Skip to main content
SpringerLink
Log in

Ore-lead isotope pattern from the Iglesiente-Sulcis Area (SW Sardinia) and the problem of remobilization of metals

  • Published:
Mineralium Deposita Aims and scope Submit manuscript

Abstract

In SW Sardinia syngenetic to syndiagenetic Pb-Zn ores occur in Cambrian carbonates, along the unconformity between the Cambrian and Ordovician, in Permo-Triassic karsts and in vein-type deposits related to late Hercynian granites, which also contact-metamorphosed some Cambrian deposits. In all types of deposits the leadisotope ratios show similarly high μ (=238U/204Pb) and high W (=232Th/204Pb) values indicating a crustal origin for the lead. Most of the Cambrian ores contain isotopically similar or identical leads, whereas in the younger deposits the isotope ratios vary and suggest that especially the lead of Permo-Triassic ores may consist to a large extent of remobilized Cambrian, possibly also Ordovician, ore lead plus a Hercynian component.

The lead of three feldspar samples from Hercynian granites of the area also shows high μ and W values. Two of them are similar to the ore leads from a vein-type deposit and from contact-metamorphosed deposits. The third sample from the Capo Pecora granite contains a very unradiogenic lead that closely resembles many of the presumed Cambrian-Hercynian mixtures. Therefore, the possibility cannot be dismissed that at the time the Permo-Triassic ores were formed lead sources other than the already existing ores were present with the appropriate isotopic compositions.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  • Bechstaedt, Th., Boni, M., Selg, M.: From a clastic tidal shelf to an isolated carbonate platform: an effect of tensional tectonics in the lower Cambrian of SW Sardinia. Facies, 12:113–140 (1985)

    Google Scholar 

  • Benz, J.P.: Le gisement plombo-zincifere d'Arenas (Sardaigne). Travaux du Laboratoire de Sciences de la Terre de l'Ecole des Mines, Nancy, (These): pp 126 (1964)

  • Boni, M.: Il Calcare Ceroide del Cambriano sardo: un deposito di laguna evaporitica? Rend. Soc. Geol. It., 83–85 (1964)

  • Boni, M.: The Permo-Triassic vein- and paleokarst-ores in southwest Sardinia: Contribution of fluid inclusion studies to their paleoenvironmental and genetic problems (in press)

  • Boni, M.: Mississippi valley type ore deposits in southwest Sardinia: a synthesis (in prep.)

  • Boni, M., Amstutz, G.C.: The Permo-Triassic paleokarst ores of SW Sardinia (Iglesiente-Sulcis): an attempt at a reconstruction of paleokarst conditions. In: Ore Genesis: The State of the Art. pp 73–82. Berlin Heidelberg: Springer 1982

    Google Scholar 

  • Boni, M., Cocozza, T., Gandin, A., Perna, G.: Tettonica, sedimentazione e mineralizzazioni delle brecce al bordo sud-orientale della piattaforma carbonatica cambrica (Sulcis, Sardegna). Mem. Soc. Geol. It. 23:111–122 (1981)

    Google Scholar 

  • Boni, M., Malafronte, A.: Structural setting and genesis of ore-bodies in carbonate rocks in the Mte. Atzei — Mte. Ega mining area (Sulcis, SW Sardinia). Min. Dep. 18:57–69 (1983)

    Google Scholar 

  • Brevart, O., Dupre, B., Allegre, C.J.: Metallogenic provinces and the remobilization process studied by lead isotopes: Lead-zinc ore deposits from the Massif Central, France. Econ. Geol. 77:564–575 (1982)

    Google Scholar 

  • Brusca, C., Dessau, G.: I giacimenti piombo-zinciferi di S. Giovanni (Iglesias) nel quadro della geologia del Cambrico Sardo. Ind. Min. 19 (9), (10), (11):470–494 (1968)

    Google Scholar 

  • Carannante, G., Cocozza, T., D'Argenio, B.: Late Precambrian-Cambrian geodynamic setting and tectono-sedimentary evolution of Sardinia (Italy). Boll. Soc. Geol. It. 103 (1):121–128 (1984)

    Google Scholar 

  • Carmignani, L., Cocozza, T., Ghezzo, C., Pertusati, P.C., Ricci, C.A.: Lineamenti del basamento sardo. Soc. Geol. It., Guide Geologiche Regionali: Guida alla geologia del Paleozoico Sardo, 11–23 (1982)

  • Civita, M., Cocozza, T., Forti, P., Perna, G., Turi, B.: Idrogeologia del bacino minerario dell'Iglesiente (Sardegna Sud Occidentale). Mem. Ist. It. Speleol. 2, ser. 11:pp 137 (1983)

    Google Scholar 

  • Cocozza, T., Conti, L., Cozzupoli, D., Lombardi, G., Scharbert, S., Traversa, G.: Rb/Sr age and geo-petrologic evolution of crystalline rocks in southern Sulcis (Sardinia). N. Jb. fuer Geol. and Paleont. Mh., 95–102 (1977)

  • Cocozza, T.: The Cambrian of Sardinia. Mem. Soc. Geol. It. 20:163–187 (1979)

    Google Scholar 

  • Cocozza, T., Jacobacci, A., Nardi, R., Salvadori, I.: Schema stratigrafico-strutturale del massiccio sardo-corso e minerogenesi della Sardegna. Mem. Soc. Geol. It. 13:85–186 (1974)

    Google Scholar 

  • Cumming, G.L., Richards, J.R.: Ore lead isotope ratios in a continuously changing earth. Earth and Planet. Sc. Let. 28:155–171 (1975)

