Coeur Extends High-Grade Mineralization at Rochester

February 29, 2016

Responsive image

CHICAGO–(BUSINESS WIRE)–Coeur Mining, Inc. (“Coeur” or the “Company”) (NYSE:CDE) announced the extension at depth of high-grade silver-gold mineralization at the Rochester Mine in Northwest Nevada at the East Rochester zone. Favorable results include 179.1 feet of 4.75 oz/t silver and 0.009 oz/t gold, or 5.31 oz/ton silver equivalent.

Drilling began in 2014 with the first reverse circulation drill hole encountering 1,300 feet of 1.11 oz/t silver and 0.003 oz/t gold, or 1.31 oz/ton silver equivalent, over twice the current average silver reserve grade of 0.53 oz/t silver and equal to the current average gold reserve grade of 0.003 oz/t. In late 2014, a core hole was drilled to twin the first reverse circulation hole, confirming the results and indicating high-grade silver-mineralized structures occur in the district.

The East Rochester zone is located approximately 1,000 feet east of mining in the existing Rochester open pit and close to existing infrastructure. Several successful holes were also drilled in the eastern side of the Rochester pit to further define mineralization between current mining activity and the new East Rochester zone with results supporting possible expansion towards East Rochester. In 2016, infill and expansion drilling is planned to better define the continuity of mineralization between current mining activities and the new East Rochester zone, which has the potential to become an additional source of nearby, high-grade mineralization, assuming continued drilling success, resource modeling, and applied mine engineering.

Drilling Highlights1:

  • Reverse Circulation Hole ER14-001:
    • 1,300 feet averaging 1.11 oz/t of silver and 0.003 oz/t of gold, including 490 feet averaging 1.95 oz/t of silver and 0.005 oz/t of gold
  • Twin Core Hole ERC14-002:
    • 118.6 feet averaging 2.78 oz/t of silver and 0.009 oz/t of gold
    • 179.1 feet averaging 4.75 oz/t silver and 0.009 oz/t gold, including 4.1 feet averaging 55.80 oz/t of silver and 0.081 oz/t of gold
    • 17.0 feet averaging 3.71 oz/t silver and 0.009 oz/t gold

“The East Rochester extension further demonstrates our focus on adding higher-grade, higher-margin ounces to our mine plans,” said Hans Rasmussen, Coeur’s Senior Vice President of Exploration. “The Rochester team identified this target in mid-2014, and it met the criteria for additional funding through our success-based exploration program. As a result, $1.6 million of additional funding was infused into the Rochester drill program and led to drilling some of the highest grades seen to date from the Coeur Rochester exploration program, including silver equivalent grades up to 5.31 oz/t, over 7 times the average reserve grade. These higher grades could potentially drive lower costs and positively impact future cash flow. Further drilling is planned in 2016, and we will be evaluating the economics of the deposit for potential inclusion in an expanded mine plan.”

Exploration at Rochester is expected to total $3.4 million in 2016, including $1.3 million (expensed) and $2.1 million (capitalized).

 
Highlights from Drill Results at Rochester, East: July – November 2014
Mineralized Interval (feet)
Hole   From   To   Thickness     Silver Assays (Oz/short ton)     Gold Assays (Oz/short ton)
ER14-001   740   1230   490     1.95     0.005
ER14-002 170 330 160 1.60 0.005
ER14-010 120 360 240 2.11 0.083
ER14-015 970 980 10 6.69 0.010
ER14-022 250 320 70 1.49 0.007
ER14-028 580 600 20 1.83 0.013
ER14-030 560 630 70 1.66 0.002
ER14-031 670 770 100 1.63 0.019
ER14-032 120 440 320 2.02 0.014
ER14-032 490 560 70 2.34 0.003

