Source - LSE Regulatory
RNS Number : 1432G
Phoenix Copper Limited
17 July 2023

Phoenix Copper Limited / Ticker: PXC / Sector: Mining 

 17 July 2023


Phoenix Copper Limited

("Phoenix" or the "Company")

Navarre Creek Drilling Programme 

First Drill Programme at the Navarre Creek Project is now Underway


Phoenix Copper Ltd (AIM: PXC, OTCQX: PXCLF), the AIM quoted USA focused base and precious metals emerging producer and exploration company, is pleased to announce that the Company's 2023 drilling programme is now underway at the Navarre Creek exploration project in Custer County, Idaho.

The 2023 drilling programme marks a new phase of work on the gold exploration project located approximately five kilometres ('km') west of the Company's Empire Mine copper oxide deposit.

The 2023 Navarre Creek drilling programme is scheduled to comprise up to 60 reverse-circulation ('RC') drill holes from 30 drill pads ("Drill Programme") located at targets throughout the Navarre Creek claim block.

The programme is expected to build on the Company's current understanding of the area from previous exploration activities including geologic mapping, surface geochemistry, airborne hyperspectral mineral imaging, and geomagnetic ground surveys.

Ryan McDermott, Chief Executive Officer, said: "Based on our team's exploration work up to this point, the results of the fieldwork conducted at Navarre Creek are extremely prospective. The area exhibits geological traits consistent with hydrothermal precious metal deposition common in volcanic terrains in the Western United States. These geological characteristics, along with the area's hydrothermally altered brecciated sedimentary units, make Navarre Creek a primary target for precious metal exploration. As always, I look forward to reporting assay results as soon as they are available.

Background on Navarre Creek

During the 2021 field season, Phoenix contracted Magee Geophysical Services to acquire approximately 169 line-km of total field magnetic measurements at the Company's Navarre Creek project and SpecTIR, LLC of Reno, Nevada to complete an airborne hyperspectral survey of the same Navarre Creek area to identify prospective exploration targets in an area, many of which are largely concealed by glacial till.

The ground magnetics survey looked specifically for magnetite and magnetic-bearing minerals, some of which have been identified in limited outcroppings, while the hyperspectral imaging helps to identify alteration minerals often associated with precious metal deposition.

Hyperspectral imaging incorporates a small airplane with mounted infrared lights and sensors to detect a wide range of wavelengths, mineral absorption and reflectance within the target area. The wavelength data collected in this survey are VNIR (Visible and Near-Infrared), SWIR (Short-Wave Infrared), and LWIR (Long-Wave Infrared). The human eye can detect wavelengths (colours) from 390 nanometers ('nm') to 700nm. The VNIR and SWIR sensors collected wavelength data from 390nm to 2,450nm, while the LWIR sensors ranged from 8,000nm to 12,000nm.

The Navarre Creek project is located within an intrusive dome complex, where the magnetic components in overlying volcanic lithologies are destroyed by silicic alteration associated with steam-heated, acidic, and oxidised hydrothermal fluids. The survey highlighted several such areas including the Lehman Creek fault, one or more porphyry plugs, and several contacts/faults.

The survey identified volcanic associated alteration that is both acidic and of fairly high temperature as evidenced by pyrophyllite and dickite. As would be expected in the Challis Volcanic Field, the white mica is Al-rich (paragenetic) and also shows zoned crystallinity patterns, typical of intermediate-to-high sulfidation systems and is likely proximal to a magmatic heat source. The presence of iron oxide associated with some of these zones adds prospectivity. The alteration pattern is useful in developing an exploration model to optimise future drill targets.

During the summer of 2020, Konnex Resources' exploration team previously mapped and sampled the Company's Navarre Creek gold property, which was then comprised of 2,420 acres of unpatented mining claims, located approximately 5km north-northwest of the Empire Mine.  90 rock chip and grab samples were collected in the hydrothermally altered volcanic rocks that make up the Navarre Creek claims and sent to ALS Laboratories in Reno, USA for geochemical analysis.

Of the 90 samples, 53 were above the detection limit for gold with a high of 0.569 grammes per tonne ('g/t'), and 25 above the detection limit for silver.  There was also a strong correlation between elevated gold values and elevated antimony values, typical of epithermal gold and silver systems in the western US.  With the exception of one sample, all samples with a gold value greater than 0.1 g/t occurred within the same alteration type, that being predominantly a jasperoid-hosted quartz stockwork and micro-veining system. This provides valuable information for future sampling and drill targeting.  The quartz stockworking and micro-veining appear to occur predominantly in felsic volcanic tuff units in the Navarre Creek area.  One anomalous sample, 32519, registered a gold value of 0.387 g/t, in a magnetite skarn sample located on the southern end of the Navarre Creek claim block where the skarn body is exposed as subcrop through the surface volcanics tuffs. Additionally, the presence of limestone in surface float near the skarn sample location is evidence that the Paleozoic sedimentary rocks that occur at the Empire Mine may be near the surface.  The Empire orebody is partly comprised of a magnetite skarn body hosted in Paleozoic limestone.   It was also noted that volcanic outcropping across the Navarre Creek area is strongly weathered and highly leached to depths of two to four metres.

