Mr. Elmer Stewart reports
COPPER FOX PROVIDES PRELIMINARY RESULTS OF GEOPHYSICAL SURVEY ON THE SOMBRERO BUTTE PORPHYRY COPPER PROJECT
Copper Fox Metals Inc. and its 100-per-cent-owned subsidiary, Desert Fox Sombrero Butte Co., have provided preliminary results of the recently completed DC (direct current) resistivity induced polarization chargeability (DCIP) and magnetotelluric (MT) geophysical surveys (see news release dated Nov. 26, 2024) on the Sombrero Butte porphyry copper project. The Sombrero Butte project is located approximately three kilometres south of the Copper Creek porphyry copper project currently undergoing exploration/development by Faraday Copper Corp.
The primary objective of geophysical program was to obtain a subsurface chargeability/resistivity model to be used in conjunction with updated geology and alteration models and distribution of copper-molybdenum mineralization to transition the project, if possible, to the drilling stage.
Elmer B. Stewart, president and chief executive officer of Copper Fox, commented: "The preliminary results of the geophysical program identified anomalous chargeability on all seven lines surveyed representing an area measuring approximately 2,400 metres in an east-west direction and ranging from 500 metres on L0000E to 2,500 metres wide on L0800E in a north-south direction. The spatial correlation between the anomalous chargeability and the previously announced limonite alteration zone hosted in moderate to intensely altered Laramide-age Glory Hole volcanics continues to support our interpretation of the presence of a large porphyry copper system within the Sombrero Butte project. While these preliminary results are encouraging, receipt of the final geophysical report is required before any conclusions can be made as to the significance of the anomalous chargeability/resistivity signature."
Geophysical survey
In porphyry copper deposits, anomalous chargeability signatures are typically interpreted to indicate zones of potential mineralization by showing high chargeability values associated with disseminated sulphide minerals such as pyrite and chalcopyrite. Resistivity data are used to interpret various alteration patterns associated with porphyry copper systems, for example, areas of high chargeability associated with high resistivity could indicate the presence of sulphide mineralization associated with advanced argillic alteration whereas high chargeability associated with moderate to low resistivity could be indicative of sulphide mineralization associated with phyllic (quartz/sericite/pyrite) alteration. Both styles of alteration occur within the project based on the 2024 mapping program.
For the purposes of this preliminary interpretation, anomalous chargeability is defined as greater than 20 milliradians. Resistivity readings between 30 and 400 ohms are interpreted to represent low-moderate resistivity and readings greater than 1,000 ohms represent high resistivity. The transition from low-moderate to high resistivity generally occurs rapidly over short distances. The depth of exploration (reasonable confidence in the data) is estimated to be approximately 800 metres. Results of the MT survey will be released upon receipt of the final report from Quantec Geoscience USA Inc. All distances in this news release are approximate.
On the east side of the project represented by L1600E, L2000E and L2400E, the upper portion, 200 metres of the survey lines, is characterized by high chargeability and low-moderate resistivity. At a depth of 400 metres below surface, anomalous chargeability (greater than 20 milliradians) occurs over a distance of 1,700 metres on L2400E and increases to 2,500 metres on L1600E. Similarly, on L2400E the anomalous chargeability is accompanied by low-moderate resistivity whereas, on L2000E and L1600E, the anomalous chargeability is accompanied by zones of high resistivity (greater than 1,000 ohms), separated by a zone (estimated to be approximately 1,000 metres wide) of low-moderate resistivity. On L1600E and L2000E, anomalous chargeability and associated high resistivity have been surveyed to a depth of 800 metres below surface and remain open at depth. Ground checking on L1600E indicates the anomalous chargeability occurs within an area of limonite alteration (quartz-sericite-limonite veinlets, limonite-filled fractures and pervasive intense limonite staining) hosted in moderate to intensely altered Glory Hole volcanics. In fresh rock, sporadic quartz-pyrite-chalcopyrite veinlets, pyrite veinlets, chalcopyrite veinlets and fractures occur.
In the central portion of the project represented by lines L1200E and L800E anomalous chargeability occurs over widths that range from 750 metres to 1,000 metres at surface that increases to widths of 2,000 metres on L1200E and to 2,400 metres on L0800E at depth. The anomalous chargeability on these two lines remains open at a depth greater than 800 metres below surface. The anomalous chargeability on L1200E is accompanied by strong (greater than 1,000 ohms) resistivity that extends for a distance approximately 1,000 metres on the northern half of the survey line and by a zone of low-moderate (less than 300 ohms) resistivity on the southern half of the survey line. On L0800E, the zone of strong resistivity also occurs on the northern portion of the survey line and is estimated to be approximately 600 metres wide at the end of the survey line.
On the western side of the project, represented by L0000E and L0400E, the interpreted top of the anomalous chargeability occurs at an estimated depth of approximately 400 metres below surface. On L0400E, the anomalous chargeability extends over approximately 1,500 metres on the northern portion of the survey line accompanied by a zone of strong resistivity that overlies the anomalous chargeability and a broad zone approximately 2,000 metres wide of low-moderate resistivity bordering the anomalous chargeability on the southern side of the survey line. On L0000E, anomalous chargeability occurs over a 500-metre interval at the northern end of the line. The locations of the high and low-moderate resistivity zones accompanying the anomalous chargeability are like that on L0400E. The significant drop in depth to the top of the anomalous chargeability is interpreted to be due to dismemberment of the geophysical signature related to either Miocene-age extensional tectonics or the possibility the porphyry system is plunging to the west.
Elmer B. Stewart, MSc, PGeo, president and chief executive officer of Copper Fox, is the company's non-independent, nominated qualified person pursuant to National Instrument 43-101, Standards for Disclosure for Mineral Projects, and has reviewed and approves the scientific and technical information disclosed in this news release.
About Copper Fox Metals Inc.
Copper Fox is a Tier 1 Canadian resource company listed on the TSX Venture Exchange focused on copper exploration and development in Canada and the United States. The principal assets of Copper Fox and its wholly owned Canadian and United States subsidiaries, being Northern Fox Copper Inc. and Desert Fox Copper Inc., are the 100-per-cent ownerships of the Van Dyke ISCR (in situ copper recovery) project and the Mineral Mountain and Sombrero Butte porphyry copper exploration projects -- all located in Arizona; and the 25-per-cent interest in the Schaft Creek joint venture with Teck Resources Ltd. on the Schaft Creek copper-gold-molybdenum-silver project and the 100-per-cent-owned Eaglehead polymetallic porphyry copper project, each located in northwestern British Columbia.
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