Alta Copper  has a 100% interest in the Don Gregorio property which is a copper-gold porphyry target located in northern Peru 140 km NNE of Chiclayo in the department of Cajamarca. The property consists of one mineral claim totaling 900 hectares. The property is located approximately 40 km north of Alta Copper`s Cañariaco Project. The Don Gregorio property is one of the projects held by the Company’s wholly owned subsidiary, Cobriza Metals Peru S.A.C. (“Cobriza”).

Alta Copper acquired the Don Gregorio from the Peruvian government in a competitive auction in 2008.  Don Gregorio covers a mineralized (copper-gold) porphyry system, that occurs within the same geological trend as Yanacocha, Cerro Corona and Cañariaco.

Don Gregorio (previously referred to as “La Huaca”) was discovered by INGEMMET (Peruvian government geological survey) in 1974 during a regional exploration program.  In 1977, 8 holes were drilled to a maximum of 107 metres (“m”) and intersected o.22 to o.56% Cu over 15m to 100m, averaging 50m and bottoming in mineralization.  These holes were not analysed for gold.

In 1992, a Newmont Buenaventura Joint Venture (“JV”) discovered a gold (“Au”) zone in surface samples covering 200m by 700m coincident with copper (“Cu”) previously delineated in a north-northwesterly trending zone.  In 1995, the Newmont-Buenaventura JV drilled 4 holes in 800m. These 4 holes were also mineralized to final depths.

The 12 holes totalling 1,642m drilled to date indicate copper and gold mineralization occurs over a minimum of 400m vertically from 2,600 to 2,200 metres in elevation. 

Mineral intercepts in the historic drilling include 153.3m of 0.39 percent (“%”) Cu & 0.18 grams per tonne (“g/t”) Au. 

Surface samples collected to date include assays of:

• 20m of 1.23% Cu and 0.26 g/t Au
• 9m at 1.13% Cu and 0.90 g/t Au
• 3m at 1.36% Cu and 0.84 g/t Au

The Company entered into an Option Agreement on the Don Gregorio project with Forte Copper Corp. in June, 2017. In November 2020, the two companies entered into an Assignment Agreement. Pursuant to the option agreement, Forte Minerals had an option to acquire a 60% interest in the Don Gregorio property by making cash payments totaling US$500,000 USD, of which USD$100,000 were paid, and performing 10,000 m of drilling within 3 years of acquiring drill permits, which was not carried out.

In April, 2025 the Option Agreement and Assignment Agreements were terminated and the property returned in good standing to Alta Copper. Alta Copper is currently in discussions with several groups for purposes of executing an option agreement.