Nature and origin of kink-bands
1965; Elsevier BV; Volume: 1; Issue: 6 Linguagem: Inglês
10.1016/0040-1951(65)90019-3
ISSN1879-3266
Autores Tópico(s)High-pressure geophysics and materials
ResumoKink-bands are tabular fold-zones resulting from the operation of a shear couple and commonly occur as conjugate sets, usually developing late in the structural history of orogenic systems. The geometry of kink-bands has been investigated in an attempt to determine possible mechanisms of deformation. A theoretical analysis of kink-band geometry, resulting from deformation mechanisms involving flexural-slip and producing continuous simple shear, is presented. Consequently both mechanisms are recognised and the following basic kink-band forms are proposed: joint drags, segregation kink-bands, pelitic strain bands and shear kink bands. Finally the significance of foliation in kink-band systems is discussed and possible stress-fields responsible for kink-band inception are outlined.
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