2009:21 The geological history of the Baltic Sea a review of the literature and investigation tools

The bedrock in Sweden mainly comprises Proterozoic magmatic and metamorphic rocks older than a billion or one and a half billion years with few easily distinguished testimonies for the younger history. For construction of a geological repository for deposition of nuclear waste it is important to understand the late, brittle, geological events to be able to estimate its influence and consequences for the repository.

The purpose of the current project is to compile published data related to the geological history of the Baltic Basin. The intention of the study is to contribute to the understanding and characterization of earlier and on-going and bedrock deformation in coastal areas outside Forsmark and Laxemar where the Swedish Nuclear Waste Management Co (SKB) recently has finished site investigations for a repository for spent nuclear fuel. Of special interest are structures with evident indications of late bedrock movements where also future movements cannot be excluded.