Simplistic ...... no surely not!Optimistic? no surely not? Havent you forgotten to take it down to say 500 metres depth ....ie 250,000 x 150 m thick x 500 m depth by 2.5 SG...Whats 93.75 million tonnes x 500.00 (ok round it to 500 dont want to get too ahead of ourselves)..
So no ....by your reasoning your being pesimistic lol
Gee thats already nearly 50 billion tonnes... how big is olympic dam??
Have i missed anything.. hope my maths isnt leading anyone astray.
xx