Pershing Gold Announces Positive Preliminary Feasibility Study for Relief Canyon
http://ir.stockpr.com/pershinggold/press-releases/detail/848
http://content.equisolve.net/pershinggold/new...ry_848.pdf
LAKEWOOD, Colo., June 5, 2017 /PRNewswire/ -- Pershing Gold Corporation (NASDAQ
GLC) (TSX GLC) (FWB:7PG1) ("Pershing Gold" or the "Company"
, the emerging Nevada gold producer, today announces the completion of a NI 43-101 compliant resource and Preliminary Feasibility Study ("PFS" on its Relief Canyon Mine in Pershing County, Nevada.
Mine Development Associates ("MDA" , Kappes Cassidy & Associates, of Reno, NV and Jorgensen Engineering and Technical Services, of Centennial, CO, completed the PFS for the Company's Relief Canyon gold mine with an effective date of May 26, 2017. The positive PFS by MDA recommends that Pershing Gold advance the Relief Canyon Project to a production decision. Highlights from the PFS include a pre-tax net present value ("NPV" of $144.6 million, an internal rate of return ("IRR" of 89% and Net Cash Flow of $192.7 million. This NPV, IRR and Net Cash Flow assume pre-tax economics using $1,250 per ounce ("/oz" of gold ("Au" , $16.75/oz of silver ("Ag" and a 5% discount rate. Further highlights from the PFS are listed below in Table 1 (showing updates to the Preliminary Economic Assessment ("PEA" the Company announced on June 24, 2016), and PFS gold price sensitivities are listed below in Table 2.
"The PFS is a major milestone for Pershing Gold. We announced an upgraded mineral resource that includes proven and probable reserves of approximately 635,000 ounces of gold and 1.6 million ounces of silver," stated Stephen D. Alfers, Pershing Gold's Chairman and CEO. "The PFS is based on a mine plan and financial model with an annual average production of over 90,000 ounces of gold per year over a mine life of approximately six years. The Relief Canyon deposit remains open in three directions, presenting the opportunity for continued expansion and extension of this mine," Alfers explained.
*The PEA evaluated the economics of two alternative mining scenarios: self-mining by the Company with its own manpower and equipment, and mining through mine contractors who supply the manpower and equipment to deliver material to the Company's processing facilities. The results shown are based on the contractor mining estimates.
"The Company will be reviewing various options to cover future capital needs, including debt, royalty or stream financing, gold off-take agreements, investment from strategic investors, or combinations of those approaches," said Alfers.
"Pershing Gold thanks MDA, its staff, and its associated engineering and metallurgical groups assisting in the development of this PFS. The quality of the work and effort put into this study is apparent in the excellent report they have produced," stated Alfers.
Operating Cost and CAPEX
The favorable economics of Relief Canyon are reinforced throughout the PFS. The PFS indicates the viability of contract-mining and conveyor stacking to bring the project into production. Under the PFS, 525,790 oz Au are expected to be produced with average life of mine ("LOM" production of 93,900 oz Au/year over the 5.6 year LOM. The PFS highlights the low cost nature of this project with an average cash cost of $770/oz Au and All in Sustaining Cost ("AISC" of $802/oz Au. The modest capital expense ("CAPEX" nature of this project is reaffirmed with the PFS Initial CAPEX of $23.6 million.
The full PFS will be posted within the next 45 days on the Company's website at:
http://www.pershinggold.com/relief-canyon/technical-reports.
Mineral Reserve and Resource Estimate
The PFS also allows for the categorization of approximately 80% of the gold ounces and 73% of the tons within the NI 43-101 measured and indicated resource at Relief Canyon as proven and probable reserves (Table 3). This conversion percentage from resource to reserve highlights the quality and quantity of work in 2016 to upgrade the Relief Canyon deposit. To date more than 1,100 holes and approximately 500,000 feet of drilling have been completed at Relief Canyon. This includes 430 core holes and nearly 290,000 feet of drilling completed by Pershing Gold.
This PFS has calculated Proven and Probable reserves for the deposit based on the estimated resources that have an effective date of November 1, 2016. A designed PFS three-phase pit contains the Measured and Indicated material shown in Table 3, which constitute the reserves for the property using a gold price of $1,250 per ounce, a cutoff grade of 0.005 ounces per ton ("opt" Au, and the detailed mine economics outlined in the PFS. In addition, a silver reserve grade can be reported for a portion of the deposit shown in Table 4 below.
The Mineral Reserves have an effective date of May 26, 2017. The Proven and Probable reserves are contained in the designed PFS final pit and include only oxide materials. The Measured and Indicated oxide resources are inclusive of the estimated PFS reserves.
