Fabric analysis by magnetic methods can reveal a sedimentary fabric which may not otherwise be apparent. For example, a stress induced fabric or a fabric produced by a depositional current in the higher flow regime can be detected by magnetic methods. By the use of a high-sensitivity kappa bridge we determine and interpret sedimentary fabric from core samples or drilled side wall plugs. When combined with magnetic reorientation of the samples the direction of the depositional currents can be determined. |
The anisotropy ellipsoid. Kmax is the direction in which the sediment is most easily magnetised. Kmin is the direction in which the sediment is most difficult to magnetise. |