This is what happened to the Rincon Salar deposit, page-16

I researched the Lead & Zinc and found this announcement:

31 March 2015
Bulman Lead and Zinc Project (“Bulman”), Northern Territory of Australia The Bulman project is located near the Bulman Aboriginal community within Arnhem Land, approximately 320km north east of Katherine (refer to Figure 1 below). This project consists of two granted exploration licences (EL 23814 and 25931) and two granted mineral leases (MLN 726 and 727). Right: Calculated susceptibility voxel model of the magnetic anomalies at the Cojin District. Admiralty Resources NL Activities Report for the quarter ended 31 March 2015 Page 6 The project is an exploration play; targets have been defined and two small drilling programmes have been completed. Prospects for eventual delineation of resources of lead - zinc are considered reasonably good but the geological environment is poorly explored. Following completion of airborne and ground electromagnetic surveys in 2011-2012, a small drilling programme was initiated to test geophysical and geological targets (see previous Admiralty Quarterly Reports). Drill samples at the Dingo Argentus prospect, reported widespread zinc anomalism, highlighting the prospectivity of this area for future exploration. However, no resource target worthy of exploration has been identified. Admiralty has decided not to invest any further funds in this project due to the poor returns on past exploration expenditure. The company will allow its current exploration licences and mineral leases to expire and will not renew them. No activity took place during the quarter.