Ductile fracture of fine-grained plagioclase in the brittle-plastic transition regime: implication for earthquake source nucleation

Details Ductile fracture of fine-grained plagioclase in the brittle-plastic transition regime: implication for earthquake source nucleation Ductile fracture of fine-grained plagioclase in the brittle-plastic transition regime: implication for earthquake source nucleation

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004e%26psl.222.1007s&link_type=abstract

Earth and Planetary Science Letters, Volume 222, Issue 3-4, p. 1007-1022.

Physics

7

Crush Zone, Fine-Grained Plagioclase, Plastic Deformation, Microvoid, Ductile Fracture

Scientific paper

Crush zones along strain-localized zones of plastic deformation were found in a small natural brittle-plastic shear zone in the Abukuma Mountains, NE Japan. The optical microstructures indicate that crush zones are developed where plastic deformation is strong. Scanning electron microscopy (SEM) revealed the presence of microvoids which connect together to form intergranular fractures in fine-grained plagioclase layers in strain-localized zones with crush zones. This suggests that the microvoids coalesce in the fine-grained plagioclase layers allowed ductile fracture to form crush zones during plastic deformation. Transmission electron microscopy (TEM) revealed that the dislocation densities of all grains in fine-grained plagioclase layers in strain-localized zones with crush zones are high, while evidence for grain boundary migration and dynamic recrystallization is found away from crush zones. During plastic deformation of plagioclase in the brittle-plastic transition regime, strong plastic deformation with insufficient recrystallization may have resulted in the nucleation of microvoids which link together to form intergranular fractures. This process may be an important mechanism during earthquake source nucleation.
Present address: JR Tokai Construction Co. Ltd., Nakamura-ku, Nagoya 453-0014, Japan.

Affiliated with

Also associated with

No associations

Rating

Ductile fracture of fine-grained plagioclase in the brittle-plastic transition regime: implication for earthquake source nucleation 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 Ductile fracture of fine-grained plagioclase in the brittle-plastic transition regime: implication for earthquake source nucleation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ductile fracture of fine-grained plagioclase in the brittle-plastic transition regime: implication for earthquake source nucleation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-891786