Some thoughts about eclogites and related rocks

M Brown - European Journal of Mineralogy, 2023‏ - ejm.copernicus.org
The past 40 years have been a golden age for eclogite studies, supported by an ever wider
range of instrumentation and enhanced computational capabilities, linked with ongoing …

P‐Wave Velocities Across the α → β Quartz Transition at Lower Continental Crust Pressure and Temperature Conditions

A Moarefvand, J Gasc, D Deldicque… - Journal of …, 2024‏ - Wiley Online Library
The quartz α→ β transition is a displacive phase transition associated with a significant
change in elastic properties. However, the elastic properties of quartz at high‐pressure and …

Deep‐focus earthquake mechanisms at the subducting Nazca plate (Peru‐Brazil border): Cold slab behavior in a warm plate

GS Leite Neto, J Julià, GA Prieto - Earth and Space Science, 2024‏ - Wiley Online Library
We calculate focal mechanisms and centroid depths for deep‐focus earthquakes (DFEs)
along the Peru‐Brazil border. We obtained a total of 28 focal solutions for events with …

A new generation Griggs apparatus with active acoustic monitoring

A Moarefvand, J Gasc, J Fauconnier, M Baïsset… - Tectonophysics, 2021‏ - Elsevier
High pressure and temperature experiments are necessary to understand geological
processes at deep earth conditions. Here, we present a new generation Griggs-type …

Rapid ductile strain localization due to thermal runaway

A Spang, M Thielmann, D Kiss - Journal of Geophysical …, 2024‏ - Wiley Online Library
Thermal runaway is a ductile localization mechanism that has been linked to deep‐focus
earthquakes and pseudotachylyte formation. In this study, we investigate the dynamics of …

Numerical investigation into mechanical behavior of metastable olivine during phase transformation: Implications for deep‐focus earthquakes

S Sindhusuta, SW Chi, C Foster… - … Research: Solid Earth, 2025‏ - Wiley Online Library
One hypothesized mechanism that triggers deep‐focus earthquakes in oceanic subducting
slabs below∼ 300 km depth is transformational faulting due to the olivine‐to‐spinel phase …

[HTML][HTML] Ductile vs. brittle strain localization induced by the olivine–ringwoodite transformation

J Gasc, B Gardonio, D Deldicque, C Daigre… - Minerals, 2022‏ - mdpi.com
As it descends into the Earth's mantle, the olivine that constitutes the lithosphere of
subducting slabs transforms to its high-pressure polymorphs, wadsleyite and ringwoodite, in …

Modeling of olivine-spinel phase transformation of germanate olivine (Mg2GeO4) by using the phase-field method

S Sawa, J Muto, H Nagahama - Physics of the Earth and Planetary Interiors, 2023‏ - Elsevier
Olivine is the main constituent of the upper mantle, and its phase transformation affects the
rheology of the subduction zone. It is crucial to reveal the kinetics of the olivine (α)-spinel (γ) …

Phase Transformation Characterization of High-Pressure Olivine Polymorphs in Shocked Meteorites using STEM-EDS and 4D-STEM

TM Abbott, S Ribet, H Bausch, L Gardner, K Bustillo… - 2024‏ - academic.oup.com
Understanding the physical and chemical properties of high-pressure minerals is essential
to understanding the structure and composition of the Earth's interior [1]. However …

P-wave velocities across the α→ β quartz transition at lower continental crust pressure and temperature conditions

A Moarefvand, J Gasc, D Deldicque, L Labrousse… - Authorea …, 2023‏ - authorea.com
The quartz α→ β transition is a displacive phase transition associated with a significant
change in elastic properties. However, the elastic properties of quartz at high-pressure and …