THE MAGNETIC FABRIC RELATIONSHIP BETWEEN SEDIMENTARY AND BASEMENT NAPPES IN THE HIGH TATRA MOUNTAINS, N SLOVAKIA

In the High Tatra Mountains (N. Slovakia), the magnetic fabrics are deformational in origin in sedimentary rocks of the Krizna nappe, in sedimentary rocks covering the underlying crystalline complex, and in granitoids and metamorphic rocks of this complex. The patterns of the principal susceptibilities are similar in all these units; their most important feature is a girdle in magnetic foliation poles oriented NNW-SSE to N-S. In sedimentary formations the magnetic fabric pattern is compatible with that predicted by mathematical modelling to develop during a complex deformation comprising lateral shortening and simple shear, which is characteristic of nappe deformation. Consequently, the magnetic fabric in the High Tatra Mountains probably resulted from deformation associated with the formation and movement of the nappes, during which not only the sedimentary strata, but also the crystalline complex, were thrust over the North European platform.