Wiluna Gold Mine

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Wiluna Gold Mine
Wiluna Mill.jpg
Wiluna Mill before the 2008-09 upgrade
Wiluna Gold Mine is located in Australia
Wiluna Gold Mine
Location in Australia

26°37′S 120°15′E / 26.61667°S 120.25°E / -26.61667; 120.25Coordinates: 26°37′S 120°15′E / 26.61667°S 120.25°E / -26.61667; 120.25
Location Wiluna
State Western Australia
Country Australia
Owner
Company APEX Minerals
Website APEX website
Year of acquisition 2007
ASX AXM
Production
Financial year 2010–11
Ounces of Gold 68,049
History
Opened 1896
Active 1896–1920
1924–1947
1987–2007
2009–present

The Wiluna Gold Mine is an active gold mine in Western Australia near the town of Wiluna. The mine was active from 1984 till its closure in 2007; when it was put into care and maintenance; and again since late 2008.

After commissioning from its recent upgrade the mine should have resumed full operations before the end of 2008; however, delays in the comissoning had forced the owner, APEX Minerals, to raise more money and postpone this date.[1] The company announced on 5 March 2009 that full production had resumed.[2]

The mine is located on the native title of the Ngaanyatjarra aboriginal people.[3]

Contents

[edit] Overview

Mining in the Wiluna-Leinster area.

The mine consists of several open pits, the largest being East Pit which was mined until July 2007 and again in late 2008 and early 2009, and three underground operations. Two of those, Happy Jack and East Lode, are older workings, the third, Bulletin decline was also mined until July 2007 and has since reopened. Bulletin and its extensions, Calais and Woodley decline were the sites of an underground drilling program during the mines closure in 2007 and 2008. There was then approx. 15 km of underground workings at the mine. Most of the open pits are flooded with salt water. Only one of them, the small Caledonia Pit, contains fresh water. It is home to long neck turtles and yabbies (a fresh water crustacean).

The current owner, Apex Minerals, upgraded and reopened the mine in November 2008. It originally also planned to transport ore to the Wiluna plant from its other mine sites, the Gidgee Gold Mine (approx. 150 km south) and the Youanmi Gold Mine (approx. 300 km south).[4] After having postponed this plan in 2009, APEX reconsidered this option in September 2009, when its Wiluna-focused strategy failed.[5]

Williamson pit, an open pit in the dry salt lake of Lake Way, was also mined by Agincourt until early 2007 but is now abandoned. The mining lease was still with Oxiana Limited after the sale of Wiluna, Oxiana having had plans to mine rich uranium deposits there through Toro Energy Limited in the foreseeable future. There are other mining companies that were carrying out exploration in the Wiluna area too, notably for nickel and iron ore. There is also an older mine site approximately 25 km south of Wiluna, along the road to Leinster, called Wiluna South or Matilda Mine. It was operated for about 10 years until 1989 by Chevron. Apart from a couple of old pits and tailings dams there is little remaining of the old site.

One of the few historical buildings from the earlier days of mining is the old Mine Managers Lodge, currently a private residence. There also is some old equipment on display at the visitors' car park, notably an old crusher and an old mill. The Wiluna area was extensively mined from the discovery of gold there in 1896 till the end of World War II when mining ceased.

Just before entering Wiluna from the south, a wooden building on the right-hand side is the old railway station's shed. In front of it, the railway dam can still be seen but the tracks which once went all the way to Leinster have been removed.

The mine is connected to Perth through flights out of Wiluna Airport and serviced by Maroomba Airlines.

[edit] Mine history

[edit] Discovery

In 1896, gold was discovered in the region, which was then known as Lake Way, by three prospectors, George Woodley, James Wotton and Jimmy Lennon.[6]

On 29 December 1897, a 460 ounce nugget was found in Wiluna, then the largest found in the colony of Australia. The location it was found at was later to become the spot for the power house of the Wiluna Gold Mine Limited, the operators of the early mine.[7]

The town prospered from the development of the mine until the First World War. In 1920 however, a decline set in because the refractory ore could not be treated. As a consequence, the town's population shrank to less than 150 people.[6]

[edit] Second phase

In 1924, Claude de Bernales floated a company that would undertake a drilling program and the Wiluna mine was revived. By 1939, the town had grown to a population of 9,000 thanks to the employment the mine provided.[6]

With the outbreak of the Second World War, Wiluna started to decline once more as the men had to join the Services. The mine lasted for some more years until 1947, when all machinery was sold off and Wiluna went into a form of hibernation.[8]

