oleiul

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Academic interests

My scientific work focuses mainly on cross-disiplinary problems between physics and geology, and especially fluid-rock interactions at or near the Earth's surface. In particular, I study:

CO₂sequestration in ultramafic rock
Gas hydrate stability and disassociation
Serpentinization
Chemical and mechanical weathering of rock
Volume changing processes in rock
Fracture formation
The coupling between fracture formation and transport of reactive fluids in fractures
Ice-driven fracturing
Numerical tools to study fracture formation

Background

November 2014 –> Researcher, PGP, University of Oslo

August 2010 – November 2014 PhD student, PGP, University of Oslo

August 2008 – June 2010 MSc student, Department of Mathematics, University of Oslo

August 2005 – June 2008 BSc student, Department of Physics, University of Oslo

Tags: Physics, Geology and geophysics, Physics of Geological Processes, Condensed matter physics, Weathering, Volume changing processes, Fracture formation

Austrheim, Håkon Olaf; Hu, Depan; Ulven, Ole Ivar & Andersen, Niels Højmark (2024). Formation of Natural Magnesium Silica Hydrate (M-S-H) and Magnesium Alumina Silica Hydrate (M-A-S-H) Cement. Materials. 17(5). doi: 10.3390/ma17050994. Full text in Research Archive Show summary
Occurrences of natural magnesium alumina silicate hydrate (M-(A)-S-H) cement are present in Feragen and Leka, in eastern and western Trøndelag Norway, respectively. Both occurrences are in the subarctic climate zone and form in glacial till and moraine material deposited on ultramafic rock during the Weichselian glaciation. Weathering of serpentinized peridotite dissolves brucite and results in an alkaline fluid with a relatively high pH which subsequently reacts with the felsic minerals of the till (quartz, plagioclase, K-feldspar) to form a cement consisting of an amorphous material or a mixture of nanocrystalline Mg-rich phyllosilicates, including illite. The presence of plagioclase in the till results in the enrichment of alumina in the cement, i.e., forms M-A-S-H instead of the M-S-H cement. Dissolution of quartz results in numerous etch pits and negative quartz crystals filled with M-A-S-H cement. Where the quartz dissolution is faster than the cement precipitation, a honeycomb-like texture is formed. Compositionally, the cemented till (tillite) contains more MgO and has a higher loss of ignition than the till, suggesting that the cement is formed by a MgO fluid that previously reacted with the peridotite. The M-(A)-S-H cemented till represents a new type of duricrust, coined magsilcrete. The study of natural Mg cement provides information on peridotites as a Mg source for Mg cement and as a feedstock for CO2 sequestration.
Katayama, Ikuo; Abe, Natsue; Hatakeyama, Kohei; Akamatsu, Yuya; Okazaki, Keishi & Ulven, Ole Ivar [Show all 12 contributors for this article] (2020). Permeability Profiles Across the Crust-Mantle Sections in the Oman Drilling Project Inferred From Dry and Wet Resistivity Data. Journal of Geophysical Research (JGR): Solid Earth. ISSN 2169-9313. 125(8). doi: 10.1029/2019JB018698. Full text in Research Archive Show summary
Permeability profiles in the crust‐mantle sequences of the Samail ophiolite were constructed based on onboard measurements of the electrical resistivity of cores recovered during the Oman Drilling Project. For each sample, we measured dry and brine‐saturated resistivity during the description campaign on the drilling vessel Chikyu. Owing to the conductive brine in the pore space, wet resistivity is systematically lower than dry resistivity. The difference between dry and wet resistivity is attributed to the movement of dissolved ions in brine that occupies the pore space. We applied effective medium theory to calculate the volume fraction of pores that contribute to electrical transport. Using an empirical cubic law between transport porosity and permeability, we constructed permeability profiles for the crust‐mantle transition zone and the serpentinized mantle sections in the Samail ophiolite. The results indicate that (1) the gabbro sequence has a markedly lower permeability than the underlying mantle sequence; (2) serpentinized dunites have higher permeability than serpentinized harzburgites; and (3) discrete sample permeability is correlated with ultrasonic velocity, suggesting that the permeability variations predominately reflect crack density and geometry.
Kuleci, Hakan; Ulven, Ole Ivar; Rybacki, Erik; Wunder, Bernd & Abart, Rainer (2017). Reaction-induced fracturing in a hot pressed calcite-periclase aggregate. Journal of Structural Geology. ISSN 0191-8141. 94, p. 116–135. doi: 10.1016/j.jsg.2016.11.009. Full text in Research Archive
Ulven, Ole Ivar & Malthe-Sørenssen, Anders (2017). Reaction-induced fracturing: Chemical-mechanical feedback. In Heinrich, Wilhelm & Abart, Rainer (Ed.), Mineral reaction kinetics: Microstructures, textures, chemical and isotopic signatures. European Mineralogical Union and the Mineralogical Society of Great Britain & Ireland. ISSN 9780903056632. p. 587–615. Full text in Research Archive
Ulven, Ole Ivar; Beinlich, Andreas; Hövelmann, Jörn-Erik; Austrheim, Håkon Olav & Jamtveit, Bjørn (2017). Subarctic physicochemical weathering of serpentinized peridotite. Earth and Planetary Science Letters. ISSN 0012-821X. 468, p. 11–26. doi: 10.1016/j.epsl.2017.03.030. Full text in Research Archive Show summary
Frost weathering is effective in arctic and subarctic climate zones where chemical reactions are limited by the reduced availability of liquid water and the prevailing low temperature. However, small scale mineral dissolution reactions are nevertheless important for the generation of porosity by allowing infiltration of surface water with subsequent fracturing due to growth of ice and carbonate minerals. Here we combine textural and mineralogical observations in natural samples of partly serpentinized ultramafic rocks with a discrete element model describing the fracture mechanics of a solid when subject to pressure from the growth of ice and carbonate minerals in surface-near fractures. The mechanical model is coupled with a reaction–diffusion model that describes an initial stage of brucite dissolution as observed during weathering of serpentinized harzburgites and dunites from the Feragen Ultramafic Body (FUB), SE-Norway. Olivine and serpentine are effectively inert at relevant conditions and time scales, whereas brucite dissolution produces well-defined cm to dm thick weathering rinds with elevated porosity that allows influx of water. Brucite dissolution also increases the water saturation state with respect to hydrous Mg carbonate minerals, which are commonly found as infill in fractures in the fresh rock. This suggests that fracture propagation is at least partly driven by carbonate precipitation. Dissolution of secondary carbonate minerals during favorable climatic conditions provides open space available for ice crystallization that drives fracturing during winter. Our model reproduces the observed cm-scale meandering fractures that propagate into the fresh part of the rock, as well as dm-scale fractures that initiate the breakup of larger domains. Rock disintegration increases the reactive surface area and hence the rate of chemical weathering, enhances transport of dissolved and particulate matter in the weathering fluid, and facilitates CO2 uptake by carbonate precipitation. Our observations have implications for element cycling and CO2 sequestration in natural gravel and mine tailings.
Ulven, Ole Ivar & Sun, WaiChing (2017). Capturing the two-way hydromechanical coupling effect on fluid-driven fracture in a dual-graph lattice beam. International journal for numerical and analytical methods in geomechanics (Print). ISSN 0363-9061. 42(5), p. 736–767. doi: 10.1002/nag.2763. Full text in Research Archive Show summary
Fluid‐driven fractures of brittle rock is simulated via a dual‐graph lattice model. The new discrete hydromechanical model incorporates a two‐way coupling mechanism between the discrete element model and the flow network. By adopting an operator‐split algorithm, the coupling model is able to replicate the transient poroelasticity coupling mechanism and the resultant Mandel‐Cryer hydromechanical coupling effect in a discrete mechanics framework. As crack propagation, coalescence and branching are all path‐dependent and irreversible processes, capturing this transient coupling effect is important for capturing the essence of the fluid‐driven fracture in simulations. Injection simulations indicate that the onset and propagation of fractures is highly sensitive to the ratio between the injection rate and the effective permeability. Furthermore, we show that in a permeable rock, the borehole breakdown pressure, the pressure at which fractures start to grow from the borehole, depends on both the given ratio between injection rate and permeability and the Biot coefficient.
Ulven, Ole Ivar; Jamtveit, Bjørn & Malthe-Sørenssen, Anders (2014). Reaction-driven fracturing of porous rock. Journal of Geophysical Research (JGR): Solid Earth. ISSN 2169-9313. 119(10), p. 7473–7486. doi: 10.1002/2014JB011102. Full text in Research Archive
Ulven, Ole Ivar; Storheim, Håkon; Austrheim, Håkon Olav & Malthe-Sørenssen, Anders (2014). Fracture initiation during volume increasing reactions in rocks and applications for CO2 sequestration. Earth and Planetary Science Letters. ISSN 0012-821X. 389, p. 132–142. doi: 10.1016/j.epsl.2013.12.039. Full text in Research Archive

