A5086423899- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- earthquake and tectonic studies
- Cryospheric studies and observations
- Rock Mechanics and Modeling
- Microstructure and mechanical properties
- Hydrocarbon exploration and reservoir analysis
- Geotechnical and Geomechanical Engineering
- Seismic Imaging and Inversion Techniques
- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- Climate change and permafrost
- Hydraulic Fracturing and Reservoir Analysis
- Winter Sports Injuries and Performance
- Arctic and Antarctic ice dynamics
- Drilling and Well Engineering
- Earthquake Detection and Analysis
- Microstructure and Mechanical Properties of Steels
- Scientific Computing and Data Management
- Geochemistry and Geologic Mapping
- X-ray Diffraction in Crystallography
- Landslides and related hazards
- Zeolite Catalysis and Synthesis
- Ion-surface interactions and analysis
- CO2 Sequestration and Geologic Interactions
Utrecht University
2015-2024
Johannes Gutenberg University Mainz
2005
Universidade Federal do Rio de Janeiro
2005
Büro Vatter (Switzerland)
2005
Australian National University
1989-1993
Environmental Earth Sciences
1993
BP (United Kingdom)
1988-1990
Rijksmuseum
1988
Imperial College London
1985-1986
New microstructural data on experimentally deformed “wet” and “dry” natural olivine rocks (Anita Bay Åheim dunite), together with the other reliable experimental data, indicate that stress‐recrystallized grain size relationship in olivine‐rocks is largely independent of water content temperature, only slightly dependent flow properties material. The cover a stress range 30–300 MPa, contents from <30 ppm to 300 ppm, temperatures 1100–1650°C. Local melt up 10 volume% cannot be demonstrated...
We report here for the first time occurrence of relics majoritic garnet within orogenic peridotites from Otrøy, Western Gneiss Region, Norway. The microstructural evidence consists two‐pyroxene exsolution garnet. Majoritic garnets are only stable at depths greater than 150 km. Estimates initial composition imply pressures 6–6.5 GPa indicating that Otrøy were derived > 185 Mineral‐chemical data indicate present mineral compositions equilibrated mantle conditions around 805 ± 40 °C and 3.2...
Research Article| November 01, 2002 Microdiamonds in a megacrystic garnet websterite pod from Bardane on the island of Fjørtoft, western Norway: Evidence for diamond formation mantle rocks during deep continental subduction Herman L.M. van Roermund; Roermund 1Faculty Earth Sciences, Utrecht University, P.O. Box 80.021, 3508 TA, Utrecht, Netherlands Search other works by this author on: GSW Google Scholar D. Anthony Carswell; Carswell 2Department Geography, University Sheffield, Dainton...
Properties of partially molten rocks depend strongly on the grain‐scale melt distribution. Experimental samples show a variety microstructures, such as lenses, layers, and multigrain pools, which are not readily explained using theory for distribution based isotropic interface energies. These microstructures affect porosity‐permeability relation. It is still unclear how changes with increasing fraction. In this study, electrical conductivity measurements microstructural investigation...
The Erro–Tobbio (ET) peridotite (Voltri Massif, NW Italy) represents a fragment of subcontinental mantle, emplaced at high crustal levels during rifting and opening the Piemonte–Ligurian ocean, Alps–Apennine part Mesozoic Tethys. ET is dominated by spinel-bearing lherzolites, with minor dunites, spinel websterites plagioclase-bearing lherzolites. Granular lherzolites in are transected five generations shear zone structures: porphyroclastic tectonites, plagioclase-, hornblende-...
Summary Tomography in a focused ion beam (FIB) scanning electron microscope (SEM) is powerful method for the characterization of three‐dimensional micro‐ and nanostructures. Although this technique can be routinely applied to conducting materials, FIB–SEM tomography many insulators, including biological, geological ceramic samples, often more difficult because charging effects that disturb serial sectioning using or imaging beam. Here, we show automatic biological samples achieved by with...
Abstract A combination of atomic force microscopy (AFM), high‐resolution scanning electron (HR‐SEM), focused‐ion‐beam (FIB‐SEM), X‐ray photoelectron spectroscopy (XPS), confocal fluorescence (CFM), and UV/Vis synchrotron‐based IR microspectroscopy was used to investigate the dealumination processes zeolite ZSM‐5 at individual crystal level. It shown that steaming has a significant impact on porosity, acidity, reactivity materials. The catalytic performance, tested by styrene oligomerization...
Summary The Weighted Burgers Vector (WBV) is defined here as the sum, over all types of dislocations, [(density intersections dislocation lines with a map) × (Burgers vector)]. Here we show that it can be calculated, for any crystal system, solely from orientation gradients in map view, unlike full density tensor, which requires third dimension. No assumption made about dimension and they may non‐zero. only involved elastic strains are small so lattice distortion entirely due to...
Models for glacial isostatic adjustment (GIA) can provide constraints on rheology of the mantle if past ice thickness variations are assumed to be known. The Pleistocene loading histories that used obtain such based an a priori 1-D viscosity profile assumes single deformation mechanism rocks. Such simplified makes it hard compare inferred inferences from seismology and laboratory experiments. It is unknown what GIA observations more realistic with history not profile. This paper investigates...
Abstract Field studies and seismic data show that semi‐brittle flow of fault rocks probably is the dominant deformation mechanism at base seismogenic zone so‐called frictional‐viscous transition. To understand physical chemical processes accommodating flow, we have performed an experimental study on synthetic granitoid exploring a broad parameter space (temperature, T = 300, 400, 500, 600°C, confining pressure, P c ≈ 1000, 1500 MPa, shear strain rate, 10 −3 , −4 −5 −6 s −1 to finite strains,...
Harzburgites and plagioclase‐peridotites from the Othris Peridotite Massif in Central Greece preserve microstructural petrological evidence for interaction with a melt which became saturated orthopyroxene while migrating by km‐scale diffuse porous flow through thermal boundary layer (TBL) base of lithosphere. The precipitated orthopyroxene, eventually also plagioclase clinopyroxene within peridotites. Major trace element geochemistry suggests that was depleted melt, i.e., fraction melting...
Research Article| October 01, 1991 Shear zones in the upper mantle: A case study an Alpine Iherzolite massif R.L.M. Vissers; Vissers 1Institute of Earth Sciences, P.O. Box 80.021, Utrecht, Netherlands Search for other works by this author on: GSW Google Scholar M. R. Drury; Drury E. H. Hoogerduijn Strating; Strating D. van der Wal Geology (1991) 19 (10): 990–993. https://doi.org/10.1130/0091-7613(1991)019<0990:SZITUM>2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation...
Journal Article Fluid Assisted Recrystallization in Upper Mantle Peridotite Xenoliths from Kimberlites Get access M. R. DRURY, DRURY * Department of Structural and Applied Geology, Institute Earth Sciences, State University UtrechtPO Box 80.021, 3508 TA Utrecht, The Netherlands *Present address: Mineralogy Research Centre, School Chemistry, Australian National Canberra ACT 2601, Australia. Search for other works by this author on: Oxford Academic Google Scholar H. L. M.VAN ROERMUND...
The two-component model of coffin-shaped intergrown crystals zeolite ZSM-5 has been verified by a combination electron backscattering diffraction and focused ion beam milling (see picture), which respectively revealed the orientation channel system in individual subunits crystal allowed these building blocks to be visualized.