Core Hole

ERC14-002 310 429 119 2.78 0.009
ERC14-002 764 903 139 5.78 0.008
ERC14-002   1068   1085   17     3.71     0.009
Notes:  
1. Drill intercepts from reverse circulation drill samples were prepared and analyzed by Skyline Labs in Sparks Nevada.
2. Core hole sample intercepts were split on site, and were prepared and analyzed by Skyline Labs in Sparks Nevada.
3. Samples were analyzed by 30 gram fire assay-AA finish with palladium inquart for silver and gold. Gold over 0.5 ppm and silver over 50 ppm are reassayed using 30 gram fire assay-gravimetric finish.
4. Mineralized interval composited assays calculated using 0.34 ounces/ton Ag cutoff grade.
5. Maximum of 10 feet of internal dilution (less than cutoff grade) permitted in compositing.
     
1. Full drill results in the Appendix.
 
Rochester Mineral Reserves and Resources
          Grade (oz/t)     Ounces
    Short Tons     Silver     Gold     Silver     Gold
Proven Reserves   96,520,000     0.53     0.003     51,007,000     316,000
Probable Reserves 54,171,000 0.52 0.003 28,336,000 161,000
Total Proven and Probable Reserves   150,691,000     0.53     0.003     79,343,000     477,000
Measured Resources 60,528,000 0.49 0.004 29,709,000 233,000
Indicated Resources 80,423,000 0.47 0.003 37,745,000 250,000
Measured and Indicated Resources   140,951,000     0.48     0.003     67,454,000     483,000
Inferred Resources   59,597,000     0.52     0.003     31,195,000     179,000

Note: Effective December 31, 2015. Assumed metal prices for proven and probable reserves were $17.50 per ounce of silver and $1,250 per ounce of gold. Reserves were also evaluated using $15.50 per ounce of silver and $1,150 per ounce of gold to determine economic viability. It was determined that substantially all current reserves are economically viable at these lower price assumptions. Assumed metal prices for mineral resources were $19.00 per ounce of silver and $1,275 per ounce of gold.

About Coeur

Coeur Mining is the largest U.S.-based silver producer and a significant gold producer with five precious metals mines in the Americas employing approximately 2,000 people. Coeur produces from its wholly owned operations: the Palmarejo silver-gold mine in Mexico, the Rochester silver-gold mine in Nevada, the Kensington gold mine in Alaska, the Wharf gold mine in South Dakota, and the San Bartolomé silver mine in Bolivia. The Company also has a non-operating interest in the Endeavor mine in Australia in addition to royalties on the Cerro Bayo mine in Chile, the El Gallo complex in Mexico, the Zaruma mine in Ecuador, and the Correnso mine in New Zealand. In addition, the Company has two silver-gold exploration stage projects – the La Preciosa project in Mexico and the Joaquin project in Argentina. The Company also conducts ongoing exploration activities in Alaska, Argentina, Bolivia, Mexico, and Nevada. The Company owns strategic investment positions in several silver and gold development companies with projects in North and South America.

Cautionary Statement

This news release contains forward-looking statements within the meaning of securities legislation in the United States and Canada, including statements regarding drilling, potential discoveries, mine life, grades, and production. Such forward-looking statements involve known and unknown risks, uncertainties and other factors which may cause Coeur’s actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements. Such factors include, among others, the risks and hazards inherent in the mining business (including risks inherent in developing large-scale mining projects, environmental hazards, industrial accidents, weather or geologically related conditions), changes in the market prices of gold and silver and a sustained lower price environment, the uncertainties inherent in Coeur’s production, exploratory and developmental activities, including risks relating to permitting and regulatory delays, ground conditions, grade variability, any future labor disputes or work stoppages, the uncertainties inherent in the estimation of gold and silver ore reserves, changes that could result from Coeur’s future acquisition of new mining properties or businesses, reliance on third parties to operate certain mines where Coeur owns silver production and reserves and the absence of control over mining operations in which Coeur or its subsidiaries hold royalty or streaming interests and risks related to these mining operations including results of mining and exploration activities, environmental, economic and political risks of the jurisdiction in which the mining operations are located, the loss of any third-party smelter to which Coeur markets silver and gold, the effects of environmental and other governmental regulations, the risks inherent in the ownership or operation of or investment in mining properties or businesses in foreign countries, Coeur’s ability to raise additional financing necessary to conduct its business, make payments or refinance its debt, as well as other uncertainties and risk factors set out in filings made from time to time with the United States Securities and Exchange Commission, and the Canadian securities regulators, including, without limitation, Coeur’s most recent report on Form 10-K. Actual results, developments and timetables could vary significantly from the estimates presented. Readers are cautioned not to put undue reliance on forward-looking statements. Coeur disclaims any intent or obligation to update publicly such forward-looking statements, whether as a result of new information, future events or otherwise. Additionally, Coeur undertakes no obligation to comment on analyses, expectations or statements made by third parties in respect of Coeur, its financial or operating results or its securities.

