Abra base metals deposit


THE ABRA BASE METALS PROJECT IS A 100% OWNED, PROVEN HIGH-GRADE LEAD DEPOSIT LOCATED IN WESTERN AUSTRALIA.

 

Location and Ownership

The Abra base metals deposit (Pb-Ag-Cu-Au) is one of the largest, undeveloped lead deposits in the world. Galena Mining Limited holds a 100% interest in Abra.

Abra is located approximately 200km north of Meekatharra in the Ashburton Basin of central Western Australia. The tenements are accessible via the Great Northern Highway through public unsealed roads.

Location inc2. degrussa

Geology

Abra has been extensively studied and the geology is well understood. The Abra Deposit is hosted within the Jillawarra sub-basin of the Mesoproterozoic Edmund Basin, which is the lowest part of the Bangemall Supergroup and comprises a lower sequence of shallow water to lagoonal facies of stromatolitic dolomite, chert, sandstone and mudstone and an upper sequence of deeper water clastic sediments of black shales, mudstones and siltstones. The Edmund Basin developed between 1,620 Ma and 1,465 Ma during the Capricorn Orogeny. The Capricorn Orogen comprises overlapping sedimentary basins along the northern margin of the Yilgarn Craton and southern margin of the Pilbara Craton.

P3180337 

Exploration

Abra has undergone extensive exploration since discovery (early 1980’s) and a substantial resource has been identified. The Abra deposit is broadly split into an upper lead (Pb) and silver (Ag) rich zone (Upper Lead Zone) which overlies a polymetallic (copper-gold-lead-silver, Cu-Au-Pb-Ag) zone (Basal Copper Zone).

 

IMG 6572 

 

Drilling has identified a substantial, high-grade core of massive lead-silver mineralisation which can be described as a ‘core’ feature within the Upper Zone. This high-grade core is highlighted by an extensive list of very high-grade results within a large, coherent ore-body. Significant results include;

 

 

 Hole ID

From (m)

To (m)

Width (m)

Pb %

Ag (ppm)

Comments

 

High Grade Zone

AB12

660.00

666.00

6.00

20.33

45.8

including 4m@ 23.25 % Pb from 662m

 

AB16

497.00

541.00

44.00

25.32

42.9

including 4m @ 20.75% Pb from 499m, 8m @ 26.75% Pb from 505m, 4m @ 52.1% Pb from 515m, 10m @ 46.04%Pb from 523m and 2m@16.1% Pb from 537m

 

AB19

524.00

530.00

6.00

34.27

80.7

   

AB33

510.00

518.00

8.00

19.02

21.8

including 6m @ 23.13% Pb from 510m

 

AB48

511.70

515.70

4.00

19.02

28.2

   

AB58

406.00

420.00

14.00

16.12

37.7

including 2.5m @ 28.62% Pb from 409m and 2.7m @ 26.1% Pb from 413m

 

AB59

431.00

443.80

12.80

20.40

182.6

including  5.1m @ 30.85% Pb from 433m and 0.9m @ 41.5% Pb from 441.8m

 

AB60A

412.45

419.00

6.55

18.35

20.5

including 0.45m @ 21.54% Pb from 412.45m and 4.85m @ 22.4% Pb from 414.15m

 

Broad Low Grade Zone

AB43

510.00

535.00

25.00

9.74

16.1

including 2m @ 32.18% Pb from 530m and 0.6m @ 54.43% Pb from 534.4m

 

AB48

266.00

297.00

31.00

7.48

55.6

including 3m @ 21.81% Pb from 282.5m

 

AB50

378.00

403.50

25.50

11.20

21.1

including 2m @ 19.1% Pb from 380.4m, 2m @ 30.1% Pb from 384.3m, 1.7m @ 16.3% Pb from 387.3m, 2m@ 16.3% Pb from 391m and 1m@ 19.9% Pb from 402.5m

 

AB50

469.50

527.50

58.00

9.13

10.6

including 1m @ 23.9% Pb from 470.5m, 2.5m @ 18.88% Pb from 475m and 6m @ 24.13% Pb from 483m

 
 

AB56

386.80

410.00

23.20

11.08

59.4

including 5.3m @ 26.3% Pb from 404.7m

 

AB24

442.00

492.00

50.00

6.75

15.0

including 2m @ 15.04% Pb from 490m

 

AB28

404.00

458.00

54.00

7.31

11.3

including 2m @ 16.35% Pb from 416m and 2m @ 18.34% Pb from 434m

 

AB43

326.00

375.50

49.50

5.13

12.5

   

 

Copper/Gold Zones

Hole ID

From (m)

To (m)

Width (m)

Cu (%)

Au (ppm)

Comments

 

AB3

450

454

4.00

3.60

1.98

including  1m @ 6.62% Cu from 450m

 

AB22A

716

720

4.00

6.33

0.22

including  1m @ 10.49% Cu from 716m

 

AB47

396

400

4.00

3.44

0.02

including 1.6m @ 6.81% Cu from 398.4m

 

Hole ID

From (m)

To (m)

Width (m)

Au (ppm)

Cu (%)

Comments

 

AB3

513

514

8.00

5.84

1.05

including 1m @ 15.03ppm Au from 509m

 

AB16

713

723

10.00

3.45

0.23

   

AB50

641

655

14.00

3.43

0.77

   

Satellite discoveries around Abra (drilled as recently as 2011-13 programme) highlight the potential of the surrounding area. 

 cross secyion 

2007 Metallurgical test-work by delivered up to 96% Pb recovery, up to 90% Ag recovery using conventional flotation methods. Product would be a lead-rich sulphide concentrate. This type of material has been shipped out of Geraldton from the Golden Grove mine for over 25 years. 

 

cores3

This interval in the photo from AB32 shows lead (Pb) mineralisation averaging approximately 20%.