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Professor Dr. Jürgen Koepke

Address Gottfried Wilhelm Leibniz Universität Hannover
Institut für Mineralogie
Callinstraße 3
30167 Hannover

Projects

As Applicant
- Current projects
  - Wehrlites in the ICDP OmanDP drill cores: a key to understand the nature of the hydrous magmatism in subduction zone initiation settings (Infrastructure Priority Programmes)
- Completed projects
  - Experimentelle Untersuchung zur Entwicklung und Differenzierung von SiO2-reichen Schmelzen in der ozeanischen Kruste: Die Genese der Plagiogranite (Priority Programmes)
  - Partial melting of gabbros in high-temperature shear zones -melting experiments on gabbros of the ODP legs 176 and 153 (Infrastructure Priority Programmes)
  - Experimental investigation on the phase equilibra of a tholeiitic ferrobasalt: the role of water activity and oxigen fugacity (Priority Programmes)
  - Pre-eruptive conditions of cumulate-forming MORB magmas of the Southwest Indian Ridge: Experimental study on gabbros of the ODP Legs 118 and 176 (Infrastructure Priority Programmes)
  - Ermittlung eines Fingerabdrucks erhärteter zementgebundener Baustoffe durch Spurenelementanalytik (Research Grants)
  - Experimentelle Untersuchungen zur Genese von Wehrliten in der tiefen ozeanischen Kruste am Beispiel des Oman-Ophioliths (Research Grants)
  - The late-stage evolution of oceanic gabbros - Combined experimental and in-situ isotope study on gabbros of the ODP Legs 118/176 drilled at the Southwest Indian Ridge (Infrastructure Priority Programmes)
  - A combined petrological, geochemical and geochronological study of the magmatic rocks surrounding the Logatchev hydrothermal field. (Priority Programmes)
  - Pre-survey: Magmatic evolution of the Tiger gabbroic complex (Northern Victoria Land, Antarctica): insights into the lower crust of a Cambrian immature Island Arc (Infrastructure Priority Programmes)
  - Time scales for vertically moving axial magma chambers at fast-spreading ocean ridges and involved magmatic reactions: Insights from IODP Site 1256 (Infrastructure Priority Programmes)
  - Additional pre-survey for the project "Establishing a reference profile for fast-spreading oceanic crust: Petrology and geochemistry of the Wadi Gideah cross section in the Oman ophiolite" (Infrastructure Priority Programmes)
  - High temperature hydrothermal activity in the deep oceanic crust: Experiments and investigations on natural rocks in the Oman ophiolite (Research Grants)
  - The Gabbro/Dike transition in oceanic crust generated at slow- and ultraslow-spreading ocean ridge systems (Research Grants)
  - The generation of felsic magmas in the oceanic crust: assimilation-fractional crystallization processes versus re-melting of the crust (Research Grants)
  - Establishing a reference profile for fast-spreading oceanic crust: Petrology and geochemistry of the "Wadi Gideah" cross section in the Oman ophiolite (Infrastructure Priority Programmes)
  - Assimilation, contamination and felsic melt generation at the top of the axial melt lens at fast-spreading oceanic crust: Combined geochemical and experimental investigations at the dike/gabbro transition from IODP Site 1256 (East Pacific Rise) (Infrastructure Priority Programmes)
  - Silicate liquid immiscibility and the formation of Fe (±Ti ±P ±F ±REE) ore deposits (Research Grants)
  - A profile of multiple sulfur, oxygen, strontium isotopes and related chalcophile elements through lower slow-spreading crust (IODP Expedition 360, Atlantis Bank, Southwest Indian Ridge) (Infrastructure Priority Programmes)
  - Long in-situ sections in the Wadi Gideah, Oman ophiolite: The key for understanding the mechanism of accretion, magmatic evolution and cooling of lower fast-spread oceanic crust (Infrastructure Priority Programmes)
  - Melt/rock interaction and fractional crystallization in the lower crust at Hess Deep Rift, East Pacific Rise: A combined analytical and experimental study (Infrastructure Priority Programmes)
  - Understanding axial melt lens dynamics and lower crust accretion at fast-spreading mid-ocean ridges: new insights from drill cores obtained by the ICDP Oman Drilling Project (Infrastructure Priority Programmes)
  - Understanding felsic veins in gabbros drilled by IODP at Atlantis Bank (Southwest Indian Ridge): Formation, metamorphism, and their role as multifunctional pathways for fluid and mass transfer (Infrastructure Priority Programmes)
  - Understanding the crust-mantle transition from fast-spreading mid-ocean ridges: experiments and analytical studies using ICDP OmanDP drill core samples (Infrastructure Priority Programmes)
As Participating Person
- Completed projects
  - Präneogene tektonische Entwicklung Kretas (Infrastructure Priority Programmes)
  - Experimentelle Studien zur Kationendiffusion und zur Auflösungskinetik von Kristallen in Si-reichen Silikatschmelzen (Priority Programmes)
  - Korrelationen zwischen Spurenelementdiffusion und Viskositäten von Silikatschmelzen - experimentelle Untersuchungen über alkalireiche Schmelzen (Priority Programmes)
  - Low pressure differentiation of basalts at the Mid-Atlantic Ridge near Ascension - Constraints from experiments at controlled volatile and oxygen fugacities (Priority Programmes)
  - Magma differentiation processes and pre-eruptive conditions of MORBs (7-11°S) near Ascension Island - Constraints from experiments and phase equilibria modeling (Priority Programmes)
  - The down-hole magmatic-metamorphic evolution in basalts and gabbros monitored by Fe-Ti oxides: A complete section of Superfast Spreading Crust at IODP Site 1256D (Infrastructure Priority Programmes)
  - Ozeanische Gabbros und assoziierte hydrothermale Zirkulation bei niedrigen Spreizungsraten (Research Grants)
  - Pre-eruptive conditions of the volcanic rocks from Snake River Plain, Yellowstone Hotspot-Constraints from experiments and phase equilibria modelling (Infrastructure Priority Programmes)
  - Petrogenesis of TTG veins in oceanic gabbro: constraints from partial melting experiments in the presence of NaCl-rich H2O-CO2 fluids (Infrastructure Priority Programmes)
  - Magma Differentiation processes and volatile contents in Shatsky Rise oceanic Plateau basalts: constraints from mineral, glass and melt inclusion compositions combined with experimental and thermodynamic modeling (Infrastructure Priority Programmes)
  - Application of the electron microprobe to quantitative analysis of ferric-ferrous ratio in silicate glasses, new experimental calibration (Research Grants)
As Co-Investigator
- Current projects
  - Izu-Bonin-Mariana boninites - natural laboratory to study mantle melting and the evolution of magma plumbing systems in early stages of subduction (Infrastructure Priority Programmes)
- Completed projects
  - Differentiation of tholeiites - the role of primitive composition and small amounts of H2O (Research Grants)
  - Unravelling disequilibrium in basaltic crystal cargoes: an experimental and petrological study of mixing in primitive Icelandic magmas (Research Grants)
  - Effects of cutting edge residual stresses on the wear behavior of PVD-coated cutting tools (Research Grants)
  - Chronometry in plutonic rocks: cooling rates of ancient oceanic crust (Research Units)

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