Projects

Overview

Mineral Mountain is an early stage Laramide age, exploration project located in the Mineral Mountain Mining District, 20 miles east of Florence, Arizona..  The project is located within a 100 km long, ENE structural trend that hosts the Casa Grande, Florence, Resolution and Globe-Miami copper deposits.  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.

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.

Regional Setting: 
The project is located on the Casa Grande to Globe-Miami mineralized trend between the Florence copper deposit to the west and the Resolution copper deposit to the east.  The table below provides an indication of the size and copper grades of the Laramide age copper deposits located within the Casa Grande to Globe-Miami mineral trend.

District tonnes copper (%) contained copper (lb)
Globe-Miami 1,594,000,000 0.64 22,484,326,400
Resolution 1,624,000,000 1.47 52,615,651,200
Florence* 490,000,000 0.33 3,234,000,000
Casa Grande* 740,000,000 0.90 14,678,640,000

*In-Situ Copper Recovery (“ISCR”) project.  Only oxide copper content of the deposit shown.  The information for the Laramide age porphyry copper deposits listed in the above table is taken from public sources.  Copper Fox has not attempted to verify this information.

Project Geology:

The project is underlain by Precambrian age, Pinal Schist, diabase and granite rocks that has been intruded by Laramide age Quartz Monzonite and Granodiorite stocks.  The Quartz Monzonite stock is cut by several late stage, ENE and NS trending aplite, aplite-pegmatite, hornblende dacite and porphyritic dikes (30% phenocrysts).  

The Quartz Monzonite stock in contact with the Precambrian rocks on the western side of the property is unmineralized and exhibits sporadic weakly prophylitic alteration.  In the east-central portion of the stock, a 4,500m long by up to 2,000m wide area exhibits the mineralization, alteration and geophysical signatures of a porphyry copper system.  The stock dips to the east under Precambrian rocks and is terminated to the north by a regional scale NNW trending fault zone.  Precambrian age Pinal Schist is exposed on the north side of the NNW trending fault zone.

Structure:

The property exhibits the regional scale features typical of other porphyry copper systems and deposits in Arizona.  The property is located on the flank of coincident positive, regional magnetic and gravity anomalies.  Immediately adjacent to the western property boundary, a N-S trending “Range Front” fault marks the contact between Precambrian two mica granite and excessively thick Quaternary sediments.  The most prominent structural feature within the property is a WNW trending structural zone located in the center of the property that separates the Quartz Monzontie stock from Precambrian age Pinal Schist.  This structural feature marks the northern extent of the Quartz Monzonite stock and associated porphyry style alteration and copper mineralization.

ENE and N-S trending faults have also been identified on the property.  The ENE trending dacitic and porphyritic dikes that cross-cut the Quartz Monzonite stock are interpreted to have been intruded along ENE trending fault zones or zones of structural weakness.  These dikes show a strong affinity to the copper-molybdenum mineralization.  The ENE trending dikes are offset by late stage, post mineralization, N-S trending district scale, dextral faults.

Miocene age precious metal and high sulfidation base metal fissure vein systems related to the Laramide intrusive event occur in the Pinal Schist in the northern portion of the property.

Exploration Results:

Mapping and sampling between 2015 and 2017 outlined a 1,100m by 900m zone of porphyry style mineralization in the potassic and phyllic altered Laramide age Quartz Monzonite stock.  A significant number of samples from this area returned between 1% and 6.6% copper due to abundant chalcocite mineralization.

The 2019 mapping and rock characterization sampling program was completed to determine copper-molybdenum-gold-silver and trace element concentrations in mineralized structures exposed in outcrop.  The samples, although not necessarily representative of the mineralization on the property, provides geochemical data that could be used as a vector pointing toward the center of the porphyry system.  The sampling program outlined two large porphyry copper targets.

