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 Projects Overview
Jerritt Canyon
Overview
SSX Steer Complex
Smith
Recovery Process
Reserves & Resources
Exploration Overview
Exploration History
Jerritt Canyon Operations Technical Report
Jerritt Canyon Map
Project gallery
Ketza River Manto Zone
Ketza Shamrock
Silver Valley Property
Money PropertyYukon-Nevada Gold Corp. 900-688 West Hastings Street Vancouver BC V6B 1P1 Canada Tel: 604.688.9427 Fax: 604.688.9426 Email: nicole@yngc.ca
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 HistoryIn 1972, the first gold was discovered at the Jerritt Canyon District, with the first gold poured on July 4, 1981. Open pit mining occurred between 1981 and 1999. Portal-accessed, underground mining commenced in 1993 with the SSX-Steer Complex and the Smith mine. Since mining began, Jerritt Canyon has produced over 7 million ounces of gold.OperationsNone of the Jerritt Canyon mines exceed 1,000 feet in depth measured from the elevations at their portals. Underground mining uses low-profile 6-cubic-yard load/haul/dump tractors (LHD) loading 35- and 40-ton trucks for ore removal. Ground support typically uses rock bolts and shotcrete, with cemented back-fill in mined-out areas.All underground ore is stacked near the mine portals for grade sampling. It is then transported in 150-ton haul trucks to the mill. Due to the sulfide refractory nature of Jerritt Canyon's ore, the mill feed is dried and roasted and gold is recovered using conventional carbon-in-leach processing. High quality gold doré bars are then shipped for commercial refining and sale. The information provided about Jerritt Canyon on this portion of the Company's website has been reviewed and approved by the Company's Senior Geologist and Qualified Person, Todd Johnson (M.Sc.). SSX - Steer ComplexMining Method
The SSX deposit was discovered in the early 1990s following the structural trends between the Burns Basin and California Mountain deposits. Mining commenced in 1997. The deposit occurs 450 to 1,000 feet below the surface. It has been in the last few years the main gold producer at Jerritt Canyon. The SSX deposit is primarily structurally controlled by a network of northwest (e.g. South Boundary Fault, South Saval Trend), and northeast (e.g. Purple Fault, Saval Fault) structures. The intersection of the northeast and west-northwest structural trends remain a primary target for resource expansion. The westward extension of the South Boundary Dike and the Mahala resource to the east represent exploration opportunities. Gold mineralization in the Steer portion of the SSX- Steer Complex has been identified in an area stretching approximately 3,000 feet east from the old Steer pit to halfway along the connection drift to SSX Zone 5. In the eastern portion of the Steer area, high-grade mineralization is associated with the Husky fault. The intersection of these dikes with the Hansen III unit and the Husky fault and its related structures offer excellent exploration potential. The following tables show 2008 underground exploration drill hole results from the SSX-Steer Complex and the Smith Mine at the Jerritt Canyon property. Don Colli (P.Geo.) former Manager of Mine Geology for Queenstake Resources, compiled and reviewed the aforementioned drill results table that were received before June 30, 2008. Todd Johnson, M.S., Senior Geologist with Yukon-Nevada Gold Corp. and a qualified person as defined by NI 43-101, has reviewed and verified the technical information contained in this table as applicable. The qualified person for the aforementioned data is Todd Johnson (M.S. Geology; M.S. Geological Engineering) who is the current Senior Geologist with Yukon-Nevada Gold Corp. SmithMining Method
The Smith Mine, accessed via a portal from the Dash open pit, was started in 1999 as the pit was being mined out. The Smith Mine complex consists of several mineralized areas that are accessed from the Smith portal, as well as East Dash to the east that will be accessed from a separate portal in the Dash pit. Gold mineralization in the main Smith, Mahala and West Dash deposits is associated with the northeast trending Coulee Fault and west-northwest trending faults and dikes. In Zone 1, high-grade gold mineralization is hosted in the upper and middle portions of the Hansen Creek III unit within a northwest trending horst block between the South Graben fault and the 170 fault. Mineralization in Zones 2 and 3 is directly