Coeur Provides Silvertip Exploration Update - Seite 2

Since acquisition in late 2017, the Company’s exploration investment has nearly tripled the measured and indicated resource base, including a year-over-year increase of silver, zinc and lead of approximately 128%¹, 132%¹ and 131%¹, respectively. Historically, mineralization at Silvertip was hosted in a single sub-horizontal manto horizon located at the top of the McDame Limestone package in contact with the Earn sediments above (see Figure 3 below). Since late 2017, Coeur has discovered several new, stacked manto horizons hosted at different elevations throughout the McDame Limestone. In addition, numerous sub-vertical mineralized chimneys have also been discovered with Southern Silver Zone being the largest to date. This zone accounts for approximately 50% of the current inferred resource and 9% of the current measured and indicated resources. Multiple other chimney targets have been identified and are ready for drill-testing during this new program.

In addition to mineralization in the McDame Limestone unit, favorable indications for mineralization have also been identified lower in the stratigraphic sequence, in the underlying dolostone, sandstone and Atan Group limestones (see Figure 3 below). This opens up over 2,500 vertical meters of stratigraphy that is prospective for stacked, carbonate replacement deposits. Testing this large vertical extent of stratigraphy is a key focus of the upcoming drill program.

Another key aim will be to continue building the resource base immediately adjacent to Silvertip located near existing underground development. This will be undertaken mainly over the two kilometer corridor immediately south of the main Silvertip deposit. During 2020 – 2022, 15 of 16 scout holes from Saddle Zone south to Tour Ridge intersected mineralization. This program also outlined mineralization one kilometer north through the Keda zone, thereby doubling the known mineralized strike length to more than four kilometers (see Figure 4).

Alongside the known silver, lead, zinc carbonate replacement style mineralization, the Silvertip District is prospective for porphyry and / or skarn mineralization. A recently completed deep drillhole tested a circular, geophysical anomaly located to the southeast of Silvertip. This anomaly is interpreted to be a potential heat and fluid source for the Silvertip deposit. Geology intersected in this drilling includes higher temperature mineralogical assemblages and increased quantities of alteration and veining that are indicative of an intrusive porphyry or skarn source at depth. The hole therefore provided proof of concept and additional exploration drilling is being designed to further test this target during the next 18-24 months.