Target #1:

The 2019 program expanded the copper mineralization within the Quartz Monzonite stock to a 4,500m long by up to 2,000m wide area that hosts approximately 600 copper showings.  The primary copper minerals are malachite, chrysocolla and chalcocite as well as rare covellite and chalcopyrite.  The mineralization occurs as disseminations, in quartz veinlets and in fractures.  The abundant secondary copper minerals and chalcocite suggests several episodes of weathering/oxidization/supergene enrichment of the porphyry copper mineralization.  Three zones of coincident copper-molybdenum mineralization have been delineated within this target, the largest of which correlates with a positive chargeability.resistivity anomaly (1,800m x 900m) outlined in 1971.  The tables below show the range of copper-molybdenum concentrations by target.  The alteration patterns, molybdenite mineralization (“B” veins) and spatial distribution of the different styles of copper mineralization suggest an outward progression from the core of a porphyry system.

Target #2:

This target is located approximately 800m east of the Quartz Monzonite stock.  The copper mineralization is hosted in Precambrian granitic rocks, diabase and in E-W trending Laramide age granodiorite dikes.  Copper mineralization occurs in a NE trending area that measures approximately 2,800m long by 400m wide characterized by malachite and chrysocolla hosted in quartz veins and fractures.  The lower molybdenum concentrations and diffferent styles of copper mineralization in this target area are interpreted to reflect the depth to the source porphyry stock.

The Average Concentration and Range of Values of the sytles of mineralization within the two targets are show in the tables below.

 

 

 

 

Average Concentration

 

 

Style of

Number of

Cu

Cu

Mo

Au

Ag

Mineralization

Samples

(ppm)

(%)

(ppm)

(ppb)

(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

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

 

 

 

 

Range of Values

 

 

Style of

Number of

Cu

Cu

Mo

Au

Ag

Mineralization

Samples

(ppm)

(%)

(ppm)

(ppb)

(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

The average metal concentrations in Quartz Vein hosted mineralization (see below) are significantly different possibly due to the depth of the source porphyry.

Target Cu (ppm)  Cu (%) Mo (ppm) Mo (%) Au (ppb) Ag (ppm)
Target #1  9,621 0.962 80 0.008 143.9 17.6
Target #2  18,542 1.854 27 0.003 82.7 12.8

Cu = copper, Mo = molybdenum, Au = gold, Ag =silver, (%) = percent, ppm = parts per million, ppb = parts per billion. Number are rounded to reflect best practice principals.

Re-sampling of certain sample sites confirmed the high concentrations of molybdenum initially reported in these samples.

Alteration Mapping:

Mapping of alteration patterns using major element geochemistry has outlined two large (1,000m to 1,500m long by 800m  to 1,000m wide) areas of potassic alteration in Target #1 along the eastern margin of the Quartz Monzonite stock and a 1,000m by 400m wide zone in Target #2.  Phyllic alteration is more widespread and in general surrounds the potassic zone although some overlap does occur.  The prophylitic alteration envelope is widespread and overprints the potassic alteration as would be expected in a porphyry copper system.  The mineralization shows a strong correlation to the potassic and late propylitic alteration.  The geochemical mapping shows that the western margin of the Quartz Monzonite stock exhibits weak propylitic to fresh rock, consistent with field observations.

Geological Model:

The geological model envisions two porphyry cupolas within the property.  Target #1 is located along the eastern portion of the Quartz Monzonite stock and exhibits the alterations and mineralization of a porphyry copper system.  The secondary copper minerals are interpreted to represent the transition zone between the oxide zone (malachite, chryscolla, azurite) and supergene zone (chalcocite) of a weathered/oxidized/enriched porphyry copper-molybdenum deposit.  The copper-molybdenum mineralization, alteration and host rocks in Target #2 suggest a deeper-seated porphyry cupola emanating mineralized fluids upward along fractures..  

Historical Chargeability Anomaly:

In November 1971, Marguerite Lake Mines Ltd under the supervision of Fred. J. Syberg, B.Sc. completed an Induced Polarization and Resistivity survey (six lines) using a dipole-dipole configuration in a portion of the property now covered by Target #1.  Syberg concluded that the survey identified a chargeability anomaly measuring approximately 6,000 ft (1,800m) long by approximately 3,000 ft (900m) wide. 

 Exploration Plans:

The surface work has defined two large porphyry copper targets.  The project has been advanced to the geophysical exporation stage.  A deep penetrating induced polarization and resistivity survey is warranted to test the surface mineralization and historical geophysical signature at depth.