peak phosphorous, page-4

Assuming Phosphorus is consumed at similar rates to now at around 100+ MT of Rock phosphate world wide per year, Wonarah has an estimated 2 Bil Tonnes of Phosphate ore. So This one spot has roughly 10-20 years of World supply at varying costs of extraction. I would suspect that if Wonarah has that amount, there are other areas in the NT with similar.

BON is looking for Phosphate under the ocean in Namibia and extracting with scoops. That is unlikely to be the only ocean deposit. It is able to be extracted feasibly with current technology so based on the sample size of 2 companies (not statistically significant but interesting) then Phosphate is not at peak currently, its just we haven't looked hard enough.