Petrologie und Mineralische Rohstoffe

Current project

The HiTech AlkCarb project is funded under the European Union's Horizon 2020 Research and Innovation programme, to develop new geomodels and sustainable exploration methods for alkaline igneous rocks and carbonatites. We are projekt partner and we work in the Kaiserstuhl SW Germany on science question 1 in work package 2: „How can we predict what intrusive rocks are present at depth using volcanic carbonatites and alkaline rocks exposed at the surface?“

Past and present projects

Fluid evolution of continental basement brines by microthermometry and crush leach analyses

Teaching

Fluid Inclusion short course

This 1 SWS short course provides basic knowledge in microthermometrical analyses and data interpretation.

Cathodoluminescence microscopy

Field Trip: Hydrothermal ore forming processes, Schwarzwald

This 3 day field trip provides basic knowledge in mapping ore mineralizations in the field, relationship of host rock and hydrothermal veins and ore forming processes.

Personal information

Dipl. Mineraloge, Postdoc, supervisor of the microthermometry and cathodoluminescence microscopy labs

2006-2012 Diploma in Geoscience, Eberhard Karls University, Tuebingen

2012-2016 Ph.D in Mineralogy, Eberhard Karls University, Tübingen

Ph.D. thesis: Ore forming processes in hydrothermal vein-type deposits, Schwarzwald, Germany

Since 2016 Postdoc, Eberhard Karls University, Tübingen

Project: HighTec AlkCarb - Scientific Question: "How can we predict what intrusive rocks are present at depth using volcanic carbonatites and alkaline rocks exposed at the Surface?"

Publications

Banks, G.J., Walter, B.F., Marks, M.A.W. & Siegfried, P.R. (2019): A Workflow to Define, Map and Name A Carbonatite-or Alkaline Igneous-Associated REE-HFSE Mineral System: A Case Study from SW Germany. Minerals 9(2), 97.

Walter, B.F., Kortenbruck, P., Scharrer, M., Zeitvogel, C. Wälle, M., Mertz-Kraus, R. and Markl, G. (2019): Chemical evolution of ore-forming brines - Basement leaching, metal provenance, and the redox link between barren and ore-bearing hydrothermal veins. A case study from the Schwarzwald mining district in SW-Germany. Chemical Geology 506, 126-148.

Epp,T. , Walter, B.F., Scharrer, M., Lehmann, G., Henze, K., Heimgärtner, C., Bach, W. and Markl, G. (2018): Quartz with associated Sb-Pb-Ag±Au mineralization in the Schwarzwald, SW Germany: a record of metamorphic cooling, tectonic rifting and element remobilization processes in the Variscan belt. Mineralium Deposita. DOI: 10.1007/s00126-018-0855-8 

Braunger, S., Marks, M.A.W., Walter, B.F., Neubauer, R., Reich, R., Wenzel, T., Parsapoor Anis & Markl, G. (2018). The Petrology of the Kaiserstuhl Volcanic Complex, SW Germany: The Importance of Metasomatized and Oxidized Lithospheric Mantle for Carbonatite Generation. Journal of Petrology. Journal of Petrology 59 (9), 1731-1762.

Walter, B.F., Gerdes, A., Kleinhanns, I. C., Dunkl, I., von Eynatten, H., Kreissl, S., & Markl, G. (2018): The connection between hydrothermal fluids, mineralization, tectonics and magmatism in a continental rift setting: fluorite Sm-Nd and hematite and carbonates U-Pb geochronology from the Rhinegraben in SW Germany. Geochimica et Cosmochimica Acta 240, 11-42.

Walter B.F., Parsapoor A., Braunger S., Marks M.A.W., Wenzel T., Martin M., Markl G. (2018): Pyrochlore as a monitor for magmatic and hydrothermal processes in carbonatites from the Kaiserstuhl volcanic complex (SW Germany). Chemical Geology 498, 1-16.

Keim, M. F., Walter, B. F., Neumann, U., Kreissl, S., Bayerl, R. & Markl, G. (2018): Polyphase enrichment and redistribution processes in silver-rich mineral associations of the hydrothermal fluorite-barite-(Ag-Cu) Clara deposit, SW Germany. Mineralium Deposita 53, 1-20.

Kreissl, S., Gerdes, A., Walter, B.F., Neumann, U., Wenzel, T. and Markl, G. (2018): Reconstruction of a >200 Ma multi-stage “five element” Bi-Co-Ni-Fe-As-S system in the Penninic Alps, Switzerland. Ore Geology Reviews.

Walter, B.F., Burisch, M., Fusswinkel, T., Marks, M.A.W., Steele-MacInnis, M., Wälle, M., Apukhtina, O., Markl, G. (2018): Multi-reservoir fluid mixing processes in rift-related hydrothermal veins, Schwarzwald, SW-Germany. Journal of Geochemical Exploration 186, 158-186.

Burisch, M., Walter, B.F., Gerdes, A., Lanz, M. and Markl, G. (2018): Late-stage anhydrite-gypsum-siderite-dolomite-calcite assemblages record the transition from a deep to a shallow hydrothermal system in the Schwarzwald mining district, SW Germany. Geochimica and Cosmochimica Acta 223, 259-278.

Walter, B.F., Steele-MacInnis, M. and Markl, G. (2017): Sulfate brines in fluid inclusions of hydrothermal veins: Compositional determinations in the system H2O-Na-Ca-Cl-SO4. Geochimica et Cosmocimica Acta, 209, 184-203.

Burisch, M., Walter, B.F. and Markl, G. (2017): Silification of hydrothermal gangue minerals in Pb-Zn-Cu-fluorite-quartz-baryte veins. Canadian Mineralogist 55, 1-14.

Walter, B.F., Burisch, M., Marks, M.A.W. & Markl, G. (2017): Major element composition of fluid inclusions from hydrothermal vein-type deposits record eroded sedimentary Units in the Schwarzwald district, SW Germany. Mineralium Deposita 52(8), 1191-1204.

Burisch, M., Gerdes, A., Walter, B.F., Neumann, U., Fettel, M. and Markl, G. (2016): Methane and the origin of five-element veins: Mineralogy, age, fluid inclusion chemistry and ore forming processes in the Odenwald, SW Germany. Ore Geology Reviews. DOI:10.1016/j.oregeorev.2016.10.033

Walter, B.F., Burisch, M., Markl, G. (2016): Long-term chemical Evolution and modification of Continental Basement brines - a field study from the Schwarzwald, SW Germany. Geofluids. DOI: 10.1111/gfl.12167.

Burisch, M., Walter, B.F., Wälle, M. and Markl, G. (2016): Tracing fluid migration pathways in root zone below unconformity-related hydrothermal veins: Insights from trace element systematics of individual fluid inclusions. Chemical Geology 429, 44-50.

Kolchugin, A., Immenhauser, A., Walter, B., Morozov, V.P. (2016): Diagenesis of the palaeo-oil-water transition zone in a Lower Pennsylvanian carbonate reservoir: Constraints from cathodoluminescence microscopy, microthermometry, and isotope geochemistry. Marine and Petroleum Geology 72, 45-61.

Walter, B.F., Immenhauser, A., Geske, A. and Markl, G. (2015): Exploration of hydrothermal Carbonate Magnesium isotop signatures as Tracers for Continental fluid aquifers, Schwarzwald mining district, SW Germany. Chemical Geology 400, 87-105.

Bons, P.; Fusswinkel, T.; Gomez-Rivas, E; Markl, G.; Wagner, T.; Walter, B. (2014): Fluid mixing from below in unconformity-related hydrothermal ore deposits. Geology 42(12), 1035-1038.