Comparing intrarift and border fault structure in the Malawi Rift: Implications for normal fault growth

Early stages of normal fault growth are seldom described using field observations active faults. Here we first estimate the displacements border and intrarift faults in Zomba Graben low extension (< 10 %) Malawi Rift, then quantify micro-to macroscale damage mineralisation associated with their surface exposures. The 22 km long Mlunguzi 39 Chingale Step have zones 4–52 m wide. In contrast, zone 51 is 32–118 Calcite clay alteration limited to cores, extent intensity mineral greater on compared Relative global compilations, lengthened quickly while developing narrow zones, given displacement. minor these long, low-displacement may reflect influence lithology, negligible healing, and/or activation pre-existing weaknesses.