Develop Global Limited announced exceptional infill, extension and exploration drilling results which will help underpin a significant Resource upgrade at its Sulphur Springs copper-zinc-silver project in WA's Pilbara. The latest results are consistent with Develop's strategy to upgrade a substantial proportion of the Inferred Resource to the Indicated category. This will pave the way for an increased Reserve, optimised mine development plan, revised project costings and finalisation of funding options.

The assays also extend the known mineralisation, highlighting the potential to increase the total inventory. This mineralisation will be pursued in a follow-up drilling program later this year. The Sulphur Spring Resource stands at 13.8Mt at 2.8% CuEq1 (1.5% Cu, 3.8% Zn, 0.2% Pb and 17gpt Ag), including 9.4Mt in the Indicated category.

Develop Managing Director Bill Beament said the latest results were highly significant for Develop. Drill Programme Details: As previously announced, a total of 68 drill holes were completed as part of the Company's de-risking and growth strategy at Sulphur Springs. The drilling was designed to infill the Inferred material within the Sulphur Springs Resource to a nominal 30m x 30m density, with additional exploration drilling also completed across several target areas.

Assay results have now been received from all drillholes in the programme. These results will be incorporated into a Resource upgrade expected in the September quarter, 2022. They will also be used to delineating additional drilling targets for further Resource expansion.

Resource Infill - Underground: Infill resource drilling into the down-plunge portion of the Eastern Lens intersected consistent zones of exceptionally thick, high-grade mineralisation, including another standout +50m intersection in drillhole SSD156 (50m @ 2.9% CuEq1). As outlined in previous announcements, the thickness of the mineralisation intersected within the Eastern Lens continues to exceed the current mineralisation interpretation and the Company's expectations. Significant intersections from the East Lens include: 50m @ 2.9% CuEq1 (0.7% Cu, 6.0% Zn, 17.1 g/t Ag & 0.1 g/t Au) from 284m (SSD156; East Lens) - 33m @ 4.6% CuEq1 (0.9% Cu, 9.6% Zn, 37.8 g/t Ag & 0.1 g/t Au) from 276m (SSD171; East Lens) - Including 4m @ 9.0% CuEq1 from 296m - 36m @ 2.9% CuEq1 (0.5% Cu, 6.4% Zn, 31.3 g/t Ag & 0.2 g/t Au) from 351m (SSD160; East Lens) - 25m @ 3.0% CuEq1 (0.6% Cu, 6.3% Zn, 39.0 g/t Ag & 0.3 g/t Au) from 250m (SSD173; East Lens) - 34m @ 1.5% CuEq1 (0.6% Cu, 2.5% Zn, 18.7 g/t Ag & 0.1 g/t Au) from 272m (SSD158; East Lens) - 10m @ 4.1% CuEq1 (0.4% Cu, 9.5% Zn, 32 g/t Ag & 0.2 g/t Au) from 320m (SSD175; East Lens) - 14m @ 2.9% CuEq1 (0.1% Cu, 7.2% Zn, 89.8g/t Ag & 0.5 g/t Au) from 364m (SSD172; East Lens) - 20m @ 1.4% CuEq1 (0.3% Cu, 2.9% Zn, 15.1 g/t Ag & 0.1 g/t Au) from 310m (SSD164; East Lens) - And 2m @ 2.8% Cu from 334m.

The true widths of the `Underground' Eastern Lens infill resource drilling intercepts reported are estimated to be approximately 85-95% of the downhole widths. Infill resource drilling into the down-plunge portion of the Western Lens intersected a new zone of thick, high-grade hangingwall-hosted zinc-silver mineralisation in hole SSD169 (25m @ 8.9% Zn & 39.6 g/t Ag). The new high-grade Zn-Ag zone is completely open down plunge/dip.

Future drilling will target extensions to this zone and other opportunities at depth. Significant intersections from the Western Lens, include: 23m @ 5.2% CuEq1 (0.3% Cu, 12.6% Zn, 32.3 g/t Ag & 0.2 g/t Au) from 244m (SSD137; West Lens) - 25m @ 3.7% CuEq1 (0.2% Cu, 8.9% Zn, 39.6 g/t Ag & 0.3 g/t Au) from 294m (SSD169; hangingwall Zinc) - And 21m @ 1.0% CuEq1 from 368m - 28m @ 2.7% CuEq1 (1.6% Cu, 3.3% Zn, 12.2 g/t Ag & 0.1 g/t Au) from 195m (SSD126; West Lens) - 20m @ 1.8% CuEq1 (0.2% Cu, 4.0% Zn & 17.1 g/t Ag) from 250m (SSD136; West Lens) - And 12.0m @ 1.1% CuEq1 (2.6% Zn, 22.0 g/t Ag & 0.1 g/t Au) from 228m - And 3.0m @ 3.0% Cu from 280m - 20m @ 1.2% CuEq1 (1.2% Cu, 0.3% Zn & 4.6 g/t Ag) from 67m (SSD110; West Lens) - 25m @ 0.7% CuEq1 (0.7% Cu, 0.1% Zn, 5.0 g/t Ag & 0.3 g/t Au) from 48m (SSD109; West Lens) - And 11.2m @ 1.1% CuEq1 (0.7% Cu, 1.3% Zn & 5.1 g/t Ag) from 75.6m - 11m @ 1.0% CuEq1 (0.8% Cu, 0.7% Zn & 9.0 g/t Ag) from 317m (SSD161; West Lens) - 3m @ 3.0% CuEq1 (0.2% Cu, 7.3% Zn, 31.7 g/t Ag & 0.2 g/t Au) from 317m (SSD139; West Lens) - And 8.2m @ 1.6% CuEq1 (0.4% Cu, 3.2% Zn & 2.6 g/t Ag) from 299.8m. The true widths of the `Underground' Western Lens infill resource drilling intercepts reported are estimated to be approximately 65-85% of the downhole widths.