The mineral resources at Relief Canyon were modeled and estimated by evaluating the drill data statistically, utilizing the geologic interpretations provided by Pershing Gold to interpret mineral domains on cross sections spaced at 50-foot intervals, rectifying the mineral-domain interpretations on long sections spaced at 10-foot intervals, analyzing the modeled mineralization geostatistically to establish estimation parameters, and estimating grades into a three-dimensional block model.
The Relief Canyon gold mineral resource is listed in Table 5 using a cutoff grade of 0.005 opt Au for oxide material, 0.01 opt Au for mixed material, and 0.02 opt Au for sulfide material. The oxide and mixed cutoffs were chosen to capture mineralization potentially available to open-pit extraction and heap-leach processing, with the higher cutoff for mixed material reflecting the expected reduction in recovered gold. The sulfide cut-off was chosen to reflect the potentially higher costs associated with sulfide processing. The effective date of the mineral resources estimate is November 1, 2016, and these Measured and Indicated resources are inclusive of the estimated PFS reserves.
Metallurgical Testing
Additional metallurgical testing incorporated into the PFS resulted in average gold recovery rates of approximately 83% on crushed and agglomerated material, an improvement from the recovery rate of 80% identified in the PEA. The Relief Canyon ore deposit contains an oxidized and partially oxidized gold mineral resources and reserves that metallurgical testing and historical mining experience indicate are amenable to cyanide heap-leach processing. In 2015 and 2016, Pershing Gold conducted metallurgical test work on drill core and bulk samples to confirm heap-leach processing on additional resources and reserves that have been identified within the existing pit. The metallurgical test work was based on identifying three distinct zones on cross-section identified as the Main, Lower, and Jasperoid zones.
Results from column leach testing demonstrate that the major Relief Canyon ore types (limestone breccia, clay matrix breccia, and jasperoid) contained in the Main Zone, as well as the Jasperoid and Lower Zones, generally would be amenable to heap-leach cyanidation treatment.
The column-leach and permeability tests indicate that agglomeration is required in order to achieve hydraulic conductivity and a corresponding gold recovery on a consistent basis. There is also evidence that blending of low and high fines content material will aid hydraulic conductivity.
The planned processing method is heap-leach cyanidation of primary crushed ore (80% passing three inch) that has been agglomerated using eight pounds per ton of cement as a binder.
Permitting
Currently, Pershing Gold has all of the state and federal permits necessary to start the Phase I mining and heap-leach processing operations. Pershing Gold is planning a two-phase permitting and development scenario for the project. Phase I, which has been approved, is the re-purposing of previously approved disturbance for expanded mining to a pit bottom elevation of 5,080 feet, partial backfilling of the Phase I pit to approximately 20 feet above the historical groundwater elevation to eliminate a pit lake, expanded exploration operations, full build-out of the heap leach pad to accommodate leaching of the Phase I ore, and construction of a new waste rock storage facility. Phase II will include additional mine expansion activities and allow mining further below the water table. Pershing Gold will use the mine plan in the PFS as the basis for the Phase II permit application, and anticipates it will submit the Phase II permit applications in the second half of 2017.
Opportunities
Resource growth opportunities remain available through additional exploration and/or development drilling. The deposit is open to the west, and offers opportunity for growth. Additional opportunities could include:
Converting inferred resource tons to measured and indicated resource or proven and probable reserves
Utilizing historic low-grade stockpile
Expanding and/or demonstrating continuity of the high-grade gold grade shells
Expanding on the 2016 Phase 2 drilling that identified new zones of mineralization southeast of the Lightbulb Pit, with potential to elevate these zones of mineralization to a mineral resource status
Increasing silver credit
Greenfields exploration activity has taken place over approximately 20% of the 40 square miles of Pershing Gold's land package. It has already identified growth opportunities including the Blackjack Project, which is a potential satellite deposit southeast of the Relief Canyon Mine. Drilling is currently in progress at Blackjack.
About Pershing Gold Corporation
Pershing Gold is an emerging gold producer whose primary asset is the Relief Canyon Mine in Pershing County, Nevada. Relief Canyon includes three historic open-pit mines and a state-of-the-art, fully permitted and constructed heap-leach processing facility. Pershing Gold is currently permitted to resume mining at Relief Canyon under the existing Plan of Operations.
Pershing Gold's landholdings cover approximately 25,000 acres that include the Relief Canyon Mine asset and lands surrounding the mine in all directions. This land package provides Pershing Gold with the opportunity to expand the Relief Canyon Mine deposit and to explore and make new discoveries on nearby lands.
