Geochemistry of Greisenized Granites and Metasomatic Schist of Tungsten-Tin Deposits in Portugal

  • A. M. R. Neiva
Part of the NATO ASI Series book series (ASIC, volume 218)


Greisenization of S-type granites from Panasqueira and Alijó (Portugal) are compared for both major and trace elements. Tungstentin mineralization is connected with the Panasqueira greisenized cupola while tin-tungsten mineralization is connected with the granite and greisenized granite from Alijó. During greisenization Sn, W, Nb, Ta, Zn, Pb, Rb increase whereas temperature decreases. If tin mineralization dominates, Sn is concentrated in cassiterite and the muscovite of the greisenized granite is depleted in Sn, but richer in W and F than the muscovite of the parental granite. If tungsten mineralization dominates, the muscovite of the greisenized granite has similar W, more Sn and less F than the muscovite of the parental granite. Wolframite is the main carrier of W. F is concentrated in topaz and fluorite.

The muscovite-ripidolite schist from Borralha (Portugal) was contact and metasomatically altered into a muscovite schist with some almandine-spessartine by fluids which originated tungsten quartz veins. Both schists were studied for major and trace elements. The metasomatism was accompanied by increase in W, Nb, Ta, Sn, Rb, Cs and decrease in temperature and log \( ({f_{{H_2}O}}/{f_{HF}}) \). The muscovite of the metasomatic schist is concentrated in F, W, Sn, Rb, Cs, while garnet is concentrated in Nb and Ta.


Quartz Vein Metasomatic Alteration Bishop Tuff Tungsten Mineralization Parental Granite 
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  1. Beach, A. and Fyfe, W. S. (1972). ‘Fluid transport and shear zones at Scourie, Sutherland: evidence of overthrusting?’ Contrib.Mineral.Petrol., 26, 175–180.CrossRefGoogle Scholar
  2. Brown, G. C., Hughes, D. J. and Esson, J. (1973). ‘New X.R.F. data retrieval techniques and their application to U.S.G.S. standard rocks.’ Chem. Geol., 11, 223–229.CrossRefGoogle Scholar
  3. Bussink, R. W. (1984). ‘Geochemistry of the Panasqueira tungsten-tin deposit, Portugal.’ PhD thesis. Geologica Ultraiectina, 33, 170 pp.Google Scholar
  4. Bussink, R. W., Kreulen, R. et De Jong, A. F. M. (1984). ‘Gas analyses, fluid inclusions and stable isotopes of the Panasqueira W-Sn deposits, Portugal.’ Bull. Mineral., 107, 703–714.Google Scholar
  5. Clark, A. H. (1970). ‘Potassium-argon age and regional relationships of the Panasqueira tin-tungsten mineralization.’ Comun. Serviços Geol. Portugal, 54, 243–261.Google Scholar
  6. Eugster, H. P. (1985). ‘Granites and hydrothermal ore deposits: a geochemical framework.’ Min. Mag., 49, 7–23.CrossRefGoogle Scholar
  7. Gresens, R. L. (1966). ‘Composition-volume relations of metasomatism.’ Chem. Geol., 2, 47–65.CrossRefGoogle Scholar
  8. Gunow, A. J., Ludington, S. and Munoz, J. L. (1980). ‘Fluorine in micas from the Henderson molybdenite deposit, Colorado.’ Econ. Geol., 75, 1127–1131.CrossRefGoogle Scholar
  9. Hall, A. (1971). ‘Greisenization in the granite of Cligga Head, Cornwall.’ Proc. Geol. Assoc., 82, 209–230.CrossRefGoogle Scholar
  10. Hildreth, W. (1979). ‘The Bishop Tuff: evidence for the origin of compositional zonation in silicic magma chambers.’ Geol. Soc. Am., Spec. Pap., 180, 43–75.Google Scholar
  11. Ivanova, G. F. (1963). ‘Content of tin, tungsten and molybdenum in granites enclosing tin-tungsten deposits.’ Geochem. Int., 5, 492–500.Google Scholar
  12. Jackson, K. and Helgeson, H. (1985 a). “Chemical and thermodynamic constraints on the hydrothermal transport and deposition of tin: II. Interpretation of phase relations in the Southeast Asian tin belt.’ Econ. Geol., 80, 1365–1378.CrossRefGoogle Scholar
  13. Jackson, K. J. and Helgeson, H. C. (1985 b). ‘Chemica1and thermodynamic constraints on the hydrothermal transport and deposition of tin: I. Calculation of solubility of cassiterite at high pressures and temperatures.’ Geochim. Cosmochim. Acta, 49, 1–22.CrossRefGoogle Scholar
  14. Kelly, W. C. and Rye, R. O. (1979). ‘Geologic, fluid inclusions and stable isotope studies of the tin-tungsten deposits of Panasqueira, Portugal.’ Econ. Geol., 74, 1721–1822.CrossRefGoogle Scholar
  15. Munoz, J. L. and Ludington, S. (1977). ‘Fluorine-hydroxyl exchange in synthetic muscovite and its application to muscovite-biotite assemblages.’ Am. Mineral., 62, 304–308.Google Scholar
  16. Neiva, A. M. R. (1974). ‘Greisenization of a muscovite-biotite albite granite of northern Portugal.’ Chem. Geol., 13, 295–308.CrossRefGoogle Scholar
  17. Neiva, A. M. R. (1980). ‘Chlorite and biotite from contact metamorphism of phyllite and metagraywacke by granite, aplite-pegmatite and quartz veins.’ Chem. Geol., 29, 49–71.CrossRefGoogle Scholar
  18. Noronha, F. (1984). ‘Physico-chemical characteristics of the fluids related to the genesis of the tungsten-ore deposit of Borralha (North Portugal).’ Bull. Mineral., 107, 273–284.Google Scholar
  19. Priem, H. N. A. and Den Tex, E. (1982). ‘Tracing crustral evolution in the NW Iberian Peninsula through Rb-Sr and U-Pbsystematics of Paleozoic granitoids: a review.’ International Colloquium “Géochimie et Pétrologie de granitoides”, Clermont-Ferrand, May 1982, Volume of Abstracts.Google Scholar
  20. Wones, D. R. and Eugster, H. P. (1965).’ stability of biotite: experiment, theory and application.’ Am. Mineral., 50, 1228–1272.Google Scholar

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© D. Reidel Publishing Company 1987

Authors and Affiliations

  • A. M. R. Neiva
    • 1
  1. 1.Department of Mineralogy and GeologyUniversity of CoimbraCoimbraPortugal

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