The Prospector News

Excelsior Mining Announces Interim Assay Results from the JCM Infill Drill Program

You have opened a direct link to the current edition PDF

Open PDF Close
Uncategorized

Share this news article

Excelsior Mining Announces Interim Assay Results from the JCM Infill Drill Program

 

 

 

 

 

Excelsior Mining Corp. (TSX: MIN) (PFSE: 3XS) (OTCQX: EXMGF) is pleased to announce additional assay results from the infill drill program on the Johnson Camp mine pits located in Cochise County, southeastern Arizona and provide an operations update.

 

Drill Program

 

Due to successful drilling in the NE corner of Burro pit, additional holes were added and those with assays returned are reported below. The improved results will allow the Company to develop a mine plan that focusses on this new, higher-grade, mineralized zone. Permitting of the new leach pad to restart operations is in progress, however the additional drilling and metallurgical testing will push the Company’s goal of restarting mining operations at JCM into 2023.

 

“The recent infill drill results from the Burro pit are better than expected compared to existing data. Zones of significant thickness and grade have been intersected.  We look forward to getting all the results back, completing the geological and resource interpretations and design optimization, with our goal of restarting the JCM open pits as soon as possible,” commented Roland Goodgame, Senior Vice President Business Development.

 

The drilling program is now completed with a total of 43 diamond holes being drilled. Six holes are still awaiting assays. Sequential copper assays for the remaining 37 holes have an average leaching potential exceeding 68% (excludes intervals that contain sulfide mineralization). Assay highlights are included in Table 1 below. Full assays are included in Table 2.

 

Table 1

 

Hole ID From (Ft) To (Ft) Interval (Ft) True Thickness (Ft) TCu% Type Avg. Leaching Potential %
EBD-21 170 187 17 13.0 2.05 S&T 27 %
EBD-22 325 573 248 190.0 0.34 O&T 74 %
EBD-24 223 638 415 383.9 0.42 O&T&S 69 %
EBD-25 247 733 486 486.0 0.42 O&T 74 %
EBD-26 176.5 182 5.5 4.2 4.03 S 11 %
EBD-27 160 550 390 372.5 0.4 O&T 70 %
EBD-33 410 600 190 145.5 0.53 O&T 89 %
EBD-34 395 600 205 157.0 0.36 O&T 77 %
EBD-35 397 547 150 114.9 0.42 T 91 %
Mineralized Zone: O = Oxide, T = Transition, S = Sulfide.  TCu% = Total Copper %

 

The leaching potential of copper mineralization is defined as acid soluble copper plus sodium cyanide soluble copper divided by total copper.

 

All samples are prepared from manually split or sawn PQ or HQ core sections on site in Arizona. Drill core samples are then sent to Skyline Assayers & Laboratories in Tucson, Arizona for Total Copper and Sequential Copper analyses. Standards, blanks, and duplicate assays are included at regular intervals in each sample batch submitted from the field as part of an ongoing Quality Assurance/Quality Control Program. Pulps and sample rejects are stored by Excelsior for future reference.

 

Table 2

 

