-2017
Regierungspräsidium Stuttgart
2013
Mesozoic hydrothermal systems host the majority of Europe's fluorspar and barite resources as well significant amounts metals such Ag, Co, Zn, Pb, Ni Cu. Their genetic link to extensional tectonics in conjunction with opening North Atlantic has long been suspected, but their spatial temporal relation tectonic evolution Europe remained enigmatic. A thorough evaluation available geochronological data for fluorite-barite-Pb-Zn, native-metal-arsenide-carbonate MVT-type mineralization Continental...
Abstract Highly saline, deep‐seated basement brines are of major importance for ore‐forming processes, but their genesis is controversial. Based on studies fluid inclusions from hydrothermal veins various ages, we reconstruct the temporal evolution continental fluids Variscan Schwarzwald (Germany). During Carboniferous (vein type i), quartz–tourmaline precipitated low‐salinity (<4.5wt% NaCl + CaCl 2 ), high‐temperature (≤390°C) H O‐NaCl‐( CO ‐ CH 4 ) with Cl/Br mass ratios = 50–146. In...
Abstract The Niederschlag fluorite-barite vein deposit in the Western Erzgebirge, Germany, has been actively mined since 2013. We present results of a first comprehensive study mineralogy, petrography, fluid inclusions, and trace element geochemistry fluorite related to deposit. Two different stages mineralization are recognized. Stage I is older, fine-grained, associated with quartz, forms complex breccia replacement textures. Conversely, younger II accompanied by barite often occurs as...
Abstract Here, we present in situ U–Pb laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) ages of andradite-grossular garnet from four magmatic-hydrothermal polymetallic skarn prospects the Schwarzenberg District, Erzgebirge (Germany), located internal zone Variscan Orogenic Belt. Within geochronological framework igneous rocks and hydrothermal mineralization Erzgebirge, obtained define three distinct episodes formation: (I) early late-collisional (338–331 Ma) recording...
Abstract We present an overview of the geology, lithium resources, and exploration potential greisen-hosted Li mica systems Erzgebirge/Krušné hory metallogenetic province, with emphasis on Zinnwald-Cínovec deposit(s), largest hard-rock resource in Europe (&gt;1.9 million metric tonnes [Mt] Li). In addition to Li, greisen comprise significant resources Sn W for some other critical metals such as Sc, Nb, Ta. Lithium mineralization is related hydrothermal alteration associated late...
Abstract The Freiberg district hosts one of the largest series epithermal polymetallic vein deposits in Europe. availability a systematic collection historical samples provides an excellent opportunity to study anatomy these systems. Detailed petrographic investigations, geochemical analyses, and fluid inclusion studies were conducted on several vertical profiles within decipher mineralogical zoning patterns. Six distinctive mineral associations have been recognized veins;...
Abstract Late-stage pseudomorphous and perimorphous replacement of euhedral baryte and, to a lesser extent, fluorite calcite by quartz is common phenomenon in hydrothermal vein-type deposits. As consequence silicification, the primary mineral assemblage might be substantially altered, therefore this process has severe negative impact on economic potential resources. Although these textures are often reported have significant importance mines producing or chemical grade, that causes...
Abstract The halogens Cl and Br are sensitive indicators for the origin of ore-forming fluids. Here, we use a combination microchemical microscopic methods to show that measurable concentrations these elements commonly occur as atomic-scale substitutions in hydrothermal sphalerite. Furthermore, Cl/Br ratios halogen-rich sphalerites indistinguishable from those corresponding Thus, they record fluid compositions, which turn origin. Given abundance sphalerite base-metal deposits, well relative...
The Sadisdorf Sn-Li-(W-Cu) prospect in the eastern Erzgebirge (Germany) comprises two distinct styles of magmatic-hydrothermal mineralization, namely greisen-type mineralization at Kupfergrube site, and stockwork-type both Zinnklüfte sites. Previously, these sites were regarded as expressions temporally events. In this study, temporal relation was tested by LA-ICP-MS U-Pb data obtained for 16 cassiterite samples, including samples from mineralization. All define a narrow range ages between...
Abstract The Annaberg-Buchholz district is a classic occurrence of hydrothermal five-element (U-Ag-Bi-Co-Ni-As) veins in the Erzgebirge (Germany) with an historic production ~8,700 metric tons (t) Co ore, 496 t U and 26.9 Ag. Multiple mineralization stages are recognized polyphase hosted by Proterozoic paragneiss. Fluorite-barite-Pb-Zn occurs across entire vertical profile district, whereas restricted to upper 400 m below surface, coinciding graphite-rich gneiss lithology. Here, we present...
Abstract This contribution presents new insights into the origin and age relationships of Geyer tin deposit in Erzgebirge, Germany. Tin mineralization occurs skarns, greisen, cassiterite-bearing fluorite-quartz veins. Skarn alteration replaces marble layers Cambrian Jáchymov Group two clearly distinct stages. The first skarn stage forms skarnoid textured assemblages clinopyroxene, garnet, wollastonite with no phases recognized. Garnet U-Pb ages this (~322 Ma) relate earlier to emplacement...
Abstract The Geyer tin skarn in the Erzgebirge, Germany, comprises an early skarnoid stage (stage I, ~ 320 Ma) and a younger metasomatic II, 305 Ma), but yet, source distribution of Sn physicochemical conditions alteration were not constrained. Our results illustrate that contact metamorphic skarnoids I contain only little Sn. REE patterns elevated concentrations HFSE indicate garnet, titanite vesuvianite formed under rock-buffered (low fluid/rock ratios). Prograde assemblages contrast, two...