VANCOUVER , July 13, 2015 /CNW/ - Nevada Sunrise Gold Corporation ("Nevada Sunrise" or the "Company") (NEV.V) announces that Pilot Gold Inc. ("Pilot Gold") (PLG.TO) has reported additional metallurgical results designed to test the amenability of gold mineralization hosted in the Dunderberg (Candland) Shale at the Kinsley Mountain Project ("Kinsley Mountain" or the "Project") to produce a saleable concentrate. The Dunderberg Shale was the primary host rock in the historical mining operation, and is the shallow host rock at the Western Flank. Previous concentrate testing of deeper Secret Canyon Shale-hosted gold mineralization produced up to 89.6% recovery and up to 312 g/t concentrate grade in metallurgical testing (see Nevada Sunrise news release of January 19, 2015 ).
Pilot Gold states that these recent metallurgical test results demonstrate that Kinsley Mountain's main host rocks can produce medium to high-grade concentrates with very good to excellent gold recoveries and the potential of low capital cost options for possible mining and processing at the Project.
The test work, initiated in March 2015 , used the same flowsheet developed for mineralization hosted in the Secret Canyon Shale.
Summary Highlights:
|
Composite |
Overall Au Recovery (%) |
Concentrate Grade (g/t) |
Calculated Feed Grade (g/t) |
|
WF-CC#1 |
83.0 |
52.3 |
4.82 |
|
WF-CC#2 |
82.6 |
42.0 |
2.81 |
Overall, these results indicate that the Dunderberg Shale material, like that from the Secret Canyon Shale, may be amenable to production of a concentrate. The results may be improved with further study of primary and regrind sizes and flowsheet refinements particular to the Dunderberg Shale.
Flotation testing of Dunderberg Shale-hosted mineralization was undertaken after analyses revealed a relatively medium grain size for gold-bearing pyrites, relatively low sulfide sulfur concentrations and high gold to sulfide sulfur ratios (ranging from 2.3 to 2.6) relative to typical Carlin-style sediment-hosted gold deposits. These data suggested that the mineralized material may be amenable to producing a concentrate of sufficient grade to support low cost on-site or off-site treatment, over more expensive whole ore treatment options such as roasting or autoclaving.
Two composites with calculated feed grades of 4.82 and 2.81 g/t gold were selected. The scope of work was intended to provide a preliminary determination as to how the two composites would respond to the flowsheet developed previously for Western Flank Secret Canyon Shale-hosted gold mineralization. In the case of the latter, samples were subjected to rougher and scavenger flotation testing over a range of conditions including variations in grind size, followed by cyanidation of the flotation tails. Combined concentrate recoveries ranged from a low of 76% to a high of 89.6%. Combined with cyanidation of the flotation tails, the total recovery increased to 89.0% to 95.0%. The concentrate grades ranged from a low of 98.6 g/t gold to a high of 312 g/t gold, with gold recovery to concentrate highest in the higher-grade and less oxidized samples.
The two composites from Dunderberg Shale-hosted gold mineralization returned concentrate grades of 52.3 and 42.0 g/t gold, corresponding to overall recoveries of 83.0 and 82.6%, respectively. The mineralized material was not oxidized, and no benefit was realized from cyanide leaching of the tails. However, cyanide leach testing of tails would likely result in recovery of additional gold from partially oxidized material.
Concentrates were assayed for deleterious elements and were found to contain arsenic and antimony. Arsenic in the concentrate tested ranged from 1.55% to 3.14% and averaged 2.35% while antimony in the concentrate tested ranged from 0.048% to 0.067% and averaged 0.058%. While arsenic and antimony are elevated, it is believed the levels would not preclude direct sale to a typical Nevada refractory ore processing facility.
Gary Simmons , of GL Simmons Consulting, LLC (B.S. Extractive Metallurgy), a Qualified Professional with the Mining and Metallurgical Society of America is the Qualified Person, within the meaning of National Instrument 43-101 Standards of Disclosure for Mineral Projects ("NI 43-101"), who has overseen the collection and verification of the data for this news release and has reviewed and approved this news release's content. Mr. Simmons is independent of Pilot Gold and Nevada Sunrise. Metallurgical testing was conducted at Hazen Research, Inc. in Denver, Colorado .
John R. Kerr , P. Eng., is the Company's designated Qualified Person for this news release within the meaning of National Instrument 43-101 ("NI 43-101") and has reviewed and approved the technical information contained in this release.
About Kinsley Mountain
Kinsley Mountain is a joint venture between Pilot Gold and Nevada Sunrise, with Pilot Gold, the operator, holding a 79.1 percent interest, and Nevada Sunrise, through a wholly-owned U.S. subsidiary, holding a 20.9 percent interest. Kinsley Mountain hosts near-surface mineralization similar to other Carlin-style, sediment-hosted gold systems. The Project consists of 475 claims on U.S. Bureau of Land Management land including 5 leased patents totalling 9,575 acres (3,875 hectares) and hosts a past-producing mine with an extensive exploration database and numerous, untested gold targets.
