Separation of multicomponent NRM: combined use of difference and resultant magnetization vectors

For rock specimens carrying three superimposed remanence components with partially overlapping coercivity spectra, a modified form of the vector difference method proposed by Hoffman and Day (1978) can lead to greater precision in the estimate for the direction of the intermediate coercivity component. The modification is that the convergence point of great circles defined by differenceand resultant vectors is used to determine the direction of the intermediate component, rather than by using great circles defined only by difference vectors as in the Hoffman-Day technique.