The initial drilling at Apatita was primarily planned to define the width of mineralized phosphate within the Areado group (sequence of flat lying sediments which unconformably overlie the potash rock unit).
Alto da Serra and Nau de Guerra Prospects
| Hole ID |
Prospect |
From |
To |
Width |
P2O5
1.5% cut off |
| AP-MA-02 |
Alto da Serra |
34m |
52m |
18m |
3.00% |
| including |
Alto da Serra |
35m |
40m |
5m |
6.09% |
| including |
Alto da Serra |
37m |
39m |
2m |
9.49% |
| AP-MA-05 |
Nau de Guerra |
4m |
26m |
22m |
2.64% |
| including |
Nau de Guerra |
10m |
26m |
16m |
3.00% |
| and |
Nau de Guerra |
35m |
36m |
1m |
8.43% |
| AP-MA-06 |
Nau de Guerra |
83m |
90m |
7m |
3.88% |
| including |
Nau de Guerra |
87m |
90m |
3m |
6.35% |
** The drillholes were not sampled from surface.
Alto da Serra prospect surface mapping and grab sampling have identified a mineralized surface expression of 4.5km2 and the 48 surface grab samples taken in this prospect averaged 8.2% P2O5. AP-MA-02 drill hole completed in this prospect highlights high grade potential (2m at 9.49% P2O5) and low grade bulk tonnage potential (18m at 3.00% P2O5).
Nau de Guerra prospect surface mapping and grab sampling have identified a mineralized surface expression of 4.8km2 and the 64 surface grab samples taken in this prospect averaged 6.45% P2O5. Drill holes completed have intercepted high grade sedimentary units with drill hole AP-MA-06 returning 7m at 3.88% P2O5 including 3m at 6.35% and drill hole AP-MA-05 returning 16m at 3% P2O5 and 1m at 8.43%. These two holes are located approximately 2km apart in flat lying sedimentary beds.
All mineralized phosphate identified to date has been from the mapping of the sides and tops of the 50m to 200m high hills. These hills which represent the sedimentary rocks of the Areado group will present minimal stripping ratio from an open pit mining perspective. The Areado sedimentary package is also a very soft and permeable package of rocks that will be amenable to “free dig” and/or minimal blasting along with potential in situ leaching methods of mining.