Qualified Person

Dana Wills, Coeur’s Director, Resource Geology, and a qualified person under Canadian National Instrument 43-101, supervised the preparation of the scientific and technical information concerning Coeur’s mineral projects in this news release. Mineral resources are in addition to mineral reserves and do not have demonstrated economic viability. Inferred mineral resources are considered too speculative geologically to have the economic considerations applied to them that would enable them to be considered for estimation of mineral reserves, and there is no certainty that the inferred mineral resources will be realized. For a description of the key assumptions, parameters and methods used to estimate mineral reserves and resources, as well as data verification procedures and a general discussion of the extent to which the estimates may be affected by any known environmental, permitting, legal, title, taxation, socio-political, marketing or other relevant factors, Canadian investors should refer to the relevant NI 43-101-compliant Technical Report on file at www.sedar.com.

Cautionary Note to U.S. Investors – The United States Securities and Exchange Commission permits U.S. mining companies, in their filings with the SEC, to disclose only those mineral deposits that a company can economically and legally extract or produce. We may use certain terms in public disclosures, such as “measured,” “indicated,” “inferred” and “resources,” that are recognized by Canadian regulations, but that SEC guidelines generally prohibit U.S. registered companies from including in their filings with the SEC. U.S. investors are urged to consider closely the disclosure in our Form 10-K which may be secured from us, or from the SEC’s website at www.sec.gov. Silver equivalence assumes a 60:1 silver to gold ratio.

