Abstract
The subgrain size and the dislocation density of subgrain interiors were measured by the oxidation-decoration method under the optical microscope on naturally deformed olivine from peridotite xenoliths and alpine-type peridotites. Relation of the subgrain size, d and the dislocation density, ϱ, within subgrains is represented by the equation, d=15/√ϱ. Combining with relations of the differential stress and the dislocation density proposed by Kohlstedt and Goetze (1974), relation between the stress (σ) and the subgrain size becomes d=45 Gb/σ, where G and b are the rigidity and the magnitude of the Burgers vector of olivine. This relation is in good agreement with those in a simple oxide (MgO), and alkali halides (NaCl, LiF) given by Hüther and Reppich (1973), Poirier (1972), and Streb and Reppich (1973), respectively.
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Buiskool Toxopeus, J.M.A., Boland, J.N.: Several types of natural deformation in olivines, and electron microscope study. Tectonophysics 32, 207–233 (1976)
Durham, W.B., Goetze, C., Blake, B.: Plastic flow of oriented single crystals of olivine. 2. Observations and interpretations of the dislocation structures. J. Geophys. Res. 82, 5755–5770 (1977)
Goetze, C., Kohlstedt, D.L.: Laboratory study of dislocation climb and diffusion in olivine. J. Geophys. Res. 78, 5961–5971 (1973)
Green, H.W.: Plasticity of olivine in peridotites. In: Electron microscopy in mineralogy (H.R. Wenk et al., eds.), pp. 443–464. Berlin, Heidelberg, New York: Springer 1976
Green, H.W., Radcliffe, S.V.: Dislocation mechanisms in olivine and flow in the upper mantle. Earth Planet. Sci. Lett. 15, 239–247 (1972)
Groves, G.W., Kelly, A.: Climb of dislocations in magnesium oxide. J. Appl. Phys. 33, 456–460 (1962)
Gueguen, Y.: Dislocations in mantle peridotite nodules. Tectonophysics 39, 231–254 (1977)
Holt, D.L.: Dislocation cell formation in metal. J. Appl. Phys. 41, 3197–3201 (1970)
Hüther, W., Reppich, B.: Dislocation structure during creep of MgO single crystals. Phil. Mag. 28, 363–371 (1973)
Kohlstedt, D.L., Goetze, C.: Low-stress high temperature creep in olivine single crystals. J. Geophys. Res. 79, 2045–2051 (1974)
Kohlstedt, D.L., Vander Sande, J.B.: An electron microscopy study of naturally occurring oxidation produced precipitates in iron-bearing olivines. Contrib. Mineral. Petrol. 53, 13–24 (1975)
Narayan, J., Washburn, J.: Self-climb of dislocation loops in magnesium oxide. Phil. Mag. 26, 1179–1190 (1972)
Nicolas, A., Poirier, J.P.: Crystalline plasticity and solid state flow in metamorphic rocks. 437 pp. London: Wiley 1976
Poirier, J.P.: High temperature creep of single crystalline sodium chloride. Phil. Mag. 26, 701–725 (1972)
Radcliffe, S.V., Green, H.W.: Substructural changes during annealing of deformed olivine: Implications for xenolith tenure in basaltic magma (Abst). EOS Trans. Am. Geophys. Union 54, 453 (1973)
Raleigh, C.B., Kirby, S.H.: Creep in the upper mantle. Mineral. Soc. Am. Spec. Paper 3, 113–121 (1970)
Reppich, B., Hüther, W.: Formation and structure of dislocation networks developed during high-temperature deformation of MgO. Phil. Mag. 30, 1009–1021 (1974)
Streb, G., Reppich, B.: Steady state deformation and dislocation structure of pure and Mg-doped LiF single crystals. II. Etch pit studies of dislocation structure. Phys. Status Solidi 16(a), 493–505 (1973)
Takeuchi, S., Argon, A.S.: Steady-state Andrade creep of single-phase crystals at high temperature. J. Mater. Sci. 11, 1542–1566 (1976)
Toriumi, M., Karato, S.: Experimental studies on the recovery process of deformed olivines and the mechanical state of the upper mantle. Tectonophysics 49, 79–95 (1978)
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Toriumi, M. Relation between dislocation density and subgrain size of naturally deformed olivine in peridotites. Contr. Mineral. and Petrol. 68, 181–186 (1979). https://doi.org/10.1007/BF00371899
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DOI: https://doi.org/10.1007/BF00371899