Corvus Gold (KOR-T) Jan 13, '15 announces further results from its 2014 exploration program to test the southern expansion potential of the Yellowjacket deposit. The results also include a series of holes that expand the previously discovered West Vein zone at depth which include NB-14-414 (11 metres @ 8.1 g/t gold and 30 g/t silver) and NB-14-410 (9.9 metres @ 3.2 g/t gold and 124.3 g/t silver) (Table 1, Figure 1). Holes NB-14-417 (7.8 metres @ 1.1 g/t gold and 1 g/t silver) and NB-14-422 (3.5 metres @ 2.6 g/t gold and 3.3 g/t silver) illustrate the continuation of Yellowjacket type vein mineralization well to the south of the 2013 resource area. Although drilling conditions to the south were difficult and several holes were lost due to poor ground these new results indicate that the Yellowjacket system now continues at least 200 metres to the south of the deposits original discovery hole NB-12-138 (4.3 metres @ 20 g/t gold and 1519 g/t silver) with broad oxide, heap leach mineralization extending at least another 100 metres beyond that.
The current interpretation of the southern Yellowjacket expansion zone is the typical Josh type higher grade vein system is further at depth which will be an immediate target for future exploration. In addition new high-grade vein targets are developing in this area such as the NE60 and NE70 fault zones, with characteristic upper level Josh Vein type mineralization like that in hole NB-14-424 (7.3 metres of quartz vein with 0.6 g/t gold and 4 g/t silver). The southern exploration program has now outlined a significant new Yellowjacket resource expansion area for future exploration.
Jeff Pontius, CEO of Corvus Gold Inc. said “The 2014 drill campaign has significantly expanded the size, grade and quality of the Yellowjacket resource. The discovery of several new high-grade veins during the 2014 program and the currently unconstrained nature of the deposit suggest that Yellowjacket as well as other similar and untested zones in the North Bullfrog district have potential to develop into a large new Nevada, high-grade gold-silver District. The knowledge gained in 2014 has formed the foundation for a new District wide exploration program in 2015 to determine the potential of this new multimillion ounce Nevada discovery. In addition over the next few months the results from the 2014 work will be integrated into a new resource statement and our first PEA looking at the high-grade system and its impact on the overall project.”
Geological Results
The Josh Vein intercepts in holes NB-14-410 (2.2 metres of 8.9g/t gold and 450 g/t silver), NB-14-412 (4.5 metres of 1.0 g/t gold and 20 g/t silver, NB-14-414 (11 metres with 8.1 g/t gold and 30 g/t silver) and NB-14-416 (6.6 metres with 0.9 g/t gold and 17 g/t silver) tested the down-dip extensions of the West Vein to a depth of approximately 200 metres.
All of the holes in the southern exploration reported here have encountered significant intervals of disseminated oxide mineralization some of it with grades substantially higher than the average resource (Table 1). New drill roads on the top of Sierra Blanca have produced chip channel sampling (SBRC-15) which shows continuous mineralization with quartz vein stockwork zones carrying grades that are much higher than the average heap leach resource (Figure 1). This mineralization should substantially impact early mine production from the heap leach material.
High Grade Shoots within Josh Vein
The interaction between the Josh Vein and the NE50, NE60 and NE70 fault zones may (Figure 1) be an important control on the development of high-grade shoots within the Josh Vein system and defining the locations and character of these faults represents a big step forward for future targeting of high-grade zones like those defined in hole NB-14-400 (35.9 metres @ 17 g/t gold and 20 g/t silver).
A new target, NE60 that is now emerging as a potential new high-grade discovery was first intersected in early exploration in holes NB-07-02 (4.5 metres of 1.6 g/t gold and 1.1 g/t silver) and RDH-768 (1.5 metres of 1.2 g/t gold and 0.4 g/t silver). Hole NB-14-407 also encountered the mineralized NE60 fault (5.4 metres of 0.83 g/t gold and 2.5 g/t silver), as well as in holes NB-14-419, NB-14-423 and NB-14-420. This new broad zone of structurally (fault zone) hosted gold is similar to the mineralization above the Josh Vein to the north and has developed a potential high-grade target at depth.
The NE70 fault zone target was a conceptual target from geologic modeling and was initially tested in 2014 returning very encouraging results in holes NB-14-417 (7.8 metres of 1.1 g/t gold and 1 g/t silver) and NB-14- 422 (32 metres of 0.61 g/t gold and 1.2 g/t silver). As with the NE60 target these intercepts are from the upper parts of the system with the main high-grade zone projected to be deeper in the system.
Table 1: Significant Intercepts* from Recent Drilling at Yellowjacket
(Reported drill intercepts are not true widths. At this time, there is insufficient data with respect to the shape of the mineralization to calculate its true orientation in space.)
Click here to view the table on our website
*The vein intervals are defined as having >50% quartz infill and stockwork is defined as the interval in the immediate hangingwall and footwall of the vein where overall vein density exceeds 5%. Within the stockwork zones a cutoff of 0.3g/t gold equivalent has been used assuming a 59:1 price ratio of gold to silver. For disseminated oxide zones a cutoff of 0.1g/t gold has been applied.