Pershing Gold is listed on the NASDAQ Global Market and the Toronto Stock Exchange under the symbol PGLC and on the Frankfurt Stock Exchange under the symbol 7PG1.
http://ir.stockpr.com/pershinggold/press-releases/detail/848
http://content.equisolve.net/pershinggold/new...ry_848.pdf
LAKEWOOD, Colo., June 5, 2017 /PRNewswire/ -- Pershing Gold Corporation (NASDAQ
GLC) (TSX GLC) (FWB:7PG1) ("Pershing Gold" or the "Company" , the emerging Nevada gold producer, today announces the completion of a NI 43-101 compliant resource and Preliminary Feasibility Study ("PFS" on its Relief Canyon Mine in Pershing County, Nevada. Mine Development Associates ("MDA"
, Kappes Cassidy & Associates, of Reno, NV and Jorgensen Engineering and Technical Services, of Centennial, CO, completed the PFS for the Company's Relief Canyon gold mine with an effective date of May 26, 2017. The positive PFS by MDA recommends that Pershing Gold advance the Relief Canyon Project to a production decision. Highlights from the PFS include a pre-tax net present value ("NPV" of $144.6 million, an internal rate of return ("IRR" of 89% and Net Cash Flow of $192.7 million. This NPV, IRR and Net Cash Flow assume pre-tax economics using $1,250 per ounce ("/oz" of gold ("Au" , $16.75/oz of silver ("Ag" and a 5% discount rate. Further highlights from the PFS are listed below in Table 1 (showing updates to the Preliminary Economic Assessment ("PEA" the Company announced on June 24, 2016), and PFS gold price sensitivities are listed below in Table 2. "The PFS is a major milestone for Pershing Gold. We announced an upgraded mineral resource that includes proven and probable reserves of approximately 635,000 ounces of gold and 1.6 million ounces of silver," stated Stephen D. Alfers, Pershing Gold's Chairman and CEO. "The PFS is based on a mine plan and financial model with an annual average production of over 90,000 ounces of gold per year over a mine life of approximately six years. The Relief Canyon deposit remains open in three directions, presenting the opportunity for continued expansion and extension of this mine," Alfers explained.
*The PEA evaluated the economics of two alternative mining scenarios: self-mining by the Company with its own manpower and equipment, and mining through mine contractors who supply the manpower and equipment to deliver material to the Company's processing facilities. The results shown are based on the contractor mining estimates.
"The Company will be reviewing various options to cover future capital needs, including debt, royalty or stream financing, gold off-take agreements, investment from strategic investors, or combinations of those approaches," said Alfers.
"Pershing Gold thanks MDA, its staff, and its associated engineering and metallurgical groups assisting in the development of this PFS. The quality of the work and effort put into this study is apparent in the excellent report they have produced," stated Alfers.
Operating Cost and CAPEX
The favorable economics of Relief Canyon are reinforced throughout the PFS. The PFS indicates the viability of contract-mining and conveyor stacking to bring the project into production. Under the PFS, 525,790 oz Au are expected to be produced with average life of mine ("LOM"
production of 93,900 oz Au/year over the 5.6 year LOM. The PFS highlights the low cost nature of this project with an average cash cost of $770/oz Au and All in Sustaining Cost ("AISC" of $802/oz Au. The modest capital expense ("CAPEX" nature of this project is reaffirmed with the PFS Initial CAPEX of $23.6 million. The full PFS will be posted within the next 45 days on the Company's website at:
http://www.pershinggold.com/relief-canyon/technical-reports.
Mineral Reserve and Resource Estimate
The PFS also allows for the categorization of approximately 80% of the gold ounces and 73% of the tons within the NI 43-101 measured and indicated resource at Relief Canyon as proven and probable reserves (Table 3). This conversion percentage from resource to reserve highlights the quality and quantity of work in 2016 to upgrade the Relief Canyon deposit. To date more than 1,100 holes and approximately 500,000 feet of drilling have been completed at Relief Canyon. This includes 430 core holes and nearly 290,000 feet of drilling completed by Pershing Gold.
This PFS has calculated Proven and Probable reserves for the deposit based on the estimated resources that have an effective date of November 1, 2016. A designed PFS three-phase pit contains the Measured and Indicated material shown in Table 3, which constitute the reserves for the property using a gold price of $1,250 per ounce, a cutoff grade of 0.005 ounces per ton ("opt"
Au, and the detailed mine economics outlined in the PFS. In addition, a silver reserve grade can be reported for a portion of the deposit shown in Table 4 below. The Mineral Reserves have an effective date of May 26, 2017. The Proven and Probable reserves are contained in the designed PFS final pit and include only oxide materials. The Measured and Indicated oxide resources are inclusive of the estimated PFS reserves.
