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Barbara Bonechi on Muck Rack

Barbara Bonechi

As seen in: Nature
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Articles

Superheating in mafic magmas controls clinopyroxene nucleation delay and magma ascent dynamics

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By Barbara Bonechi, Fabio Arzilli, Margherita Polacci, Giuseppe La Spina, Eleni Michailidou, Elisa Biagioli, Richard A. Brooker, Jean-Louis Hazemann, Robert Atwood, Danilo Di Genova, David Neave, Renat Almeev, Mike Burton, Alessandro Fabbrizio, Sumith Abeykoon
| Nature Verified
Abstract Crystallisation kinetics play a fundamental role in controlling conduit dynamics and eruptive style. The degree of superheating is critical in controlling crystallisation kinetics; however, its effect is still debated and has an unclear impact on eruption dynamics. Here, we investigate how superheating influences clinopyroxene nucleation in tephritic magmas from the 2021 Tajogaite eruption (La Palma, Spain) through both in situ and ex situ view experiments.
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Cubic Fe-bearing majorite synthesized at 18–25 GPa and 1000 °C: implications for element transport, subducted slab rheology and diamond formation - Scientific Reports

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By Luca Bindi, Steeve Gréaux, Sonja Aulbach, Catherine McCammon, Barbara Bonechi
| Nature Verified
Abstract The chemistry and mineralogy of slabs subducted into lower mantle control slab rheology and impact the deep volatile cycle. It is known that the metamorphism of little-altered oceanic crust results in eclogite rocks with subequal proportions of garnet and clinopyroxene. With increasing pressure, these minerals react to stabilize pyrope-rich tetragonal majoritic garnet.
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