En sammanställning av norra Skånes prekambriska berggrund

Sammanfattning: This literature study aims to summarize the Precambrian bedrock and its geological development in northern Scania. The study is based on previously published material, primarily three of SGU’s bedrock maps: Af 127, 155 and 181. These show the bedrock in the area northeast, southwest and northwest of Kristianstad. In order to place this bedrock in a broader context, other publications dealing with southern Sweden’s Precambrian bedrock and its development have also been studied. The bedrock in northern Scania is very varied. The eastern part of the map area belongs to a significant geological boundary zone, the traditionally called Protogine zone. The zone is characterized by intrusions of dolerite and syenite. The bedrock west of the zone is dominated by strongly deformed, more or less migmatic gneisses. The bedrock east of the zone has not undergone such high-grade metamorphism and penetrative deformation. The Precambrian bedrock around Kristianstad was formed in several stages, where the latest metamorphism and ductile deformation took place around 980-920 million years ago during the final phase of a large mountain building event, the Sveconorwegian orogeny. At that time, Scandinavia’s Precambrian bedrock was a part of the former supercontinent Rodinia.