Bunker Hill Geophysics Survey Identifies Large-Scale, Near-Surface Anomalies to the South of Existing Mine Footprint - Seite 2

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.

Figure 3: 2D section looking SE at the Rockford target zone. Resistivity anomalies shown in magenta blocks, is available at https://www.globenewswire.com/NewsRoom/AttachmentNg/9080fab3-8fe3-4868 ...

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.

Figure 4: 2D section looking SE at the Government Gulch target zone. Resistivity shells are sliced along the 2D fence plane to show correlation and shown in blue blocks, is available at https://www.globenewswire.com/NewsRoom/AttachmentNg/1d83d89f-f92b-4472 ...

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.