Columbus Gold Corporation

Published : January 08th, 2015

95% Gold Recoveries From Metallurgical Tests at Columbus Gold's Montagne d'Or Gold Deposit, French Guiana

( 0 vote, 0/5 ) Print article
  Article Comments Comment this article Rating Follow Company  
0
Send
0
comment

95% Gold Recoveries From Metallurgical Tests at Columbus Gold's Montagne d'Or Gold Deposit, French Guiana

VANCOUVER, BC--(Marketwired - January 08, 2015) - Columbus Gold Corporation (TSX VENTURE: CGT) (CBGDF) ("Columbus Gold") is pleased to announce the results of comprehensive metallurgical test work from Columbus Gold's 100 % controlled Montagne d'Or Gold Deposit, Paul Isnard Project, in French Guiana.

Three gold recovery process options were investigated on master composites: 1) whole-ore cyanidation, 2) a combination of gravity concentration followed by cyanidation of gravity tailing, and 3) gravity concentration followed by gold flotation from the gravity tailing. The test work indicates that the ore types of the principal Upper Felsic Zone ("UFZ") and subsidiary Lower Favorable Zone ("LFZ") are highly amenable to the three metallurgical processes tested, with recoveries of gold ranging from 95% to 97% as follows:

     
  UFZ Master Composite LFZ Master Composite
 Recovery* Tailings Recovery* Tailings
Process
Au (%) Au (g/t) Au (%) Au (g/t)
Whole Ore Cyanidation 94.7 0.08 97.0 0.06
Gravity + Cyanidation 96.7 0.06 97.2 0.05
Gravity + Rougher Flotation 96.8 0.09 96.6 0.08
* at a grind size of 80% passing (P80) 75µm
 

The metallurgical tests were performed on two master composites prepared from 3.3 tonnes of whole core intervals from the UFZ and the LFZ. Triplicate fire assays for gold and silver showed that the UFZ master composite averaged 1.50 g/t Au and 3.33 g/t Ag and the LFZ composite averaged 1.56 g/t Au and 4.67 g/t Ag. 

The response of test samples to different process methods are summarized as follows:

  • Baseline leaching of ground whole ore for 72-hours in 0.5g/L sodium cyanide extracted 94.7% of the gold from the UFZ master composite and 97.0% of the gold from the LFZ master composite ore at a grind size of 80% passing (P80) 75µm.
  • Gravity separation was able to recover up to 47.9% of the gold from the UFZ master composite and 40.2% of the gold from the LFZ master composite into gravity cleaner concentrates representing about 0.1 wt.% of the test material.
  • Overall gold recoveries from the test flowsheet, which included gravity concentration followed by cyanidation of the gravity tailing, were slightly better than the recoveries achieved from whole-ore cyanidation at the same P80 75µm grind size.
  • Gravity concentration followed by rougher flotation of the gravity tailings at a grind size of P80 75µm achieved 96.8% gold recovery from the UFZ master composite and 96.6% gold recovery from the LFZ master composite. This included 20.6-47.9% of the gold reporting to gravity concentrate and 48.8-72.8% of the gold reporting to the flotation rougher concentrate. Combined silver recovery into combined gravity and flotation concentrates ranged from 80-89%.
  • Metallic screen assays indicate the presence of coarse gold in the Montagne d'Or test composites. The 30-50% gravity recoverable gold obtained from the gravity process also confirms this finding.

Pending metallurgical test results include additional flotation studies to evaluate the extent to which the flotation concentrates can be upgraded. In addition, confirmatory test work is being performed on ten variability composites under optimized test conditions to evaluate impact of spatial and grade variations throughout the deposit. The results from these additional tests are anticipated to be completed by the end of February 2015.

The metallurgical tests are being conducted by Bureau Veritas Commodities Canada Ltd., Inspectorate Metallurgical Division, under the direction and supervision of Eric Olin of SRK Consulting (U.S.) Inc. The metallurgical tests are an integral part of a Preliminary Economic Assessment ("PEA") on the Montagne d'Or deposit to be completed in the spring of 2015, which will include an updated resource estimate incorporating the results of the Phase II Diamond drilling program (126 holes, 25,570 m) and a preliminary environmental assessment.

The test work is being funded by Nord Gold N.V. (LSE:NORD LI) as part of a minimum US$30 million exploration and development program pursuant to which they can earn a 50.01% interest in Montagne d'Or and the Paul Isnard mineral claims, by completing a bankable feasibility study no later than March 2017.

