Mechanical data from rotary shear experiments on material derived from outcrops felsic and mafic rocks in the East African Rift Zone

Hellebrekers, Nina

2019

In all experiments, multiple series of velocity-steps were performed to obtain the velocity dependence of friction. The data can be modeled using rate-and-state friction equations (see Marone, 1998). We used the rate-and-state friction tool included in the XLOOK program to invert the data for...

Frictional properties of simulated shale-coal fault gouges: Implications for induced seismicity in source rocks below Europe’s largest gas field

Liu, Jinfeng | Hunfeld, Luuk Bernd | Niemeijer, André Rik | Spiers, Christopher James

2019

We report 21 frictional sliding experiments performed on simulated fault gouges prepared from shale-coal mixtures. Our aim was to investigate the effects of local coal seam smearing on the frictional properties and induced seismogenic potential of faults cutting the Upper Carboniferous source...

Multi-scale electron crystal-orientation diffraction of seismically active carbonate fault rocks

Ohl, Markus

2020

We determine the active deformation mechanisms in two active carbonate fault zones in Greece. Detailed slip-system analyses in combination with high-resolution nanostructural investigations show a throughout contribution of crystal plasticity, evident from subgrain-wall misorientations....

Friction and compaction data of simulated fault gouges derived from the Basal Zechstein caprock of the Groningen gas field

Hunfeld, Luuk Bernd

2019

We investigated the rate-and-state frictional properties of simulated anhydrite-carbonate fault gouge derived from the Basal Zechstein caprock overlying the seismogenic Groningen gas reservoir in the NE Netherlands. Direct shear experiments were performed at in-situ conditions of 50-150 °C...

Data associated to the research on Titanite geochronology and thermometry

Pablo Farias

2020

U-Pb geochronology and Zr-in-titanite thermometry on titanite from Argentina. The project is about understanding the tectonic evolution of the Cambrian-Ordovician Famatinian Orogen in NW Argentina. Titanite was used to date the time of metamorphism as well as the temperature associated with its...

Intergranular clay films control inelastic deformation in the Groningen gas reservoir: Evidence from split-cylinder deformation tests

Pijnenburg, Ronald | Verberne, Berend Antonie | Hangx, Suzanne | Spiers, Christopher James

2019

Production of oil and gas from sandstone reservoirs leads to small elastic and inelastic strains in the reservoir, which may induce surface subsidence and seismicity. While the elastic component is easily described, the inelastic component, and any rate-sensitivity thereof remain poorly...

Micro-XCT images, grain size distributions and mechanical data used in: "Uniaxial compaction of sand using 4D X-ray tomography: The effect of mineralogy on grain-scale compaction mechanisms."

Van Stappen, Jeroen. F. | Hangx, Suzanne J.T.

2020

The mechanical behaviour of sand aggregates is often studied as a proxy for poorly consolidated sands and highly porous sandstones. Only recently research aimed at understanding sand deformation has started to use techniques that allow for direct observation of the in-situ grain-scale...

Large-scale biaxial experiments on gypsum-gouge faults and a bare PMMA fault: Mechanical data and selected strain and image data

Buijze, Loes

2019

Geodetic observations and large-scale laboratory experiments show that seismic instability is preceded by slow slip within a finite nucleation zone. In laboratory experiments rupture nucleation is studied mostly using bare (rock) interfaces, whereas upper crustal faults are typically filled...

Frictional healing data from direct shear slide-hold-slide experiments performed on simulated fault gouges from the Groningen gas field

Hunfeld, Luuk Bernd

2020

We investigated the frictional strength recovery (healing) and subsequent reactivation and slip-weakening behaviour of simulated fault gouges derived from key stratigraphic units in the seismogenic Groningen gas field (N.E. Netherlands). Direct-shear, Slide-Hold-Slide (SHS) experiments were...

Pb isotopic data of the Yangtze Gravel

Zengjie Zhang

2020

Pb isotopic compositions and zircon U-Pb data for the late Cretaceous-Quaternary from the middle-lower Yangtze River.