associated with west-northwest trending dikes. High-grade mineralization occurs within the Hansen Creek II and III units along the steeply dipping dikes. Gold mineralization in the Mahala area is spatially associated with the west-northwest trending Mahala fault and associated dikes and favorable ore-host stratigraphy, including the Hansen Creek Formation and lower beds of the Roberts Mountains Formation. Mineralization at East Mahala occurs primarily in broad, Southeast-dipping lenses in the hanging wall of the Coulee Fault. The West and East Dash deposits occur at the ends of the west-northwest trending Dash Fault system which formed the mineralization mined in the Dash pit. The West Dash deposit occurs at the intersection of the Coulee fault and the west-northwest trending Dash fault. West Dash is accessed through the Smith Portal. The East Dash deposit lies to the east of the Dash pit and will be accessed by a separate portal in the pit. At East Dash, most gold occurs in two lenses parallel to the Dash Fault and dipping to the northeast. The following table shows the 2011 underground exploration drill hole results from the the Smith Mine at the Jerritt Canyon property. Smith Mine 2011 Underground Exploration Diamond Drill Program Data Compiled by William Hofer, Chief Geologist at Jerritt Canyon for Queenstake Resources. The drill results have been reviewed and authorized for release by Todd Johnson, the Qualified Person, as per NI 43-101 guidelines. Recovery ProcessThe mineral processing operation at Jerritt Canyon is one of only three processing plants in Nevada that uses roasting in its treatment of refractory ores. Initially, Jerritt Canyon was designed to process oxide and mildly refractory gold ores. In 1989, the roasting circuit was added to the process for the treatment of highly refractory ores which are now being mined and processed at Jerritt Canyon. The unit operations at the Jerritt Canyon processing plant are comprised of the following circuits:
Reserves & ResourcesSummaryTable 1. JERRITT CANYON MINERAL RESERVES - January 1, 2011 (June 28, 2011 NI 43-101 Technical Report, as amended on January 6, 2012)
The January 1, 2011 reserve in Table 1 was calculated by Mark Odell (P.E.), a consulting Mine Engineer, and Karl Swanson (MAusIMM, SME), Mining Engineer Consultant, under the supervision of Todd Johnson (P.E.), Vice President of Exploration for YNG. These individuals are qualified persons as defined by NI 43-101. Table 2. JERRITT CANYON MEASURED AND INDICATED MINERAL RESOURCES, INCLUDING RESERVES - January 1, 2011 (June 28, 2011 NI 43-101 Technical Report, as amended on January 6, 2012)
Table 3. JERRITT CANYON INFERRED MINERAL RESOURCES - January 1, 2011 (June 28, 2011 NI 43-101 Technical Report, as amended on January 6, 2012)
Maps showing the area locations and the new 0.10 opt gold grade shells that support the January 1, 2011 resources in the main work areas can be seen here: http://www.yukon-nevadagold.com/i/pdf/JCResourceMaps2011.pdf The January 1, 2011 Jerritt Canyon mineral resources (in Tables 2 and 3) were calculated by Karl Swanson, Mining Engineer Consultant, under the supervision of Todd Johnson, Vice President of Exploration for YNG. These individuals are Qualified Persons as defined by National Instrument (NI) 43-101. The mineral reserves and resources have been estimated in accordance with the standards adopted by the Canadian Institute of Mining, Metallurgy and Petroleum ("CIM") Council in August 2000, as amended, and prescribed by the Canadian Securities Administrators' National Instrument 43-101 Standards of Disclosure for Mineral Projects. The resources were classified according to: geological confidence, number of drill holes, number of drill hole samples and a specific search distance. Yukon-Nevada Gold Corp. has filed on www.sedar.com a National Instrument 43-101, a compliant technical report entitled "NI 43-101 Technical Report Update, Yukon-Nevada Gold Corp., Jerritt Canyon Property, Elko County, Nevada, USA," dated June 28, 2011, encompassing the mineral reserves discussed herein, which includes further details with respect to the reserves and resources. That report can be found here: http://www.yukon-nevadagold.com/s/JerrittCanyon.asp?ReportID=195388 Exploration and resource conversion drill hole samples collected from the Jerritt Canyon property are delivered to and analyzed by ALS Laboratory Group in Reno, Nevada using standard fire assay techniques whereas