View all works in NVA

Ulven, Ole Ivar (2018). Oman Drilling Project. Full text in Research Archive
Ulven, Ole Ivar; Austrheim, Håkon Olaf & Jamtveit, Bjørn (2018). Self-induced serpentine deformation and its effect on weathering. Full text in Research Archive
Ulven, Ole Ivar (2017). Serpentinization: Getting water into a low permeability peridotite. Full text in Research Archive
Ulven, Ole Ivar & Sun, WaiChing (2016). Fluid-induced rock transformation modeled via a two-way coupled hydromechanical DEM-network model. Full text in Research Archive
Ulven, Ole Ivar & Sun, WaiChing (2016). Capturing poromechanical coupling effects of the reactive fracturing process in porous rock via a DEM-network model. Full text in Research Archive
Ulven, Ole Ivar (2016). Modeling carbon mineralization. Full text in Research Archive
Ulven, Ole Ivar & Malthe-Sørenssen, Anders (2016). Reaction induced fracturing: chemical-mechanical feedback. Full text in Research Archive
Ulven, Ole Ivar & Sun, WaiChing (2016). A Hydromechanical Model for Serpentinization. Full text in Research Archive
Ulven, Ole Ivar; Austrheim, Håkon Olav; Beinlich, Andreas; Hövelmann, Jörn-Erik & Jamtveit, Bjørn (2015). Subarctic physicochemical weathering of serpentinized peridotite. Full text in Research Archive
Ulven, Ole Ivar; Beinlich, Andreas; Sun, WaiChing; Malthe-Sørenssen, Anders & Austrheim, Håkon Olav (2015). Fracture Formation due to Growth of Hydrous Carbonates. Full text in Research Archive
Ulven, Ole Ivar; Sun, WaiChing & Malthe-Sørenssen, Anders (2015). Fluid transport in reaction induced fractures. Full text in Research Archive
Ulven, Ole Ivar; Austrheim, Håkon Olav; Hövelmann, Jörn-Erik; Beinlich, Andreas & Malthe-Sørenssen, Anders (2014). Fragmentation and Carbonation of Serpentinized Dunites. Full text in Research Archive
Ulven, Ole Ivar (2014). Carbonation of ultramafic rock: Mechanochemical aspects. Det matematisk naturvitenskapelige fakultet. Full text in Research Archive

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Published Jan. 23, 2015 1:28 PM - Last modified Nov. 16, 2016 7:41 PM

oleiul

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