BORNITE DEPOSIT
The Bornite deposit (Bornite) is a high-grade copper deposit in the Ambler Mining District with significant exploration potential. Bornite is located in a safe jurisdiction under the Mine Safety and Health Administration (MSHA). It contains copper sulfide mineralization and is estimated to hold 5.2 billion pounds of copper and 88 million pounds of cobalt. Ambler Metals maintains an active partnership with NANA, meeting regularly with NANA representatives and local tribes to share updates on project plans and developments in the area.
LOCATION
Bornite is geographically isolated and often accessed by air. It is 13 miles by road north of Kobuk, 154 miles east of Kotzebue, and 171 miles west of the Dalton Highway. The broader Ambler mining district is located in the southern flank of the Brooks Range, in the Northwestern Arctic Borough of Alaska.
GEOLOGY AND MINERALIZATION
Bornite contains copper and cobalt mineralization within a Devonian-aged carbonate sequence.
The deposit shares geological qualities with renowned copper districts worldwide, such as Mt. Isa in Australia and Kipushi in the Congo, including early epigenetic characteristics, emplacement in carbonate stratigraphy, and early-pyrite dolomite alteration followed by copper-dominant sulfide mineralization.
Copper at Bornite occurs as chalcopyrite, bornite, and chalcocite in strata-bound stringers, veins, and breccias aligned with favorable stratigraphy, with pyrite and sphalerite above and siderite-altered pyrite and pyrrhotite below.
Cobalt is present as cobaltiferous pyrite around the copper zones and as cobalt sulfides like carrollite and cobaltite. Mineralization ranges from low-grade disseminations to high-grade stratiform massive sulfides, with intermediate forms including stringers and breccia matrix replacement.
