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pure and applied geophysics

, Volume 152, Issue 4, pp 747–757 | Cite as

Curie Point Depth of the Island of Crete (Greece)

  • G. N. Tsokas
  • R. O. Hansen
  • M. Fytikas

Abstract

—The aeromagnetic data of the island of Crete were inverted to produce Curie point estimates. The data were high-pass filtered to remove components arising from topography and magnetic core fields which were not adequately modeled by IGRF. The depth to the centroid, z 0 , of the deepest distribution of the magnetic dipoles, was obtained by computing a least-squares fit to the lowest-fre quency segment of the azimuthally averaged log power spectrum. The depth to the top of the deepest crustal block was computed as the depth, z t  , to the centroid of the second deepest distribution, using the second lowest-frequency segment of the spectrum. The depth to the bottom of the deepest dipoles, the inferred Curie point depth, is then z b = 2z 0z t  . The Curie depth estimates range between 24 and 28 km. This is in accordance with the depths inferred by extrapolating heat-flow values measured in boreholes.

Key words: Curie depth, log power spectrum, Crete. 

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Copyright information

© Birkhäuser Verlag Basel, 1998

Authors and Affiliations

  • G. N. Tsokas
    • 1
  • R. O. Hansen
    • 2
  • M. Fytikas
    • 3
  1. 1.Geophysical Laboratory, Aristotle University of Thessaloniki, GR 540 06, Thessaloniki, Greece. Tel.: 30 31 998507, Fax: 30 31 998528; E-mail: gtsokas@geo.auth.grGR
  2. 2.Pearson, deRidder and Johnson, Inc., 12640 W. Cedar Dr., Suite 100, Lakewood, Colorado 80228, USA. Tel.: 303 987 1114; E-mail: rohansen@prj.comUS
  3. 3.Department of Geology and Physical Geography, Aristotle University of Thessaloniki, GR 540 06, Thessaloniki, Greece. Tel.: 30 31 998475; E-mail: fytikas@geo.auth.grGR

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