Hole ID From (Ft) To (Ft) Interval (Ft) True Thickness (Ft) TCu% Type Avg. Leaching Potential %
EBD-09 15 25 10 7.7 0.12 O 92 %
75 175 100 76.6 0.22 O&S 41 %
EBD-17 128 158 30 23.0 0.16 T&S 31 %
208 330 122 93.5 0.3 S&T&O 27 %
EBD-18 80 90 10 9.9 0.25 O 92 %
160 290 130 128.1 0.28 T&S 61 %
EBD-19 0 80 80 61.3 0.24 O 71 %
80 150 70 53.6 0.24 O&S 29 %
EBD-20 190 230 40 30.6 0.57 S 14 %
250 260 10 7.7 0.19 T&S 42 %
270 290 20 15.3 0.16 O 75 %
EBD-21 40 130 90 68.9 0.2 O 70 %
170 187 17 13.0 2.05 S&T 27 %
EBD-22 30 110 80 61.3 0.33 O 73 %
130 204 74 56.7 0.36 O&T 58 %
244 254 10 7.7 0.21 T 48 %
264 274 10 7.7 0.13 O&T 77 %
284 295 11 8.4 0.18 O&T 89 %
325 573 248 190.0 0.34 O&T 74 %
EBD-24 55 65 10 9.3 0.17 O 76 %
115 183 68 62.9 0.18 O 72 %
223 638 415 383.9 0.42 O&T&S 69 %
EBD-25 113 133 20 20.0 0.22 O 84 %
167 177 10 10.0 0.17 O 84 %
247 733 486 486.0 0.42 O&T 74 %
EBD-26 90 100 10 7.7 0.16 O 94 %
120 130 10 7.7 0.24 O 88 %
176.5 182 5.5 4.2 4.03 S 11 %
190 200 10 7.7 0.66 O&T 77 %
230 283.5 53.5 41.0 0.24 O 75 %
EBD-27 20 80 60 57.3 0.63 O 95 %
160 550 390 372.5 0.4 O&T 70 %
EBD-29 110 120 10 7.7 0.17 O 82 %
147 210 63 48.3 0.36 O 56 %
240 280 40 30.6 0.21 T 71 %
EBD-31 40 100 60 46.0 0.4 O 50 %
140 170 30 23.0 0.28 O 54 %
EBD-32 30 50 20 20.0 0.28 O 85 %
68 78 10 10.0 0.17 O 88 %
98 108 10 10.0 0.46 O 63 %
128 138 10 10.0 0.18 O 63 %
158 173 15 15.0 0.24 O 79 %
EBD-32A 24 44 20 20.0 0.34 O 85 %
94 104 10 10.0 0.18 O 61 %
124 162 38 38.0 0.43 O 44 %
EBD-33 60 70 10 7.7 0.42 O 95 %
100 110 10 7.7 0.12 O 97 %
200 235 35 26.8 0.39 O 59 %
255 265 10 7.7 0.38 O 28 %
275 285 10 7.7 0.68 O 76 %
295 325 30 23.0 0.33 O 62 %
345 355 10 7.7 0.2 O&T 61 %
385 402 17 13.0 0.56 O 59 %
410 600 190 145.5 0.53 O&T 89 %
EBD-34 130 140 10 7.7 0.37 O 83 %
150 165.5 15.5 11.9 0.45 O 71 %
305 325 20 15.3 0.37 O 42 %
395 600 205 157.0 0.36 O&T 77 %
EBD-35 35 45 10 7.7 0.14 O 76 %
295 315 20 15.3 0.32 O&T 37 %
397 547 150 114.9 0.42 T 91 %
EBD-36 13 30 17 13.0 0.63 O 90 %
76 90 14 10.7 0.65 O 46 %
100 120 20 15.3 0.32 O 39 %
140 150 10 7.7 0.46 O 40 %
160 170 10 7.7 0.32 O 68 %
250 260 10 7.7 0.17 O&T 72 %
336 350 14 10.7 0.19 O&T 74 %
EBD-37 10 190 180 137.9 0.27 O&T 78 %
Mineralized Zone: O = Oxide, T = Transition, S = Sulfide.

 

The Johnson Camp Mine has historically been an open pit, heap leach operation since Cyprus Minerals opened the property in the 1970’s. The operation includes two open pits, a two-stage crushing-agglomerating circuit, a fully functioning SX-EW plant capable of producing 25 million pounds of cathode copper per year, a complete set of PLS and raffinate ponds, and full infrastructure (ancillary facilities, access, power, water, and communications).