Eric Olin, of SRK Consulting (U.S.), Inc., MSc, MBA, RM-SME and a Qualified Person under National Instrument 43-101 has reviewed the metallurgical information contained in this release.

ON BEHALF OF THE BOARD,

Robert F. Giustra
Chairman & CEO

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 release contains forward-looking information and statements, as defined by law including without limitation Canadian securities laws and the "safe harbor" provisions of the US Private Securities Litigation Reform Act of 1995 ("forward-looking statements"), respecting Columbus Gold's: indications that ore types of the UFZ and LFZ are highly amenable to the three metallurgical processes tested; metallurgical tests; completion of new mineral resource estimate; completion of the PEA; projected funding of drilling programs by Nord Gold N.V. pursuant to the terms of the option agreement and the related completion of a bankable feasibility study ("BFS"); and general exploration plans. Forward-looking statements involve risks, uncertainties and other factors that may cause actual results to be materially different from those expressed or implied by the forward-looking statements, including: the ability to acquire necessary permits and other authorizations; environmental compliance; cost increases; availability of qualified workers and drill equipment; competition for mining properties; risks associated with exploration projects including, without limitation, the accuracy of interpretations; mineral reserve and resource estimates (including the risk of assumption and methodology errors and ability to complete a new resource estimate by the proposed target date or at all)); whether the ore types of the UFZ and LFZ are highly amenable to the three metallurgical processes tested; the ability to meet proposed schedules for the shipment of samples and completion of metallurgical tests; the ability to complete the next phases of metallurgical tests by the proposed target date or at all; the ability to complete the PEA by the stated deadline or at all; dependence on third parties for services; non-performance by contractual counterparties; title risks; risks associated with Nord Gold N.V. electing not to exercise its option and make the related option payments and the ability to complete the BFS by the stated deadline or at all; and general business and economic conditions. Forward-looking statements are based on a number of assumptions that may prove to be incorrect, including without limitation assumptions about: whether the planned metallurgical tests are appropriate for the site; general business and economic conditions; the timing and receipt of required approvals; availability of financing; power prices; ability to procure equipment and supplies including, without limitation, drill rigs; and ongoing relations with employees, partners, optionees and joint venturers. The foregoing list is not exhaustive and Columbus Gold undertakes no obligation to update any of the foregoing except as required by law.

Read the rest of the article at finance.yahoo.com
Data and Statistics for these countries : Canada | All
Gold and Silver Prices for these countries : Canada | All

Columbus Gold Corporation

DEVELOPMENT STAGE
CODE : CGT.V
ISIN : CA1991711096
Follow and Invest
Add to watch list Add to your portfolio Add or edit a note
Add Alert Add to Watchlists Add to Portfolio Add Note
ProfileMarket
Indicators
VALUE :
Projects & res.
Press
releases
Annual
report
RISK :
Asset profile
Contact Cpy

Columbus Gold is a gold development stage company based in Canada.

Columbus Gold develops gold and silver in USA, and holds various exploration projects in USA.

Its main asset in development is SILVER DOME in USA and its main exploration properties are DUTCH FLAT, WINNEMUCCA MOUNTAIN, SUMMIT PROJECT, UTAH CLIPPER, CRESTVIEW, LAURA PROPERTY, WHITE HORSE NORTH, AWAKENING, CHERT CLIFF, OVERLAND PASS, SCRAPER, RED HILLS PROPERTY, PETE'S SUMMIT, GUILD PROJECT, CLARA MORO, FOUR METALS PROPERTY, WHITE CANYON MINE, HUGHES CANYON, GOLDEN MILE, WEEPAH, WHITE HORSE FLATS, DEL ORO, BOLO, EASTSIDE (NEVADA), MILL CANYON (NEVADA) and SPRING in USA and PAUL ISNARD in French Guyana.

Columbus Gold is listed in Canada and in United States of America. Its market capitalisation is CA$ 49.3 millions as of today (US$ 34.5 millions, € 31.9 millions).

Its stock quote reached its highest recent level on December 31, 2007 at CA$ 1.89, and its lowest recent point on November 14, 2008 at CA$ 0.10.

Columbus Gold has 142 920 000 shares outstanding.

