Anisotropy of magnetic susceptibility variations in a single icelandic columnar basalt

Details Anisotropy of magnetic susceptibility variations in a single icelandic columnar basalt Anisotropy of magnetic susceptibility variations in a single icelandic columnar basalt

May 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977e%26psl..35..116e&link_type=abstract

Earth and Planetary Science Letters, Volume 35, Issue 1, p. 116-122.

Computer Science

4

Scientific paper

Measurements of the anosotropy of magnetic susceptibility in 34 specimens drilled from a single Icelandic columnar basalt segment reveal a preferred, long-axis alignment of magnetic minerals normal to the long axis of the column and well grouped. Maximum elongation of these minerals occurs in regions which crystallized late, as independently indicated by relative samarium concentrations. We propose that the variations in magnetic mineral elongation are controlled by variations in thermal stress in the cooling column, before complete solidification. An upper limit of 75-100 bars is suggested for these stresses.

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