[edit] Third phase

The third reincarnation of Wiluna mines, after 1896 and 1924, started in the early 1980s. Unlike the previous two before, the town did not profit from it as much. Fly-in fly-out rosters meant, there was no significant population growth.[8] From 1987 to 1994, oxide ore was mined from open pit operations; from 1994 onwards, underground operations commenced.[9]

On 21 August 1997, Great Central Mines made an offer for Wiluna Mines Limited, owner of Wiluna at the time. This offer closed on 10 October 1997 and was followed by a second offer, lasting until the 2 January 1998. GMC acquired the necessary 90% acceptance in the second offer and moved to compulsory acquisition on 5 January 1998.[10]

The mine went through a number of owners during this time, being sold in package with the Bronzewing Gold Mine and the Jundee Gold Mine when Great Central Mines was taken over by Normandy Mining in June 2000. Normandy, in turn, was taken over by the Newmont Mining Corporation in February 2002.[11]

[edit] Agincourt

[edit] 2003–2007

Agincourt Resources logo

Having gone through a number of owners in its time, the Wiluna mine was owned by the Agincourt Resources since December 2003. Gowit Limited purchased Agincourt Resources, and thereby the mine, on 10 December 2003 from the previous owner, Newmont for shares and $3.65 million in cash.[12][13] Newmont later acquired almost 20% of Agincourt when it sold its Martabe mine to the later in July 2006.[14]

Wiluna underground portal

A fatality occurred at the mine when, on Friday, 1 July 2005, an employee of Mining and Civil Australia Pty Ltd was killed at the Williamson pit. The man was crushed while helping to jump-start a truck.[15]

Agincourt was bought out in April 2007 by Oxiana Limited. The acquisition brought Oxiana the Martabe gold project in Indonesia, the Wiluna Gold Mine, a 57% interest in Nova Energy Limited, a listed uranium explorer, and numerous exploration properties.[16] Oxiana offered 0.65 of its shares for every Agincourt share,[12] a deal worth $415 million.[17] Oxiana in turn sold on the Wiluna Gold Mine in July 2007, making them the shortest owner of the site.[18]

At the time of the purchase of the mine by Oxiana, it had only one year of mine life left and approx. 300,000 ounces of gold in reserves.[14]

[edit] APEX

[edit] 2007

Having purchased the mine in July 2007 for A$ 29.5 million and placed it into care and maintenance from then on, APEX carried out an assessment of the necessary upgrades required to Wiluna for its three-mine strategy.

[edit] 2008

On 19 March 2008, APEX announced the raising of $62 million to fund the company’s program to resume gold production at the Wiluna Gold Mine by the end of 2008.[19] The company announced a loss in excess of $60 million for the financial year up to 30 June 2008. Despite the loss, it paid out a bonus of $100,000 to each of its three executive directors, increasing their combined wage, including options, from $1,086,861 (2006–07) to $2,715,923 (2007–08).[20]

The company raised a further $58.5 million in September 2008 to be able to continue its projects. Of this, $30 million were earmarked for exploration activities while the remainder was to go towards protecting the company from the exposure to the Australian dollar gold price and the start up of its operations, which were scheduled for Wiluna for October 2008, for Gidgee in February 2009 and for Youanmi in the second half of 2009. Production for the 2009 calendar year was scheduled at 150,000 ounces, rising to 200,000 the following year.[21]

Wiluna East Pit

Delays in the commissioning of the mills were announced on 9 December 2008, making a start of full production in 2008 impossible; however full throughput was achieved. The difference between full production and full throughput is the large residence time required by the BIOX process.[22] Apex announced its first gold pour on 22 December 2008. To compensate for these delays, APEX announced on 27 January 2009 the raising of a further $20 million to cover the shortfall in revenue,[1] bringing the overall figure of investment in Wiluna and related projects to $140 million. This was achieved by issuing a further 72.5 million shares. It further declared that production had reached 7,000 ounces per month and would ramp up to the expected 120,000 ounces per year in February 2009.[1] APEX also considered the option to claim certain amounts of the costs involved in the upgrade from the previous owner, formerly Oxiana, now OZ Minerals.[1] In May 2010, APEX reached a settlement with OZ Minerals, receiving $3 million in compensation.[23]

In its quarterly activities report for the three month up to end of December 2008, the company declared a gold production of 385 ounces.[24] In March 2009 the company announced that it had reached full production, averaging 290 ounces of Gold per day for February.[2]

[edit] 2009

APEX announced yet another capital raising on 18 May 2009, receiving $28 million through share placement and increasing the money invested in the Wiluna project to $168 million. APEX stated lower than expected production in their underground operations as their reason for this further capital raising.[25]

