as far as i remember - palau never had any mining modifier applied - so since it was not marked a "mining area" - it might simply be empty atm. - i sometimes wondered about miners that departed from fp11 empty ( hegemon ) ... just to return filled up only like 10 min later. - cause from waht i know... it would have taken around 30 min+ to fill up 2.7k cargo there.
but then - maybe it was adjusted at some time...
the point is...
corsairs are no miners, zoners are no miners, bhg are no miners, nomads are no miners... and no mining cooperation goes to such a remote system like delta ( well - they are not supposed to anyway ) - so... it wasn t a mining field.