our mines
the kelvin COPPER DEPOSIT ARIZONA, USA.
Location: Arizona - Pinal County
33°05'35.0"N 111°01'45.9"W
Claims staked: 226
Area: c. 4,520 acres (Seven square miles)
“the gem of arizona”
Tempestas Copper Inc is a leading organization in the global mining sector, managing operations across the United States, Chile, and Mexico. We are at the forefront of driving the future of electrification, development of AI, and advancing the goal of achieving Net-Zero Emissions by 2050.
By far our biggest and most valued project which we have worked on for the last 3 years with the previous owner, John M. Johnson, formally Century Copper LLC. Situated in the southern Tortilla Mountains of East-Central Arizona, the Kelvin Copper Deposit lies 5 miles southwest of the ASARCO Ray Copper Mine, currently Arizona’s second largest copper producer.
The original Kelvin Copper Deposit overall consists of one patented, and 225 unpatented lode mining claims, generally comprising the South-West half of Section 9, the Eastern one-third of Section 8, and the North-Eastern-most corner of Section 17, of T4S, R13E of the Gila & Salt River Base and Meridian in Pinal County, Arizona.
The project sits squarely within the North-West trending Arizona Copper Belt, located roughly 60 miles southeast of Phoenix, and 60 miles north of Tucson.
Tempestas took ownership in Q4 2020. The company now has a completed technical 43-101 which is the baseline for the increase of drill programs, covering twelve short drills to 256ft in the Zellweger, and seven long drills to 3000ft in the Kelvin.
With Darling Geomatics, we have staked out additional claims, increasing the number of Claims staked to 212 thus increasing the size of the project from 1 square mile to 7 square miles. According to geographic maps and area knowledge of 1 square mile, these claims will provide expected copper depsosits extractable of minimum 3 Billion Pounds (lb) to a maximum 10 Billion Pounds (lb) - which at current prices value our in ground assets at $15.3 Billion to $51.1 Billion [$5.11 per pound - LME, March 28, 2025, at 09:52am].
Ground composition
Most of the copper resource in the Kelvin occurs in the Kelvin Mineralised Zone, an approximately 20-degree northwest-dipping, slab-like body of primary porphyry-style copper mineralization. This body occurs at depths below surface of 1640 feet – 2000 feet at the up dip southeast end of the body to 2000 feet – 2900 feet in the deepest drill intercepts in the northwest portion of the body. Drill hole cross sections define a higher-grade core zone with a thickness of 120 – 200 feet that occurs within the mineralized zone that appears to show good continuity averaging 0.42% to 0.66% copper within these drill holes.
The mineralised zone appears to thicken and deepen to the northwest and west. It is also consistent with the IP data that shows the zones of anomalous IP response migrating to the northwest and north at greater values of the electrode spacing.
Tempestas’ Zellweger Deposit is located just 700 feet North of the Zellweger mine shaft. Based upon the geophysical survey and detailed geologic mapping, the Zellweger Deposit initial mining target is 2,000,000 Metric Tons of 2.5% Copper Ore. The grade estimate is based on the average obtained from samples taken in the Zellweger Mine subsurface.
SITTING ON A “COPPER” MINE
The real upside exploration potential of the Kelvin Porphyry System is for the discovery of additional mineralized fault slices. Based on the structural model there should be at least 2 and perhaps as many as 5 additional slices. One or more of these slices could contain a Supergene Enrichment Zone that originally formed in the Eocene.
The recent discovery of the Resolution porphyry in the Superior district 15 miles to the northeast of Kelvin exemplifies the upside potential. Resolution Copper Mining is developing one of the largest undeveloped copper resources in North America. The Resolution porphyry is buried beneath post-mineral volcanic but is upright and intact (un-faulted). The resource total at Resolution is in excess of 1.5 billion tons and includes at least 500 million tons of supergene enriched mineralization grading 1.5% Cu that dates from the Eocene.
If the fault-bound, the Kelvin Mineralised Zone block has the interpreted geometry, then the total resource in the block could be as much as 320,000,000 tons. Three to six fault slices of the same size would equal a resource of 960 to 1.92 billion tons, nearly equal the size of the Resolution discovery.
Mission Geoscience, Inc. (MISSION) has conducted a cursory review concerning the Zellweger Mine and Kelvin Copper-Molybdenum Project in Pinal County, Arizona. Concluded on December 15th, 2014, assuming that the entirety of the forgoing estimated tonnes of copper were present within the confines of the Zellweger Mining Claim, roughly 80% of that contained copper recovered using conventional solvent extraction and electro-winning (SX-EW), there is estimated 135,640,782 pounds total copper in ore.