The Navarre Creek claim block now covers 3,577 acres (14.48 km²), representing over 6km of prospective strike length, including an area of secondary alteration thought to be epithermal in nature, with over 2.5km of highly brecciated, west-trending jasperoid intersecting argillically and silicically altered Eocene Challis volcanics.

Market Abuse Regulation (MAR) Disclosure

The Company deems the information contained within this announcement to constitute inside information as stipulated under the Market Abuse Regulations (EU) No. 596/2014, which has been incorporated into UK law by the European Union (Withdrawal) Act 2018. Upon the publication of this announcement via the Regulatory Information Service, this inside information is now considered to be in the public domain.


For further information please visit or contact:

Phoenix Copper Limited

Ryan McDermott

Brittany Lock

Richard Wilkins

Tel: +1 208 954 7039 

Tel: +1 208 794 8033

Tel: +44 7590 216 657 

SP Angel (Nominated Adviser)

David Hignell / Kasia Brzozowska

Tel: +44 20 3470 0470

Tavira Financial Limited (Joint Broker)

Jonathan Evans / Oliver Stansfield


Tel: +44 20 7100 5100

WH Ireland (Joint Broker)

Harry Ansell / Katy Mitchell

Tel: +44 20 7220 1666

Panmure Gordon (UK) Limited (Joint Broker)

John Prior / Hugh Rich / Ailsa Macmaster

Tel: +44 20 7886 2500

EAS Advisors (US Corporate Adviser)

Matt Bonner / Rogier de la Rambelje

Tel: +1 (646) 495-2225

(Financial PR)

Tim Blythe / Megan Ray

Tel: +44 20 7138 3204



Phoenix Copper Limited is a USA focused, base and precious metals emerging producer and exploration company, initially targeting copper and zinc production from an open pit mine.

Phoenix's primary operations are focused near Mackay, Idaho in the Alder Creek mining district, at the 80% owned Empire Mine property, which historically produced copper at grades of up to 8%, as well as gold, silver, zinc and tungsten, from an underground mine.

Since 2017, Phoenix has carried out extensive drill programmes which have defined a NI 43-101 completed PEA (preliminary economic assessment) for an open pit heap leach solvent extraction and electrowinning ("SX-EW") mine, which was updated in October 2020. From the 2020 PEA, the measured and indicated resource is: 22,909,059 tonnes at an average grade of 0.38% copper, 0.324 g/t gold, 10.3 g/t silver, and 0.19% zinc. The contained metal for the measured and indicated resource is 87,543 tonnes of copper, 238,406 ounces of gold, 7,595,198 ounces of silver and 43,871 tonnes of zinc. Phoenix updated its economic model in February 2021 to include the processing of all contained metals through a two phased approach.

In addition to Empire, the district includes the historic Horseshoe, White Knob and Blue Bird Mines, past producers of copper, gold, silver, zinc, lead and tungsten from underground mines. A new discovery at Red Star, 330 metres northwest of the Empire Mine proposed open pit, has revealed high grade silver / lead sulphide ore, and from three shallow exploration drill holes a maiden inferred resource of 103,000 tonnes containing 173.4 g/tonne silver, 0.85 g/tonne gold and 3.85% lead (1.6 million ounces silver equivalent) was reported in an NI 43-101 technical report published in May 2019. Additionally, the district includes Navarre Creek, a volcanic hosted precious metals target in a 14.48 sq km area. The Company's total land package at Empire comprises 8,034 acres (32.51 sq kms).

At Empire, it is estimated that less than 1% of the potential ore system has been explored to date and, accordingly, there is significant opportunity to increase the resource through phased exploration. The stated aim of the Company is to fund this phased exploration through free cashflow generated by its initial mine. A Plan of Operations in respect of the initial open pit mine was filed with the relevant regulatory authorities in June 2021.

Phoenix also has two wholly owned cobalt properties on the Idaho Cobalt Belt to the north of Empire. An Earn-In Agreement has been signed with Electra Battery Materials, Toronto, in respect of one of those properties.

Phoenix is listed on London's AIM (PXC), and trades on New York's OTCQX Market (PXCLF and PXCLY (ADRs)). More details on the Company, its assets and its objectives can be found on PXC's website at


This information is provided by RNS, the news service of the London Stock Exchange. RNS is approved by the Financial Conduct Authority to act as a Primary Information Provider in the United Kingdom. Terms and conditions relating to the use and distribution of this information may apply. For further information, please contact or visit

RNS may use your IP address to confirm compliance with the terms and conditions, to analyse how you engage with the information contained in this communication, and to share such analysis on an anonymised basis with others as part of our commercial services. For further information about how RNS and the London Stock Exchange use the personal data you provide us, please see our Privacy Policy.
Find out how to deal online from £1.50 in a SIPP, ISA or Dealing account. AJ Bell logo

Related Charts

Phoenix Copper Limited (PXC)

-1.00p (-4.17%)
delayed 15:57PM