Document Type

Article

Publication Date

2001

Keywords

Aegean, Inclination, Lesbos, Miocene, Palaeomagnetism.

Abstract

Palaeomagnetic results for 44 sites in 16-22 Ma volcanic rocks from Lesbos, NE Aegean, yield a mean pole at 81.8ºN, 178.1º E, K = 9.0, A95 = 7.6º. The mean direction for these sites (D =4.3º, I = 48.5º, k = 10.8, α 95 = 6.9º) is 5.9º +/- 6.1º shallower than the reference direction for Miocene Lesbos calculated from Besse & Courtillot (1991). Combining these new data with previous work yields a mean inclination that is 5.6º +/- 4.7º too shallow. Experimental problems, magnetic anisotropy, the magnetic terrain effect, geomagnetic anomalies, and problems with the reference path all seem unable to account for this observation. Shallow inclinations are a common feature of the Aegean region: 17 of 18 palaeomagnetic studies on Cenozoic igneous rocks have returned an inclination that is shallower than expected. Northward motion of the Aegean block by ~500 km with respect to northern Europe would account for this observation.

Publication Title

Geophysical Journal International

Volume

145

First Page

233

Last Page

245

Required Publisher's Statement

Oxford Journals, Oxford University Press

Geophys. J. Int. (2001) 145 (1):233-245.doi: 10.1111/j.1365-246X.2001.00376.x

Subjects - Topical (LCSH)

Paleomagnetism--Cenozoic; Anisotropy; Igneous rocks--Greece; Thermoremanent magnetization--Greece

Geographic Coverage

Lesbos (Greece : Municipality)

Genre/Form

articles

Type

Text

Language

English

Format

application/pdf

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Included in

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