Skip to main content
SpringerLink
Log in

Occurrence and40Ar/39Ar dating of a granite in Thera (Santorini, Greece)

  • Published:
Geologische Rundschau Aims and scope Submit manuscript

Zusammenfassung

Auf der Insel Thera, im Attiko-Kykladishen Gürtel, ist ein Granitkörper in einer Tiefe von ca. 250 m durch eine Bohrung aufgedeckt. Dieser Granitkörper ist in metamorphen Gesteinen von Blauschiefer-Facies intrudiert. K-Ar-Biotit- und Ar-Ar-Feldspat-Altersbestimmungen streuen um 9.5 Ma. Diese Alter weisen auf rasche Abkühlung des Granitkörpers hin. Es zeigt sich somit, daß die thermometamorphe Entwicklung des Attiko-Kykladischen Gürtels bis zur Insel Thera reicht.

Abstract

A granite was drilled in the prevolcanic basement of Thera, an island of the Attico-Cycladic belt. It intruded the blueschist facies country rocks. K-Ar biotite ages and Ar-Ar plateau ages on two feldspars indicate rapid cooling, as all ages cluster around 9.5 Ma. Its occurrence indicates that the thermometamorphic evolution that characterizes the Attiko-Cycladic belt extends as far as Thera.

Résumé

Un forage a été pratiqué dans un granite du socle pré-volcanique de l'île de Thera, qui appartient à la ceinture attico-cycladique. Ce granite a intrudé les roches encaissantes de facies schistes bleus. Les datations effectuées sur les biotites par la méthode K-Ar et les âges-plateau des feldspaths obtenus par la méthode Ar-Ar indiquent un refroidissement rapide, puisque tous les âges sont de l'ordre de 9,5 Ma. Ce granite montre que l'évolution thermométamorphique qui caractérise la ceinture Attico-Cycladique s'étend jusqu'à l'île de Thera.

Краткое содержание

При бурении на остров е Thera в аттикокикладско м поясе установили на г лубине 250 м присутствие гранитн ого тела. Это тело интр удировано в метаморфические по роды фация голубого сланца. Иссл едования с помощью методов калия/аргона по биотитам и аргона/ аргона по полевым шпа там дали возраст этих пород примерно 9,5 ма. Эт о говорит о том, что охлаждение грани тного тела протекало довольно быстро. Т.о. уд алось показать, что термометаморфизм за хватывал и остров Thera.

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.

Institutional subscriptions

References

  • Altherr, R. (1981): Zur Petrologie der miozänen Granitoide der Zentral — Agäis (Griechenland).- Dr. habil. thesis, Univ. Braunschweig, F.R.G., 218 p.

    Google Scholar 

  • —,Schliestedt, M., Okrusch, M., Seidel, E., Kreuzer, H., Harre, W., Lenz, H., Wendt, I. &Wagner, G.A. (1979): Geochronology of High-Pressure rocks on Sifnos (Cyclades, Greece). - Contrib. Mineral. Petrol.,70, 245–255.

    Google Scholar 

  • —Kreuzer, H., Wendt, I., Lenz, H., Wagner, G.A., Keller, J., Harre, W. &Hohndorf, A. (1982): A Late Oligocene/Early Miocene High Temperature Belt in the Attic-Cycladic Crystalline Complex (SE Pelagonian, Greece). - Geol. Jb.E23, 97–164.

    Google Scholar 

  • Andriessen, P.A.M., Banga, G., Boelrijk, N.A.I.M., Hebeda, E.H., Priem, H.N.A., Verdurmen, E.A.TH. &Verschure, R.H. (1979): Dating the Events of Metamorphism and Granitic Magmatism in the Alpine Oroaen of Naxos (Cyclades, Greece). - Contrib. Mineral. Petrol.,69, 215–225.

    Google Scholar 

  • Blake, M.C., Bonneau, M., Geessant, J., Kienast, J.R., Lepvrier, C., Maluski, H. &Papanikolaou, D. (1981): A geologic reconnaissance of the Cycladic blueschists belt, Greece. - Geol. Soc. Amer. Bull., Part I,92, 247–254.

    Google Scholar 

  • Davies, E.N. &Bastas, C. (1978): Petrology and geochemistry of the metamorphic system of Santorini. - In: Proc. International Congress „Thera and the Aegean World“, Doumas, Ch. ed.,I, 61–79, London.

  • Del Moro, A., Puxeddu, M., Radicati Di Bronzolo, F. &Villa, I.M. (1982): Rb-Sr and K-Ar ages on minerals at temperatures of 300°–400°C from deep wells in the Larderello geothermal field (Italy).- Contrib. Mineral. Petrol.,81, 340–349.

