In the Hikurangi subduction zone (NE New Zealand), the Pacific Plate is subducted obliquely beneath the Australian Plate, with the sheared sediments of the Pacific Plate forming a broad accretionary wedge on the Australian Plate. During IODP Expedition 375, sediments from a major splay fault were drilled and characterised using anisotropy of magnetic susceptibility (AMS) measurements. To better understand these results, we measure the textures of the minerals in the samples and use these to model the AMS and compare them with the measured results. This contributes to a better understanding of the AMS signal in sediments and tectonics in accretionary wedges. The project is a collaboration with Dr Annika Greve, Utrecht University.
