Dear Mr. Bhowmick,

you are right that bog iron ore is no longer a feasible target for the exploitation of Fe. It was only done on the Jutland peninsula , Denmark, for a limited period of time and during wartimes in Germany. Iron ranks among the commodities where you do not face any shortage during the near future. Thus botanical extraction of Fe will certainly not be feasible in view of the large banded Fe formations. There is only one ore mineralization known to me which has been "harvested" in an economic way similar to what you are going to accomphlish with Fe. It is algal gold in rivulets and creeks. It is biological concentrated and it is replenished within men´s lifetime. The supergene organic accumulation only worked in areas where you encounter high background values of gold. You can compare the mechanism of gold concentration with your bog iron ores. Algal structures are still to be seen in the Au nuggets and prove the afore-mentioned ore-forming process.

Kind regards

H.G.Dill