WINNEMUCCA, NEVADA--(Marketwired - Dec. 15, 2015) - Paramount Gold Nevada Corp. (NYSE MKT:PZG) ("Paramount") announced today that the National Instrument 43-101 technical report related to the Preliminary Economic Assessment ("PEA") on its 100% owned Sleeper Gold Project was filed on SEDAR (www.sedar.com). The report was completed by Metal Mining Consultants ("MMC") (www.metalminingconsultants.com) of Denver, Colorado.
Highlights of the PEA include:
- Low Initial Capital of $175 Million for a 30,000 tonnes per day operation
- Estimated annual production of 102,000 ounces of Gold and 105,000 ounces of Silver
- Low cash operating cost of $529 per ounce of Gold Equivalent produced
- Base Case has a $244 million pre-tax net cash flow, a $167 million net present value at a 5% discount rate and an internal rate of return of 25%
- Quick capital payback period of 3.5 years based on after tax cash flows
- Confirms the potential to add mineralized material
MMC's recommendation is to advance the project towards Prefeasibility (PFS Paramount has sufficient cash in its treasury to complete this advancement which MMC estimates a direct PFS of $1.45 million. Additional components to completing the PFS are as follows:
- Expand metallurgical testing program to verify and optimize metallurgical recovery for the various zones. This process will require a drill program to develop sample materials which will also convert additional Inferred mineralized material to Measured & Indicated.
- Start complementing base line studies to the ongoing environmental monitoring of the mine with the goal of starting additional permitting processes related to re-opening the operation.
- Convert inferred mineralized material within the mine plan to measured & indicated
Given this positive PEA coupled with MMC's recommendation, Paramount's team is in the midst of composing a detailed plan along with the the expected budget required to complete a PFS
A prefeasibility study is intended to assist in determining whether its potential investment will pay off. Prior to committing a large sum of cash to collect information and obtain permits, this study which uses the base case for developing a project is completed to determine whether the project may be developed further. This study would incorporate a wide array of information including but not limited to geologic models, mine design, community relations, permit challenges and timing, infrastructure, and geographic obstacles.
In the case of Sleeper, a prefeasibility study would entail both additional metallurgical testing and infill drilling which would potentially convert mineralized material to economic reserves. It is important to note that the company holds numerous permits in good standing from the former mine, which will provide an excellent base for the future permitting process.
The report incorporates a global mineralized material estimate completed by SRK Consulting (www.srk.com), the results of new metallurgical tests completed over the last two years by McClelland Laboratories (www.mettest.com), and updated gold ($1250) and silver ($16) pricing that reflects the current metals market.
The base case scenario is a 30,000 tonne per day heap leach only operation which is fed by open pit mining based on mining higher grade open pit oxide and suitable mixed mineral materials, fed by open pit mining.
Commenting on the PEA, Paramount President and CEO, Glen van Treek stated, "We are extremely pleased with the approach taken on this PEA by MMC, which focused on the reduction of capital and operational costs within a proven heap leach operation. The project costs per ounce of gold equivalent produced on a cash cost and all in sustaining cost basis including initial capital expenditures are $529 and $869 respectively, which is very competitive as compared to its peers. The results of this PEA clearly indicate that Sleeper could be an economical operation in the current metal price environment and we are excited to take the next steps towards making this a reality. "
This PEA is preliminary in nature and should not be considered to be a pre-feasibility or feasibility study, as the economics and technical viability of the Sleeper Gold Project have not been demonstrated at this time. Furthermore, there is no certainty that the PEA will be realized.
BASE CASE DETAILS
Mineral Inventory
In May 2015, SRK completed a National Instrument 43-101-compliant global estimate for the Sleeper project (see news release dated May 5, 2015 for details). The Sleeper database used for SRK's estimate includes more than 4,000 reverse circulation and core drill holes, as well as historical surface mapping and new 3-Dimensional interpretations, to create a comprehensive lithological and structural model over the entire deposit. Additionally, data from more than 378,000 blast holes, collected while the project was in operation, were utilized to define trends, orientations and inclinations for the principal mineral zones. In their analysis, SRK estimated mineralized material for oxide, mixed and sulphide material separately, and reported it at various cut-off grades. The estimate, prepared by SRK, in the form of the 3-D block model, was used by MMC as the basis for determining mineable mineralization in the PEA.
