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Dr. Manuel Keith

Wissenschaftlicher Mitarbeiter am Lehrstuhl für Endogene Geodynamik

Tel: +49 (0)9131 85 26064
Fax: +49 (0)9131 85 29295

Manuel.Keith@fau.de

 

Research Interests

Chalcophile elements are rare in the Earth’s crust and positive anomalies of these elements only occur in geographically restricted areas. Magmatic-hydrothermal systems above subduction zones are such examples and concentrate both metals (e.g., Cu, Ag, Au, Tl) and metalloids (e.g., As, Se, Sb, Te). The wide economic application of these elements in electronics and renewable energies gives them a strategic importance. However, supplying these critical and energy critical elements for the green transition is a growing challenge. Hence, it is important to develop new concepts with respect to chalcophile element sourcing, fractionation and precipitation to ultimately define the magmatic-hydrothermal prerequisites that allow an enrichment of these rare commodities in the Earth’s crust.

Many of these metals and metalloids are hosted in hydrothermal sulphides like pyrite either in solid solution due to lattice substitution or as inclusions on the micro- to nano-scale. Little is known about the incorporation mechanisms for many of these elements, however, this information is vital to achieve high recovery rates, and therefore an efficient and sustainable way of mining and processing.

Grants and funding

Magmatic and hydrothermal prerequisites for porphyry-epithermal mineralisation in continental volcanic arcs, Thrace, NE Greece (PI, DFG DOME priority programme )

Tellurium in natural and synthetic pyrite: Ore-formation and economic implication (PI, DFG individual research grant)

An accessory mineral approach to understanding post-subduction magmatism and mineralisation (Co-PI, NERC UK)

Publications

  • Keith, M., Haase, K. M., Häcker, F., Schwarz-Schampera, U., Anderson, M., Hannington, M., McConachy, T., under review. Effects of fluid boiling on submarine back-arc hydrothermal systems, Nifonea volcano, New Hebrides Arc. Mineralium Deposita.
  • Börner, F., Keith, M., Smith, D. J., Barry, T. L., Neumann, T., under review. Fingerprinting fluid evolution by As and Te in epithermal pyrite, Vatukloula deposit, Fiji. Ore Geology Reviews.
  • Keith, M., Smith, D. J., Doyle, K., Holwell, D. A., Jenkin, G. R. T., Barry, T. L., Becker, J., Rampe, J., 2020. Pyrite chemistry: A new window into Au and Te ore-forming processes in alkaline epithermal districts, Cripple Creek, Colorado: Geochimica et Cosmochimica Acta, 274, 172-191.
  • Martin, A. J., Keith, M., Parvaz, D. B., McDonald, I., Boyce, A. J., McFall, K. A., Jenkin, G. R. T., Strauss, H., MacLeado, C. J., 2020. Effects of magmatic volatile influx in mafic VMS hydrothermal systems: evidence from the Troodos ophiolite, Cyprus: Chemical Geology, 531, 119325.
  • Mavrogonatos, C., Voudouris, P., Berndt, J., Klemme, S., Zaccarini, F., Spry, P. G., Melfos, V., Tarantola, A., Keith, M., Klemd, R., Haase, K., 2019. Trace elements in magnetite from the Pagoni Rachi porphyry prospect, NE Greece: Implications for ore genesis and exploration: Minerals, 9 (12), 1-21.
  • Martin, A. J., Keith, M., McDonald, I., Haase, K. M., McFall, K. A., Klemd, R., MacLeod, C. J., 2019. Trace element systematics and ore-forming processes in mafic VMS deposits: Evidence from the Troodos ophiolite, Cyprus: Ore Geology Reviews, 106, 205-225.
  • Holwell, D. A., Fiorentini, M., McDonald, I., Lu, Y., Giuliani, A., Smith, D. J., Keith, M., Locmelis, M., 2019. A metasomatized lithospheric mantle control on the metallogenic signature of post-subduction magmatism: Nature Communications, 10, 1-10.
  • Keith, M., Haase, K. M., Klemd, R., Smith, D. J., Schwarz-Schampera, U., Bach, W., 2018. Constraints on the source of Cu in a submarine magmatic-hydrothermal system, Brothers volcano, Kermadec island arc: Contributions to Mineralogy and Petrology, 173: 40, 1-16.
  • Keith, M., Smith, D. J., Jenkin, G. R. T., Holwell, D. A., Dye, M. D., 2018. A review of Te and Se systematics in hydrothermal pyrite from precious metal deposits: insights into ore-forming processes: Ore Geology Reviews, 96, 269-282.
  • Smith, D. J., Naden, J., Jenkin, G. R. T., Keith M., 2017. Hydrothermal alteration and fluid pH in alkaline-hosted epithermal systems : Ore Geology  Reviews, 89, 772-779.
  • Keith, M., Haase, K. M., Klemd, R., Schwarz-Schampera, U., Franke, H., 2017. Systematic variations in magmatic sulphide chemistry from mid-ocean ridges, back-arc basins and island arcs: Chemical Geology, 451, 67-77.
  • Keith, M., Haase, K. M., Klemd, R., Krumm, S., Strauss, H., 2016. Systematic variations of trace element and sulfur isotope compositions in pyrite with stratigraphic depth in the Skouriotissa volcanic-hosted massive sulfide deposit, Troodos ophiolite, Cyprus: Chemical Geology, 423, 7-18.
  • Keith, M., Häckel, F., Haase, K. M., Schwarz-Schampera, U., Klemd, R., 2016. Trace element systematics of pyrite from submarine hydrothermal vents: Ore Geology Reviews, 72, 728-745.
  • Regelous, M., Haase, K. M., Freund, S., Keith M., Weinzierl, C. G., Beier, C., Brandl, P. A., Endres, T., Schmidt, H., 2014. Formation of the Troodos Ophiolite at a triple junction: Evidence from trace elements in volcanic glass: Chemical Geology, 386, 66-79.
  • Keith, M., Haase, K. M., Schwarz-Schampera, U., Klemd, R., Petersen, S., Bach, W., 2014. Effects of temperature, sulfur, and oxygen fugacity on the composition of sphalerite from submarine hydrothermal vents: Geology, 42, 699-702.
  • Freund, S., Haase, K. M., Keith, M., Beier, C., Garbe-Schönberg, D., 2014. Constraints on the formation of geochemically variable plagiogranite intrusions in the Troodos Ophiolite, Cyprus: Contributions to Mineralogy and Petrology, 167, 1-22.