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Silver Standard Resources (SSRI) Adds Mineral Resources at the Marigold Mine

December 12, 2014 7:28 AM EST
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Silver Standard Resources (NASDAQ: SSRI) announced he addition of Mineral Resources at the Marigold mine ("Marigold") located in Humboldt County, Nevada. These Mineral Resources lie within the limits of Marigold's existing plan of operations at the southern end of the 8 South pit and are comprised of oxidized gold mineralization, leachable using the current run-of-mine heap leach process. The 8 South pit extension currently contains Indicated Mineral Resources of 2.13 million tonnes at a grade of 1.20 grams per tonne gold and Inferred Mineral Resources of 1.70 million tonnes at a grade of 1.41 grams per tonne gold. The gold mineralization is open to the south, east and west. The grade of these Mineral Resources compares favourably to the Marigold mine average reserve grade of 0.51 grams per tonne gold.

"Exploration efforts at Marigold continue to deliver positive results," said John Smith, President and CEO. "Our goal was to confirm our understanding of the geology and to identify extensions to existing pits for higher margin ounces. The results of our 2014 drill program have exceeded our expectations due to the gold grade encountered and the proximity to the historical 8 South pit."

Table 1: 8 South Pit Extension Mineral Resources Estimate (as at November 30, 2014)

Category

Tonnes

Gold Grade

Contained Gold

(Mt)

(g/t)

(oz)

Measured

-

-

-

Indicated

2.13

1.20

82,000

Inferred

1.70

1.41

75,000

Notes:

1.

James N. Carver, Registered SME Member (# 509390), is the Qualified Person for the Mineral Resources estimate. For a complete description of the key assumptions, parameters and methods used to estimate the Mineral Reserves and Mineral Resources at Marigold, please refer to the technical report dated November 19, 2014 and entitled "NI 43-101 Technical Report on the Marigold Mine, Humboldt County, Nevada", which is available under our profile on the SEDAR website at www.sedar.com or on our website at www.silverstandard.com.

2.

The Mineral Resources estimate has been classified in accordance with Canadian Institute of Mining, Metallurgy and Petroleum (CIM, 2010) definition standards.

3.

Reported Mineral Resources are estimated below the as-mined surface as at November 30, 2014 and are inclusive of Mineral Reserves.

4.

Gold values have been estimated using ordinary kriging.

5.

Outlier restriction on gold values above 8.00 g/t has been used for the Mineral Resources estimate.

6.

Densities for different lithological units have been calculated based on detailed test work carried out by Silver Standard and corresponds to the historical mine production.

7.

The Marigold drillhole database including collar survey, assay, lithology, oxidation and densities used for this Mineral Resources estimate has been verified by James N. Carver, SME Registered Member, by conducting detailed verification checks, including Quality Assurance/Quality Control of location, geological, density and assay data.

8.

Mineral Resources include all mineralized material that has the potential for economic recovery of gold from an open pit supply to a run-of-mine heap leach operation.

9.

The Mineral Resources estimate has been calculated based on an optimized pit at a cut-off grade of a payable gold grade of 0.065 g/t (gold assay factored for recovery, royalty and net proceeds per mineral resource block) with a gold price assumption of US$1,500 an ounce.

10.

The cost, recovery and design parameters considered by optimization calculations for this Mineral Resources estimate are considered appropriate based on the current mine production.

11.

The reported Indicated Mineral Resources are regarded as appropriate for medium to long term production open pit planning and mine scheduling on a quarterly basis.

12.

Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability. While the classification categories of Mineral Resources used in this news release are recognized and required under Canadian regulations, the U.S. Securities and Exchange Commission ("SEC") does not recognize them and U.S. companies are generally not permitted to disclose resources in documents they file with the SEC.

13.

There are no known legal, political or environmental risks that could materially affect the potential development of the Mineral Resources at Marigold.

14.

Tonnage and grade measurements are in metric units. Contained gold ounces are reported as millions of troy ounces (Moz.).

15.

Only oxidized gold mineralization, amenable to Marigold's existing recovery process, is considered for these estimates.

16.

Figures may not total exactly due to rounding.

The Mineral Resources are located along the southern edge of the previously mined 8 South pit. The 8 South pit produced 530,000 ounces of gold at a grade of 1.51 grams per tonne and supported a milling operation between 1987 and 1994. The gold distribution at the 8 South area is controlled by the Sear Fault, a north-south striking high-angle fault, which extends south of the historic mining area and had not been fully drill-tested. The recently completed exploration work demonstrates the lateral continuation and splaying of the Sear Fault with mineralization now open to the south, east and west. Selected results from the 2014 drill program that illustrate higher-grade gold intercepts have been included in Figure 1 and Table 2.

Next steps

Based on these positive results, the exploration program on the 8 South pit area has been extended with an additional 2,600 meters, in 10 drill holes, to be completed by year-end 2014. It is expected that these drill results and the additional Mineral Resources will be included within the annual 2014 Mineral Resources and Mineral Reserves statement to be published in the first quarter of 2015. The Marigold mine has begun an evaluation to determine the readiness of these Mineral Resources for mining.

Qualified Person

The scientific and technical data contained in this news release has been reviewed and approved by James N. Carver, SME Registered Member (#509390), a Qualified Person under National Instrument 43-101 – Standards of Disclosure for Mineral Projects and our Chief Geologist at the Marigold mine.

To receive Silver Standard's news releases by e-mail, please register using the Silver Standard website at www.silverstandard.com.

Figure 1. Drill Hole Location Plan Map for Marigold Exploration Drilling

Notes to Figure 1:

1.

Drill hole results from the 8 South pit area as at November 30, 2014.

2.

8 South mined pit has been backfilled.

3.

The new Mineral Resource outline has been calculated based on an optimized pit at a cut-off grade of a payable gold grade of 0.065 g/t (gold assay factored for recovery, royalty and net proceeds per mineral resource block) with a gold price assumption of US$1,500 an ounce.

4.

All values are presented in metric units.

Table 2. Selected Drill Results from Marigold Exploration Drilling

Hole ID

From

(meters)

To

(meters)

Length

(meters)

Gold Grade

(gpt)

MRA5971

146.3

158.5

12.2

0.90

MRA5972

129.5

182.9

53.3

2.35

Including

143.3

158.5

15.2

7.40

MRA5975

80.8

94.5

13.7

0.65

MRA5990

128.0

141.8

13.7

0.57

MRA5991

158.5

230.1

71.6

2.35

Including

199.6

216.4

16.8

7.95

MRA6009

222.6

286.6

64.0

1.14

Including

233.2

251.5

18.3

3.47

MR6010

158.5

196.6

38.1

1.18

Including

160.1

173.8

13.7

2.65

MRA6013

195.1

277.4

82.3

0.77

Including

230.1

240.8

10.7

2.15

MRA6014

149.4

187.5

38.1

0.64

Including

170.7

175.3

4.6

2.35

MR6015

147.9

256.1

108.2

2.15

Including

184.5

208.8

24.4

7.76

MR6017

80.8

132.6

51.8

0.58

Including

80.8

86.9

6.1

2.93

Notes:

1.

Drill hole results from the 8 South pit area as at November 30, 2014.

2.

Length values refer to length of down hole intercept.

3.

Drill holes selected on basis of gold grade greater than 0.50g/t over mineralized intervals.

4.

Drill holes MRA5972 and MRA5991 were previously reported in our news release dated October 14, 2014.

5.

All values are presented in metric units.



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