Data as at 18 October 2026 · from Western Australian Government registers and open data

Western Australian mining lease

M 38/58 · Mt Weld REE / Lynas

M 38/58 is a Western Australian mining lease held by MT WELD MINING PTY LIMITED (Lynas Rare Earths group). Granted 20 November 1984, expires 25 November 2026. 928 ha in the Mount Margaret Mineral Field. Commodities: Rare earths, Niobium, Tantalum, Yttrium, Neodymium, Praseodymium. Part of the Mt Weld REE / Lynas project (operating).

Type: Mining lease
Status: Granted
Holder: MT WELD MINING PTY LIMITED
Parent group: Lynas Rare Earths (a subsidiary)
MINEDEX projects: Mt Weld REE / Lynas J00772 · Operating
Owners: Lynas Rare Earths Limited 100%

Mt Weld Phosphate J01070 · Not Applicable
Owners: Lynas Rare Earths Limited 100%
Lodged: 18 August 1984
Granted: 20 November 1984
Expires: 25 November 2026
Area: 928.00 hectares (9.3 km²)
Mineral field: Mount Margaret Mineral Field
Commodities: Rare earths, Niobium, Tantalum, Yttrium, Neodymium, Praseodymium
Rehabilitation liability: Its rehabilitation liability is in the MCF Mining Index (subscribers): the Mining Rehabilitation Fund estimate, its trend since 2014, company provisions and closure-plan costs
Mine closure plan: TSF 3 and Production Expansion Mt Weld Rare Earth Project: approved 7 February 2018, TSF 3 and Production Expansion Mining Proposal Mt Weld Rare Earth Project
Mt Weld Rare Earths Project : approved ,
Environmental registrations: 15 mining proposal and closure plan registrations (MINEDEX)
EPA Ministerial Statements: MS 1181, MS 476
EPA referred proposals: Wallaby Gold Mine Project Approved (Ministerial Statement), MS 551; overlaps 41 ha
Mt Weld Rare Earths Project - Life of Mine Proposal Approved (Ministerial Statement), MS 1216; overlaps 928 ha
Rare Earths Mining and Beneficiation At Mt Weld, Laverton and Secondary Processing At Meenaar, near Northam Approved (Ministerial Statement), MS 476; overlaps 287 ha
WAMEX data: 358 open-file drill holes, 123 exploration reports on this ground
Location: -28.8609, 122.53485 (centre)

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Mining proposals and mine closure plans

Date	Registration	Title	Status	Document (GeoDocs)
19 July 2024	Mining Proposal	Mining Proposal	Approved	MP_126918.pdf
22 December 2023	Mining Proposal	Mt Weld Mining Limited TSF4 and Mine Expansion Mining Proposal Version 1.1	Approved	MP_117820.pdf
9 July 2021	Mining Proposal	Mt Weld Rare Earths Project Stage 4 Mining Proposal Rev 2	Approved	MP_96627.pdf
7 February 2018	Mining Proposal With Mine Closure Plan	TSF 3 and Production Expansion Mining Proposal Mt Weld Rare Earth Project	Approved	mp_71255.pdf
8 September 2016	Mine Closure Plan	Mt Weld Rare Earths Project	Approved	no public document
11 March 2016	Mining Proposal	Mt Weld Rare Earths Project Mining Proposal: TSF2 Modification	Approved	mp_58538.pdf
11 September 2015	Mining Proposal	Mining Proposal Amendment: Tailings Storage Facility 2	Approved	mp_55867.pdf
6 March 2015	Mining Proposal	Mount Weld Mining 2015 Mining Campaign 2	Approved	mp_53140.pdf
14 July 2014	Mining Proposal	MWM: Tailings Storage Facility and Tailings Dewatering System on M38/58	Approved	mp_47342.pdf
16 January 2014	Mining Proposal	Mount Weld Rare Earths Project, Mining Proposal: Process Water Pond on M38/58	Approved	mp_43620.pdf
23 April 2012	Mining Proposal With Mine Closure Plan	Mt Weld Rare Earth Project - Stage 2 Expansion Revised Mining Proposal - Part 1 M38/326, L38/98, M38/58, M38/59, M38/327	Approved	mp_33811.pdf
6 October 2011	Mining Proposal	Mt Weld TSF Upgrade Phase 2 Mining Proposal	Approved	mp_31872.pdf
10 May 2011	Mining Proposal	MP - Proposed Design Changes to Tailings Storage Facility - MT WELD RARE EARTHS PROJECT	Approved	mp_30446.pdf
30 April 2008	Mining Proposal	MT WELD REE - CLEARING OF VEGETATION M38/58 M38/59 M38/326	Approved	mp_19361_res.pdf
30 March 2007	Mining Proposal	MT WELD REE : EARTHS PROJECT M38/58 M38/59 M38/326 L38/98	Approved	mp_5573.pdf mp_5573.zip

Registrations from MINEDEX (DMPE); the documents are the operators' own, linked on GeoDocs and not copied.