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Olivine recrystallization textures

Published online by Cambridge University Press:  05 July 2018

Donal M. Ragan
Donal M. Ragan*
Affiliation:
Department of Geology, Arizona State University, Tempe, Arizona 85281
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Summary

Mosaic olivine textures, with straight triple grain boundaries meeting at angles of 120°, are common in dunites. This is a well-known feature of annealed metals, and is the result of grain-boundary migration during recrystallization in which the system tends toward a state of minimum interfacial energies. Geometrically similar textures are present at the boundaries between such mosaic grains and strain-banded relict olivine grains. The unstrained mosaic grains make angular projections into the strained grains exactly at the junctions between the deformation bands. These are interpreted to be triple junctions with the two differently oriented bands acting as separate grains, and thus also due to recrystallization.

Type
Research Article
Information
Mineralogical Magazine , Volume 37 , Issue 286 , June 1969 , pp. 238 - 240
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1969

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References

Challis, (G. A.), 1967. X-ray study of deformation lameIIae in olivines of ultramafic rocks. Min. Mag. 36, 195-203.Google Scholar
Challis, (G. A.) and Lauder, (W. R.), 1966. The genetic position of ‘alpine’ type ultramafic rocks. Bull. Volcanologique, 29, 283-306.Google Scholar
Forbes, (R. B.) and Racan, (D. M.), 1967. Mafic and ultramafic inclusions from basalt of the Hut Point area, Ross Island, Antarctica (abstract). Trans. Amer. Geophys. Union, 48, 255.Google Scholar
Foster, (H. L.), Forbes, (R. B.), and Raoan, (D. M.), 1966. Granulite and peridotite inclusions from Prindle volcano, Yukon-Tanana Upland, Alaska. U.S. Geol. Surv. Prof. Paper 550-B, 1 15-19.Google Scholar
Kretz, (R.), 1966. Interpretation of the shape of mineral grains in metamorphic rocks. Journ. Petrology, 7, 68-94.10.1093/petrology/7.1.68CrossRefGoogle Scholar
Lauder, (W. R.), 1965. The geology of Dtm Mountain, Nelson, New Zealand. Part 2—The petrology, structure, and origin of the ultrabasic rocks. New Zealand Journ. Geol. Geophys. 8, 475-504.10.1080/00288306.1965.10426418CrossRefGoogle Scholar
McLean, (D.), 1957. Grain Boundaries in Metals. London (Oxford University Press).Google Scholar
Ragan, (D. M.), 1963. Emplacement of the Twin Sisters dunite, Washington. Amer. Journ. Sci. 261, 549-65.10.2475/ajs.261.6.549CrossRefGoogle Scholar
Ragan, (D. M.), 1967. Twin Sisters dunite, Washington. In Wyllie, (P. J.), ed., Ultramafic and Related Rocks, pp. 160-7. New York (Wiley).Google Scholar
Raleigh, (C. B.), 1968. Mechanisms of plastic deformation of olivine: Journ. Geophys. Res. 73, 5391-5406.10.1029/JB073i016p05391CrossRefGoogle Scholar
Rast, (N.), 1965. Nucleation and growth of minerals. In Pitcher, (W. S.) and Fhnn, (G. W.), eds., Controls of Metamorphism, pp. 73–102. Edinburgh (Oliver & Boyd).Google Scholar
Rieker, (R. E.) and Sewert, (K. E.), 1964. Shear deformation of uppermantle mineral analogs: tests to 50 kilobars at 27 °C Journ. Geophys. Res. 69, 390I-I I.Google Scholar
Talbot, (J. L.), Hobbs, (B. E.), Wilshire, (H. G.), and Sweatman, (T. R.), 1963. Xenoliths and xenocrysts from the lavas of the Kerguelen Archipelago. Amer. Min. 48, 159-79.Google Scholar