Physics
Scientific paper
Sep 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978pepi...17..140w&link_type=abstract
Physics of the Earth and Planetary Interiors, Volume 17, Issue 2, p. 140-146.
Physics
3
Scientific paper
Spectra of internal friction between 2 and 8 Hz were studied in a single crystal of enstatite, in a polycrystal of synthetic forsterite and in several samples of natural peridotite. Measurements of Q-1 and μ were performed in vacuum (10-6 torr), from room temperature up to 1100°C. For these experimental conditions no peak was observed in the polycrystalline undeformed forsterite, but the background attenuation irregularly increased from 5 . 10-3 to 10-2. A peak Q-1 = 7 . 10-2 appears in a deformed peridotite at 930°C. It is reduced of 60% after 5 h of annealing at 1100°C. But the background attenuation persists. In the single crystal of enstatite, a peak is observed at 760°C (Q-1 = 6 . 10-2). A mechanism involving dislocations is suggested as a possible explanation for the peak obtained with the peridotite samples. If this hypothesis is right, the observed effect would be diffusion controlled so that one can expect pressure to translate it towards higher temperature. This mechanism could therefore appear in the upper mantle. Background attenuation could be the result of intergranular thermal losses.
Gueguen Yves
Woirgard J.
No associations
LandOfFree
Elastic modulus and internal friction in enstatite, forsterite and peridotite at seismic frequencies and high temperatures does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Elastic modulus and internal friction in enstatite, forsterite and peridotite at seismic frequencies and high temperatures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Elastic modulus and internal friction in enstatite, forsterite and peridotite at seismic frequencies and high temperatures will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-943046