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

Tenement holder · Western Australia

POSEIDON NICKEL PTY LIMITED

POSEIDON NICKEL PTY LIMITED holds 53 current Western Australian mining tenements (18 mining leases, 4 general purpose leases, 26 miscellaneous licences, 2 exploration licences, 3 prospecting licences and mineral claims) covering 41,362 hectares; part of the Maritana Minerals group.

53tenements

41,362hectares

6projects

0EPA statements

3closure plans

Open POSEIDON NICKEL PTY LIMITED in the MCF Mining Index All holders

Parent group: Maritana Minerals

Projects (MINEDEX)

Project	Stage	Owners (MINEDEX)	Its tenements
Gordon - Sirdar	Operating	FMR INVESTMENTS PTY LIMITED 100%	1
Silver Swan - Black Swan	Care and Maintenance	Maritana Minerals Limited 100%; Poseidon Nickel Pty Limited	12
Windarra / Poseidon	Care and Maintenance	Maritana Minerals Limited 100%; Poseidon Nickel Pty Limited	12
Lake Johnston / Forrestania	Care and Maintenance	Forrestania Resources Limited 100%; Poseidon Nickel Pty Limited	11
Windarra Gold Tailings	Proposed	Maritana Minerals Limited 100%; Poseidon Nickel Pty Limited; GTI Resources Ltd; a private holder; Encore Minerals Pty Ltd	7
Black Swan	Not Applicable	Maritana Minerals Limited 100%; Poseidon Nickel Pty Limited	1

Rehabilitation liability

Its rehabilitation liability, per tenement and in total, is in the MCF Mining Index (subscribers): the Mining Rehabilitation Fund estimate, its trend since 2014, company provisions and closure-plan costs.

Mine closure plans

Site	Operator	Latest plan approved	Plan (PDF on GeoDocs)
Mine Closure Plan Poseidon Nickel Limited Black Swan Operations	Poseidon Nickel LIMITED
Lake Johnston Operations	Norilsk Nickel Lake Johnston Pty Limited, Lake Johnston Ltd	16 July 2015	Lake Johnston Operations Mine Closure Plan 2014
MINE CLOSURE PLAN - LAKE JOHNSTON / POSEIDON PROJECT - J01666	Poseidon Nickel LIMITED

Recent changes

Date	Tenement	Change	Detail	Holder
14 October 2026	P 16/3263	POSEIDON NICKEL PTY LIMITED	a private holder -> POSEIDON NICKEL PTY LIMITED	POSEIDON NICKEL PTY LIMITED

