Bunker Hill Mining Corporation announced the final results of its ground geophysical program. The geophysical program, which ended in September of 2021, has now been run through multiple inversion modeling processes to create a high-resolution 3D block model. Previously identified lithologic and structural features are well represented in the data and have allowed for Bunker Hill geologists to further refine geologic models over the program area previously generated from historic mapping programs. Two key targets have been identified for further exploration: the Rockford Target and Government Gulch Target.

Mineralization at the Bunker Hill Mine is generally associated with 2 main structural orientations: a WNW strike for Zn-Pb-Ag massive to disseminated mineralization, (known locally as the “Bluebird” style mineralization) and a NE trend for Pb-Ag Quartz-Galena vein mineralization. 3D data collection and processing allowed for the survey to investigate both orientations in the same program. The two key anomalies identified are both tabular in nature and have WNW strikes.

This orientation, along with their size and close association to known large-scale fault structures, make them similar to the mineralization identified in Bunker Hill's current Mineral Resource Estimate, effective November 29, 2021. The Rockford Target: The Rockford target is hosted at the intersection of the Rockford and Midland faults. Host lithology is the Revett quartzite, here identified by its relatively low IP and high resistivity values.

Disseminated pyrite, a dominant feature of the Zn-Pb-Ag mineralization shows an elevated IP response, with a decrease in resistivity. Normal fault wedge-hosted mineralization is known to have existed in multiple locations throughout historic development at Bunker, specifically the March stope which was the single largest producing region of the Bunker Hill mine recording ~4.7Mt of material at 12.03% Pb, 5.22 OPT Ag, and 2.25% Zn. Top of the target zone lies only 150' from surface, 250' from the historical mine footprint and is located adjacent to an existing roadway with excellent access for future drill testing.

A historic down-hole IP geophysical survey on the 21-level of Bunker Hill shows the IP/resistivity characteristics of both massive and finely disseminated sulfide mineralization within Revett rocks to match those of the Rockford target zone. The Government Gulch (GG) Target: The Government Gulch fault brings the deeper Belt series rocks into contact with the Revett quartzites. The GG target zones lie approximately 900' in the hanging wall of the Government Gulch fault structure and both strike NW with an approximately vertical, slightly NE dip.

The tabular nature of the targets shows well defined, along-strike truncation of the combined high IP response with very low resistivity values, separating the target zone from other similar response characteristics of the Prichard thought to identify stratigraphically constrained beds with elevated pyrite content. The larger of the zones measures approximately 1000' along strike, 250' wide and 700' down dip, placing it on the same scale as the largest-ever identified, continuously mineralized zone at Bunker Hill, the Quill-Newgard. The top of the GG target zone lies less than 400' surface and directly adjacent to the already established road network used for the mobilization of the geophysical program.

Bunker Hill is currently developing options to mobilize an exploration program to advance and delineate both the Rockford and GG target zones.