APPENDIX

 
Resource Discovery Drill Results at Rochester, East: July – November 2014
Mineralized Interval (feet)
Hole   From   To   Thickness   Silver Assays (Oz/short ton)   Gold Assays (Oz/short ton)
ER14-001   0   10   10   0.36   0.002
ER14-001 30 130 100 0.56 0.001
ER14-001 190 200 10 0.37 0.002
ER14-001 220 580 360 0.87 0.004
ER14-001 600 680 80 0.61 0.003
ER14-001 740 1230 490 1.95 0.005
ER14-001 1270 1300 30 0.40 0.002
ER14-002 0 100 100 0.68 0.002
ER14-002 140 150 10 0.66 0.002
ER14-002 170 330 160 1.60 0.005
ER14-002 360 480 120 0.62 0.002
ER14-002 560 590 30 0.45 0.003
ER14-002 720 740 20 0.80 0.004
ER14-002 900 920 20 0.75 0.010
ER14-003 0 120 120 0.50 0.002
ER14-003 380 560 180 0.53 0.002
ER14-003 600 680 80 0.40 0.000
ER14-003 720 820 100 0.63 0.003
ER14-003 870 1000 130 0.36 0.003
ER14-004 0 70 70 0.45 0.002
ER14-004 140 260 120 0.75 0.007
ER14-004 280 290 10 0.38 0.001
ER14-004 410 480 70 0.49 0.001
ER14-004 500 620 120 0.67 0.003
ER14-004 650 660 10 0.36 0.002
ER14-004 730 740 10 0.36 0.002
ER14-005 30 140 110 0.69 0.002
ER14-005 590 710 120 0.65 0.001
ER14-005 780 880 100 0.74 0.003
ER14-005 910 930 20 0.71 0.000
ER14-005 990 1000 10 1.17 0.004
ER14-005 1020 1060 40 0.51 0.001
ER14-005 1110 1120 10 0.41 0.002
ER14-005 1150 1160 10 0.34 0.002
ER14-005 1230 1240 10 2.98 0.013
ER14-006 0 120 120 0.50 0.002
ER14-006 450 490 40 0.41 0.001
ER14-006 550 560 10 0.38 0.001
ER14-006 600 610 10 0.41 0.000
ER14-006 690 770 80 0.66 0.002
ER14-006 830 900 70 1.10 0.004
ER14-006 1100 1120 20 0.42 0.003
ER14-007 10 50 40 0.43 0.002
ER14-007 60 70 10 0.37 0.002
ER14-007 110 120 10 0.35 0.002
ER14-007 130 150 20 0.38 0.002
ER14-007 190 200 10 0.35 0.008
ER14-007 230 400 170 0.66 0.003
ER14-007 420 490 70 0.52 0.001
ER14-007 550 590 40 0.62 0.001
ER14-007 710 740 30 1.12 0.003
ER14-008 0 50 50 0.39 0.004
ER14-008 60 120 60 0.63 0.003
ER14-008 370 450 80 0.58 0.003
ER14-008 510 520 10 0.38 0.002
ER14-008 540 570 30 0.47 0.002
ER14-008 610 640 30 0.43 0.001
ER14-008 720 740 20 0.45 0.001
ER14-008 830 840 10 0.38 0.002
ER14-008 1000 1010 10 0.41 0.000
ER14-008 1050 1060 10 0.42 0.000
ER14-008 1100 1110 10 0.42 0.002
ER14-008 1130 1140 10 0.34 0.014
ER14-009 40 90 50 0.42 0.002
ER14-009 210 260 50 0.47 0.004
ER14-009 280 340 60 0.44 0.004
ER14-009 360 480 120 0.82 0.002
ER14-009 500 510 10 0.34 0.001
ER14-009 670 680 10 0.70 0.004
ER14-009 800 820 20 0.44 0.004
ER14-010 10 20 10 0.42 0.001
ER14-010 70 80 10 0.98 0.002
ER14-010 120 360 240 2.11 0.083
ER14-010 380 390 10 0.55 0.005
ER14-010 450 460 10 0.62 0.002
ER14-010 690 730 40 0.75 0.005
ER14-010 790 800 10 0.35 0.005
ER14-011 50 100 50 0.44 0.001
ER14-011 140 150 10 0.41 0.000
ER14-011 230 240 10 0.51 0.000
ER14-011 510 520 10 0.44 0.002
ER14-011 770 780 10 0.35 0.001
ER14-012 10 60 50 0.71 0.002
ER14-012 80 90 10 0.44 0.002
ER14-012 140 150 10 0.34 0.000
