Bulletin Volcanologique

, Volume 41, Issue 2, pp 81–96 | Cite as

Petrology of filicudi, aeolian archipelago

  • L. Villari
  • S. Nathan
Article

Abstract

Volcanic rocks on the island of Filicudi are typical of the cale-alkaline association of the Aeolian archipelago, and range in composition from basalt to high-K andesite. All specimens contain abundant phenocrystic plagioclase (cores of An82–97, rims becoming progressively more sodic with increasing Differentiation Index), clinopyroxene, and magnetite; the most basic samples contain olivine, which is replaced by orthopyroxene at around D.I.=44. SiO2 generally increases with time, and this in conjunction with the continuity in mineralogy suggests that the lavas are the differentiation products of a single batch of magma. Least-squares mixing calculations are consistent with a shallow fractional model, as is the variation in trace element abundances.

Keywords

Instrumental Neutron Activation Analysis Trace Element Data Trace Element Abundance Ferromagnesian Mineral Calcic Core 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Intern. Association of Volcanology and Chemistry of the Earth’s Interior 1978

Authors and Affiliations

  • L. Villari
    • 1
  • S. Nathan
    • 2
  1. 1.CNR — Istituto Internationale di VulcanologiaCatamaItaly
  2. 2.N.Z. Geological Surveyc/o University of CanterburyChristchurchNew Zealand

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