Experimental constraints on volcanic ash generation and clast morphometrics in pyroclastic density currents and granular flows

In situ production of ash in pyroclastic flows

[1] Abrasion and comminution of pumice clasts during the propagation of pyroclastic flows have long been recognized as a potential source for the enhanced production of volcanic ash, however, their relative importance has eluded quantification. The amount of ash produced in situ can potentially affect runout distance, deposit sorting, the volume of ash introduced in the upper atmosphere, and in...

Experimental study of turbulence, sedimentation, and coignimbrite mass partitioning in dilute pyroclastic density currents

Reconciling Pyroclastic Flow and Surge: the Multiphase Physics of Pyroclastic Density Currents

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Minerals in Volcanic Ash 1: Primary Minerals and Volcanic Glass

Volcanic ash is fragments of magma, and consists of minerals and volcanic glass. These materials in the ash can provide important information on the nature of the magma, because chemical compositions of magma usually show distinct features in each volcano, and because assemblages and compositions of minerals reflect their host melt. Using assemblages and chemical compositions of minerals and gl...

simulation and experimental studies for prediction mineral scale formation in oil field during mixing of injection and formation water

abstract: mineral scaling in oil and gas production equipment is one of the most important problem that occurs while water injection and it has been recognized to be a major operational problem. the incompatibility between injected and formation waters may result in inorganic scale precipitation in the equipment and reservoir and then reduction of oil production rate and water injection rate. ...