ER14-012 330 380 50 0.36 0.002
ER14-012 400 450 50 0.49 0.002
ER14-012 520 530 10 0.37 0.000
ER14-012 710 740 30 0.46 0.003
ER14-012 770 790 20 0.64 0.003
ER14-012 820 840 20 0.59 0.003
ER14-012 860 870 10 0.34 0.001
ER14-013 10 40 30 0.52 0.004
ER14-013 50 60 10 0.48 0.002
ER14-013 370 380 10 0.48 0.002
ER14-013 520 530 10 0.47 0.002
ER14-013 710 720 10 0.38 0.005
ER14-013 740 750 10 0.44 0.001
ER14-013 780 800 20 0.45 0.001
ER14-014 70 90 20 0.68 0.002
ER14-014 280 290 10 0.43 0.003
ER14-014 430 570 140 0.61 0.002
ER14-014 620 640 20 1.21 0.006
ER14-014 730 760 30 0.78 0.003
ER14-014 840 850 10 0.46 0.001
ER14-015 80 90 10 0.45 0.000
ER14-015 390 530 140 0.54 0.003
ER14-015 650 670 20 0.72 0.002
ER14-015 970 980 10 6.69 0.010
ER14-016 60 110 50 0.78 0.003
ER14-016 390 400 10 0.37 0.004
ER14-016 420 450 30 0.70 0.005
ER14-016 470 480 10 0.39 0.003
ER14-016 500 530 30 0.35 0.002
ER14-016 610 620 10 0.44 0.002
ER14-016 690 700 10 0.34 0.005
ER14-017 0 10 10 0.34 0.003
ER14-017 30 40 10 0.35 0.003
ER14-017 360 380 20 0.42 0.002
ER14-017 410 440 30 0.61 0.001
ER14-017 500 520 20 0.39 0.002
ER14-017 540 560 20 0.49 0.000
ER14-018 60 70 10 0.51 0.003
ER14-018 160 170 10 0.54 0.002
ER14-018 220 230 10 0.34 0.003
ER14-018A 220 230 10 0.45 0.006
ER14-018A 270 280 10 0.34 0.009
ER14-018A 320 340 20 0.35 0.000
ER14-018A 370 460 90 0.39 0.004
ER14-018A 480 640 160 0.48 0.002
ER14-019 80 120 40 0.49 0.005
ER14-019 260 320 60 0.48 0.004
ER14-019 400 410 10 0.42 0.000
ER14-019 530 540 10 0.66 0.001
ER14-019 610 620 10 0.42 0.001
ER14-020 40 60 20 0.49 0.003
ER14-020 130 140 10 0.36 0.002
ER14-020 180 230 50 0.62 0.002
ER14-020 290 310 20 0.41 0.006
ER14-020 360 490 130 0.52 0.002
ER14-020 510 640 130 0.85 0.003
ER14-021 160 170 10 0.38 0.001
ER14-021 390 400 10 0.38 0.003
ER14-021 490 500 10 0.35 0.001
ER14-022 0 120 120 0.63 0.002
ER14-022 250 320 70 1.49 0.007
ER14-022 350 480 130 1.09 0.004
ER14-022 500 540 40 0.50 0.006
ER14-022 570 590 20 0.58 0.005
ER14-022 630 680 50 0.37 0.005
ER14-022 790 800 10 0.54 0.002
ER14-022 830 850 20 1.27 0.007
ER14-022 870 880 10 0.36 0.003
ER14-022 920 930 10 0.41 0.003
ER14-022 950 1090 140 0.72 0.004
ER14-022 1110 1270 160 0.57 0.004
ER14-023 0 30 30 0.56 0.002
ER14-023 50 60 10 0.41 0.001
ER14-023 150 200 50 1.11 0.019
ER14-023 260 300 40 0.56 0.008
ER14-023 320 330 10 0.45 0.003
ER14-023 410 540 130 0.84 0.005
ER14-023 600 610 10 0.63 0.004
ER14-023 740 810 70 0.61 0.007
ER14-023 860 870 10 0.45 0.007
ER14-023 920 930 10 1.19 0.030
ER14-024 30 50 20 0.52 0.003
ER14-024 180 200 20 0.57 0.006
ER14-024 220 230 10 0.39 0.005
ER14-024 280 290 10 0.35 0.001
ER14-024 350 470 120 0.88 0.006
ER14-024 530 540 10 0.46 0.007
ER14-024 570 590 20 0.53 0.003
ER14-024 630 780 150 0.94 0.005
ER14-024 930 1020 90 0.97 0.003
ER14-025 0 10 10 0.45 0.002
ER14-025 160 190 30 0.34 0.006
ER14-025 200 220 20 0.35 0.004