The National Instrument 43-101 compliant global mineralized material estimate by SRK at a cut-off grade of 0.15 grams of gold per tonne are as follows:
Global Measured Material
|
| Cut-off Grade (g/T) |
|
Tonnes (000's) |
|
Gold Grade (g/T) |
|
Gold (000's of ounces) |
|
Silver Grade (g/T) |
|
Silver (000's of ounces) |
| 0.15 |
|
200,500 |
|
0.39 |
|
2,488 |
|
3.5 |
|
22,368 |
| |
|
|
|
|
|
|
|
|
|
|
Global Indicated Material
|
| Cut-off Grade (g/T) |
|
Tonnes (000's) |
|
Gold Grade (g/T) |
|
Gold (000's of ounces) |
|
Silver Grade (g/T) |
|
Silver (000's of ounces) |
| 0.15 |
|
93,900 |
|
0.31 |
|
933 |
|
2.8 |
|
8,427 |
| |
|
|
|
|
|
|
|
|
|
|
Global Measured Plus Indicated Material
|
| Cut-off Grade (g/T) |
|
Tonnes (000's) |
|
Gold Grade (g/T) |
|
Gold (000's of ounces) |
|
Silver Grade (g/T) |
|
Silver (000's of ounces) |
| 0.15 |
|
294,400 |
|
0.36 |
|
3,421 |
|
3.3 |
|
30,794 |
| |
|
|
|
|
|
|
|
|
|
|
Global Inferred Material
|
| Cut-off Grade (g/T) |
|
Tonnes (000's) |
|
Gold Grade (g/T) |
|
Gold (000's of ounces) |
|
Silver Grade (g/T) |
|
Silver (000's of ounces) |
| 0.15 |
|
241,800 |
|
0.32 |
|
2,472 |
|
1.9 |
|
15,004 |
Mine Planning
MMC selected an open pit/heap leach mining method as the basis of the analysis and evaluation for the PEA. A production schedule of the leachable material averaging 0.41 g/T gold over life of mine was the result of selecting a gold price pit design of $650/oz.
A Preliminary Economic Assessment provides a basis to estimate project operating and capital costs and establish a projection of the potential mineable resource including measured, indicated and inferred confidence levels as permitted under National Instrument 43-101. Whittle pit optimization was performed using estimates of operating costs typical of operating surface mines using heap leach processing in northern Nevada, using estimates of metallurgical recovery based on test work performed on Sleeper drill core and waste dump material and consideration of historical operating results for heap leaching at the original Sleeper mine. The ultimate pit shell was determined using gold price of $650 per ounce in order to process the higher gold grade material. In-pit mineralized material and mineralized dumps used for production scheduling are as follows:
| Resource Category |
|
Mineralized Material (000s Tonnes) |
|
Gold Grade (g/T) |
|
Gold
(000s of ounces) |
|
Silver Grade (g/T) |
|
Silver
(000s of ounces) |
| Measured |
|
32,596 |
|
0.38 |
|
399 |
|
3.54 |
|
3,714 |
| Indicated |
|
10,089 |
|
0.35 |
|
112 |
|
2.29 |
|
744 |
| Measured and Indicated |
|
42,685 |
|
0.37 |
|
511 |
|
3.25 |
|
4,458 |
| Inferred |
|
34,924 |
|
0.46 |
|
511 |
|
0.57 |
|
640 |
Note: Rounding may cause apparent discrepancies.
The estimated strip ratio for the economic pit is 0.72.
Paramount notes that the PEA incorporates inferred mineral resources, which are considered too geologically speculative to have economic considerations applied to them that would enable them to be categorized as mineral reserves. Therefore, Paramount advises that there can be no certainty that the estimates contained in the PEA will be realized.
Metallurgy
Paramount has performed scoping level metallurgical testing to provide a basis to project potential process recoveries for oxide, mixed, sulphide and mine dump material. Data was available from bottle roll testing and column leach testing of drill samples from the mine dumps, Facilities Zone, Sleeper Zone, Westwood Zone and tailings. The tests indicated that materials from the Facilities Zone and mine dumps had generally high gold recovery in cyanide leach tests, while the Westwood Zone and Sleeper tails material had generally lower gold recovery in cyanide leach tests. For the PEA Base Case, no sulphide mineralization was considered and has been left out of the economic analysis.
Four general mining zones were defined and included in the Base Case on the basis of metallurgical testing and historical mining performance: (1) the Facilities Zone (an area on the eastern edge of the Sleeper surface excavation); (2) the Sleeper Zone (a continuation of the original Sleeper Pit); (3) Oxide portions of the West Wood and Wood areas and (4) mineralized mine dumps from past mining operations at Sleeper.
