Petrology

1989 Edition

Eclogite facies

  • A. E. Wright
Reference work entry
DOI: https://doi.org/10.1007/0-387-30845-8_59
How to cite
The eclogite facies is based on the distinctive association of omphacite pyroxene and pyroperich garnet forming the rock-type eclogite. Knowledge of rock types other than basic rocks in this facies is very sparse. Yoder and Tilley (1962) give possible assemblages ( Fig. 1). Omphacite–garnet, omphacite–garnet–hypersthene, and omphacite–garnet–kyanite are common parageneses. In those eclogites associated with glaucophane schists, glaucophane is common. Feldspar is normally very minor or absent, but it would appear that anorthite is stable from certain original compositions, such as anorthosite, which is found in places associated with eclogites with the minerals corundum, sapphirine, and zoistite frequently associated with the anorthite. Rare plagioclase eclogites are found. In certain eclogites, other minerals such as phengite, lawsonite, scapolite, brown hornblende, and albite may be found, but these are confined to certain associations. Rutile is an almost constant accessory and both...
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Bibliography

  1. Church, W. R., 1968, Eclogites, in H. H. Hess and A. Poldervaart eds., Basalts, Vol. 2. New York: Wiley Interscience, 755–798.Google Scholar
  2. Coleman, R. G., D. E. Lee, L. B. Beatty, and W. W. Brannock, 1965, Eclogites and eclogites: their differences and similarities, Bull. Geol. Soc. Am. 76, 483–508.Google Scholar
  3. Fairbairn, H. W., 1943, Packing in ionic minerals, Bull. Geol. Soc. Am. 54, 1305–1374.Google Scholar
  4. Friend, C. R. L., 1982, AlOpen image in new windowCr substitution in peraluminous sapphirines from the Bjørnesund area, Fiskanaesset region, southern west Greenland, Mineral. Mag. 46, 323–328.Google Scholar
  5. Kennedy, G. C., 1959, The origin of continents, mountain ranges and ocean basins, Am. Scientist 47, 491–504.Google Scholar
  6. Poldervaart, A., 1953, Petrological calculations in metasomatic processes, Am. J. Sci. 251, 481–504.CrossRefGoogle Scholar
  7. Schreyer, W., 1973, White schist: a high-pressure rock and its geologic significance, J. Geol. 81, 735–738.Google Scholar
  8. Schreyer, W. and K. Abraham, 1975, Peraluminous sapphirine as a metastable reaction product in kyanite-gedrite-talc schist from Sar-e-Sang, Afghanistan, Mineral. Mag. 40, 171–180.Google Scholar
  9. Schreyer, W. and K. Abraham, 1976, Natural boron-free kornerupine and its breakdown products in a sapphirine rock of the Limpopo belt, southern Africa, Contrib. Mineral. Petrol. 54, 109–126.CrossRefGoogle Scholar
  10. Schreyer, W. and F. Seifert, 1969, High pressure phases in the system MgOOpen image in new windowAl2O3–SiO2–H2O. Am. J. Sci. 267, 371–388.CrossRefGoogle Scholar
  11. Wyllie, P. J., 1971, The Dynamic Earth. New York: Wiley.Google Scholar
  12. Yoder, H. S. and C. E. Tilley, 1962, Origin of basalt magmas: an experimental study of natural and synthetic rock systems, J. Petrol. 3, 342–532.Google Scholar

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© Van Nostrand Reinhold 1989

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  • A. E. Wright

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