Growth of deformation bands into echelon and ladder geometries

Details Growth of deformation bands into echelon and ladder geometries Growth of deformation bands into echelon and ladder geometries

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30tsde5s&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 20, pp. SDE 5-1, CiteID 2033, DOI 10.1029/2003GL018449

Physics

4

Structural Geology: Fractures And Faults, Structural Geology: Mechanics, Structural Geology: Mesoscopic Fabrics, Tectonophysics: Continental Tectonics-General (0905), Tectonophysics: Rheology-Crust And Lithosphere

Scientific paper

We investigate the growth of cataclastic deformation bands in porous sandstone into Riedel, ladder, and ``radiator rock'' arrays. New field observations and mechanical modeling of DB growth using the distortional strain energy density criterion demonstrate that the physical control of these geometries is a contractional (mode-II) stepover between two echelon bands. Propagation of bands under pre-peak conditions, before Coulomb frictional sliding (faulting) begins, is not impeded by the echelon stepover geometry (as it is for brittle fractures under peak stress); continued in-plane growth of echelon bands creates ladders from stepovers. Successive addition of stepovers/ladders along their shearing direction produces Riedel geometries, whereas addition normal to strike produces radiator rock (the damage zone) as a consequence of strain hardening of bands and linked stepovers. The new framework has implications for fluid flow in groundwater aquifers, hydrothermal and precious metals systems, and petroleum fields.

Affiliated with

Also associated with

No associations

Rating

Growth of deformation bands into echelon and ladder geometries 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 Growth of deformation bands into echelon and ladder geometries, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Growth of deformation bands into echelon and ladder geometries will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-918700