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Contributions to Mineralogy and Petrology

, Volume 16, Issue 4, pp 328–353 | Cite as

The problem of rock assimilation by Somma-Vesuvius magma

I. Composition of Somma and Vesuvius lavas
  • Carlo Savelli
Article

Abstract

New chemical and modal analyses are presented of magmatic rocks and pyroxenes nodules from the Somma-Vesuvius volcano and of trachytes from the surrounding area. Geochemical evidence is employed in checking the generally accepted suggestion that magma composition develops from that of trachyte into phonolitic tephrite and finally into tephritic leucitite (vesuvite) by assimilation of dolomite.

At the Somma stage of the volcano, phonolitic tephrites (tephritic phonolites) alone have been produced. Vesuvius lavas (tephritic leucitites) are comparatively high in K2O, CaO, F, Cl, Mn, Cu, Sr and Ba and low in SiO2 and Nb. The formation of vesuvites by assimilation of dolomitic sedimentary rocks, combined with gravity-separation of early-formed pyroxenes from a trachytic or tephritic magma, is improbable as shown by chemical balances between the respective igneous and sedimentary rocks.

Keywords

Nodule SiO2 Assimilation Dolomite Mineral Resource 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Althaus, E.: Die Atom-Absorptions-Spektralphotometrie ein neues Hilfsmittel zur Mineralanalyse. N. Jb. Mineral. Mh. 9, 259–280 (1966).Google Scholar
  2. Begemann, F., J. Geiss, u. F. G. Houtermans: Isotopenzusammensetzung und Radioaktivität von rezentem Vesuvblei. Nuovo Gimento 11, 663–673 (1964).Google Scholar
  3. Bowen, N. L.: The evolution of the igneous rocks. New York: Dover Publ. 1956.Google Scholar
  4. Carmichael, I. S. F.: The mineralogy and petrology of the volcanic rocks from the Leucite Hills, Wyoming. Contr. Mineral. and Petrol. 15, 24–66 (1967).Google Scholar
  5. Eaton, J. P., and K. J. Murata: How volcanoes grow. Science 132, 925–938 (1960).Google Scholar
  6. El Hinnawi, E. E.: Petrochemical characters of African volcanic rocks. Part III: Central Africa. N. Jb. Mineral. Abh. 103, 126–146 (1965).Google Scholar
  7. Hamilton, D. L., and W. S. MacKenzie: Phase equilibrium studies in the system NaAlSiO4-KAlSiO4-SiO2-H2O. Mineral. Mag. 34, 214–223 (1965).Google Scholar
  8. Higazy, R. A.: Trace elements of volcanic ultrabasic potassic rocks of southwestern Uganda and adjoining part of the Belgian Congo. Bull. Geol. Soc. Amer. 65, 39–59 (1954).Google Scholar
  9. Hillebrand, W.F., G.E.F., Lundell, H.A., Bright, and J.I. Hoffman: Applied inorganic analysis. New York: John Wiley & Sons 1953.Google Scholar
  10. Hoefs, J.: Personal communication (1967).Google Scholar
  11. Holmes, A., and H. F. Harwood: Petrology of the volcanic fields east and south east of Ruwenzori, Uganda. Quart. J. Geol. Soc. 88, 3, 370 (1932).Google Scholar
  12. Houtermans, F. G., A. Eberhardt, and G. Ferrara: Lead of volcanic origin. In: Isotopic and cosmic chemistry (H. Craig ed.). Amsterdam: North-Holland Publ. Co. 1964.Google Scholar
  13. Lacroix, A.: Étude minéralogique des produits silicatés de l'éruption du Vésuve (avril 1906). Nouv. Arch. Muséum, Paris, 4e sér., 9 (1907).Google Scholar
  14. — Les roches grenues d'un magma leucitique étudiées à l'aide des blocs holocristalins de la Somma. C. R. (Paris) 165, 205–216 (1917).Google Scholar
  15. Lohmann, L.: Ein Beitrag zur Petrographie Melilith-führender Olivinnephelinite aus dem Gebiet Fritzlar-Naumberg (Nordhessen). Beitr. Mineral. u. Petrog. 9, 533–584 (1964).Google Scholar
