Seabed source. Iso. Basalt N C I J 2 10 1 0 3 0 0 0 0 0 0 0 0 1500 0 0 0 1 0 5000 5000 2000 0.01 0.02 2.4 0 5000 0 5000 51 25 1400 1E8 -1 1 1 0 5000 20 500 20 80 12 10 0 5000 12 1000 80 140 3