ArcWest Provides Exploration Update on 2023 Todd Creek Program, Funded by Freeport-McMoRan Mineral Properties Canada Inc.

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Vancouver, British Columbia--(Newsfile Corp. - March 4, 2024) - ArcWest Exploration Inc. (TSXV: AWX) ("ArcWest") is pleased to report results from the Company's comprehensive 2023 exploration program at its Todd Creek copper-gold (Cu-Au) project, located in BC's Golden Triangle (the "Todd Creek project").

ArcWest's 100% owned, 32,000 hectare Todd Creek project adjoins Newmont Corporation's recently acquired Brucejack Gold Mine property, one of the highest-grade operating gold mines in the world, and is located approximately 40 km southeast of Seabridge Gold's KSM-Iron Cap Cu-Au deposits, which are one of the largest Au-Cu concentrations in North America.

The 2023 Todd Creek exploration program (geophysics, geological mapping and geochemical sampling), with an approved expenditure of up to $2.8 million, was funded by Freeport-McMoRan Mineral Properties Canada Inc. ("Freeport"), as per an earn-in agreement announced March 10th, 2023. An updated technical presentation for the Todd Creek project is available for download here.

Highlights

  • The 2023 Todd Creek program included one of the largest 3D IP surveys in British Columbia history, completed by Dias Geophysics using their DIAS32 system. The IP survey focused on a 12 km N-S by 3 km E-W highly gossanous corridor on the west side of Todd Creek valley that is host to numerous Cu-Au occurrences over a widespread area. The survey delineated three extensive zones of high chargeability (25-45 mV-V) underlying or in proximity to areas of known Cu-Au mineralization on the property, including: (1) in the Fall Creek - Ice Creek area, (2) west and north of historical drill holes in the Yellow Bowl Zone, and (3) west of the South Zone. The highest chargeabilities were located in the Fall Creek - Ice Creek area where a 2 by 1 km zone (open to the north) wraps around a strong 300 by 800 metre conductor (low-resistivity zone). None of the high chargeability zones and conductors identified in the 2023 IP program have been drill tested.

  • Ice Creek Zone - six new rock samples along a 1 km long north-south trend returned gold values in excess of 1 g/t (grams per tonne), including a sample of hydrothermal breccia returning 262 g/t Au (with 2.46% Cu), one of the highest gold values seen to date on the project. Copper values within the trend range up to 3.43%. The Ice Creek Zone is underlain in part by a coincident chargeability (> 35 mV/V)/resistivity (< 250 ohm-m) anomaly with approximate dimensions of 500 m by 800 m. This newly recognized geophysical target with coincident high-grade surface rock samples, is untested by drilling (Fig. 1).

  • Fall Creek Zone - prospecting located a breccia dyke between the A and B zones which returned an assay of 1.15 g/t Au, 0.76% Cu and 80 parts per million molybdenum (Mo). Rock samples from the south side of Fall Creek returned assays of 0.039-3.21 g/t Au, 0.31-3.67% Cu and 2.6-22.5 g/t silver (Ag) in an area with only one shallow drill hole. The 2023 geophysical survey has identified a largely untested chargeability anomaly underlying much of the Fall Creek area (Fig. 2).

  • Yellow Bowl - Multiple untested chargeability anomalies have been identified beneath variably Cu-Au mineralized, predominantly quartz-sericite-pyrite altered volcanic rocks of the Yellow Bowl target area (Fig. 3). 3D IP results suggest that 2020 drill holes at Yellow Bowl did not test the chargeability anomalies.

  • South Zone - A significant (> 30 mV/V) chargeability anomaly has been identified at depth to the west of epithermal Au-Cu lodes of the South Zone and newly recognized advanced argillic alteration (Fig. 4). The chargeability anomaly is untested by drilling.

  • A new zone prospective for massive sulfides was discovered (South Ridge Zone) over two km west of the South Zone in a previously unexplored area. An area of QSP alteration over 2 km long contains massive sulfide lenses in siliceous sedimentary rocks overlying intensely QSP altered feldspar-porphyritic tuffs. Rock samples returned up to 3.96% Cu, with soil samples up to 296 ppm Cu.

  • Alteration mapping supported by TerraSpec analyses has defined extensive phyllic (muscovite) alteration over a north-south length of 13.5 km and across widths of 2-3.5 km, as well as a number of smaller structurally controlled zones of advanced argillic alteration (pyrophyllite, alunite, diaspore, dickite) in the Yellow Bowl Zone, Pyrophyllite Zone, and west of the South Zone.