Your feedback is appreciated, please leave a comment or rate this article.
Rate : Average note :0 (0 vote) View Top rated
 
In the News and Medias of Columbus Gold Corporation
3/3/2012French Guiana gold deposit reveals stronger legs for Columbu...
Annual reports of Columbus Gold Corporation
Annual Report 2007
Financings of Columbus Gold Corporation
2/2/2009Closes First Tranche of Private Placement
12/18/2008Announces Private Placement
12/12/2008Files Application to Reprice Warrants
Nominations of Columbus Gold Corporation
1/10/2013Appoints Mr. Rock Lefrancois as Chief Operating Officer
3/29/2011Makes Senior Management Appointments; Wallace President, Ken...
1/25/2011Appointment of Akbar Hassanally as Chief Financial Officer
7/7/2008APPOINTS NEW DIRECTOR
Project news of Columbus Gold Corporation
7/27/2016Granted Permits Covering Potential Extensions of
1/18/2012Invite - Columbus Gold - Vancouver Resource Investment Confe...
6/30/2011(Paul Isnard)Closes Transaction to Acquire 1.9 Million Inferred Oz. Paul ...
6/1/2011(Hughes Canyon)Acquires Hughes Canyon Gold Project in the Stillwater Range,...
5/26/2011(Paul Isnard)Acquisition of 1.9 Million Oz. Paul Isnard Gold Project Appr...
5/17/2011(Eastside (nevada))New Gold Discovery: Columbus Gold Intersects 2.42 g/t Gold O...
5/9/2011(Stevens Bassin)Drilling Commences at Stevens Basin Gold Project, Nevada
4/28/2011(Paul Isnard)Plans Drilling at Paul Isnard 1.9 Million Oz. Gold Project
4/7/2011(Weepah)Encounters Additional Gold Intercepts in Drilling at Weepah ...
3/9/2011(Eastside (nevada))Columbus Gold Commences Drilling at Eastside Gold Project, N...
2/14/2011(Paul Isnard)Completes Due-Diligence Regarding the Acquisition of 1.9 M O...
1/31/2011(Weepah)Columbus Gold Encounters Gold in 4 of 5 Initial Drill Holes ...
2/4/2011(Summit Project)(angl) Newmont to Acquire Fronteer & Long Canyon Project Loc...
2/5/2009(Summit Project)Announces Drilling Results at Nevada Gold Projects
11/19/2008(Scraper)Drilling Commences at Columbus Gold's Scraper Project
8/13/2008(Awakening)Completes Drilling at Awakening and Commences Phase II Drill...
7/8/2008(Chert Cliff)DRILLING COMMENCES ON COLUMBUS GOLD'S CHERT CLIFF PROPERTY
6/25/2008(Awakening)COMMENCES DRILLING AT AWAKENING
2/13/2008(Bolo)Announces Phase 1 Drill Results From Bolo
Corporate news of Columbus Gold Corporation
4/1/2017Columbus Gold Announces Voting Results of its Annual Meeting
12/31/2015Columbus Gold to List on the Toronto Stock Exchange
12/30/2015Columbus Commences Study to Connect Montagne d'Or Gold Proje...
12/23/2015Columbus Gold Farms-Out Mogollon Project
8/4/2015Columbus Gold Files Final PEA Report on Montagne d'Or Gold D...
7/28/2015Columbus Gold Advancing to Feasibility Study Stage at Montag...
7/14/2015Columbus Gold Provides Update on Eastside Gold Project Drill...
7/8/2015Columbus Gold Announces Positive PEA Results on Montagne d'O...
6/30/2015Columbus Gold Starts Phase III Drill Program on Montagne d'O...
6/25/2015Second Rig Commences Drilling at Columbus Gold's Eastside Go...
4/21/2015IIROC Trading Resumption - CGT
4/21/2015Columbus Gold Announces In-Pit Gold Resource of 3.8 M oz. In...
4/21/2015IIROC Trading Halt - CGT
3/30/2015Columbus Gold Outlines Two Additional Targets at Nevada East...
3/12/2015Columbus Gold Provides Project Update and Remaining Phase II...
3/10/2015Columbus Gold Drills 34.2 Meters of 2.16 g/t Gold at Western...
3/3/2015Additional Metallurgical Tests at Columbus Gold's Montagne d...
3/2/2015Columbus Gold to Obtain Mogollon Project