For the second quarter of 2009, the company declared it had reached its production target of 30,000 ounces of gold per month. Its cash costs however where at $952,[26] almost $400 above the company's target of $560.[27][28] APEX projected that it could cut production costs per ounce by $40 for every additional 1,000 ounces produced each month.[29] While the mining operations in Wiluna itself in the June 2009 quarter achieved a profit of $9,995,000, the company suffered an over-all loss of $113,762,000 for the 2008–09 tax year.[26]

In a low-key announcement on 31 July 2009, APEX declared that Glenn Jardine, Director of operations, had resigned from his position without stating any reasons for his departure.[30]

On 22 September 2009, APEX declared a trading halt to its shares and the possibility that it may go into voluntary suspension of trading to receive enough time to complete another capital raising.[31] After having deviated from its original three-mine strategy and only processed ore from the Wiluna operations, leaving the Gidgee and Youanmi operations in care and maintenance, the company now decided to return to multiple feed for its Wiluna processing facility, the one feed strategy having failed. To achieve this, it raised enough money to cover its debt and regain $50 million in working capital. With its current debt level estimated to be around $60 million, the company had to raise another $110 million, bringing its investment into its gold mining operations to around $300 million.[5][32]

[edit] 2010

APEX returned to its previously abandoned strategy of sourcing ore from Gidgee as well as Wiluna for its processing facility. It planned to commence mining at Gidgee once more in March 2010 and transport ore to Wiluna.[33] In late December 2009, APEX announced a further delay with the development of the Gidgee mine because of the need of an upgrade of the Gidgee - Wiluna road. APEX anticipated that mining could be delayed another two or three month,[34] but, as of the end of July 2010, no further mention of the Gidgee mine being reopened has been made.[35] APEX put up its Younami mine for sale in April 2010, abandoning its strategy to source ore from there for the Wiluna mine.[36]

The company announced a trading halt on 4 August 2010, in the wake of a loss of A$20 per ounce of gold produced in the June quarter, despite cutting costs and boosting production at the Wiluna mine. APEX, cash strapped and feared to be teetering on the brink of collapse, planned to raise A$5 million through another capital raising.[37] The company issued 250 million new shares at 2 cent per share and resumed trading on the 6 August.[36]

After continued loses at the operation, the mine achieved a profitable quarter in late 2010, being able to reduce operating cost to below A$900 per ounce for the first time. It also increased cash reserves from A$180,000 to over one million.[38]

[edit] 2011

On 27 January APEX announced a trading halt for the purpose of yet another capital raising, an asset sale and a restructuring.[39] The company sold the Gidgee Gold Mine to Panoramic Resources, with APEX retaining the rights to the Wilson deposit. Panoramic purchased the mine for A$15.5 million.[40] It also raised A$22.6 million through a share placement.[41]

After continuous production improvements in 2010, the first quarter in 2011 was a disappointment, with lower production and grade figures and higher operating costs.[42] Reasons for the slip in production were power outages, reduced availability of underground hauling and loading equipment and rain affecting the operation.[43]

[edit] BIOX process

The BIOX process is a pretreatment process for refractory gold ores or concentrates, using naturally occurring bacteria to break down the sulphide ore and liberate the gold for subsequent cyanidation. The advantage of the BIOX process is its environmental friendliness.[44] BIOX was first commercially used in 1988 and the Wiluna plant was installed in 1993.[45]

[edit] Production

[edit] 1984 to 2007

Pre-APEX production figures were:[46]

Year Production Grade Cost per ounce
1997-98 [47] 83,782 ounces 8.25 g/t A$353
1998-99 [48] 134,704 ounces 7.77 g/t US$208
1999 [9] 131,470 ounces
2000 117,974 ounces 6.47 g/t A$ 335
2001 117,360 ounces 5.53 g/t A$ 423
2002 [9] 117,415 ounces
2002-03
2003-04 1 [49] 67,756 ounces
2004-05 [50] 111,280 ounces A$494
2005-06 [50] 113,607 ounces
2006 2 [51] 48,024 ounces A$687
  • 1 December 2003 (sale of mine to Agincourt) to June 2004 only.
  • 2 July to December 2006 only.
  • Mine closed in July 2007.

