Contributions to Mineralogy and Petrology

, Volume 84, Issue 2–3, pp 146–151 | Cite as

Development of rodingite in basaltic rocks in serpentinites, East Liguria, Italy

  • F. Barriga
  • W. S. Fyfe


Hydrogrossular replacement of plagioclase in basaltic rocks enclosed in serpentinite, and relationships between hydrogrossular, pumpellyite, vesuvianite are described. Rogingitic rocks are dominated by mixed layer chlorite-smectite, chlorite, pumpellyite, hydrogrossular and vesuvianite. In these rocks pumpellyite attains maximal Mg contents, and chemical analysis shows extreme removal of Na2O, K2O, TiO2 and SiO2 from the basalts, and increase in the Fe3+/Fe2+ ratio. Leaching during serpentinization by extremely alkaline solutions dominated by Ca-Mg(OH) may explain removal of components, but the oxidation may suggest that at an earlier stage dykes may have acted as input aquifers.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Abbate E (1969) Geologia delle Cinque Terre e dell'entroterra di Levante (Liguria orientale). Mem Soc It 8:923–1014Google Scholar
  2. Barnes I, O'Neil JR, Trescazes JJ (1978) Present day serpentinization in New Caledonia, Oman and Yugoslavia. Geochim Cosmochim Acta 42:144–145Google Scholar
  3. Barnes I, Rapp JB, O'Neil JR, Sheppard RA, Gude AJ (1972) Metamorphic assemblages and the direction of flow of metamorphic fluids in four instances of serpentinization. Contrib Mineral Petrol 35:263–276Google Scholar
  4. Coda A, Della Giusta A, Isetti G, Mazzi F (1970) On the crystal structure of vesuvianite. Atti Acad Sci Torino 105:1–22Google Scholar
  5. Colby JW (1971) Magic IV, a computer program for quantitative electron microprobe analysis. Bell Telephone Laboratories, Allentown, PennsylvaniaGoogle Scholar
  6. Coombs DS (1953) The pumpellyite mineral series. Mineral Mag 30:113–135Google Scholar
  7. Coombs DS, Nakamura Y, Vaugnat M (1976) Pumpellyite-actinolite fadeis schists of the Taveyanne Formation near Loeche, Valais, Switzerland. J Petrol 17:400–471Google Scholar
  8. Dal Piaz GV (1967) Le granatiti (rodingiti l.s.) nelle serpentine delle Alpi occidentali italiane. Mem Soc Geol It (Pisa) 67:267–313Google Scholar
  9. Ferry JM (1978) Reaction mechanisms, physical conditions, and mass transfer during hydrothermal alteration of mica and feldspar in granitic rocks from South-Central Maine, U.S.A. Contrib Mineral Petrol 68:125–140Google Scholar
  10. Garrels RM, Christ CL (1965) Minerals, solutions, and equilibria. Harper & Row Publ, New York, 541 pGoogle Scholar
  11. Honnorez J, Kirst P (1975) Petrology of rodingites from the equatorial mid-Atlantic fracture zones and their tectonic significance. Contrib Mineral Petrol 49:233–257Google Scholar
  12. Manning PG, Tricker MJ (1975) Optical absorption and Mossbauer spectral studies of iron and titanium site-population in vesuvianites. Can Mineral 13:259–265Google Scholar
  13. Munhá J (1981) Igneous and metamorphic petrology of the Iberian Pyrite Belt volcanic rocks. Ph.D. thesis, Univ West Ontario, 711 pGoogle Scholar
  14. Passaglia E, Gotardi G (1973) Crystal chemistry and nomenclature of pumpellyites and julgoldites. Can Mineral 12:219–223Google Scholar
  15. Rickwood PC (1968) On recasting analyses of garnet into endmember molecules. Contrib Mineral Petrol 18:175–198Google Scholar
  16. Ruckliege JC, Kockman V, Whitlow SH, Gabe EJ (1975) The crystal structures of three Canadian vesuvianites. Can Mineral 13:15–21Google Scholar
  17. Schiffman P, Liou JG (1980) Synthesis and stability relations of Mg-Al pumpellyite, Ca4Al5MgSi6O21(OH)7. J Petrol 21:441–484Google Scholar
  18. Seki Y (1961) Pumpellyite in low grade metamorphism. J Petrol 2:407–423Google Scholar
  19. Spooner ETC, Beckinsale RD, Fyfe WS, Smewing JD (1974) 18O enriched ophiolitic metabasic rocks from E. Liguria (Italy), Pindos (Greece), and Troodos (Cyprus). Contrib Mineral Petrol 47:41–62Google Scholar
  20. Spooner ETC, Fyfe WS (1973) Sub-sea-floor metamorphism, heat and mass transfer. Contrib Mineral Petrol 42:287–304Google Scholar
  21. Warren B, Modell DI (1931) The structure of vesuvianite Ca10Al4(Mg,Fe)2Si9O34(OH)4. Z Kristallogr 78:422–432Google Scholar
  22. Weaver CE, Pollard LD (1973) Chemistry of clay minerals. Developments in Sedimentology, 15, Elsevier, Amsterdam, 213 pGoogle Scholar

Copyright information

© Springer-Verlag 1983

Authors and Affiliations

  • F. Barriga
    • 1
  • W. S. Fyfe
    • 1
  1. 1.Department of GeologyUniversity of Western OntarioLondonCanada
  2. 2.Departamento de GeologiaUniversidade de LisboaPortugal

Personalised recommendations