On the detection of weak strain parallel to the bedding by magnetic anisotropy: A mathematical model study

Hrouda, František; Hrušková, Lenka

doi:10.1007/bf02316953

Cited by 15 publications

(1 citation statement)

References 14 publications

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“…What happens to the magnetic fabric during postdepositional deformation is more complex. Initial theoretical work on the relationship between magnetic fabrics and actual grain fabrics with respect to strain was done by Owens (1974), Hrouda and Hruskova (1990), and Housen et al (1993). Most studies concerning strain in relation to AMS fabric have dealt with tectonic scales (e.g., Kanamatsu et al, 2001;Pares et al, 1999) and at least weakly metamorphosed rocks.…”

Section: Introductionmentioning

confidence: 99%

Characterization of soft-sediment deformation: Detection of cryptoslumps using magnetic methods

Schwehr

Tauxe

2003

Geol

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Many workers have explored anisotropy of magnetic susceptibility (AMS) of sediments as an indicator of deformation. Several studies have used deflection of the eigenvector associated with the minimum in susceptibility, V 3 , as a criterion for deformation. We examine the AMS record of a well-exposed slump and find that although demonstrable deformation can occur without deflecting the V 3 directions, an oblate AMS fabric is transformed into a triaxial fabric during initial deformation. Transformation of the fabric from oblate to triaxial appears to be highly correlated with an increase in natural remanent magnetization scatter, whereas deflection of the V 3 axes is not. We suggest that subtle soft-sediment deformation can be detected by using AMS fabric.

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