"Relationships between niobium grade and
rock units were used to constrain resource
extents (Figure 11). Current data was
integrated with historical data (Figure 10).
Historical data lacked information on
sections 5 and 6. The updated resource
estimation completed by our team allowed
for a more robust assessment of the D-Zone
niobium endowment (Table 1). The results
are comparable to historic estimates using a
cut-off grade of 0.30 % Nb 2 O 5.
Cut-Off Grade (% Nb 2 O 5 )
0.3
0.35
0.4
0.5
0.3
0.35
0.4
0.5
~0.3
~0.3
Volume (m 3 )
5,317,500
5,101,125
4,575,375
3,136,375
4,592,250
4,444,875
4,045,625
2,836,375
5,531,614
4,978,445
Tonnes of Ore (S.G. 2.85)
15,154,875
14,538,206
13,039,819
8,938,669
13,087,913
12,667,894
11,530,031
8,083,669
Figure 13. Proposed drillhole locations,
oblique view looking north. Drill hole EX5 is
300 m in length for scale
COST BENEFIT ANALYSIS
Figure 9. D-Zone plan view cross sections at 340 m
depth (a) Geological section (b) Contoured block
grade concentration.
RESOURCE ESTIMATION AND CLASSIFICATION
OKA-1 Standard
1
To bring the Nemegosenda Lake historic niobium deposit up to CIM and
NI 43-101 standards for reporting reserves, a preliminary design for
economic extraction through a strategic mine plan is required. Figure 12
shows the team’s preliminary design of an open pit mine. The
parameters listed below are based on estimates from industry and basic
rockmass parameters [5].
F
The objectives of this project are to:
• Design an advanced exploration program for niobium mineralization
in the D-Zone to gain confidence in geometry, extent, grade and
tonnage
• Evaluate economics of D-Zone niobium mineralization
• Conceptualize a preliminary mine-plan for mineral extraction"
News 
Market Data 
Discover 
