Ann: New cobalt assays identified at Broken Hill, page-2

New cobalt assays continue to build the case for
Broken Hill
❖ Ongoing work on the block model and JORC mineral resource estimate
uncovered new cobalt assays – within the Defined Target Area that
hosts the Tors & Reef Tank Prospects – for 20 shallow drill-holes not
captured in the Geological Survey of NSW’s database:
❖ Figure 1 shows how the best two new intercepts align with
previous results reported on 1 March 2022;
❖ The new results will be codified then added to the 6,380 drill-holes
which are being factored into the geological model; and
❖ Holistically, the assays demonstrate a significant cobalt system
could be apparent within the Defined Target Area (Figure 2)
FIGURE 1: BEST ASSAYED INTERCEPTS – DEFINED TARGET AREA
New: 5m @ 1,200ppm Co from 15m (AGSO2740)
10m @ 510ppm Co from 5m including
5m @ 690ppm Co from 10m (AGSO2716)1
Reported: 7m @ 1,600ppm Co from 30m (1800E1180N)
15m @ 760ppm Co from 67m (3E51N)
10m @ 520ppm Co from surface (2925E1240S)
5m @ 520ppm Co from 45m (TT05W10N)2
(Note: Refer to CCZ ASZ Release – 21 March 2022 which confirms significant cobalt intercepts at The Sisters
Prospect) Source: CCZ geology team
❖ Discovering high-quality incremental data sets further builds a
compelling case there is ample geological data within the Defined
Target Area to prove up a primary cobalt JORC 2012 compliant mineral
resource estimate
FIGURE 2: EAST ZONE, BHA PROJECT
Source: CCZ geology team
Castillo Copper’s CEO Dr Dennis Jensen commented: “Discovering the new
assay results is positive news, as it reinforces there is potentially significant cobalt
mineralisation apparent within the Defined Target Area. More than ever, the
Board is optimistic there is ample data to model up a primary cobalt mineral
resource estimate that complies with the JORC (2012) Code.”