ORBMINCO LIMITED — Capital/Financing Update 2022

Apr 20, 2022

21 April 2022

ASX ANNOUNCEMENT

Drilling Update – Mt Venn

Further to the Company’s ASX Announcement dated 1 April 2022, Woomera Mining Limited (ASX: WML) ( Woomera or the Company ) is pleased to announce that the ~2,000m Reverse Circulation (RC) drilling program at its 80% owned Mt Venn JV Project has commenced.

Mt Venn Ni-Cu-PGE Project

Planned Drilling

Woomera’s Mt Venn Project covers 50km of continuous strike within the underexplored Mt Venn Greenstone Belt located in the NE Goldfields of WA, 40km west of the world-class Gruyere Gold Project.

Nickel and copper sulphide mineralisation was intersected in two RC holes at the Mt Cornell prospect (Figure 1), including 11m at 0.34% Ni and 0.42% Cu from 41-52m in MVRC064 and 5m at 0.31% Ni and 0.65% Cu from 94-99m in MVRC065 (see ASX Release dated 10 December 2021).

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Figure 1: Section showing proposed drilling at Mt Cornell

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The ~2,000m infill drilling program is designed to test for thick, high grade extensions of the previously reported disseminated and massive Ni-Cu sulphide mineralisation including a potentially 500m-long mineralised strike between the three holes.

This ASX announcement has been approved and authorised for release by the Board of Woomera Mining Ltd.

For further information please contact:

Ian Gordon Luke Forrestal (Media Relations) Duncan Gordon (Investor Relations) Chairman Director, Financial Communications Executive Director Woomera Mining Limited GRA Partners Adelaide Equity Partners + 61 477 306 669 +61 411 479 144 + 61 404 006 444

About Woomera Mining Limited

Woomera Mining Limited is a focussed mineral explorer. The Company is exploring for battery metals (lithium nickel, copper + PGE’s) and gold in the Yilgarn and Pilbara Cratons of Western Australia plus the Musgrave Province in South Australia along with copper-gold mineralisation in the Gawler Craton of South Australia.

COMPETENT PERSONS STATEMENT

The exploration results reported herein, insofar as they relate to mineralisation, are based on information compiled by Mr Kevin Seymour. Mr Seymour is the Principal of Seymour Rock Consulting Pty Ltd and is a Member of the AusIMM and AIG with over thirty years of experience in the field of activity being reported. Mr Seymour is a shareholder of Woomera Mining Limited and in his capacity as a Consulting Geologist to Woomera Mining Limited has sufficient experience which is relevant to the styles of mineralisation and types of deposits under under consideration and to the activity that he is undertaking to qualify as a Competent Person as defined in the 2012 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’ relating to the reporting of Exploration Results. Mr Seymour consents to the inclusion in the report of matters based on his information in the form and context in which it appears.

FORWARD LOOKING STATEMENTS

Certain statements in this document are or maybe “forward-looking statements” and represent Woomera’s intentions, projections, expectations or beliefs concerning among other things, future exploration activities. The projections, estimates and beliefs contained in such forward-looking statements necessarily involve known and unknown risks, uncertainties and other factors, many of which are beyond the control of Woomera, and which may cause Woomera’s actual performance in future periods to differ materially from any express or implied estimates or projections. Nothing in this document is a promise or representation as to the future. Statements or assumptions in this document as to future matters may prove to be incorrect and differences may be material. Woomera does not make any representation or warranty as to the accuracy of such statements or assumptions.

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PREVIOUSLY REPORTED INFORMATION

Information in the announcement may reference previously reported exploration results extracted from the Company’s announcements. For the purposes of ASX Listing Rule 5.23 the Company confirms that it is not aware of any new information or data that materially affects the information included in the original announcement and that all material assumptions and technical parameters underpinning the estimates in the original announcements continue to apply and have not materially changed.

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