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PREDICTIVE BONGOU DEPOSIT

4 September 2014

BONGOU DEPOSIT 

PREDICTIVE BONGOU DEPOSIT_EN_page7_image1

Project Location and Access

Bongou locationThe Bongou Deposit is located within a Birimian greenstone gold belts in Eastern Burkina Faso, 215 km to the East of Ouagadougou the capital city. It is a prospect that is part of the bigger Bonseiga project 100% owned by Predictive Discovery.

The Bonsiega Permit Group covers nine exploration permits totalling 1,045 km2 in the same greenstone belt which hosts the Samira Hill Mine in Niger. The Bongou prospect is located within the Madyabari exploration permit.

Access to project area is possible by 215 km of paved road to Fada N’Gourma. A 80km laterite road lead to Gayeri the closer town. From Gayeri there are further 25 km of laterite road to reach the project area.

Project history

–¬†¬†¬†¬†¬†¬†¬†¬† Predictive Discovery Limited (PDI) was established in late 2007 and listed on the ASX in December 2010.

–¬†¬†¬†¬†¬†¬†¬†¬† Bongou Prospect covers artisanal workings with an irregular open pit.

–¬†¬†¬†¬†¬†¬†¬†¬† Early exploration by Predictive included rock chip sampling, trenching and discovered a series of auger geochemical gold anomalies. Some were tested RC drilling programs. A series of prospects containing ore grade and wide gold intercepts were identified. These included Bongou, Dave, Fouli, Laterite Hill, Tamboana and Prospect 71.

–¬†¬†¬†¬†¬†¬†¬†¬† One of the Bongou RC drill hole in 2011-12 intersected 54m at 2.1g/t Au including 20m at 4.8g/t Au. Bongou discovery was made in mid-2012.

–¬†¬†¬†¬†¬†¬†¬†¬† An exploration RC program following up this result commenced on the Bongou Prospect in November 2012.

–¬†¬†¬†¬†¬†¬†¬†¬† In 2012-13, PDI focused most of its attention on the higher grade prospects, especially Bongou.

–¬†¬†¬†¬†¬†¬†¬†¬† Jan 22nd 2013 Predictive Discovery announce new positive results at Bongou with broad intercepts of gold ¬†¬†¬†including 10 metres at 7.4 g/t.

–¬†¬†¬†¬†¬†¬†¬†¬† Primary positive metallurgical results were reported in May 2013.

–¬†¬†¬†¬†¬†¬†¬†¬† PDI completed power auger drill holes, totalling 4,005m, within a 2km radius of Bongou in April, 2014 which generated 19 new gold anomalies.

–¬†¬†¬†¬†¬†¬†¬†¬† July 2014, Aurora Minerals acquire a 17.2% stake in Predictive Discovery.

–¬†¬†¬†¬†¬†¬†¬†¬† ¬†The Company completed Mineral Resource Estimate on the deposit with the assistance of Golder Associates, and on 4th September 2014, announced Maiden Mineral Resource Estimate of 2.2 Mt at 2.6 g/t Au for 184,000oz.

 

Project Geology

BONGOU DEPOSIT_geologyThe Bonsiega Project covers 100km of Birimian age greenstone belt in Eastern Burkina Faso, along strike from the Samira Hill Gold Mine in Niger. The greenstone belt is oriented ENE-WSW and is dominated by volcano sedimentary rocks with intercalated mafic volcanic rocks. The edges of the belt are bounded by Gabbro and mafic volcanic complex which is in contact with the craton granite.

The Bongou Prospect local geology is characterized by a silicified microgranite in contact with foliated gabbro and mafic volcanics. The microgranite body is intensely altered and quartz veined. It is lying between a sheared gabbro on the northern margin of the mineralization and a basalt body (partly sheared) on the southern margin. The gabbro and basalt contacts are approximately parallel to one another. Geology in the area demonstrates that the thin shear-bounded panels of granite within the gabbroic hanging wall rocks can be traced over tens of metres along strike.

Pyrite is disseminated throughout the mineralization with higher gold grades apparently associated with coarse-grained pyrite. The quartz veins contain some carbonate.

The bulk of the gold mineralization is controlled by a major fault / shear zone which extends for at least several hundred kilometres along strike.

 BONGOU DEPOSIT_rheology

DEPOSIT TYPES

Bongou deposit typeThe mineralization is interpreted as a variant of the orogenic gold mineralization style, which is known throughout the Birimian Belt of West Africa. It is a thick, near surface gold mineralization, favourable for development as an open pit mining operation. Gold mineralization there is contained within an intensely altered granite intrusion.

Gold grades are associated with pyrite-bearing altered granite, which is very visibly distinct from the adjacent low grade gabbro.

 

MINERALIZATION

Bongou mineralisationThe Bongou Gold mineralization is contained within an intensely altered (silica-albite), quartz veined and pyritic microgranite intrusion. Nearly all of the gold mineralization consists of altered microgranite, with higher grades located close its northern contact with gabbro.

The mineralized body lies within a large structure. Gold grades are associated with pyrite-bearing altered granite, while the adjacent gabbro is low grade.

Pyrite is disseminated throughout the mineralization and the higher gold grades are associated with coarse-grained pyrite. The quartz veins contain some carbonate and the mineralization contains minor magnetite and sericite in fractures. Metalurgical test work indicated rapid gold dissolution in first few hours. Ore contains Free gold and also gold on or within pyrite.

The Bongou mineralized body is a thick and steeply plunging. Average true widths intersected from drilling in the high grade body were 31.6m with average grades of 2.9 g/t Au (significant high-grade component).

 Mineral Resources

Predictive Discovery announced in September 2014 a Maiden Mineral Resource Estimate for Bongou deposit (>50% Indicated category): 2.2Mt at 2.6g/t Au (184,000oz) including 1.1Mt at 3.8g/t Au (136,000oz).

This Resource estimate was prepared by Golder Associates Pty ltd and classified in accordance with The JORC Code, 2012 Edition. Grade estimates were classified based principally on geological confidence criteria, the distribution and quality of drilling and sampling information and the performance of the grade interpolation.

  • ¬†There is very little difference in contained ounces between the 0.4g/t Au cut-off and the 0.8g/t Au cut-off grades, and
  • ¬†Over 70% of the resource ounces are retained when the cut-off grade is raised from 0.8g/t Au to 2.0g/t Au, with an average grade of 3.75g/t Au

The in situ Bongou Mineral Resource is shown in Table below and are reported at a range of Au cut-off grades.

Source: ASX Announcement of 4th September 2014

Cut-off

Indicated Resources

Inferred Resources

Total Resources

(Au g/t)

Tonnage (Mt)

Au g/t

Ounces

Tonnage (Mt)

Au g/t

Ounces

Tonnage (Mt)

Au g/t

Ounces

0.4

1.21

2.54

99 000

1.33

2.13

91 000

2.55

2.32

190 000

0.8

1.14

2.67

98 000

1.09

2.48

86 000

2.22

2.58

184 000

2

0.64

3.64

75 000

0.49

3.9

61 000

1.13

3.75

136 000

3

0.34

4.68

52 000

0.28

4.95

45 000

0.62

4.8

96 000

www.predictivediscovery.com

NB: Some of the figures are modified from company public data

4 September 2014

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