Exploration Program
Final geological modeling of the Yellowjacket Zone is currently underway and it is anticipated that a new resource will be calculated in the first quarter of 2015. This resource will form the basis of an initial Preliminary Economic Assessment (PEA) that will incorporate the Yellowjacket discovery The PEA is scheduled to be completed in Q2 of 2015. In addition, Corvus is engaged in detailed metallurgical studies of the new high-grade mineralization which have provided encouraging initial results. The North Bullfrog project is also being advanced on a number of development fronts as well as project characterization work ahead of mine permitting.
Figure 1: Location of Phase II drill holes at Yellowjacket. Assays from the holes indicated in fuchsia are reported in Table 1. Black traces are from holes with pending assays. Holes are labeled with last 3 digits of name.
About the North Bullfrog Project, Nevada
Corvus controls 100% of its North Bullfrog Project, which covers approximately 75 km² in southern Nevada. The property package is made up of a number of private mineral leases of patented federal mining claims and 814 federal unpatented mining claims. The project has excellent infrastructure, being adjacent to a major highway and power corridor as well as a large water right.
Based upon a USD 1300 gold price and a silver to gold price ratio of 59:1, the North Bullfrog project currently has estimated mineral resources defined in six deposits: the structurally controlled Yellowjacket milling deposit and the oxidized disseminated heap leach Sierra Blanca, Jolly Jane, Air Track West, Connection and Mayflower deposits. The Yellowjacket vein-style deposit has an Indicated Mineral Resource of 3.69 Mt at an average grade of 1.03 g/t gold and 5.52 g/t silver for 122,000 contained ounces of gold and 654,000 ounces of silver and an Inferred Mineral Resource of 18.40 Mt with an average grade of 0.94 g/t gold and 6.16 g/t silver for 555,000 contained ounces of gold and 3.64M ounces of silver, both at a 0.29 g/t gold cutoff.
The five oxidized disseminated heap leach deposits contain an Indicated Mineral Resource of 25.72 Mt at an average grade of 0.29 g/t gold for 240,000 contained ounces of gold and an Inferred Mineral Resource of 185.99 Mt at 0.19 g/t gold for 1,136,000 contained ounces of gold (both at a 0.13 g/t gold cut-off), with appreciable silver credits.
For full details with respect to the assumptions underlying the current resource estimate detailed herein, please review the Company’s latest NI 43-101 technical report entitled “Technical Report - The North Bullfrog Project, Bullfrog Mining District, Nye County, Nevada” dated April 1, 2014 and available on SEDAR or at the Company’s website www.corvusgold.com.
Qualified Person and Quality Control/Quality Assurance
Jeffrey A. Pontius (CPG 11044), a qualified person as defined by National Instrument 43-101, has supervised the preparation of the scientific and technical information that forms the basis for this news release and has approved the disclosure herein. Mr. Pontius is not independent of Corvus, as he is the CEO and holds common shares and incentive stock options.
Carl E. Brechtel, (Nevada PE 008744 and Registered Member 353000 of SME), a qualified person as defined by National Instrument 43-101, has supervised execution of the work outlined in this news release and has approved the disclosure herein. Mr. Brechtel is not independent of Corvus, as he is the COO and holds common shares and incentive stock options.
The work program at North Bullfrog was designed and supervised by Russell Myers (CPG 11433), President of Corvus, and Mark Reischman, Corvus Nevada Exploration Manager, who are responsible for all aspects of the work, including the quality control/quality assurance program. On-site personnel at the project log and track all samples prior to sealing and shipping. Quality control is monitored by the insertion of blind certified standard reference materials and blanks into each sample shipment. All resource sample shipments are sealed and shipped to ALS Minerals in Reno, Nevada, for preparation and then on to ALS Minerals in Reno, Nevada, or Vancouver, B.C., for assaying. ALS Minerals’s quality system complies with the requirements for the International Standards ISO 9001:2000 and ISO 17025:1999. Analytical accuracy and precision are monitored by the analysis of reagent blanks, reference material and replicate samples. Finally, representative blind duplicate samples are forwarded to ALS Chemex and an ISO compliant third party laboratory for additional quality control.
About Corvus Gold Inc.
Corvus Gold Inc. is a North American gold exploration company, which is focused on advancing its 100% controlled Nevada, North Bullfrog project towards a potential development decision. In addition, the Company controls a number of other North American exploration properties representing a spectrum of gold, silver and copper projects.
On behalf of
Corvus Gold Inc.
(signed) Jeffrey A. Pontius
Jeffrey A. Pontius,
Chief Executive Officer
Contact Information: Ryan Ko
Investor Relations
Email: info@corvusgold.com
Phone: 1-888-770-7488 (toll free) or (604) 638-3246 /Fax: (604) 408-7499 |