ER14-025 410 470 60 0.62 0.002
ER14-025 500 530 30 0.50 0.002
ER14-025 620 630 10 0.60 0.101
ER14-026 0 20 20 0.44 0.002
ER14-026 160 210 50 0.48 0.004
ER14-026 250 270 20 0.57 0.005
ER14-026 310 470 160 0.78 0.004
ER14-026 500 510 10 0.35 0.000
ER14-026 610 630 20 0.45 0.006
ER14-026 660 950 290 0.77 0.003
ER14-026 1110 1120 10 0.34 0.001
ER14-026 1150 1160 10 0.34 0.004
ER14-028 0 90 90 0.41 0.002
ER14-028 110 120 10 0.36 0.001
ER14-028 140 150 10 0.46 0.002
ER14-028 170 260 90 0.57 0.006
ER14-028 290 400 110 0.74 0.004
ER14-028 580 600 20 1.83 0.013
ER14-029 0 10 10 0.54 0.005
ER14-029 20 70 50 0.45 0.002
ER14-029 130 150 20 0.47 0.004
ER14-029 220 230 10 0.35 0.004
ER14-029 310 470 160 0.53 0.001
ER14-029 580 600 20 0.64 0.004
ER14-030 0 70 70 0.44 0.002
ER14-030 140 210 70 0.60 0.006
ER14-030 230 240 10 0.77 0.003
ER14-030 260 360 100 0.49 0.002
ER14-030 420 460 40 1.14 0.002
ER14-030 490 500 10 0.49 0.006
ER14-030 560 630 70 1.66 0.002
ER14-030 710 720 10 0.37 0.002
ER14-031 400 410 10 0.36 0.002
ER14-031 670 770 100 1.63 0.019
ER14-032 0 80 80 0.59 0.005
ER14-032 120 440 320 2.02 0.014
ER14-032 490 560 70 2.34 0.003
ER14-032 590 620 30 0.71 0.002
ER14-033 10 40 30 0.58 0.002
ER14-033 100 110 10 0.36 0.005
ER14-033 160 170 10 0.34 0.002
ER14-033 180 190 10 0.39 0.004
ER14-033 220 460 240 0.79 0.004
ER14-033 500 600 100 0.96 0.003
ER14-033 620 640 20 0.68 0.007
ER14-033 670 700 30 0.51 0.003
ER14-034 0 30 30 0.68 0.002
ER14-034 120 130 10 0.35 0.000
ER14-034 170 230 60 1.01 0.005
ER14-034 300 320 20 0.42 0.010
ER14-034 360 370 10 0.66 0.003
ER14-034 400 500 100 0.61 0.004
ER14-034 630 770 140 0.70 0.003
ER14-034 810 830 20 0.50 0.006
ER14-034 990 1000 10 0.53 0.001
ER14-035 170 200 30 0.77 0.007
ER14-035 230 260 30 0.60 0.003
ER14-035 280 290 10 0.44 0.003
ER14-035 440 460 20 0.83 0.002
ERC14-002 110 120 10 0.46 0.000
ERC14-002 310 429 119 2.78 0.009
ERC14-002 461 501 40 0.58 0.003
ERC14-002 518 566 48 0.55 0.003
ERC14-002 592 643 51 0.66 0.003
ERC14-002 724 903 179 4.75 0.009
ERC14-002 907 1014 106 0.95 0.002
ERC14-002 1024 1045 20 0.75 0.001
ERC14-002 1068 1085 17 3.71 0.009
ERC14-002 1108 1159 51 0.45 0.001
ERC14-002 1170 1223 53 0.98 0.003
ERC14-002   110   120   10   0.46   0.000
Notes:  
1. Drill intercepts from reverse circulation drill samples were prepared and analyzed by Skyline Labs in Sparks Nevada.
2. Core hole sample intercepts were split on site, and were prepared and analyzed by Skyline Labs in Sparks Nevada.
3. Samples were analyzed by 30 gram fire assay-AA finish with palladium inquart for silver and gold. Gold over 0.5 ppm and silver over 50 ppm are reassayed using 30 gram fire assay-gravimetric finish.
4. Mineralized interval composited assays calculated using 0.34 ounces/ton Ag cutoff grade.
5. Maximum of 10 feet of internal dilution (less than cutoff grade) permitted in compositing.
     
Category: General