Projects

Overview

Introduction
Mineral Mountain is an early stage Laramide age, copper porphyry exploration project located in the Mineral Mountain Mining District, 20 miles east of Florence, Arizona.  The project is located on the 100 kilometer (km) long Casa Grande to Globe-Miami mineralized trend between the Florence copper deposit to the west and the Resolution copper deposit to the east.  The Laramide copper province in Arizona hosts a substantial number of large porphyry copper mines and deposits.  Arizona is a mining friendly, politically secure jurisdiction with excellent and readily accessible infrastructure.

Property Descripton
The property is 100% owned by Copper Fox and consists of one Arizona exploration permit (293.5 ha) and 180 BLM claims covering approximately 1,457.5 ha.

Exploration Activities
In 2021 Copper Fox completed a reconnaissance style deep penetration chargeability/resistivity survey over Target #1 and updated the geological model.  The results of these activities have transitioned the project to the drilling stage, which is currently planned for 2022.

Chargeability/Resistivity Survey Highlights

  • A positive chargeability anomaly with approximate dimensions of 2,900 meters (m) by 1,300m has been outlined.  The anomaly extends under the Precambrian rock and is open to the southwest
  • The chargeability anomaly correlates with the copper-molybdenum mineralization in outcrop and post mineral faults that control the limits of mineralization
  • A positive resistivity anomaly (600m by 400m) within the chargeability anomaly coincides with a zone of copper-molybdenum mineralization with molybdenum concentrations ranging from 20 to 1,700 parts per million (ppm) in outcrop

Geological Model
The project covers a multi-phase, Laramide age intrusive stock that measures approximately 5km by 2km.  The western portion of the stock exhibits sporadic, weak propylitic alteration and is not mineralized.  The eastern portion of the stock exhibits altered, mineralized and non-mineralized granodiorite and quartz monzonite phases cut by syn-mineralization late-stage dikes.  The Laramide stock is interpreted to dip to the east under the Precambrian rocks.

The copper mineralization is constrained to the west by regional scale N-S and ENE trending faults and on the north by a prominent NNW trending fault that marks the boundary between the Laramide stock and Pinal Schist.

The mineralization is associated with early stage potassic alteration, overprinted by pervasive sericite and late stage propylitic alteration phases exhibiting copper-epidote veining.  The mineralization occurs as dissemination and in fractures and quartz veinlets.  Malachite, chrysocolla, chalcocite and azurite are the main copper minerals resulting from the transformation of primary chalcopyrite related to weathering/oxidization/enrichment processes after the Laramide hydrothermal event.

2020 Exploration
In 2020 a Geochemical Factor Analysis concluded that the mineralization resulted from shallow-level hydrothermal fluids leaking out of a geochemically well-zoned, deeper porphyry copper system.  Significant post-mineral rotation of the district had not occurred since the Laramide mineralizing event.

Age dating (U/Pb zircon age) of the quartz monzonite stock yielded a mean age of 69.7 +/- 0.4 Ma. confirming a Laramide age for the intrusive.

2019 Exploration
The 2019 mapping/sampling and rock characterization program outlined two large areas of copper porphyry style mineralization.

Target #1 is located within the Laramide age stock and measures approximately 4,500m long by up to 2,000m wide.  The mineralization consists of malachite, chrysocola and chalcocite as well as rare covellite and chalcopyrite as disseminations, in quartz veinlets and in fractures.  Three zones of coincident copper-molybdenum mineralization occur within this target.

Target #2 is located primarily in Precambrian rock and is approximately 2,800m long by 400m wide located approximately 800m east of Target #1.  Malachite and chrysocolla occur in quartz veins and fractures. 

The Average Concentration and Range of Values of the styles of mineralization within the two targets are shown in the tables below:

Average Concentration

Style of
Mineralization

Number of
Samples

Cu
(ppm)

Cu
(%)

Mo
(ppm)

Au
(ppb)

Ag
(ppm)

Disseminated

47

5,752

0.575

71.8

57.9

6.6

Quartz Vein

141

12,020

1.202

65.3

127.5

16.3

Fracture

135

4,223

0.422

13.6

43.1

7.3

 

Range of Values

Style of
Mineralization

Number of
Samples

Cu
(ppm)

Cu
(%)

Mo
(ppm)

Au
(ppb)

Ag
(ppm)

Disseminated

47

73 to 20,200

0.007 to 2.20

0.5 to 1,060

5 to 696

0.4 to 65.4

Quartz Vein

141

80 to 103,800

0.008 to 10.38

0.2 to 2,080

5 to 872

0.2 to 483

Fracture

135

13 to 30,000

0.001 to 3.00

0.5 to 282

5 to 465

0.2 to 65.4

Cu = copper, Mo = molybdenum, Au = gold, Ag =silver, (%) = percent, ppm = parts per million, ppb = parts per billion