[edit] 2008 onwards

Since resumption of production in December 2008, the company has announced the following production figures:

Quarter Production Grade Cost per ounce
Fourth Quarter 2008 [27] 385 ounces 3.65 g/t not announced
First Quarter 2009 [52] 17,137 ounces 4.15 g/t not announced
Second Quarter 2009 [26] 26,080 ounces 5.04 g/t A$ 952
2008-09 [33] 44,000 ounces 4.54 g/t A$ 952
Third Quarter 2009 [53] 19,900 ounces 3.7 g/t A$ 1,222
Fourth Quarter 2009 [54] 18,369 ounces 3.7 g/t A$ 1,089
First Quarter 2010 [55] 14,100 ounces 3.6 g/t A$ 1,485
Second Quarter 2010 [35] 16,307 ounces 4.29 g/t A$ 1,374
2009-10 [35] 68,629 ounces 3.79 g/t A$ 1,276
Third Quarter 2010 [56] 19,300 ounces 5.35 g/t A$ 1,250
Fourth Quarter 2010 [38] 19,500 ounces 6.00 g/t A$ 890
First Quarter 2011[42] 15,099 ounces 4.31 g/t A$ 1,044
Second Quarter 2011[57] 14,100 ounces 4.55 g/t A$ 1,300
2010-11 [57] 68,049 ounces 5.06 g/t A$ 1,120

[edit] Owners

Company From To
Barrack Mines May 1984 January 1991
Asarco Gold January 1991 January 1994
Wiluna Mines January 1994 December 1997
Great Central Mines December 1997 April 2000
Normandy Mining April 2000 February 2002
Newmont Australia February 2002 December 2003
Agincourt Resources December 2003 April 2007
Oxiana Limited April 2007 July 2007
APEX Minerals NL July 2007 present

[edit] Further reading

  • Phil R. Heydon: Wiluna: Edge of the Desert (ISBN 0859052168), published: 1996, publisher: Hesperian Press