Tenements

Tenement	Holder	Status	Expires	Commodities	Project	Hectares
M 27/39 Mining lease	POSEIDON NICKEL PTY LIMITED	Granted	29 October 2028	Nickel, Cobalt	Silver Swan - Black Swan	11
M 27/200 Mining lease	POSEIDON NICKEL PTY LIMITED	Granted	24 January 2037	Nickel, Cobalt, Gold	Silver Swan - Black Swan	930
M 27/214 Mining lease	POSEIDON NICKEL PTY LIMITED	Granted	7 July 2039	Nickel, Cobalt	Silver Swan - Black Swan	928
M 27/216 Mining lease	POSEIDON NICKEL PTY LIMITED	Granted	7 July 2039	Nickel, Cobalt	Silver Swan - Black Swan	992
M 38/1244 Mining lease	POSEIDON NICKEL PTY LIMITED	Granted	13 November 2029	Nickel, Copper, Gold	Windarra / Poseidon	185
M 38/1245 Mining lease	POSEIDON NICKEL PTY LIMITED	Granted	13 November 2029	Nickel, Copper, Gold	Windarra / Poseidon	112
M 39/1075 Mining lease	POSEIDON NICKEL PTY LIMITED	Granted	28 October 2033	Nickel, Copper	Windarra / Poseidon	356
M 63/163 Mining lease	POSEIDON NICKEL PTY LIMITED	Granted	26 October 2029	Nickel, Cobalt, Copper	Lake Johnston / Forrestania	928
M 63/282 Mining lease	POSEIDON NICKEL PTY LIMITED	Granted	15 March 2037	Nickel, Cobalt, Copper	Lake Johnston / Forrestania	976
M 63/283 Mining lease	POSEIDON NICKEL PTY LIMITED	Granted	15 March 2037	Nickel, Copper, Cobalt	Lake Johnston / Forrestania	982
M 63/284 Mining lease	POSEIDON NICKEL PTY LIMITED	Granted	10 August 2036	Nickel, Cobalt	Lake Johnston / Forrestania	36
M 63/292 Mining lease	POSEIDON NICKEL PTY LIMITED	Granted	7 April 2041			334
M 63/293 Mining lease	POSEIDON NICKEL PTY LIMITED	Granted	17 February 2029			344
M 63/294 Mining lease	POSEIDON NICKEL PTY LIMITED	Granted	17 February 2029			105
M 63/522 Mining lease	POSEIDON NICKEL PTY LIMITED	Granted	22 June 2030			364
M 63/523 Mining lease	POSEIDON NICKEL PTY LIMITED	Granted	22 June 2030			990
M 63/524 Mining lease	POSEIDON NICKEL PTY LIMITED	Granted	22 June 2030	Nickel	Lake Johnston / Forrestania	966
M 261SA Mining lease (State Agreement)	POSEIDON NICKEL PTY LIMITED	Granted	10 December 2027	Nickel, Gold, Copper	Windarra / Poseidon	6,022
G 27/2 General purpose lease	POSEIDON NICKEL PTY LIMITED	Granted	8 September 2040			205
G 38/21 General purpose lease	POSEIDON NICKEL PTY LIMITED	Granted	27 December 2036	Nickel, Gold, Copper	Windarra / Poseidon	4
G 63/5 General purpose lease	POSEIDON NICKEL PTY LIMITED	Granted	13 May 2028	Nickel, Cobalt	Lake Johnston / Forrestania	9
G 63/8 General purpose lease	POSEIDON NICKEL PTY LIMITED	Granted	5 December 2037	Nickel, Cobalt	Lake Johnston / Forrestania	81
L 24/219 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	25 August 2037	Nickel, Cobalt	Silver Swan - Black Swan	13
L 24/222 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	25 August 2037	Nickel, Cobalt	Silver Swan - Black Swan	28
L 27/57 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	19 February 2027	Nickel, Cobalt	Silver Swan - Black Swan	100
L 27/58 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	19 February 2027	Nickel, Cobalt	Silver Swan - Black Swan	1
L 27/59 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	21 May 2027	Nickel, Cobalt	Silver Swan - Black Swan	10
L 27/74 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	26 June 2047	Nickel, Cobalt	Silver Swan - Black Swan	307
L 27/75 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	19 October 2047	Nickel, Cobalt	Silver Swan - Black Swan	449
L 27/77 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	19 November 2028	Nickel, Cobalt	Silver Swan - Black Swan	768
L 27/78 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	16 August 2033	Gold, Silver	Gordon - Sirdar	73
L 27/95 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	19 July 2042			3,922
L 27/96 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	2 March 2043			8,509
L 38/118 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	11 June 2029	Nickel, Copper	Windarra / Poseidon	435
L 38/119 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	8 April 2029	Nickel, Copper	Windarra / Poseidon	389
L 38/121 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	20 July 2029	Nickel, Copper	Windarra / Poseidon	2,314
L 38/122 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	20 July 2029	Nickel, Copper	Windarra / Poseidon	3,707
L 38/199 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	13 October 2032	Nickel, Gold, Copper	Windarra / Poseidon	282
L 38/218 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	27 September 2033			41
L 38/220 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	6 December 2033	Nickel, Gold, Copper	Windarra / Poseidon	16
L 38/402 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Application				5
L 39/184 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	20 January 2029	Nickel, Copper, Gold	Windarra / Poseidon	19
L 39/221 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	4 March 2034			16
L 39/224 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	25 November 2034			36
L 63/51 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	6 August 2042	Nickel, Cobalt	Lake Johnston / Forrestania	342
L 63/52 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	1 August 2042	Nickel, Cobalt	Lake Johnston / Forrestania	254
L 63/55 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	3 March 2046	Nickel, Cobalt	Lake Johnston / Forrestania	25
L 63/57 Miscellaneous licence	POSEIDON NICKEL PTY LIMITED	Granted	7 March 2027	Nickel, Cobalt	Lake Johnston / Forrestania	1
E 27/758 Exploration licence	POSEIDON NICKEL PTY LIMITED	Application				590
E 63/1784 Exploration licence	ESSENTIAL METALS PTY LTD; POSEIDON NICKEL PTY LIMITED	Granted	12 October 2027			2,463
P 16/3263 Prospecting licence	POSEIDON NICKEL PTY LIMITED	Granted	21 March 2029			188
P 27/2589 Prospecting licence	POSEIDON NICKEL PTY LIMITED	Granted	9 April 2029			74
P 27/2621 Prospecting licence	POSEIDON NICKEL PTY LIMITED	Granted	8 February 2030			125