The heap leach process recovery assumptions for both oxide and mixed mineralized material in the "Whittle Pit" optimization were determined based on both historical metallurgical performance and all test data conducted by Paramount. The recovery assumptions are as follows
- Alluvium - 72% for gold and 8% for silver
- Mine Dumps - 72% for gold and 42.5% for silver
- Facilities Zone - 79% for gold and 8% for silver
- Mixed Zones - 67.5% for gold and 20% for silver
- Sleeper Zone - 85% for gold and 10% for silver
- West Wood Zone - 72% for gold and 9% for silver
The processing facilities in the PEA were assumed to be standard cyanide heap leaching with a carbon-in-column and ADR recovery plant. Heap leach material would be crushed to P80 -3/4 inch (19 mm) using a primary and secondary crushing circuit. It was assumed that agglomeration would be required for heap leaching. The crushing circuit would be sized for a throughput of 30,000 tonnes per day. The process facilities would produce a doré for direct sale to a regional refinery. It was assumed that metal produced would be sold at spot prices for gold and silver.
Capital Costs
Capital costs were developed based on scaling costs from similar facilities for production rates and from design basis assumptions including an owner-operated mining fleet. The costs are collected in three separate categories: (i) initial capital (construction costs to initiate mining operations and heap leach processing); (ii) sustaining capital (costs associated with equipment additions/replacements or system rebuilds); and (iii) contingency estimates. The estimated LOM capital costs for the Base Case scenario are summarized as follows:
Life of Mine (LOM) Estimated Capital Costs
| Cost Category |
|
Capital Cost (Millions) |
| Initial |
|
145.5 |
| Expansion |
|
22.6 |
| Sustaining Capital |
|
37.4 |
| Contingency |
|
29.4 |
| Initial Fills & Spares |
|
5.0 |
| Working Capital |
|
18.9 |
| Total Capital Cost |
|
258.8 |
Operating Costs
Operating cost assumptions were based on similar scale surface mining operations using heap leach processing in northern Nevada, and process cost estimates for key consumables based on the available metallurgical test data, power consumption data and prevailing costs for key materials in similar Nevada mining operations. Operating cost assumptions per tonne of material processed are summarized as follows:
Unit Operating Costs
| Cost Category |
Cost
Per Tonne Processed |
| Mining Costs (includes waste) |
2.41 |
| Heap Leach Processing |
1.98 |
| Administrative |
0.78 |
| Dewatering |
0.20 |
| Reclamation |
0.11 |
| Total |
5.48 |
Economic Analysis
The Base Case economic evaluation used $1,250 per ounce of gold and $16 per ounce of silver to reflect the latest year average prices. A Spot Price case was also prepared using October 12, 2015 spot gold and silver prices. The Base Case pre-tax and post-tax economic results for both sets of metal price assumptions are as follows:
Pre-Tax Projected Economic Results
|
| |
Base Case |
Spot Price
Case |
Long term Price Case |
| Gold Price Per Ounce |
$1,250 |
$1,185 |
$1,400 |
| Silver Price Per Ounce |
$16 |
$16 |
$19 |
| Net Cash Flow |
$290.5 million |
$241.6 million |
$405.5 million |
| NPV @ 5% Discount Rate |
$201.8 million |
$161.7 million |
$296.4 million |
| IRR |
28.4% |
24.1% |
38.1% |
| Operating Costs Per Ounce of Gold Equivalent Produced (life of mine) |
$529 |
$529 |
$529 |
| Total Costs Per Ounce of Gold Equivalent Produced (includes all capital) |
$869 |
$869 |
$869 |
| |
|
|
|
Post-Tax Projected Economic Results
|
| |
Base Case |
Spot Price
Case |
Long term Price Case |
| Gold Price Per Ounce |
$1,250 |
$1,185 |
$1,400 |
| Silver Price Per Ounce |
$16 |
$16 |
$19 |
| Net Cash Flow |
$198.5 million |
$165.0 million |
$277 million |
| NPV @ 5% Discount Rate |
$125.8 million |
$98.3 million |
$190.5 million |
| IRR |
20% |
17 % |
27% |
| Operating Costs Per Ounce of Gold Equivalent Produced (life of mine) |
$529 |
$529 |
$529 |
| Total Costs Per Ounce of Gold Equivalent Produced (includes all capital) |
$869 |
$869 |
$869 |
Infrastructure
Existing infrastructure at the Sleeper mine site will require upgrades for the projected mine configuration, however, the basic components remain in place. The site is currently connected to the regional electrical grid, although substantial capacity upgrade would be required. Gravel road access connecting the Sleeper mine site to paved, all weather highways 140 and 95 is in place and in excellent condition.
