1. Federal Institute for Geosciences and Natural Resources (BGR), Stilleweg 2, D-30655 Hannover, Germany, Technical University of Berlin (TUB)—Institute of Applied Geosciences, Ackerstraβe 76, D-13355 Berlin, Germany, and State Authority of Mining, Energy and Geology (LBEG), Stilleweg 2, D-30655 Hannover, Germany