Advances in the rheology of natural multiphase silicate melts: Import for magma transport and lava flow emplacement

Abstract

A review of recent advances in the field of rheology of multicomponent silicate melts and multiphase silicate melt and multiphase silicate melt and analogue material suspensions is presented. is presented here. The advances include the development of new experimental de− vices and field and remote sensing methods for measuring the rheological properties of natural melts and magmas as well as new mod− elling strategies. These promising approaches combine laboratory experiments, theoretical models, numerical simulations and remote sens− ing data derived from ground, airborne and satellite−based tools. Each of these sub−disciplines has evolved rapidly in recent years and the growing range of complementary data appears now to provide an opportunity for the development of multi−disciplinary research. Ul− timately, these multidisciplinary initiatives seek to provide near−real−time forecasting of hazardous volcanic processes such as lava flow field evolution. The results and approaches described here focus on multiphase (i.e. melts, bubbles, crystals) rheology of natural systems and are pertinent to the effusive emplacement of lavas, dykes and sills, as well as, to the eruption dynamics attending explosive eruptions.

Viscosity of Pyroxenite Melt and Its Evolution During Cooling

“…Nonetheless, given the nonlinear dynamics of lava flows and domes, which may determine remarkable thermal effects, significant limitations may be observed and should be carefully considered before applying this method to any natural context (Giordano, , and reference therein).…”

Porcelain versus Porcelain Stoneware: So Close, So Different. Sintering Kinetics, Phase Evolution, and Vitrification Paths

“…In fact, it is known that firing deformations depend on the amount and viscosity of the liquid phase, which is responsible for flow movements at the origin of pyroplastic effects [55,58]. Nevertheless, solid particles do contrast such deformations, in a more or less effective manner in function of amount, size and shape of the crystalline compounds constituting the skeleton [57,59,60]. It can be said that the dimensional stability of the bodies at the maximum temperature is related with the bulk viscosity of the body, here called effective viscosity (η eff ), which combines melt and crystals effects.…”

A comprehensive database of crystal-bearing magmas for the calibration of a rheological model

“…As a function of the different magma composition, bubble and crystal contents and physical conditions (i.e. strain rate), its rheological response varies 1 – 6 . Due to the complexity of such a polyphase system, several open questions remain for an exhaustive comprehension of magma rheology.…”