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Canada,Mexico : Sierra metals announces filing of NI 43-101 technical report on the Cusi Mine in Mexico.

Sierra Metals Inc. ("Sierra Metals" or "the Company") has filed a technical report prepared in accordance with National Instrument 43-101 ("NI 43-101") on the Cusi Mine (the "Report"). The Report supports the disclosure made by the Company in its news releases dated December 29, 2017 entitled "Sierra Metals Significantly Increases Mineral Resource Estimate for Cusi Mine, Mexico." There are no material differences in the mineral resources contained in the Report from those disclosed in the December 29, 2017 news release.

The Report included mineral resources for the Cusi Mine with:

Total Measured and Indicated Resources increased 129% to 4,557,000 tonnes from 1,990,000 tonnes previously reported, and Total Inferred Resources increased 36% to 1,633,000 tonnes from 1,200,000 tonnes previously reported

Total Measured Mineral Resources for Cusi are 362,000 tonnes averaging 225g/t silver, 0.55% lead, 0.68% zinc, 0.13 g/t gold for a total 268 g/t AgEq

Total Indicated Mineral Resources for Cusi are 4,195,000 tonnes averaging 217 g/t silver, 0.64% lead, 0.66% zinc, 0.21 g/t gold and 267 g/t AgEq

Total Inferred Mineral Resources for Cusi are 1,633,000 tonnes averaging 158 g/t silver, 0.54% lead, 0.84% zinc, 0.16 g/t gold and 207 g/t AgEq

The updated Resource Estimate varies from the previous 2017 Technical Report due to a variety of factors, including the use of silver equivalent cut-off grade and depletion by production since the previous Report was completed

The updated Resource Estimate has incorporated new exploration drilling, sampling, and underground mapping information into the geologic interpretation and grade estimations providing more refined resource models in the areas of San Nicolas and Promontorio

The Report dated February 9, 2018 with an effective date of August 31, 2017 is entitled "NI 43-101 Technical Report on Resources Cusi Mine Mexico", and was prepared by independent SRK Consulting (U.S.), Inc.

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Publication:Mena Report
Geographic Code:1MEX
Date:Feb 19, 2018
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