Physics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29g..31f&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 7, pp. 31-1, CiteID 1127, DOI 10.1029/2001GL014367
Physics
8
Geomagnetism And Paleomagnetism: Magnetic Fabrics And Anisotropy, Geomagnetism And Paleomagnetism: General Or Miscellaneous, Geomagnetism And Paleomagnetism: Magnetic Mineralogy And Petrology, Geomagnetism And Paleomagnetism: Rock And Mineral Magnetism
Scientific paper
Multi-domain magnetites display a normal anisotropy of magnetic susceptibility (AMS) fabric where grain shape axes coincide with AMS axes. By contrast, single-domain magnetite has an inverse magnetic fabric where magnetic axes are interchanged. The mixing of normal and inverse magnetic fabrics results in intermediate fabrics. Theoretical models for intermediate fabrics consider all combinations of normal and inverse fabrics. The minimum amount of inverse component required for intermediate fabrics to form is about 20% in the case of prolate normal (T = -0.50) and prolate inverse (T = -0.42) components. Such a small amount of inverse component may not be noticed. The anisotropy resulting from intermediate fabrics is lower than that of the normal or inverse contribution to AMS. This suggests that whenever intermediate fabrics occur neither the shape factor nor the degree of anisotropy relate to strain in a simple way.
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