The Role of Chaotic Dynamics and Flow Fields in the Development of Disequilibrium Textures in Volcanic Rocks

A catalytic delamination-driven model for coupled genesis of Archaean crust and sub-continental lithospheric mantle

“…Kumagai, 2002). The evidence from exposed slab/mantle contacts suggests extensive mechanical and chemical interaction caused by shear heterogeneities (e.g., Bebout and Barton, 2002); while field evidence from syn-kinematic intrusions in lower ophiolitic crust (Bédard et al, 2000), and from lavas and feeder dykes (Perugini et al, 2003), both suggest that hybridization of partially molten bodies subject to shear deformation is fast and easy.…”

The mixing of magmas in plutonic and volcanic environments: Analogies and differences

“…Flinders and Clemens, 1996, Perugini et al, 2003a. From a kinematic point of view, the mixing of magmas is governed by the same stretching and folding processes which are responsible for (a) the development of chaotic dynamics in fluid mixing systems and (b) the production of scale invariant (fractal) patterns, down to the micron-length scale.…”

“…To date, this approach has been undertaken using numerical models and experiments performed with high-temperature and high-viscosity natural and synthetic melts, which have taken into consideration both advection (stretching and folding) and diffusion (e.g. De Campos et al, 2011, Perugini et al, 2003a, 2003b, 2003c. In particular, 2D numerical models have been developed considering mixing of melts (the effects of crystals, bubbles or fluids were not included in the modeling) with similar rheology (i.e.…”

“…The stretching and folding of melts were governed by a simple sinusoidal velocity field that creates complex structures, topologically equivalent to those observed in real rock samples (e.g. Perugini et al, 2003aPerugini et al, , 2003bPerugini et al, , 2003c. A finite difference scheme was used to simulate the chemical a b c Fig.…”

“…However, despite the indisputable importance of magma mixing in modern igneous petrology and volcanology, and the progresses in experimental and numerical modeling strategies (e.g. Bindeman and Perchuk, 1993, De Campos et al, 2011, Perugini et al, 2003a, Zimanowski et al, 2004, we are still far away from understanding even the basic physico-chemical mechanisms associated with this natural phenomenon and their potential impact upon our understanding of igneous systems.…”