[edit] References

  1. ^ a b c d APEX Minerals website AXM announcement from 27 January 2009, accessed: 27 January 2009
  2. ^ a b APEX shareholder update published: 5 March 2009, accessed: 9 March 2009
  3. ^ NATIONAL NATIVE TITLE TRIBUNAL 16 January 2007, accessed: 26 September 2009
  4. ^ AAP. "Apex acquires Wiluna mine for $29.5m". ninemsn. http://news.ninemsn.com.au/article.aspx?id=274176. Retrieved 2007-11-01. 
  5. ^ a b Apex hits up investors for $100m more to fix Wiluna, The West Australian – Business section, page: 52, published: 23 September 2009, accessed: 23 September 2009
  6. ^ a b c Wiluna – Edge of the desert, author: Phil Heydon, publisher: Hesperian Press, published: 1996, page: IV, accessed: 23 March 2003
  7. ^ Wiluna – Edge of the desert, author: Phil Heydon, publisher: Hesperian Press, published: 1996, page: 15, accessed: 23 March 2003
  8. ^ a b Wiluna – Edge of the desert, author: Phil Heydon, publisher: Hesperian Press, published: 1996, page: V, accessed: 23 March 2003
  9. ^ a b c GOI's ann: Acquisition of Wiluna Gold Mine ASX announcement, published: 20 October 2003, accessed: 26 September 2009
  10. ^ Compulsory acquisition notices dispatched re Wiluna Mines GMC ASX announcement, published: 5 January 1998, accessed: 14 February 2010
  11. ^ View Project Owners: Jundee - Nimary accessed: 19 December 2009
  12. ^ a b Delisted.com.au: Agincourt Resources accessed: 26 December 2009
  13. ^ AUSTRALIA'S GOWIT TO ACQUIRE WILUNA GOLD MINE highbeam.com, published: 21 October 2003, accessed: 26 September 2009
  14. ^ a b Oxiana bids $415m for rival The Sydney Morning Herald, published: 30 January 2007, accessed: 26 September 2009
  15. ^ "Fatality at Wiluna gold mine". DOCEP. 2005-07-05. http://www.docep.wa.gov.au/corporate/Media/statements/2005/July/Fatality_at_Wiluna_g.html. Retrieved 2008-03-29. 
  16. ^ Oxiana annual report 2007 accessed: 26 September 2009
  17. ^ Australia's Oxiana makes 415 mln aud scrip offer for Agincourt Resources abcmoney.com.uk, published: 29 January 2007, accessed: 26 September 2009]
  18. ^ "Agincourt takeover bid closes" (PDF). Oxiana Limited. Archived from the original on 2007-08-31. http://web.archive.org/web/20070831222912/http://www.oxiana.com.au/_data/docs/announcements/2007/070416_asx+letter_close+of+offer.pdf. Retrieved 2007-11-02. 
  19. ^ Mark Ashley. "APEX ANNOUNCES PLACEMENT TO RAISE $62 MILLION" (PDF). APEX Minerals. http://www.apexminerals.com/reports/ASXAnnouncement-200803-ApexPlacement.pdf. Retrieved 2008-03-19. 
  20. ^ APEX annual report 2007-08 page: 77, published: 24 October 2008, accessed: 9 March 2009
  21. ^ $60.5 million capital raising APEX Minerals website – ASX announcement from 29 September 2008, accessed: 23 September 2009
  22. ^ WILUNA PLANT COMMISSIONING Apex minerals website – ASX announcement, published: 9 December 2008, accessed: 11 December 2008
  23. ^ Apex Market Update APEX ASX announcement, published: 21 May 2010, accessed: 21 May 2010
  24. ^ Apex Minerals N.L. – Quarterly Report – 31st December 2008 APEX website, published: 30 January 2009, accessed: 2 February 2009
  25. ^ Apex Announces $28M Capital Raising APEX website, published: 18 May 2009, accessed: 18 May 2009
  26. ^ a b c Apex hits key targets in its first quarter as fully-fledged producer APEX website, published: 31 July 2009, accessed: 6 August 2009
  27. ^ a b Quarterly Report 31st December 2008 APEX website, published: 31 December 2008, accessed: 10 July 2009
  28. ^ Mining promoters do battle for gold The Sydney Morning Herald, published: 15 February 2008, accessed: 11 July 2009
  29. ^ Apex gives operating cost The West Australian, published: 10 July 2009, accessed: 11 July 2009
  30. ^ APEX Operations director resigns ASX announcement, published 2009-07-31, retrieved 2009-08-06
  31. ^ Trading Halt APEX website, published: 22 September 2009, accessed: 23 September 2009
  32. ^ Apex raising at fallen share price The Sydney Morning Herald, published: 23 September 2009, accessed: 23 September 2009
  33. ^ a b APEX annual report 2009 published: 23 October 2009, accessed: 21 January 2010
  34. ^ Wiluna Update APEX ASX announcement, published: 22 December 2009, accessed: 21 January 2010
  35. ^ a b c June 2010 Quarterly Report APEX ASX announcement, published: 30 July 2010, accessed: 30 July 2010
  36. ^ a b Apex halt ahead of $5m capital raising wabusinessnews.com.au, published: 4 August 2010, accessed: 4 August 2010
  37. ^ Apex in halt on $5m raising The West Australian, published: 4 August 2010, accessed: 4 August 2010
  38. ^ a b Quarterly Report December 2010 APEX ASX announcement, published: 21 January 2011, accessed: 27 January 2011
  39. ^ Apex Minerals set to raise more cash The West Australian, published: 27 January 2010, accessed: 27 January 2010
  40. ^ Kimberley nickel miner seeing gold ABC Rural, published: 28 February 2011, accessed: 18 March 2011
  41. ^ GUP Elimination and Capital Raising APEX ASX announcement, published: 2 February 2011, accessed: 3 May 2011
  42. ^ a b Quarterly Report March 2011 APEX ASX announcement, published: 2 May 2011, accessed: 3 May 2011
  43. ^ Apex production drops 4 000 oz in March quarter miningweekly.com, published: 2 May 2011, accessed: 3 May 2011
  44. ^ THE GEOLOGIST’S GUIDE TO THE BIOX PROCESS accessed: 13 December 2008[dead link]
  45. ^ Overview of the technology BIOX website, accessed: 13 December 2008
  46. ^ The Australian Mines Handbook – 2003–04 Edition page: 134
  47. ^ Fourth Quarter Activities Report - Part B GMC ASX announcement, published: 30 July 1998, accessed: 14 February 2010
  48. ^ Normandy Mining Ltd - 1999 Mine-by-Mine Operating Results accessed: 14 February 2010
  49. ^ Agincourt annual report 2005 ASX announcement, accessed: 12 January 2010
  50. ^ a b Agincourt annual report 2006 ASX announcement, accessed: 12 January 2010
  51. ^ Agincourt half yearly report July to December 2006 ASX announcement, accessed: 12 January 2010
  52. ^ Quarterly Report 31st March 2009 APEX website, published: 31 March 2009, accessed: 10 July 2009
  53. ^ Quarterly Report 30th September 2009 APEX website, published: 31 October 2009, accessed: 2 November 2009
  54. ^ December 2009 Quarterly Report APEX ASX announcement, published: 29 January 2010, accessed: 29 January 2010
  55. ^ March 2010 Quarterly Report APEX ASX announcement, published: 30 April 2010, accessed: 30 April 2010
  56. ^ Quarterly Report September 2010 APEX ASX announcement, published: 29 October 2010, accessed: 29 October 2010
  57. ^ a b Quarterly Report June 2011 APEX ASX announcement, published: 31 July 2011, accessed: 1 August 2011

[edit] External links
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