Bulletin of Volcanology

, Volume 68, Issue 6, pp 567–591

Eruptive history and petrologic evolution of the Albano multiple maar (Alban Hills, Central Italy)

  • Carmela Freda
  • Mario Gaeta
  • Daniel B. Karner
  • Fabrizio Marra
  • Paul R. Renne
  • Jacopo Taddeucci
  • Piergiorgio Scarlato
  • John N. Christensen
  • Luigi Dallai
Research Article

Abstract

A comprehensive volcanological study of the Albano multiple maar (Alban Hills, Italy) using (i) 40Ar/39Ar geochronology of the most complete stratigraphic section and other proximal and distal outcrops and (ii) petrographic observations, phase analyses of major and trace elements, and Sr and O isotopic analyses of the pyroclastic deposits shows that volcanic activity at Albano was strongly discontinuous, with a first eruptive cycle at 69±1 ka producing at least two eruptions, and a second cycle with two peaks at 39±1 and 36±1 ka producing at least four eruptions. Contrary to previous studies, we did not find evidence of magmatic or hydromagmatic eruptions younger than 36±1 ka. The activity of Albano was fed by a new batch of primary magma compositionally different from that of the older activity of the Alban Hills; moreover, the REE and 87Sr/86Sr data indicate that the Albano magma originated from an enriched metasomatized mantle. According to the modeled liquid line of descent, this magma differentiated under the influence of magma/limestone wall rock interaction. Our detailed eruptive and petrologic reconstruction of the Albano Maar evolution substantiates the dormant state of the Alban Hills Volcanic District.

Keywords

Eruptive cycles Geochronology Alban Hills Maar Hydromagmatic Ultrapotassic Decarbonation 

Supplementary material

Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  • Carmela Freda
    • 1
  • Mario Gaeta
    • 2
  • Daniel B. Karner
    • 3
  • Fabrizio Marra
    • 1
  • Paul R. Renne
    • 4
    • 5
  • Jacopo Taddeucci
    • 1
  • Piergiorgio Scarlato
    • 1
  • John N. Christensen
    • 6
  • Luigi Dallai
    • 7
  1. 1.Istituto Nazionale di Geofisica e VulcanologiaSezione di Sismologia e TettonofisicaRomaItaly
  2. 2.Dipartimento di Scienze della TerraUniversità degli Studi “La Sapienza”RomaItaly
  3. 3.Dept of GeologySonoma State UniversityRohnert ParkUSA
  4. 4.Berkeley Geochronology CenterBerkeleyUSA
  5. 5.Dept of Earth and Planetary ScienceUniversity of CaliforniaBerkeleyUSA
  6. 6.Lawrence Berkeley National LaboratoryBerkeleyUSA
  7. 7.CNR-Istituto di Geologia Ambientale e GeoingegneriaRomeItaly

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