St Arnaud Project

St Arnaud Project

St Arnaud is 250km northwest of Victorian capital Melbourne, and 100km west of Bendigo.

Gold was first discovered at St Arnaud in 1855. The field was a continuous producer until 1916, when the mines closed down during World War I. From 1855 to 1916, more than 360,000oz of gold were produced from the area at a recovered grade of more than 15g/t Au.

Bora Bora’s St Arnaud Project consists of Exploration Licence EL4363 and Exploration Licence EL 5384, surrounding the St Arnaud townsite (Figure 1).

Positive features of the St Arnaud project include:

• The high-grade gold mineralisation is predominantly fine grained, making it possible to define with RC and/or diamond drilling and will lend itself to a potential high margin operation
• The structures that host the gold are steeply west dipping and relatively consistent, for low cost automated mining options
• Many targets exist in close proximity to each other and may be mined from the same infrastructure
• The line of lodes potentially extend under transported cover to the north west

 

Bora Bora’s exploration program will be designed to test targets associated parallel to and along strike of the St Arnaud Gold Field. The program will initially entail a review of open file literature, location and validation of all existing drill hole data, collation and assessment of previous geophysical surveys.

 

Emphasis will be placed on identifying areas along strike and parallel to the St Arnaud historic lines of lodes that exhibit:

• Similar geophysical magnetic, gravity and resistive features to the St Arnaud line of lode where transported cover masks surface outcrop

• Evidence of structural dislocation such as faulting and linear fracture lines contiguous with St Arnaud historic gold deposits

 

Once targets are defined, ranked and prioritised, the following process will be applied:

• Ground reconnaissance, mapping and rock chip sampling to be completed where applicable

• Soil sampling in areas of subcrop

• Scout bedrock aircore drilling to confirm alteration assemblages and tenor of metal values.

 

Follow-up aircore in areas of interest

• Detailed geophysics including ground gravity, IP and resistivity surveys

• Reverse circulation and diamond drilling as required

 

Mines

Years

Tonnes

Grade

(g/t Au)

 

Ounces

Lord Nelson

1864-1916

567,240

15.6

283,960

Wilson’s Reef

1864-1886

42,010

16.4

22,150

New Bendigo

1864-1902

36,990

18.6

22,120

Rising Star Reef

1868-1882

12,870

17.1

7,070

Brownings Luck

1897-1904

11,280

15.6

5,660

Lady Nelson

1905-1909

12,230

10.1

3,990

Ballarat Reef

1865-1875

4,980

21.7

3,470

Bell Rock

1866-1877

4,250

21.4

2,930

Stuarts Hill

1865-1869

2,900

28.7

2,670

New Bendigo Gold Mines

1912 -1916

11,210

6.9

2,480

Blinky Bonny

1868-1887

1,040

66.2

2,220

Total Historic Mining

707,000

15.8

358,720

 

More Recent Mining

Glenburn Manor

1993-1995

152,630

1.1

5,590

Table 1: Production from the St Arnaud Goldfield up to 1997 

 

St Arnaud Project

Figure 1: St Arnaud Project tenements