The mineral resources at Relief Canyon were modeled and estimated by evaluating the drill data statistically, utilizing the geologic interpretations provided by Pershing Gold to interpret mineral domains on cross sections spaced at 50-foot intervals, rectifying the mineral-domain interpretations on long sections spaced at 10-foot intervals, analyzing the modeled mineralization geostatistically to establish estimation parameters, and estimating grades into a three-dimensional block model.
The Relief Canyon gold mineral resource is listed in Table 5 using a cutoff grade of 0.005 opt Au for oxide material, 0.01 opt Au for mixed material, and 0.02 opt Au for sulfide material. The oxide and mixed cutoffs were chosen to capture mineralization potentially available to open-pit extraction and heap-leach processing, with the higher cutoff for mixed material reflecting the expected reduction in recovered gold. The sulfide cut-off was chosen to reflect the potentially higher costs associated with sulfide processing. The effective date of the mineral resources estimate is November 1, 2016, and these Measured and Indicated resources are inclusive of the estimated PFS reserves.
Metallurgical Testing
Additional metallurgical testing incorporated into the PFS resulted in average gold recovery rates of approximately 83% on crushed and agglomerated material, an improvement from the recovery rate of 80% identified in the PEA. The Relief Canyon ore deposit contains an oxidized and partially oxidized gold mineral resources and reserves that metallurgical testing and historical mining experience indicate are amenable to cyanide heap-leach processing. In 2015 and 2016, Pershing Gold conducted metallurgical test work on drill core and bulk samples to confirm heap-leach processing on additional resources and reserves that have been identified within the existing pit. The metallurgical test work was based on identifying three distinct zones on cross-section identified as the Main, Lower, and Jasperoid zones.
Results from column leach testing demonstrate that the major Relief Canyon ore types (limestone breccia, clay matrix breccia, and jasperoid) contained in the Main Zone, as well as the Jasperoid and Lower Zones, generally would be amenable to heap-leach cyanidation treatment.
The column-leach and permeability tests indicate that agglomeration is required in order to achieve hydraulic conductivity and a corresponding gold recovery on a consistent basis. There is also evidence that blending of low and high fines content material will aid hydraulic conductivity.
The planned processing method is heap-leach cyanidation of primary crushed ore (80% passing three inch) that has been agglomerated using eight pounds per ton of cement as a binder.
Permitting
Currently, Pershing Gold has all of the state and federal permits necessary to start the Phase I mining and heap-leach processing operations. Pershing Gold is planning a two-phase permitting and development scenario for the project. Phase I, which has been approved, is the re-purposing of previously approved disturbance for expanded mining to a pit bottom elevation of 5,080 feet, partial backfilling of the Phase I pit to approximately 20 feet above the historical groundwater elevation to eliminate a pit lake, expanded exploration operations, full build-out of the heap leach pad to accommodate leaching of the Phase I ore, and construction of a new waste rock storage facility. Phase II will include additional mine expansion activities and allow mining further below the water table. Pershing Gold will use the mine plan in the PFS as the basis for the Phase II permit application, and anticipates it will submit the Phase II permit applications in the second half of 2017.
Opportunities
Resource growth opportunities remain available through additional exploration and/or development drilling. The deposit is open to the west, and offers opportunity for growth. Additional opportunities could include:
Converting inferred resource tons to measured and indicated resource or proven and probable reserves
Utilizing historic low-grade stockpile
Expanding and/or demonstrating continuity of the high-grade gold grade shells
Expanding on the 2016 Phase 2 drilling that identified new zones of mineralization southeast of the Lightbulb Pit, with potential to elevate these zones of mineralization to a mineral resource status
Increasing silver credit
Greenfields exploration activity has taken place over approximately 20% of the 40 square miles of Pershing Gold's land package. It has already identified growth opportunities including the Blackjack Project, which is a potential satellite deposit southeast of the Relief Canyon Mine. Drilling is currently in progress at Blackjack.
About Pershing Gold Corporation
Pershing Gold is an emerging gold producer whose primary asset is the Relief Canyon Mine in Pershing County, Nevada. Relief Canyon includes three historic open-pit mines and a state-of-the-art, fully permitted and constructed heap-leach processing facility. Pershing Gold is currently permitted to resume mining at Relief Canyon under the existing Plan of Operations.
Pershing Gold's landholdings cover approximately 25,000 acres that include the Relief Canyon Mine asset and lands surrounding the mine in all directions. This land package provides Pershing Gold with the opportunity to expand the Relief Canyon Mine deposit and to explore and make new discoveries on nearby lands.
Pershing Gold is listed on the NASDAQ Global Market and the Toronto Stock Exchange under the symbol PGLC and on the Frankfurt Stock Exchange under the symbol 7PG1.
