1) on-site surface olivine basalt quantity

  
$S=\frac{W*T}{C}$




where W = total RMT 61 and 65 weight (kg) = 23.43 kg


T = total MF habitation area (ha) = 65.84 ha


C = total collected MF habitation area (ha) = 0.97 ha

Total on-site surface weight of RMT 61 and 65 is therefore estimated to be 1590 kg, or approximately 1.6 metric tons.