 

Operations Update

 

Excelsior is also providing an update on operations and future plans. Excelsior’s near-term focus is on the following:

  • Continuing to evaluate the recent drill results and development of a mine plan for Johnson Camp that targets the higher-grade section to maximize cashflows at the start of operations. As noted above, permitting of the new leach pad to restart operations is in progress and the Company’s goal is to restart mining operations at JCM in 2023 assuming mine planning demonstrates an economic operation.
  • Continuing to investigate the key recommendations from the March 2022 Gunnison project Pre-feasibility Study Update (“PFS”), including conducting experimentation to ensure that neutralized raffinate is effective in dissolving CO2 in the subsurface and evaluating a scope of work and bid package to select a water treatment vendor to design the water treatment system. Selection criteria will be focused on rapid, low-cost solutions to demonstrate that the technology is effective in solving the wellfield challenges.
  • Planning for well stimulation trials to be undertaken to determine if the technique(s) have the potential to alleviate or solve CO2 blocking, improve connectiveness, and increase flow rates and sweep efficiency. The results of well stimulation have the potential to reduce the need for raffinate neutralization or change the design criteria for the neutralization plant, which could result in significant cost savings.
  • The Cochise Mining District (Johnson Camp Mine area) has enjoyed a long history of underground and open pit operations (Cu, Zn, Pb and Ag), with little sophisticated analysis of the development potential of the entire camp. Excelsior intends to undertake a more comprehensive evaluation of the oxide and sulfide potential of its mineral resource and mining assets.
  • Whilst water flushing activities in the wellfield continue to show flow improvements on individual wells, the Company will still need to implement the solutions from the PFS to remediate the entire wellfield. Therefore, in order to conserve cash and maintain a robust balance sheet, Excelsior is reducing its workforce and putting the wellfield on reduced operation by temporarily stopping acid injection whilst continuing recovery and compliance to ensure underground solutions are managed and controlled. Wellfield operations are not currently cashflow positive, and these initiatives will provide additional cash and management bandwidth to focus on the key priorities listed above.

 

QUALIFIED PERSON

 

Excelsior’s exploration work on the Johnson Camp mine is supervised by Stephen Twyerould, Fellow of AUSIMM, President and CEO of Excelsior and a Qualified Person as defined by NI 43-101. Mr. Twyerould has reviewed and is responsible for the technical information contained in this news release. Mr. Twyerould has verified the data disclosed in this news release, including sampling, analytical and test data underlying the information disclosed in this news release. Mr. Twyerould has verified that the results were accurate from the official assay certificates provided to Excelsior.

 

ABOUT EXCELSIOR MINING

 

Excelsior “The Copper Solution Company” is a mineral exploration and production company that owns and operates the Gunnison Copper Project in Cochise County, Arizona. The project is a low cost, environmentally friendly in-situ recovery copper extraction project that is permitted to 125 million pounds per year of copper cathode production. Excelsior also owns the past producing Johnson Camp Mine and a portfolio of exploration projects, including the Peabody Sill and the Strong and Harris deposits.

 

Posted June 23, 2022

Share this news article

MORE or "UNCATEGORIZED"


Montage Closes $20 Million Private Placement of Subscription Receipts

Montage Gold Corp.  (TSX-V: MAU) is pleased to announce the clos... READ MORE

June 30, 2022

Cornish Metals Reports Drilling From the Trenares Target, United Downs Project, Cornwall, UK

Cornish Metals Inc. (TSX-V:CUSN) (AIM: CUSN) a dual-listed compan... READ MORE

June 30, 2022

Kodiak Reports Infill Drilling from Southern Gate Zone: 0.44% CuEq Over 114 m, within 0.28% CuEq Over 501 m

Kodiak Copper Corp. (TSX-V: KDK) (OTCQB: KDKCF) (Frankfurt: 5DD1)... READ MORE

June 30, 2022

NOVAGOLD Reports Second Quarter 2022 Financial Results

Donlin Gold’s Largest Drill Program in Over 10 Years Advancing... READ MORE

June 30, 2022

NEVADA SUNRISE CLOSES $1,500,000 PRIVATE PLACEMENT

Nevada Sunrise Gold Corporation (TSX-V: NEV) (OTC: NVSGF) announc... READ MORE

June 30, 2022

We acknowledge the [financial] support of the Government of Canada.

Government of Canada Supported
Copyright 2022 The Prospector News