AMS-detection of inverse fabrics without AARM, in ophiolite dikes

Inverse fabric contributions from single-domain (SD) magnetite complicate interpretation of magmatic flow from anisotropy of magnetic susceptibility (AMS) in the S. Troodos ophiolite. dike swarm. Flow directions and magma chamber dimensions may only be inferred correctly if magnetic fabrics correspond to the orientation distribution (OD) of minerals. Magnetite shape-fabrics were isolated by anisotropy of anhysteretic remanence (AARM) but AMS ambiguously merges magnetite and silicate fabrics. However, with the retrospective benefit of AARM, in this area, we recommend avoiding SD complications by excluding magnetite-rich samples for which the bulk low-field susceptibility > 27,500 mu SI. Magma-flow was steeply upwards to the SW proximal to an axial magma chamber.