production drill holes are delivered to and analyzed by the Jerritt Canyon Mine assay lab. The Company's 2010 Sampling Methods, and Sample Preparation and Analyses, and Quality Assurance and Quality Control protocols are described in Sections 10 and 11 of the June 28, 2011 Jerritt Canyon Property NI 43-101 Technical Report. Mr. Johnson has verfied the mineral resources and reserves stated above in Tables 1, 2, and 3 and has approved them for use in this presentation. Cautionary Note to U.S. Investors concerning estimates of Measured, Indicated and Inferred ResourcesThis document uses the terms "measured and indicated resources". The Company advises U.S. investors that while these terms are recognized and required by Canadian regulations, the SEC does not recognize them. 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. This document also uses the term "inferred resources". The Company advises U.S. investors that while this term is recognized and required by Canadian regulations, the SEC does not recognize it. "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 or other economic study. U.S. investors are cautioned not to assume that any part or all of an inferred resource exists or is economically or legally minable. Mineral Reserve Terminology: Canadian and U.S. DifferencesThe Company is organized under the laws of British Columbia, Canada. The mineral reserves and resources described here are estimates and have been prepared in compliance with National Instrument 43-101 of the Canadian Securities Administrators. The definitions of proven and probable reserves used in National Instrument 43-101 differ from the definitions in the United States Securities and Exchange Commission ("SEC") Industry Guide 7. Exploration OverviewDistrict Geology The Jerritt Canyon deposits are typical of the Carlin-type deposit of micron to submicron-sized gold particles hosted primarily by carbonaceous, Paleozoic calcareous and sulfidic sedimentary rocks. Lesser amounts of ore are hosted by intermediate to mafic intrusive rock. The deposits often consist of several discrete pods or zones of mineralization whose location is controlled by intersections of major west-northwest and north-northeast structures that cut folded, permeable and chemically favorable host rocks. Locally, intrusive dikes that follow the northwest or northeast structures may be important host rocks. The combination of these structural and stratigraphic controls imparts a highly irregular shape to the ore zones, although most have more horizontal than vertical continuity depending upon the orientation of the host rocks. Gold in the Jerritt Canyon ore deposits occurs as free particles of intergranular, native gold, on or within pyrite, or in association with sedimentary carbonaceous material. Due to the sulfide and carbonaceous affinities, most of the gold deposits at Jerritt Canyon require fine grinding and oxidation to permit the gold particles to be liberated by standard, carbon-in-leach cyanidation. Project Drilling Exploration drilling programs typically consist of reverse circulation (RC) drilling at about 200-foot centers. The spacing is then reduced to about 140 feet and finally, to 100-foot centers or less. Surface core drilling will also augment the drilling programs. At the underground mines, definition drilling usually consists of core drilling on 50-foot centers from underground stations. Underground RC drilling (Cubex) is typically used for resource conversion and is drilled on 20- to 40-foot centers. Tens of thousands of holes have been drilled on the Jerritt Canyon property over the years. The Murray Mine has over 22,000 holes with more than 2 million feet drilled; the Smith mine has over 5,000 holes with more than 1.25 million feet; the SSX mine has nearly 16,000 holes with 2.4 million feet of drilling. The following table shows the 2011 surface exploration drill hole results from the Mahala Project at Jerritt Canyon. The information contained in this news release has been reviewed and approved by the Company's Vice President of Exploration, Todd Johnson, M.Sc. (Qualified Person per the requirements of NI 43-101). The following tables show 2008 surface exploration drill hole results from throughout the Jerritt Canyon property. Todd Johnson, M.S., Senior Geologist with Yukon-Nevada Gold Corp. and a qualified person as defined by NI 43-101, has reviewed and verified the technical information contained in this table as applicable. The