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Ferrifayalite-bearing eulysite from Archaean granulites in Qianan county, Hebei, North China

Ferrifayalit-führender Eulysit aus archäischen Granuliten in Qianan, Provinz Hebei, Nord-China

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A meta-ironstone, composed essentially of eulite, almandine and quartz, and locally containing ferrifayalite (Fe4−x (SiO4)2), magnetite, clinopyroxene, biotite, graphite and plagioclase, was discovered at Louzi Mountain, Qianan, Eastern Hebei province, China. Its parent in terms of bulk rock chemistry is probably a Fe-rich sediment. The mineral chemistry and the distribution coefficient of Fe2+ and Mg between coexisting ferromagnesian minerals are defined, and also the inferared and Mössbauer spectra. According to the two-pyroxene geothermometers ofWood andBanno (1973),Saxena (1976), andWells (1977), the equilibrium crystallization temperature of the rock was about 750°C, and the pressure according toWood's method (1974) is about 13 kb at that temperature. It is implied that the rock has undergone granulite facies metamorphism.


Eisenreiche Metasedimente wurden im Gebiet des Mt. Louzi, Qianan, im östlichen Teil der Provinz Hebei, China, entdeckt. Diese bestehen aus Eulite, Almandin und Quarz und führen lokal Ferrifayalit (Fe4−x (SiO4)2), Magnetit, Klinopyroxen, Biotit, Graphit und Plagioklas. Der Gesamtgesteinschemismus weist darauf hin, daß das Ausgangsmaterial ein Fe-reiches Sediment war. Die Zusammensetzung der Minerale und die Verteilungs-Koeffizienten von Fe2+ und Mg zwischen koexistierenden ferromagnetischen Mineralen wurden bestimmt. Zu diesen Daten kommen die Ergebnisse von Infrarot- und Mössbauer-Spektroskopie. Anwendung des Zwei-Pyroxen-Geothermometers nachWood undBanno (1973),Saxena (1976) undWells (1977) ergab Gleichgewichts-Kristallisations-Temperaturen von ca. 750°C. Der Druck (nachWood, 1974) wurde mit 13 kb bestimmt. Dies weist darauf hin, daß die Metasedimente unter Bedingungen der Granulit-Fazies metamorphosiert wurden.

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  1. Albee, A. L., 1965: Distribution of Fe, Mg, and Mn between garnet and biotite in natural mineral assemblages. J. Geol.73, 155–164.

  2. Banno, S., 1970: Classification of eclogites in terms of physical conditions of their origin. Phys. Earth Planet. Interiors3, 405–421.

  3. Bhattacharyya, C., 1971: An evaluation of the chemical distinctions between igneous and metamorphic orthopyroxenes. Amer. Min.56, 499–506.

  4. Cong Bolin, Zhang Wenhua, 1977: Garnet in eclogite. Kexue Tongbao22, 413–416.

  5. Dodd, R. T., Jr., Hanscom, L. G., 1963: Garnet-pyroxene gneisses at Bear Mountain, New York. Amer. Min.48, 811–820.

  6. Ernst, W. G., 1977: Mineralogic study of eclogitic rocks from Alpe Arami, Lepontine Alps, Southern Switzerland. J. Petrol.18, 371–398.

  7. Ferrifayalite Research Group, 1976: Ferrifayalite and its crystal structure. Acta Geologica Sinica2, 160–175.

  8. Green, D. H., Ringwood, A. E., 1967: An experimental investigation of the gabbro to eclogite transformation and its petrological applications. Geochim. Cosmochim. Acta31, 767–833.

  9. Hsu, L. C., 1968: Selected phase relationships in the system Al−Mn−Fe−Si−O: a model for garnet equilibria. J. Petrol.9, 40–83.

  10. Jaffe, H. W., Robinson, P., Tracy, R. J., Ross, M., 1974: Orthoferrosilite in Adirondack gneiss. EOS55, 468–469.

  11. Kretz, R., 1959: Chemical study of garnet, biotite and hornblende from gneisses of Southwestern Quebec, with emphasis on distribution of elements in coexisting minerals. J. Geol.67, 371–402.

  12. Moore, R. K., White, W. B., Long, T. V., 1971: Vibrational spectra of the common silicates: I. The garnets. Amer. Min.56, 54–71.

  13. Müller, R. F., Saxena, S. K., 1977: Chemical Petrology. Berlin-Heidelberg-New York: Springer.

  14. Saxena, S. K., 1968: Distribution of elements between coexisting minerals and the nature of solid solution in garnet. Amer. Min.53, 994–1014.

  15. —, 1973: Thermodynamics of Rock-Forming Crystalline Solutions. Berlin-Heidelberg-New York: Springer.

  16. —, 1976: Two-pyroxene geothermometer: a model with an approximate solution. Amer. Min.61, 643–653.

  17. Smith, D., 1971: Stability of the assemblage iron-rich orthopyroxene-olivine-quartz. Am. J. Sci.271, 370–382 (1971).

  18. Sobolev, V. S. (ed.), 1970: The facies of metamorphics. Moscow: NEDRA.

  19. Tarte, P., Deliens, M., 1973: Correlations between the infrared spectrum and the composition of garnets in the pyrope-almandine-spessartine series. Contr. Min. Petr.40, 25–37.

  20. Wells, P. R. A., 1977: Pyroxene thermometry in simple and complex systems. Contr. Min. Petr.62, 129–139.

  21. Wood, B. J., 1974: The solubility of alumina in orthopyroxene coexisting with garnet. Contr. Min. Petr.46, 1–15.

  22. —,Banno, S., 1973: Garnet-orthopyroxene and orthopyroxene-clinopyroxene relationships in simple and complex systems. Contr. Min. Petr.42, 109–124.

  23. Ying Yupu, Cong Bolin, Li Zhe, Zhang Ruyuan, 1979: A study of the ferrifayalite in eulysite. Kexue Tongbao. (In press.)

  24. Zhang Ruyuan, Cong Bolin, Li Youqin, 1979: Orthopyroxene compositions are determinated by infrared spectrum. Kexue Tongbao. (In press.)

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Zhang, R., Cong, B., Ying, Y. et al. Ferrifayalite-bearing eulysite from Archaean granulites in Qianan county, Hebei, North China. TMPM Tschermaks Petr. Mitt. 28, 167–187 (1981). https://doi.org/10.1007/BF01084626

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  • Crystallization
  • Distribution Coefficient
  • Crystallization Temperature
  • Hebei Province
  • Mineral Chemistry