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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

My research focuses on the global metal cycle in the Earth’s crust. The chemical composition of magmatic rocks, sulphide ores and their host mineral phases provide important information on metal fractionation processes in magmatic and hydrothermal systems. The combined use of trace elements and stable isotopes (e.g., S and O) offer the opportunity to study metal fractionation processes from their source region, such as the sub-arc mantle, through the crust to the depth of metal deposition. Active submarine magmatic-hydrothermal systems (e.g., Brothers volcano) are interpreted to be analogues of ancient volcanic-hosted massive sulphide deposits (e.g., Troodos) and possibly some subaerial epithermal systems (e.g., Milos). Hence, the comparison of active and fossil magmatic-hydrothermal systems offers the unique opportunity to study ore-forming processes through space and time. Besides the academic interest these studies also have a significant political, economic and environmental impact due to an increasing demand of rare metals (e.g., Te). Furthermore, active magmatic-dominated porphyry-epithermal systems are often associated with volcanoes that are characterised by violent explosive eruptions representing a hazard for the local population, such as Kolumbo-Santorini (Greece) and Kawah Ijen (Indonesia).

Publications

  • Keith, M., Haase, K. M., Häcker, F., Schwarz-Schampera, U., Anderson, M., Hannington, M., McConachy, T., in preparation, Effects of fluid boiling on submarine back-arc hydrothermal systems, Nifonea volcano, New Hebrides Arc. Chemical Geology.
  • Keith, M., Smith, D. J., Doyle, K., Holwell, D. A., Jenkin, G. R. T., Barry, T. L., Becker, J., Rampe, J., under revision, Pyrite chemistry: A new window into Au and Te ore-forming processes in alkaline epithermal districts, Cripple Creek, Colorado: Geochimica et Cosmochimica Acta
  • 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., revisions submitted, Effects of magmatic volatile influx in mafic VMS hydrothermal systems: evidence from the Troodos ophiolite, Cyprus: Chemical Geology.
  • Martin, A. J., Keith, M., McDonald, I., Haase, K. M., McFall, K. A., Klemd, R., MacLeod, C. J., 2019a, 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., 2017, 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.