Geertje W. ter Maat¹, Suzanne A McEnroe¹, Nathan S Church² and Hirokuni Oda³, (1)Norwegian University of Science and Technology, Department of Geoscience and Petroleum, Trondheim, Norway, (2)NTNU, Department of Geoscience and Petroleum, Trondheim, Norway, (3)National Institute of Advanced Industrial Science and Technology (AIST), Geological Survey of Japan, Tsukuba, Japan