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Morphology and surface features of olivine in kimberlite: implications for ascent processes
Morphology surface features olivine kimberlite ascent processes
2015/1/6
Most kimberlite rocks contain large proportions of ellipsoidal-shaped xenocrystic olivine grains that are derived mainly from disaggregation of peridotite. Here, we describe the shapes, sizes and surf...
On the complexity of surface ruptures during normal faulting earthquakes: excerpts from the 6 April 2009 L'Aquila (central Italy) earthquake (Mw 6.3)
On the complexity surface ruptures normal faulting earthquakes L'Aquila earthquake
2015/1/6
Over the past few years the assessment of the earthquake potential of large continental faults has increasingly relied on field investigations. State-of-the-art seismic hazard models are progressively...
Seasonal variations of seismicity and geodetic strain in the Himalaya induced by surface hydrology
seismology geodesy tectonics hydrology Himalaya
2014/4/15
One way to probe earthquake nucleation processes and the relation between stress buildup and seismicity is to analyze the sensitivity of seismicity to stress perturbations. Here, we report evidence fo...
Stable isotope compositions of a late Jurassic ammonite shell: a record of seasonal surface water temperatures in the southern hemisphere?
Stable isotope compositions late Jurassic ammonite shell seasonal surface water temperatures
2010/9/28
Exceptional preservation of aragonite secreted by ammonites offers an opportunity to determine the seasonal temperature variations of Mesozoic surface waters. Ontogenetic profiles of carbon and oxygen...
Equivalent Medium Parameters for Numerical Modeling in Media with Near-Surface Low Velocities
Equivalent Medium Parameters for Numerical Modeling Media with Near-Surface Low Velocities
2014/4/10
We have developed a methodology to discretize an isotropic velocity model with low velocities near the free surface for full waveform numerical modeling. The method modifies the near-surface minimum v...