Product Code: ICAL07_P527

Behaviour of Basalt under Shock-wave Induced by Laser: Application to Planetary Hypervelocity Impact Effect
Jerome Gattacceca, CNRS/CEREGE; Université Aix-Marseille 3 France
Laurent Berthe, CNRS/ LALP; Arcueil France
Natalia Bezaeva, CNRS/CEREGE; Université Aix-Marseille 3 France
Michel Boustie, CNRS/LCD; ENSMA France
Pierre Rochette, CEREGE; Université Aix-Marseille 3 France
Thibaut de Rességuier, Laboratoire de Combustion et de Détonique; Cedex France
Presented at ICALEO 2007

Hypervelocity impacts may play a crucial role in the magnetic records of many extraterrestrial bodies (asteroids, Mars, the Moon...). The understanding of remagnetization by hypervelocity impacts is crucial for the interpretation of planetary magnetic anomalies and of the paleomagnetic signal of meteorites. Shocks may also permanently modify the instrinsic magnetic properties of rocks. In order to calibrate experimentally the pressure profile in the impacted materials, we performed laser shocks coupled with VISAR measurement on a number of rock slices of different thickness. These experiments allow the determination of mechanical properties that can be used to model the propagation of the shock wave. Experiment have been done on Basalt rock.

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