    Google Scholar 

  • Flisch, M. (1982): Potassium-argon analysis.-In: Numerical dating in stratigraphy, Odin, G.S. ed., Wiley, London.

    Google Scholar 

  • Henjes-Kunst, F., Altherr, R., Kreuzer, H. &Hansen, B.T. (1988): Disturbed U-Th-Pb systematics of young zircons and uranothorites: the case of the Miocene Aegean granitoids (Greece). - Chemical Geology (Isotope Geoscience Section),73, 125–145.

    Google Scholar 

  • Marakis, G. (1968): Remarcs on the age of sulfide mineralization in Cyclades area. - Ann. Geol. Pays Hellen.,19, 695–700.

    Google Scholar 

  • Mezger, K., Altherr, R., Okrusch, M., Henjes-Kunst, F. &Kreuzer, H. (1985): Genesis of acid/basic rock associations: a case study. The Kallithea intrusive complex, Samos, Greece. - Contrib. Mineral. Petrol.,90, 353–366.

    Google Scholar 

  • Papastamatiou, I. (1956): Sur l'âge des calcaires cristallins de l'île de Thera (Santorin). - Bull. Geol. Soc. Greece,3, 1, 104–113 (in Greek with French summary).

    Google Scholar 

  • Pearce, J., Harris, N.B.W. &Tindle, A.G. (1984): Trace element discrimination diagrams for the tectonic interpretation of granitic rocks. - J. Petrol.25, 4, 956–983.

    Google Scholar 

  • Puchelt, H., Murad, E. &Hubberten, H.W. (1977): Geochemical and petrological studies of lavas, pyroclastica and associated xenoliths from the Christiana islands, Aegean Sea. -N. Jb. Min. Abh.,131 (2), 150–155.

    Google Scholar 

  • Schliestedt, M.,Altherr, R. &Matthews, A. (1987): Evolution of the Cycladic Crystalline Complex: Petrology, Isotope Geochemistry and Geochronology. - In: Chemical Transport in Metasomatic Processes, Helgeson H.C. ed., Reidel Publishing Company, 389–428.

  • Skarpelis, N. &Liati, A. (1987): Granite intrusion, skarn formation and mineralization in the metamorphic basement of Thera, Cyclades, Greece. - 5th Meeting European Geological Societies, Dubrovnik, Abstr., p. 81.

  • — (1990): The prevolcanic basement of Thera at Athinios: Metamorphism, Plutonism and Mineralization. - Proc. of the Third International Congress “Thera and the Aegean World III”, Hardy, D.A. ed., The Thera Foundation, London,2, 172–182.

    Google Scholar 

  • Tataris, A. (1964): The Eocene in the semi-metamorphosed basement of Thera island. - Bull. Geol. Soc. Greece,6, 232–238 (in Greek with English summary).

    Google Scholar 

  • Villa, I.M. (1983):40Ar/39Ar dating of Adamello gabbros, Southern Alps. - Mem. Soc. Geol. Ital.,26, 309–318.

    Google Scholar 

  • White, A.J.R. &Chappell, B.W. (1977): Ultrametamorphism and granitoid genesis. - Tectonophysics,43, 7–22.

    Google Scholar 

  • Wijbrans, J.R. &McDougall, I. (1988): Metamorphic evolution of the Attico-Cycladic Metamorphic Belt on Naxos (Cyclades, Greece) utilizing40Ar/39Ar age spectrum measurements. J. Metam. Geol.,6, 571–594.

    Google Scholar 

Download references

Author information

Author notes

  1. Nikos Skarpelis & Konstantinos Kyriakopoulos

    Present address: Department of Geology, University of Athens, Panepistimioupoli, 157 84, Zografou, Athens

  2. Igor Villa

    Present address: Istituto di Geochronologia, Via Card. Maffi 36, 56100, Pisa

Authors and Affiliations

    Authors
    1. Nikos Skarpelis
      View author publications

      You can also search for this author in PubMed Google Scholar

    2. Konstantinos Kyriakopoulos
      View author publications

      You can also search for this author in PubMed Google Scholar

    3. Igor Villa
      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

    Skarpelis, N., Kyriakopoulos, K. & Villa, I. Occurrence and40Ar/39Ar dating of a granite in Thera (Santorini, Greece). Geol Rundsch 81, 729–735 (1992). https://doi.org/10.1007/BF01791388

    Download citation

    • Received:

    • Accepted:

    • Issue Date:

    • DOI: https://doi.org/10.1007/BF01791388

    Keywords

    Search

    Navigation