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Press Releases
 Thu Jul 22, 2010
Sunridge Gold Announces Results Of Strategic Production Study And Metallurgic Testing For Asmara Project, Eritrea

 Sunridge Gold Corp. (SGC/TSX.V) ("Sunridge") is pleased to announce that it has received the final report for the "Strategic Production Study (the "Study") for the Asmara Project, Eritrea from PEG Mining Consultants Inc. ("PEG"). This Study examined the metallurgical characteristics of the four resources owned 100% by Sunridge and completed a high-level evaluation of the economics and the possibilities of combining the development of the deposits. The results of the Study are intended to serve as a roadmap for Sunridge for future engineering studies and project development. As a result of the positive conclusions of the Study, the Company intends to commence prefeasibility studies for Emba Derho, Adi Nefas and Debarwa in the near future.

Three of the mineral deposits held by Sunridge together contain Indicated resources of 1.28 billion pounds (580,000 tonnes) of copper, 2.5 billion pounds (1,130,000 tonnes) of zinc, 1.05 million ounces of gold and 31.8 million ounces of silver. In addition the Gupo Gold deposit contains 189,000 ounces of gold in the Inferred category (see resource details towards the end of this release).

The Study

The initial focus of the Study was to examine the possibility of fast-tracking a high-grade portion of the copper supergene zone at the Debarwa deposit, in the southern part of the project area, into production by selective mining and direct shipping the material to a smelter. In addition, the Study examined the concept of the combined development of the Debarwa Deposit (less the direct shipping material) and the three properties to the north, Emba Derho, Adi Nefas and Gupo, all located within approximately 7 km of each other (see map at the end of this release).

A summary of key conclusions of the Study are as follows:

Debarwa Direct Shipping of High-grade Copper Supergene Material:
  • PEG has concluded that it is possible to selectively mine a high-grade (+15% copper) portion of the Debarwa copper supergene zone for direct shipping to a smelter (Direct Shipping Option -- "DSO") thereby eliminating the need for a process plant facility early in the mine life.

  • After the DSO start-up period a flotation plant and further mine development would be required to exploit the remaining transition, supergene and primary zones at Debarwa. This longer term (9-year) production scenario further improves the economics of the deposit. After the DSO start-up period a flotation plant and further mine development Trade-off studies by PEG mining engineers have concluded that underground mining using a ramp, as opposed to using the existing vertical shaft, is the preferred method of access to the mineralized material at Debarwa.
Combined Development of Emba Derho, Adi Nefas, Debarwa and Gupo Gold:
  • Recent mineralogy and metallurgical test work indicates that copper and zinc mineralization from the Emba Derho, Debarwa and Adi Nefas deposits all respond to extraction by froth flotation in a similar manner and therefore co-processing these materials in a single flotation process plant is deemed feasible. To confirm this, further tests on blended material are recommended.

  • Oxide gold mineralization from all four of the deposits responds well to gold recovery by cyanidation therefore this material could be co-processed in a single central cyanide leach plant.

  • PEG concluded that the development of a central process facility for both base metals and gold at Emba Derho will provide significant economic benefits for the other three deposits through capital cost synergies for items such as process plant equipment, infrastructure and tailings disposal facilities.

  • In PEG's opinion the inclusion of a Dense Media Separation (DMS) ahead of the Emba Derho process plant represents a significant opportunity to improve project economics by rejecting barren dyke material prior to grinding. More detailed examination of this option is recommended for the prefeasibility study.
Metallurgical Work

As part of the Study, Blue Coast Metallurgy Ltd. ("BCM") worked with PEG to determine the metallurgical compatibility of mineralization from each deposit and options for combining ore processing with development of flow-sheets. Highlights of the work are as follows:
  • Both mineralogy studies and initial flotation testing point to Emba Derho and Adi Nefas being fully compatible mineralogically . They both have typical polymetallic mineralization and are showing good response to early tests employing conventional flotation treatment schemes.

  • Batch tests on the composite samples as received have indicated:
    • Emba Derho sample:
      • Copper-rich zone; 91% copper recovery to a nominally saleable copper concentrate (subject to acceptable minor element analysis). Grades of the concentrate up to 28% copper have been made and accompanying zinc grades are below what would attract significant penalties from most copper smelters.
      • Zinc-rich zone; up to 96% zinc recovery to combined copper and zinc concentrates, with indications that with further optimisation tests the vast majority of this material can be directed into a saleable zinc concentrate.
    • Adi Nefas primary sample:
      • A composite containing 3% copper and 21% zinc has been subject to two rougher flotation tests.
      • Both the copper and zinc floated extremely well, with recoveries of 97-99% to the combined copper and zinc concentrates.
      • Early evidence points to selective flotation being achievable, using a primary grind and a flowsheet that is essentially the same as Emba Derho, however no definitive recovery numbers are available yet.
    • Debarwa primary:
      • Mineralogical benchmarking suggests that the Debarwa primary mineralization is amenable to the same flowsheet as Emba Derho and Adi Nefas although this will need to be confirmed with further testwork.
Resource Summaries

Debarwa

Indicated resource estimates from report titled "Debarwa Project, Eritrea -- Mineral Resource Estimate" prepared by MSA Geoservices (Pty) Ltd. ("MSA") dated January 21, 2008 (which may be viewed under Sunridge's profile on SEDAR at www.sedar.com) are summarized as follows:

Debarwa - Indicated Resources 

Zone

Cut Off

K-tonnes

Au g/t

Ag g/t

Cu%

Zn%

Oxide+Transition

0.5 g/t Au

2,442

1.71

13.79

0.12

0.09

Supergene

1% Cu

1,336

1.54

33.87

5.36

0.08

Primary

1% Cu

699

0.87

22.31

2.53

3.23

Totals

 

4,478

 

 

 

 



Emba Derho

Indicated resource estimates for Emba Derho from report titled "Emba Derho Project, Eritrea -- Mineral Resource Estimate" prepared by Wardrop dated October 31, 2008 (which may be viewed under Sunridge's profile on SEDAR at www.sedar.com) are summarized as follows:

 Zone  

 Cut-off
 grade  

 Million
Tonnes  

 Copper  
%

 Zinc  
 %

 Gold
g/t  

 Silver
g/t  

 Gold Oxide  

 0.2 g/t Au  

 3.51  

 0.06  

 0.04  

 0.84  

 5.14  

 Copper-rich
 Primary    

 0.5% Cu  

 38.425  

 1.02  

 0.99  

 0.18  

 9.31  

 Zinc-rich
 Primary 

 1.0% Zn  

 20.545  

 0.28  

 2.35  

 0.39  

 12.13  



Adi Nefas

Indicated resource estimates for Adi Nefas from report titled "Adi Nefas Project, Eritrea - Mineral Resource Estimate" prepared by MSA Geoservices (Pty) Ltd. ("MSA") dated January 21, 2008 (which may be viewed under Sunridge's profile on SEDAR at www.sedar.com) are summarized as follows:


Adi Nefas - Indicated Resources

Zone

Cut Off

K-tonnes

Au g/t

Ag g/t

Cu%

Zn%

Primary

2% Zn

2,727

2.85

99.30

1.39

8.38



The Adi Nefas high grade zinc-copper-gold deposit is located approximately 6 km east of Emba Derho.

Gupo Gold

Inferred resource estimates for Gupo from report titled "Independent Consulting Geologists Technical Report - Asmara Project" prepared by Blackburn, G. and Chisholm, R., dated April 2004 (which may be viewed under Sunridge's profile on SEDAR at www.sedar.com) are summarized as follows:


Gupo Gold - Inferred Resources

Tonnes

Average Gold Grade g/t

Ounces of Gold

1,965,000

2.99

189,000



Total Contained Metals

The total contained metal in NI43-101 "Indicated" category is as follows.

Asmara Project - Total Contained Metal in Indicated Resources

Deposit

M lbs Cu

M lbs Zn

K oz Au

M oz Ag

Emba Derho

993

1902

580

20.1

Debarwa

203.6

57.0

219.8

3.0

Adi Nefas

83.7

503.6

250.0

8.7

Totals

1,280.3

2,462.6

1,049.8

31.8



Note: Contained metal estimates are rounded and remain subject to factors such as mining dilution and process recovery losses.

Qualified Person

Michael J. Hopley, President and Chief Executive Officer of Sunridge is the Qualified Person for Sunridge and the person responsible for preparation of the technical information contained in this news release. The data disclosed in the "Metallurgical Work" section is preliminary in nature, is part of ongoing metallurgical test work and has not therefore been verified by the Qualified Person.

ABOUT SUNRIDGE:

Sunridge is a mineral exploration and development company focused on the acquisition, exploration, discovery and development of base and precious metal projects on the Asmara Project in Eritrea and exploration properties in Madagascar.

Sunridge has approximately 76 million shares outstanding and approximately $4.7 million in cash. Sunridge trades on the TSX Venture Exchange under the symbol SGC. For additional information on the Company and its projects please view the slide show on our website at www.sunridgegold.com or call Don Halliday or Greg Davis at the numbers listed below.


SUNRIDGE GOLD CORP.

"Michael Hopley"
Michael Hopley, President and Chief Executive Officer


For further information contact:
Don Halliday, Executive Vice President
Email: donh@sunridgegold.com
Tel: 604-899-1505 (direct)

Greg Davis, VP Business Development
Email: greg@sunridgegold.com
Tel: 604-688-1263 (direct)

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

This press release contains forward-looking statements about the Company and its business. Forward looking statements are statements that are not historical facts and include resource estimates. The forward-looking statements in this press release are subject to various risks, uncertainties and other factors that could cause the Company's actual results or achievements to differ materially from those expressed in or implied by forward looking statements. These risks, uncertainties and other factors include, without limitation risks related to fluctuations in gold prices; uncertainties related to raising sufficient financing to fund the planned work in a timely manner and on acceptable terms; changes in planned work resulting from weather, logistical, technical or other factors; the possibility that results of work will not fulfill expectations and realize the perceived potential of the Company's properties; uncertainties involved in the interpretation of drilling results and other tests and the estimation of gold resources; the possibility that required permits may not be obtained on a timely manner or at all; the possibility that capital and operating costs may be higher than currently estimated and may preclude commercial development or render operations uneconomic; the possibility that the estimated recovery rates may not be achieved; risk of accidents, equipment breakdowns and labor disputes or other unanticipated difficulties or interruptions; the possibility of cost overruns or unanticipated expenses in the work program; and other factors identified in the Company's filings with Canadian securities regulatory authorities. Forward-looking statements are based on the beliefs, opinions and expectations of the Company's management at the time they are made, and other than as required by applicable securities laws, the Company does not assume any obligation to update its forward-looking statements if those beliefs, opinions or expectations, or other circumstances, should change.