X-ray Diffraction of Shock-Compressed Gibeon Meteorite to 136 GPa
Abstract
We use natural kamacite and taenite samples from a Gibeon meteorite as a proxy for terrestrial cores to examine the phase transition kinetics under shock compression to 130 GPa. We collected in situ time-resolved x-ray diffraction (XRD) of kamacite and taenite transforming to high pressure hexagonal close packed (hcp) phase with femtosecond temporal resolution using the Matter in Extreme Conditions (MEC) end-station at the Linac Coherent Light Source (LCLS), the 4th generation x-ray free electron laser (xFEL) at SLAC National Accelerator Laboratory. Results of this study present new information for diffraction-based dynamic equations of state, and focus on phase transition kinetics and structural evolution.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFMMR51B0034T
- Keywords:
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- 5112 Microstructure;
- PHYSICAL PROPERTIES OF ROCKS;
- 7209 Earthquake dynamics;
- SEISMOLOGY;
- 8034 Rheology and friction of fault zones;
- STRUCTURAL GEOLOGY;
- 8159 Rheology: crust and lithosphere;
- TECTONOPHYSICS