qualified person for the aforementioned data is Todd Johnson (M.S. Geology; M.S. Geological Engineering) who is the current Senior Geologist with Yukon-Nevada Gold Corp. Starvation Canyon The discovery of high-grade mineralization at Starvation Canyon has been particularly exciting, as this is the first substantial gold deposit found in the southern part of the district - an area considered to have similar geologic structures as the mines in the northern part. The mineralized zones that host the Starvation Canyon deposit are mostly classified as indicated resources in the December 2007 reserve estimate. The thickness and grade of mineralization are comparable to the mineralization found previously at Jerritt Canyon.  Starvation Canyon is located on private land owned by Queenstake in the southwestern part of the Jerritt Canyon District. The gold mineralized zone at Starvation Canyon lies above the water table in the area of steep topography and could be easily accessed by portal from the hillside. Starvation Canyon drilling has identified a prospective 4 1/2-mile mineralized trend that includes Starvation Canyon and mineralized targets at Waterpipe II and Pie Creek. The northwest structure that appears to be the primary control for the Starvation Canyon resource could hold potential for additional clusters of mineralization both to the northwest and southeast. The following table show the 2011 surface exploration drill hole results from the Starvation Project at Jerritt Canyon. Click here to view this table The information contained in this news release has been reviewed and approved by the Company's Vice President of Exploration, Todd Johnson, M.Sc. (Qualified Person per the requirements of NI 43-101). Exploration HistoryThe Jerritt Canyon district was originally explored by prospectors looking for antimony in the early 1900s. FMC Corporation, exploring for antimony in the 1970s, discovered gold occurrences similar to those in the nearby Carlin trend. In 1976, FMC, then known as Meridian Mining, formed a joint venture with Freeport Minerals to explore and develop the deposits. Mining commenced in 1981 at Jerritt Canyon with the North Generator open pit. Since then, the operators of Jerritt Canyon conducted exploration programs for the identification and development of new mineralized areas. The Jerritt Canyon operation has had a history of exploration and discovery since the 1970s. Historically, most of the exploration efforts were concentrated at and around the existing underground mines in the northern part of the district. Several open pit deposits were discovered, developed and mined during the 1980s and 1990s, including North Generator, Alchem, Marlboro Canyon, Burns, Steer, Saval and Dash. Underground targets were also identified, and the first to be exploited was the West Generator underground deposit in 1993. The MCE, Smith and Steer deposits were more recent discoveries. The million-ounce Murray Mine unexpectedly was discovered by drilling an area being prepared for surface support facilities. The SSX deposit was discovered in the early 1990s by geologists following the structural trends between Burns Basin and California Mountain open pits. The SSX Mine produced its millionth ounce of gold in 2005, becoming the fifth millionth-ounce mine at Jerritt Canyon. The first gold reserves from the Starvation Canyon project and Mahala Basin were delineated in 2005 and added to in 2006 and 2007. Additional drill holes targeting previously identified indicated resources at West Mahala, as identified in the 2008 43-101 report, and other mineralization at the Mahala Basin are warranted in the future. The resources at West Mahala lie within 900 to 2900 feet to the existing underground development at the SSX-Steer Complex. Exploration opportunities are plentiful throughout the entire Mahala Basin area as evidenced from the 2007 and 2008 exploration drilling results. Exploration drilling recommenced at Smith Mine as of June 12, 2010 and is continuing today. A 130,000 foot surface drilling program was completed in 2011 that tested projects throughout the property. Modelling of the recently aquired drill hole data is in progress to update the mineral and resources of the district. Jerritt Canyon Operations Technical ReportJune 28, 2011, as amended on January 6, 2012
Download the Technical Report | Click Here [PDF 14.3 MB]
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©2007 Yukon-Nevada Gold Corp.