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Professor Dr. Harald Behrens

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

Projects

As Applicant
- Current projects
  - Transport and reactions of light elements (Li, B) in pegmatitic systems under thermal disequilibrium - implications for magmatic/hydrothermal ore deposits (Priority Programmes)
- Completed projects
  - Experimentelle Studien zur Kationendiffusion und zur Auflösungskinetik von Kristallen in Si-reichen Silikatschmelzen (Priority Programmes)
  - Strukturelle und kinetische Aspekte des Einbaus von Wasser in silicatische Schmelzen und Gläser (Priority Programmes)
  - Einbau und Dynamik von Wasser in Silikatgläsern und deren Auswirkungen auf die Diffusion von Kationen (Research Grants)
  - Thermomechanisches Verhalten wasserhaltiger Glasschmelzen (Research Grants)
  - Korrelationen zwischen Spurenelementdiffusion und Viskositäten von Silikatschmelzen - experimentelle Untersuchungen über alkalireiche Schmelzen (Priority Programmes)
  - Viscous flow of magmas from Unzen volcano, Japan - implications for magma mixing and ascent (Infrastructure Priority Programmes)
  - Das Redox Verhalten von Chrom im aquatischen Milieu - Eine Cr Isotopenstudie (Research Grants)
  - Porosity and permeability in different alteration types of the oceanic crust as a control of element mobilization - a case study on ODP Leg 169, Middle Valley Juan de Fuca Ridge (Infrastructure Priority Programmes)
  - Differentierungsprozesse in Magmenkammern - Konvektive vs. diffusive Kristallauflösung (Research Grants)
  - Wasserstoff-Diffusion und elektrische Leitfähigkeit in Pyroxen (Research Grants)
  - Diffusion, Speziation und Löslichkeit von Schwefel in Silicatschmelzen (Research Grants)
  - Partitioning of sulfur and sulfur isotopes between fluids and melts - a key for understanding and monitoring of magmatic degassing (Research Grants)
  - Viscous flow and diffusion in highly depolymerized water-rich melts: improvement of experimental methods and implication for natural system (Research Grants)
  - Carbonation of porous rocks by interaction with magmatic and hydrothermal fluids - a case study on Unzen volcano, Japan (Infrastructure Priority Programmes)
  - Pre-eruptive conditions of the Campanian Ignimbrite eruption: Experimental constraints from phase equilibria and volatile solubility studies and its implication for the Campi Flegrei drilling project (Infrastructure Priority Programmes)
  - Effect of pressure on transport properties of granular lithium ion conductors (Research Units)
  - Kinetics of Li intercalation and de-intercalation in tantalum chalcogenide single crystals (Research Units)
  - In situ determination of sulfur speciation in fluids at high temperature and pressure at controlled redox conditions: implications for magma degassing and formation of magmatic ore deposits (Research Grants)
  - Mechanisms of alteration of basaltic and rhyolitic glasses considering solution chemistry and passivating properties of palagonite - a case study on ICDP drilling sites Hawaii and Snake River Plain (Infrastructure Priority Programmes)
  - Impact of structure and relaxation on fatigue and micromechanical properties of oxide glasses - the role of volatiles and bonding state (Priority Programmes)
  - Chlorine in amphibole: intracrystalline diffusion and partitioning between amphibole and silicate melt (Research Grants)
  - Effects of cutting edge residual stresses on the wear behavior of PVD-coated cutting tools (Research Grants)
  - Supply of soluble Fe to ocean surface waters - quantitative approaches from ICDP site Hawaii by determining interface driven Fe transfer from subsurface volcanic rocks (Infrastructure Priority Programmes)
  - New insights into the interplay between water diffusion and viscosity in magma fragmentation (Research Grants)
As Participating Person
- Completed projects
  - Experimentelle Untersuchungen über die Wechselwirkungen zwischen C-H-O-S Fluiden und Magmen (Infrastructure Priority Programmes)
  - Diffusiver Transport und innere Verwitterungsreaktionen in mikroporösen Feldspäten (Research Grants)
  - Distribution of H20, CO2, S and Cl between silicate melts, gas phase and minerals on the example of the Unzen volcano: application for degassing processes (Infrastructure Priority Programmes)
  - Thermodynamik modeling of alkali-rich melt properties based on experimental and structural data (Research Grants)
  - Pre-eruptive conditions prior to and after magma mixing at Unzen volcano: constraints from high pressure experimental investigations (Infrastructure Priority Programmes)
  - Experimentelle Kalibration der Fraktionierungsfaktoren von Eisen-Isotopen zwischen silikatischen Schmelzen und Mineralen bei magmatischen Bedingungen (Research Grants)
  - Experimental study on vesiculation and formation of groundmass microlites induced by decompression: Constraints on processes related to magma ascent at Unzen volcano (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)
  - Isotopic Effects, Jump Correlation and Diffusion Paths in Li-containing Oxide Glasses (Research Units)
As Cooperation Partner
- Completed projects
  - Unravelling disequilibrium in basaltic crystal cargoes: an experimental and petrological study of mixing in primitive Icelandic magmas (Research Grants)
  - Carbon dioxide in ultrapotassic silicate melts: mechanisms and rates of magma degassing and their influence on the intensity and style of volcanic eruptions. (Research Grants)
As Co-Investigator
- Completed projects
  - X-ray microscopy as a fast response tool to exploit processing-microstructure-property relationships for advanced material development (Major Instrumentation Initiatives)
  - The effect of network-modifiers (Mg, Ca, Na and K) on ferric/ferrous ratio in silicate melts: experimental study and improvement of existing models. (Research Grants)
  - The ferric/ferrous ratio in silicic melts: experimental investigation and modelling (Research Grants)

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