Winnemucca, NV, a community of 7,400 people, is immediately to the south of Sleeper at the junction of Highway 95 and Interstate Highway I-80. Mining and industrial skills required by the mining operation are readily available in the area, as Winnemucca supports numerous existing gold mining operations.
Existing shop and office buildings at Sleeper are located on top of the Facilities Zone, and would require removal and reconstruction. Heap leach pad and process facilities would have to be constructed; however, very favorable flat terrain should result in low cost and rapid completion.
Renewed mining at Sleeper would require the development of a dewatering system to empty the existing mine lake, control inflow to the mine excavations and create a local depression in the hydrologic regime to allow deepening of the mine. The previous mining created a system of dewatering wells, however, only some monitoring wells remain functional. New wells would need to be installed, and a wetlands or rapid infiltration basin constructed.
National Instrument 43-101 Disclosure
The PEA for the Sleeper Gold Project was prepared by Metal Mining Consultants Inc. ("MMC") under the direction of Mr. Scott E. Wilson, CPG, a Qualified Person (as defined under National Instrument 43-101) and is independent of Paramount Gold Nevada Corp. Scott Wilson has reviewed and approved this press release.
About Paramount
Paramount Gold Nevada is a U.S. based precious metals exploration company. Paramount owns 100% interest in the Sleeper Gold Project located in Northern Nevada. The Sleeper Gold Project, which includes the former producing Sleeper mine, totals 2,322 unpatented mining claims (approximately 60 square miles or 15,500 hectares).
Paramount's strategy is to create shareholder value through the exploration and development of its mineral properties and then selling to, or entering into joint ventures with, producers for construction and operation.
Cautionary Note to U.S. Investors Concerning Estimates of Indicated and Inferred Resources
This news release uses the terms "measured and indicated resources" and "inferred resources". We advise U.S. investors that while these terms are defined in, and permitted by, Canadian regulations, these terms are not defined terms under SEC Industry Guide 7 and not normally permitted to be used in reports and registration statements filed with the SEC. "Inferred resources" have a great amount of uncertainty as to their existence, and great uncertainty as to their economic and legal feasibility. It cannot be assumed that all or any part of an inferred mineral resource will ever be upgraded to a higher category. Under Canadian rules, estimates of inferred mineral resources may not form the basis of a feasibility study or prefeasibility studies, except in rare cases. The SEC normally only permits issuers to report mineralization that does not constitute SEC Industry Guide 7 compliant "reserves", as in-place tonnage and grade without reference to unit measures. U.S. investors are cautioned not to assume that any part or all of mineral deposits in this category will ever be converted into reserves. U.S. investors are cautioned not to assume that any part or all of an inferred resource exists or is economically or legally minable.
Safe Harbor for Forward-Looking Statements
This release and related documents may include "forward-looking statements" including, but not limited to, statements related to the interpretation of drilling results and potential mineralization, future exploration work at the Sleeper Gold Project and the expected results of this work, estimates of resources for the Sleeper including expected volumes and grades and the economic projections included in the Sleeper Gold Project's PEA. Forward-looking statements are statements that are not historical fact and are subject to a variety of risks and uncertainties which could cause actual events to differ materially from those reflected in the forward-looking statements including fluctuations in the price of gold, inability to complete drill programs on time and on budget, and future financing ability. Paramount's future expectations, beliefs, goals, plans or prospects constitute forward-looking statements within the meaning of the United States Private Securities Litigation Reform Act of 1995 and other applicable securities laws. Words such as "believes," "plans," "anticipates," "expects," "estimates" and similar expressions should also be considered to be forward-looking statements. There are a number of important factors that could cause actual results or events to differ materially from those indicated by such forward-looking statements, including, but not limited to: uncertainties involving interpretation of drilling results, environmental matters, lack of ability to obtain required permitting, equipment breakdown or disruptions, and the other factors described in Paramount's disclosures as filed with the SEC.
Except as required by applicable law, Paramount disclaims any intention or obligation to update any forward-looking statements as a result of developments occurring after the date of this document.