  16. Narici, E.: Contributo alla Petrografia chimica della Provincia magmatica Campana e del Monte Vulture. Z. Vulk. 14, 210–247 (1932).Google Scholar
  17. Richter, D. H., and J. G. Moore: Petrology of the Kilauea Iki Lava Lake Hawaii. Geol. Surv. Prof. Paper 537-B (1966).Google Scholar
  18. Rittmann, A.: Die geologisch bedingte Evolution und Differentiation des Somma-Vesuvmagma. Z. Vulk. 15, 8–94 (1933).Google Scholar
  19. — Nomenclature of volcanic rooks. Bull. volc., sér. II, 12, 75–102 (1952).Google Scholar
  20. — Vulkane und ihre Tätigkeit. Stuttgart: Ferdinand Enke 1960.Google Scholar
  21. Rosenblum, S.: Improved techniques for staining potash feldspars. Amer. Mineralogist 41, 662–666 (1956).Google Scholar
  22. Schmucker, U.: Gesteinsmagnetische Messungen und Experimente am Basalt des Steinberges bei Barlissen. Abh. Ges. Wiss. Göttingen, math.-physik. Kl. 26, 1–100 (1957).Google Scholar
  23. Seraphim, R. H.: Some aspects of the geochemistry of fluorine. Ph. D. Thesis, M. I. T., Cambridge, Mass. (1951).Google Scholar
  24. Shand, S. J.: On staining of felspatoids and on zonal structure in nepheline. Amer. Mineralogist 24, 508–511 (1939).Google Scholar
  25. Slemmons, D. B.: Determination of volcanic and plutonic plagioclases using a three-or four-axis universal stage. Geol. Soc. Amer. Spec. Paper 69, 1–64 (1962).Google Scholar
  26. Smit, J. A., and A. J. H. Vendrik: Ionization of metal vapours in a flame. Physika 14, 505 (1948).Google Scholar
  27. Stevens, R. E.: Second report on a cooperative investigation of the composition of two silicate rocks. U. S. Geol. Surv. Bull. 1113 (1960).Google Scholar
  28. Streckeisen, A.: Zur Klassifikation der Eruptivgesteine. N. Jb. Mineral. Mh. 5/6, 195–222 (1964).Google Scholar
  29. Taddeucci, A.: Il boro ed il fluoro nelle regioni vuleaniche dei Colli Albani, del Cimino e di Vico. Per. Mineral. 33, 73–145 (1964).Google Scholar
  30. Terry, R. D., and G. V. Chilingar: Summary of Concerning some additional aides in studying sedimentary formations. J. Sed. Petrol. 25, 3, 229–234 (1955).Google Scholar
  31. Turekian, H. K., and K. H. Wedepohl: Distribution of the elements in some major units of earth's crust. Bull. Geol. Soc. Amer. 72, 175 (1961).Google Scholar
  32. Turner, F. J., and J. Verhoogen: Igneous and metamorphic petrology. New York: McGrawHill Book Co. 1960.Google Scholar
  33. Tuttle, O. F., and N. L. Bowen: Origin of granite in the light of Na-K-felspar-SiO2-H2O system. Geol. Soc. Amer. Mem. 74, 1–153 (1958).Google Scholar
  34. Wade, A., and R. T. Prider: The leucite-bearing rocks of the west Kimberley area, Western Australia. Quart. J. Geol. Soc. 96, 39 (1940).Google Scholar
  35. Washington, H. S.: The roman comagmatic region. Carnegie Instu. Publ. 57 (1906).Google Scholar
  36. — Chemical analyses of igneous rocks. Prof. Paper Washington No. 99, 1–1201 (1917).Google Scholar
  37. Wedepohl, K. H.: Geochemische und petrographische Untersuchungen an einigen jungen Eruptivgesteinen Nordwestdeutschlands. Fortschr. Mineral. 39, 142–148 (1961).Google Scholar
  38. — Die Röntgen-Fluoreszenz-Spektralanalyse von geochemischen Proben auf Elemente der Ordnungszahlen 25–40. Z. analyt. Chem. 180, 246–259 (1961).Google Scholar
  39. Zambonini, F.: Mineralogia Vesuviana. Torino: Rosenberg & Sellier 1936.Google Scholar

Copyright information

© Springer-Verlag 1967

Authors and Affiliations

  • Carlo Savelli
    • 1
  1. 1.Geochemisches Institut der Universität GöttingenDeutschland

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