Kinsley Mountain is an early-stage exploration project and does not contain any mineral resource estimates as defined by NI 43-101. The potential quantities and grades disclosed herein are conceptual in nature and there has been insufficient exploration to define a mineral resource for the targets disclosed herein. It is uncertain if further exploration will result in these targets being host to a mineral resource.
Further information on Kinsley Mountain is available in the recently filed NI 43-101 Technical Report entitled "Updated Technical Report on the Kinsley Project, Elko and White Pine Counties, Nevada, U.S.A. " (the "Report"), effective March 1, 2015 and dated March 19, 2015 , available on Nevada Sunrise's SEDAR listing at http://www.sedar.com and on Nevada Sunrise's website. The Report was prepared by Michael M. Gustin , C.P.G. of Mine Development Associates, Pilot Gold Chief Geologist, Moira Smith , Ph.D., P.Geo. and Gary L. Simmons , MMSA from GL Simmons Consulting LLC. Each of Messrs. Gustin and Simmons and Dr. Smith are Qualified Persons for the purposes of NI 43-101.
About Nevada Sunrise
Nevada Sunrise is a junior gold exploration company with a strong technical team based in Vancouver, BC , Canada , that holds interests in three exploration projects in Nevada, USA . Our three key assets include Kinsley Mountain near Wendover , the Golden Arrow project near Tonopah , and the recently-acquired Roulette property (formerly known as the Grulla property) near Ely, Nevada .
FORWARD LOOKING STATEMENTS
All statements in this release, other than statements of historical fact, are "forward-looking information" with respect to Nevada Sunrise Gold Corporation ("Nevada Sunrise") within the meaning of applicable Canadian securities laws, including statements that address future mineral production, reserve potential, exploration drilling, the future price of gold, potential quantity and/or grade of minerals, potential size of a mineralized zone, potential expansion of mineralization, the timing and results of future resource estimates, or other study, proposed exploration and development of our exploration properties and the estimation of mineral resources. Forward-looking information is often, but not always, identified by the use of words such as "seek", "anticipate", "plan", "continue", "estimate", "expect", "project", "predict", "potential", "targeting", "intends", "believe", "potential", and similar expressions, or describes a "goal", or variation of such words and phrases or state that certain actions, events or results "may", "should", "could", "would", "might" or "will" be taken, occur or be achieved. These statements involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievement of Nevada Sunrise to differ materially from those anticipated in such forward-looking information.
Such factors include, among others, risks related to the interpretation and actual results of historical production at Kinsley Mountain, reliance on technical information provided by third parties on any of our exploration properties, including access to historical information on the Kinsley Mountain property as well as specific historic data associated with and drill results from the property, information from Pilot Gold Inc., current exploration and development activities; changes in project parameters as plans continue to be refined; current economic conditions; future prices of commodities; possible variations in grade or recovery rates; failure of equipment or processes to operate as anticipated; the failure of contracted parties to perform; failure of Pilot Gold Inc., to complete anticipated work programs; labor disputes and other risks of the mining industry; delays in obtaining governmental approvals, financing or in the completion of exploration, as well as those factors discussed in the section entitled "Risk Factors" in the Company's Management Discussion and Analysis for the Six Months ended March 31 , 2015 which is available under Company's SEDAR profile at www.sedar.com.
Although Nevada Sunrise has attempted to identify important factors that could cause actual actions, events or results to differ materially from those described in forward-looking information, there may be other factors that cause actions, events or results not to be as anticipated, estimated or intended. There can be no assurance that such information will prove to be accurate as actual results and future events could differ materially from those anticipated in such statements. Nevada Sunrise disclaims any intention or obligation to update or revise any forward-looking information, whether as a result of new information, future events or otherwise. Accordingly, readers should not place undue reliance on forward-looking information.
Forward-looking statements are made as of the date hereof and accordingly are subject to change after such date. Except as otherwise indicated by Nevada Sunrise, these statements do not reflect the potential impact of any non-recurring or other special items or of any dispositions, monetizations, mergers, acquisitions, other business combinations or other transactions that may be announced or that may occur after the date hereof. Forward-looking statements are provided for the purpose of providing information about management's current expectations and plans and allowing investors and others to get a better understanding of our operating environment. Nevada Sunrise does not undertake to update any forward-looking statements that are included in this document, except in accordance with applicable securities laws.
Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of TSX Venture Exchange) accepts responsibility for the adequacy of accuracy of this release. The Securities of Nevada Sunrise Gold Corporation have not been registered under the United States Securities Act of 1933, as amended, and may not be offered or sold within the United States or to the account or benefit of any U.S. person.
SOURCE Nevada Sunrise Gold Corporation
Image with caption: "Nevada Sunrise Gold Corporation logo (CNW Group/Nevada Sunrise Gold Corporation)". Image available at: http://photos.newswire.ca/images/download/20150713_C4065_PHOTO_EN_443445.jpg