    Google Scholar 

  • Del Moro, A., Di Simplicio, P., Ghezzo, C., Guasparri, G., Rita, F., Sabatini, G.: Radiometric data and intrusive sequence in the Sardinian batholith. N. Jb. fuer Mineralogie, Abh., 126:28–4 (1975)

    Google Scholar 

  • Di Simplicio, P., Ferrara, G., Ghezzo, C., Guasparri, G., Pellizzer, R., Ricci, C.A., Rita, F., Sabatini, G.: Il metamorfismo e il magmatismo paleozoico nella Sardegna. Rend. Soc. It. Petr. 30:979–1068 (1975)

    Google Scholar 

  • Doe, B.R., Zartman, R.E.: Plumbotectonics, the Phanerozoic. In: Geochemistry of Hydrothermal Ore Deposits, ed. H.L. Barnes, pp 22–70. New York: J. Wiley & Sons 1979

    Google Scholar 

  • Gandin, A., Padalino, G., Violo, M.: Correlation between sedimentation environment and ore prospecting. Sedimentological and ore genesis studies of Cambrian “arenarie” and “dolomie rigate” formations (Sardinia, Italy): deposition and concentration of barite in an evaporitic environment. Rend. Soc. It. Min. e Petr. 30:251–303 (1974)

    Google Scholar 

  • Ghezzo, C., Orsini, J.B.: Lineamenti strutturali e composizionali del batolite ercinico sardo-corso in Sardegna. Soc. Geol. It., Guide Geologiche Regionali: Guida alla Geologia del Paleozoico Sardo: 165–181 (1982)

  • Koeppel, V.: Summary of lead isotope data from ore deposits of the Eastern and Southern Alps: some metallogenetic and geotectonic implications. In: H.J. Schneider (ed) Mineral Deposits of the Alps and of the Alpine Epoch, pp 162–168. Berlin Heidelberg: Springer 1983

    Google Scholar 

  • Koeppel, V., Schroll, E.: Lead isotopes of palaeozoic strata-bound to stratiform galena-bearing sulfide deposits of the Eastern Alps (Austria); implications for their geotectonic setting. Schweiz. Min. Petr. Mitt. 63:347–360 (1983)

    Google Scholar 

  • Minzoni, N.: Precambriano nel Sulcis meridionale (Sardegna). Miner. Petr. Acta, 24:51–56 (1980)

    Google Scholar 

  • Moore, J.McM.: Influence of structure on the metal deposits of southwest Sardinia, Italy. Trans. Inst. Min. Met. Sect. B 78:135–147 (1969)

    Google Scholar 

  • Moore, J.McM.: Supergene mineral deposits and physiographic development in southwest Sardinia, Italy. Trans. Inst. Min. Met. Sect. B 81:59–66 (1972)

    Google Scholar 

  • Poll, J.J.K.: The geology of the Rosas — Terreseo area, Suicis, South Sardinia. Leidse Geol. Med. 35:117–208 (1966)

    Google Scholar 

  • Salvadori, I., Zuffardi, P.: Guida per l'escursione a Montevecchio e all'Arcuentu. Itiner. Geol. Min. Giac. in Sardegna, Ente minerario Sardo 1:29–44 (1973)

    Google Scholar 

  • Stacey, J.S., Kramers, J.D.: Approximation of terrestrial lead isotope evolution by a two-stage model. Earth and Planet Sc. Lett 26:207–221 (1975)

    Google Scholar 

  • Stille, H.: Bemerkungen betreffend die „Sardische“ Faltung und den Ausdruck „ophiolitisch“. Zs. Deutsch. Geol. Ges. 91:771–773 (1939)

    Google Scholar 

  • Swainbank, I.G., Shepherd, T.J., Caboi, R., Massoli-Novelli, R.: Lead isotopic composition of some galena ores from Sardinia. Periodico di Mineralogia — Roma 51:275–286 (1982)

    Google Scholar 

  • Wilke, A., Ehrendreich, H., Münch, W., Siebdraht, H.: Montangeologische Untersuchungen in italienischen Blei-Zink-Erz-Bergwerken; a) im Gebiet von Iglesias, Sardinien; b) in den Bergamasker Alpen. Resumé. Erzmetall. 13:459 (1960)

    Google Scholar 

  • Zuffardi, P., Salvadori, I.: Supergene sulfides and sulfates in the supergene zones of sulfide ore deposits. G.C. Amstutz (ed.): Sedimentology and ore genesis, Developments in sedimentology, v. 2, pp 91–99, Elsevier (1964)

  • Zuffardi, P.: Sulla composizione isotopica del piombo di alcune galene sarde e sul suo significato geo-giacimentologico. Symp. sui problemi minerari della Sardegna, Cagliari-Iglesias, Atti pp 33–40 (1965)

  • Zuffard, P.: Remobilization in Sardinian lead-zinc deposits. In: Remobilization of Ores and Minerals. Ente minerario Sardo, Cagliari, 283–292 (1969)

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Dipartimento di Scienze della Terra dell'Università degli Studi di Napoli, L. San Marcellino 10, I-80138, Napoli

    M. Boni

  2. Institute for Crystallography and Petrography, Swiss Federal Institute of Technology, CH-8092, Zuerich

    V. Koeppel

Authors
  1. M. Boni
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. V. Koeppel
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Boni, M., Koeppel, V. Ore-lead isotope pattern from the Iglesiente-Sulcis Area (SW Sardinia) and the problem of remobilization of metals. Mineral. Deposita 20, 185–193 (1985). https://doi.org/10.1007/BF00204563

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00204563

Keywords

Search

Navigation