Original paper

Deformation mechanisms in naturally deformed glaucophanes: a TEM and HREM study

Reynard, Bruno; Gillet, Philippe; Willaime, Christian

European Journal of Mineralogy Volume 1 Number 5 (1989), p. 611 - 624

28 references

published: Nov 16, 1989
manuscript accepted: May 18, 1989
manuscript received: Oct 24, 1988

DOI: 10.1127/ejm/1/5/0611

BibTeX file

ArtNo. ESP147050105001, Price: 29.00 €

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Abstract Deformation mechanisms of glaucophane have been investigated on two naturally deformed samples by optical and TEM microscopy. The two samples were deformed under eclogite facies conditions (15-18 kbar, 550-600 °C) ; one sample suffered in addition a later greenschist deformation (< 10 kbar, 350-450 °C). Under the optical microscope, the glaucophanes display intracrystalline deformation features (undulose extinction, subgrains). TEM observations reveal the operation of glide on several systems: (100)[001], {110}[001], (010)[100], {110} l/2(ll0) and (001) 1/2(110) at medium temperature (550-600 °C) and (010)[001] at low temperature (350-450 °C). Minor (100) twinning is associated. The presence of subgrains bounded by well-organized dislocation walls indicates that recovery processes are active.


glaucophaneclinoamphiboledeformation mechanismsTEMHREM