Abstract
Transmission electron microscopy has been used to observe and analyse the dislocations in a series of plagioclase feldspars which had been experimentally deformed in compression. The results indicate that a moving dislocation in these materials leaves behind a fault in the structure. Two types of fault are observed but both define the slip plane of the associated dislocation. From these observations, together with stuctural considerations, the visibility of the dislocations and the orientatation of the applied shear stress it has been possible to determine the slip system uniquely for a number of dislocations. The origin of the dislocations and the nature of the faults are also discussed.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
I. Y. Borg and H. C. Heard, Contr. Mineral. and Petrol. 23 (1969) 128.
Idem, “Experimental and Natural Rock Deformation” (Springer Verlag, Berlin, 1970) p. 375.
G. W. Lorimer, P. E. Champness and E. T. C. Spooner, Nature P239 (1972) 108.
G. W. Lorimer, H. Nissen and P. E. Champness, Schweiz. Mineral. Petrog. Mitt 54 (1974) 707.
S. White, Contr. Mineral. and Petrol. 50 (1975) 289.
D. B. Marshall and C. J. L. Wilson, ibid (1975) 289.
J. S. Lally, R. M. Fisher, J. M. Christie, D. T. Griggs, A. H. Heuer, G. L. Nord and S. V. Radcliffe, Proceedings of the Third Lunar Science Conference, Houston, Vol. 1 (1972).
J. V. Smith, “Feldspar Minerals”, Vol. 1 (Springer Verlag, Berlin, 1974).
A. C. McLaren and D. B. Marshall, Contr. Mineral. and Petrol. 44 (1974) 237.
A. K. Head, P. Humble, L. M. Clarebrough, A. J. Morton and C. T. Forward, “Computed Electron Micrographs and Defect Identification” (North-Holland, Amsterdam, 1973).
A. C. McLaren, R. G. Turner, J. N. Boland and B. E. Hobbs, Contr. Mineral. and Petrol. 29 (1970) 104.
D. J. Morrison-Smith, Ph.D. Thesis, Australian National University, Canberra (1974).
L. M. Clarebrough, Phys. Stat. Sol. (a) 18 (1973) 427.
Idem, ibid 32 (1975) K5.
J. P. Hirth and J. Lothe, “Theory of Dislocations” (McGraw-Hill, New York, 1968).
J. C. M. Li, Trans. Met. Soc. AIME 227 (1963) 239.
J. S. Williams, B. R. Lawn and M. V. Swain, Phys. Stat. Sol. (a) 2 (1970) 7.
R. W. Cahn, Adv. Phys. 3 (1954) 363.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Marshall, D.B., McLaren, A.C. The direct observation and analysis of dislocations in experimentally deformed plagioclase feldspars. J Mater Sci 12, 893–903 (1977). https://doi.org/10.1007/BF00540970
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00540970