Central Deposit

Resources

Central Deposit Resources

The following tables list the Measured, Indicated and Inferred Mineral Resources for the Central Deposit. Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability. There is no certainty that all or any part of Mineral Resources will be converted to Mineral Reserves. Inferred Mineral Resources are based on limited drilling which suggests the greatest uncertainty for a Mineral Resource estimate and that geological continuity is only implied. Additional drilling will be required to verify geological and mineralization continuity and there is no certainty that all of the Inferred Mineral Resources will be converted to Measured and Indicated Mineral Resources. Quantity and grades are rounded to reflect the fact that the estimate is an approximation.

Central Deposit LAG Domain Mineral Resources

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Measured
Cut-off Oxval ($US) Tons Zn % Ag oz/ton Mn %
500 44,000 1.7 12.5 13.9
400 153,000 1.3 10.1 11.5
300 536,000 1.1 7.3 9.6
200 1,498,000 0.8 5.5 7.5
100 3,796,000 0.5 4.0 5.0
50 6,821,000 0.3 3.3 3.3

Indicated

500 17,000 2.2 6.2 16.1
400 126,000 1.8 4.7 13.8
300 499,000 1.6 3.4 11.7
200 1,424,000 1.1 3.2 8.7
100 4,757,000 0.6 2.8 5.2
50 10,258,000 0.4 2.4 3.0

Measured & Indicated

500 61,000 1.8 10.7 14.5
400 280,000 1.5 7.7 12.6
300 1,035,000 1.3 5.5 10.6
200 2,922,000 1.0 4.4 8.1
100 8,553,000 0.6 3.4 5.1
50 17,079,000 0.3 2.8 3.1

Inferred

500 0 0.0 0.0 0.0
400 0 0.0 0.0 0.0
300 6,000 1.0 4.4 11.8
200 20,000 0.9 3.0 9.1
100 124,000 0.5 2.9 4.0
50 923,000 0.2 2.2 1.4

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Central Deposit MOX Domain Mineral Resources

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Measured

Cut-off Oxval ($US) Tons Zn % Ag oz/ton Mn %
500 2,340,000 2.9 7.0 16.3
400 5,874,000 2.6 5.9 14.3
300 10,787,000 2.5 5.1 12.2
200 16,016,000 2.2 4.4 10.5
100 18,462,000 2.0 4.1 9.8
50 18,509,000 2.0 4.1 9.8
Indicated
500 1,672,000 4.9 2.9 17.3
400 9,447,000 3.7 2.4 14.7
300 25,505,000 3.1 2.2 12.4
200 42,834,000 2.7 1.9 10.6
100 49,524,000 2.5 1.8 9.8
50 49,895,000 2.5 1.8 9.8
Measured & Indicated
500 4,012,000 3.7 5.3 16.7
400 15,321,000 3.3 3.8 14.6
300 36,292,000 2.9 3.0 12.4
200 58,851,000 2.6 2.6 10.6
100 67,986,000 2.4 2.4 9.8
50 68,405,000 2.3 2.4 9.8
Inferred
500 12,000 6.4 13.7 9.2
400 56,000 7.4 5.5 9.7
300 133,000 5.6 3.9 9.4
200 267,000 4.3 3.0 8.1
100 296,000 4.0 2.8 7.8
50 296,000 4.0 2.8 7.8

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Mineral Resources are reported as of 29 March 2017.
Stated at a cut-off grade of $100/ton Oxval based on prices, recovery and costs as follows:
Prices of $1.00/lb for zinc, $0.95/lb ,$20.00/oz for silver and $1.22/lb for manganese
Average processing recovery factors of 55% for zinc, 86% for manganese, and 72% for silver
Total operating costs (mining and processing) are estimated to be on the order of $100/ton.
Oxval calculation is discussed above

Qualified Person
The QP for the Mineral Resource estimate is G. Z. Mosher, P.Geo, an associate of AMC. The Mineral Resource estimate has been prepared under the guidelines of National Instrument 43-101 (“NI 43-101”) for reporting of Mineral Resources.

The results of the metallurgical tests have been reviewed, verified and compiled by Qinghua Jin, MSc., P.E., Senior Process Engineer for SGS North America Inc., a qualified person as defined by National Instrument 43-101 (NI 43-101). Mr. Jin has more than 26 years of mineral processing experience and is a member of the Association of Arizona State Board of Technical Registration (License #53463), and a registered member of the Society for Mining, Metallurgy & Exploration (04138753).

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