Neutron Texture Investigations on Natural Mt. Isa Chalcopyrite Ore–Part I: Preferred Orientation of one and the Same Chalcopyrite Sample Before and After Experimental Deformation

Natural chalcopyrite samples from Mt. Isa, Australia were axially shortened with a constant strain rate of 3-10 -5 sec-, at a constant confining pressure of 300 (400) MPa and at different temperatures. Neutron diffraction texture analyses were carried out before and after experimental deformation on one and the same sample. The preferred orientation of the experimentally undeformed samples consists of three main orientation components, which become weaker with deformation at temperatures up to 200C. One or two new components develop with the c-axes perpendicular to the principal strain direction. At a deformation temperature of 300C two very different new components develop, the original components are completely dissolved.