The synorogenic Palmental complex (central Damara Belt, Nambia) consists of ca. 545Ma old quartz diorites and rare granodiorites and ca. 520Ma-old leucogranites, representing one of the earliest and most primitive phase of crustal plutonism predating the main high-T regional metamorphism. Most quartz diorites and one granodiorite evolved through multistage, polybar...