Share on TwitterTweet
B2GOLD GAOUA DEPOSIT (304,4Mt@0.32%Cu & 0.35g/t Au) | Burkina-emine
Partners
TTG GF CONSULT
Annual Archive

B2GOLD GAOUA DEPOSIT (304,4Mt@0.32%Cu & 0.35g/t Au)

25 September 2013

GAOUA COPPER-GOLD DEPOSIT

Project Location and Access

Gaoua project is located in the South West of Burkina Faso at 20km east of Gaoua city. Access is by 270km paved road to Gaoua and further 20km of gravel road to project area.

The project includes the contiguous Malba, Souhouera and Danyoro permits 100% owned by Volta Resources.

The Gaoua project covers 691.5 km² and the region has established infrastructure.

Project History

–¬†¬†¬†¬†¬†¬†¬†¬† 1970: sulphides occurences of Dienemera and Gongondy was studied by GAMSONRE P. E. for petrology and metallogeny as part of his post-graduate Thesis, and later were explored by the Gaoua Mining Project in 1983 .

–¬†¬†¬†¬†¬†¬†¬†¬† The Gaoua project includes the Malba property that was acquired by Goldcrest in June 2004 and has been explored for gold and copper gold deposits.

–¬†¬†¬†¬†¬†¬†¬†¬† Volta Resources Inc is the result of the merger of Birim Goldfields Inc and Goldcrest Resources Ltd.

–¬†¬†¬†¬†¬†¬†¬†¬† The Souhouera property located immediately south of the Malba concession was acquired by the Company on September 2005. October, 2006, exploration in the southernmost part of the Souhouera concession has indicated that the gold mineralization extends within the Danyoro concession.

–¬†¬†¬†¬†¬†¬†¬†¬† Goldcrest finally purchased a 100% interest in the Danyoro concession, through its wholly-owned subsidiary Wentworth Resources Pty Ltd.

–¬†¬†¬†¬†¬†¬†¬†¬† In April 2007, a major core drilling program tested several targets for copper-gold porphyry-style mineralization in two main areas: Gongondy and Dienemera-Mont Biri. The results by early September 2007 confirmed a wide copper-gold mineralization with porphyry copper characteristics.

–¬†¬†¬†¬†¬†¬†¬†¬† NI 43-101 compliant Inferred Resource estimate, calculated by SRK Consulting (UK) at Dienemera and Gongondy was released in February 2009.

–¬†¬†¬†¬†¬†¬†¬†¬† 2013-01-23,Volta Resources has released the results of the updated mineral resource estimate for the Gaoua project ¬†with 2,008 million pounds of copper and 3,169,600 ounces of gold.

Р       Thursday, November 14, 2013 B2Gold Corp. acquired Volta Resources Inc.

 Project Geology

The project is located at the southern end of the the prolific Boromo greenstone belt, one of the early Proterozoic Birimian sequence of the West Africa that is host to several world class gold deposits.

Gaoua project is located at the south of the belt and has historically been a major artisanal gold producing area of Burkina Faso.

The major geological units strike north-south. They include basaltic and andesitic rocks with volcaniclastic units, sedimentary cherts and quartzite. These units are intruded by diorite and Dioritic breccia units.

There is a central structural corridor that hosts the most known copper-gold and gold occurrences. Among those identified to date are the main prospects of Gongondy, Dienemera and Mt. Biri. These prospects contain mineralization hosted in various phases of the dioritic intrusive units.

The mineralization at all the three prospects is associated with an hydrothermal breccia that is largely hosted by diorite porphyry intrusions.

DEPOSIT TYPES

Exploration work confirms the presence of wide copper-gold mineralization hosted by hydrothermal breccia, which show porphyry copper characteristics.

An expert review of the historical exploration data and observation off the drill core, confirm classic porphyry-style copper and gold mineralization.

MINERALIZATION

The main copper-gold porphyry occurrences identified to date are the Gongondy, Dienemera, Mt Biri and Boussera prospects.

The mineralization in these three main prospects is associated with a hydrothermal breccia that is hosted in various phases of the dioritic porphyry units. It however locally extends into the adjacent volcanic tuffs and lavas.

The mineralized breccia is characterized by small clasts and by the presence of centimetric clots of cementing minerals that approximate a triangular form. The hydrothermal cement is composed of quartz, K-feldspar, epidote, chalcopyrite, pyrite, calcite and anhydrite.

Most of the breccia-hosted mineralization consists of hypogene chalcopyrite carrying the gold.

Copper-gold mineralization at Gongondy has been found over more than 2km of strike length, while drilling at Dienemera has identified copper-gold mineralization extending north-south for over 900m by nearly 850m wide.

Mineral Resource

Volta Resources has released the results of the updated mineral resource estimate for the Gaoua copper-gold porphyry project (Dienemera and Gongondy deposits) by SRK Consulting (U.K.). The updated mineral resource estimate dated of 2013-01-23, include 282.41 million tonnes at 0.53 % copper equivalent for 2,008 million pounds of copper and 3,169,600 ounces of gold (at a 0.3 % copper-equivalent cut-off). These Mineral Resources are NI43-101 compliant and have been prepared under CIM guidelines for reporting of Mineral Reserves and Mineral Resources.

(source: company web site / press releases of 2013-01-23).

Category

DEPOSIT 

Tonnage

Copper

Gold

Copper Equivalent

(tonnes)

%

lbs

g/t

Oz

%

lbs

INDICATED

GONGONDY

22,020,000

0.29

138,577,000

0.33

236,300

0.49

235,807,000

 

DIENEMERA

Subtotal

 

22,020,000

0.29

138,577,000

0.33

236,300

0.49

235,807,000

INFERRED

GONGONDY

185,260,000

0.28

1,129,216,000

0.44

2,631,600

0.54

2,211,874,000

 

 

 

 

 

 

 

 

DIENEMERA

97,150,000

0.41

878,764,000

0.17

538,100

0.51

1,100,138,000

Subtotal

 

282,410,000

0.32

2,007,980,000

0.35

3,169,600

0.53

3,312,012,000

GRAND TOTAL

GAOUA

304,430,000

0.32

2,146,557,000

0.35

3,405,900

0.53

3,547,819,000

 NB: Some figures are modified from company web site / press releases.

http://www.b2gold.com

25 September 2013

Leave a Reply

Member Login
Newsletter
Flash Info

To read on burkina-emine: INDUSTRIAL GOLD PRODUCTION IN BURKINA 2016 HIGHLIGHTS AND 2017 CHALLENGES .

IAMGOLD best gold producer…
NORDGOLD best operating company in terms of exploration / endogenous growth…
SEMAFO best producer in terms of cash flow…

Statistics
  • 867
  • 2,044
  • 97,023
  • 7,152,263
COMPANY