2/25/2015Columbus Gold Drills 142.2 Meters of 1.21 g/t Gold Including...
2/12/2015TSX Venture Exchange Ranks Columbus Gold in Top 10
2/10/2015Columbus Gold Drills 129.6 Meters of 1.11 g/t Gold At the Mo...
2/4/2015Columbus Gold Announces US$6.5 Million Exploration Program f...
1/22/2015IIROC Trading Resumption - CGT
1/22/2015French Government Does Not? Object to Columbus Gold's Agreem...
1/22/2015IIROC Trading Halt - CGT
1/13/2015Columbus Gold Drills 13.3 Meters of 7.12 g/t Gold at the Mon...
1/8/201595% Gold Recoveries From Metallurgical Tests at Columbus Gol...
12/16/2014Columbus Gold Drills 1.59 g/t Gold Over 95.4 Meters at Monta...
11/26/2014Columbus Gold Completes 25,570 Meter Phase II Drill Program ...
11/20/2014Columbus Gold Receives Additional Newsletter Writer Coverage
11/19/2014Columbus Gold Completes Environmental Baseline Field Studies...
10/28/2014Columbus Gold Drills 10.6 Meters of 5.23 g/t Gold at Montagn...
11/19/2013Columbus Gold
11/14/2013Columbus Gold
11/8/2013Columbus Gold
10/23/2013Columbus Gold
10/17/2013Columbus Gold
10/17/2013Drills 1.82 g/t Over 27 Meters at Eastside Gold Discovery in...
9/25/2013Columbus Gold
9/18/2013Columbus Gold
9/12/2013Columbus Gold
9/12/2013Forms French Advisory Board
5/21/2013Columbus Gold
5/21/2013Receives $5 Million from Royalty Sale
4/19/2013Columbus Gold
4/10/2013Columbus Gold
3/27/2013Columbus Gold
3/15/2013Columbus Gold
3/15/2013(Paul Isnard)Files National Instrument 43-101 Compliant Technical Report ...
2/5/2013Columbus Gold
1/10/2013Columbus Gold
10/29/2012Columbus Gold
6/14/2012Columbus Gold
5/31/2012Invite - Columbus Gold - Vancouver World Resource Investment...
5/17/2012Columbus Gold
4/13/2012Columbus Gold
4/13/2012Columbus Gold
4/2/2012Columbus Gold
3/29/2012Columbus Gold
3/22/2012Columbus Gold
3/20/2012Columbus Gold
3/19/2012Columbus Gold
3/2/2012Columbus Gold
2/28/2012Columbus Gold
2/21/2012Columbus Gold
2/16/2012Columbus Gold
1/30/2012Columbus Gold
12/22/2011Columbus Gold
12/15/2011Columbus Gold
12/7/2011Columbus Gold
12/6/2011Columbus Gold
12/5/2011Columbus Gold
11/30/2011Columbus Gold
11/24/2011Columbus Gold
10/13/2011Columbus Gold
10/7/2011Columbus Gold
9/21/2011Columbus Gold
9/8/2011Columbus Gold
8/18/2011Columbus Gold
11/13/2008News Release
9/22/2008Columbus Silver Completes IPO
7/3/2008Starts 6,000-Metre Drill Program in the Dominican Republic
5/12/2008CORPORATE UPDATE
5/6/2008be featured on CNBC
5/5/2008Spin Out Silver Properties in IPO
5/2/2008ACQUIRES NEVADA GOLD PROPERTY; DRILLING PERMITED
3/7/2008Carrelton Asset Management Increases Stake in Columbus Gold ...
11/1/2007 Commences Drilling At Its Bolo Gold Project In Nevada
10/5/2007Phase 2 Drill Program Commences at Dutch Flat
9/25/2007Options Nevada Property To Ventura Gold
9/20/2007Newmont Farms Into Columbus Gold Nevada Gold Property
8/17/2007(Audio) Radio Interview with Columbus Gold President & CEO R...
6/11/2007Agnico Eagle Enters Into Us$3 Million Joint Venture Agreemen...
5/2/2007Receives Phase I Drill Results From Overland Pass
3/19/2007Drilling Commences At Columbus Gold'S Four Metals Project
3/21/2007Gold And Cordex Extend Exclusive Agreement
2/23/2007Drilling Expands Dimensions Of Gold Deposit At Golden Mile
Comments closed
 
Latest comment posted for this article
Be the first to comment
Add your comment
TSX-V (CGT.V)OTHER OTC (CBGDF)
0.345+0.00%0.120-7.69%
TSX-V
CA$ 0.345
01/25 15:59 -
0%
Prev close Open
0.350 0.350
Low High
0.345 0.355
Year l/h YTD var.
 -  -
52 week l/h 52 week var.
- -  0.345 -4.17%
Volume 1 month var.
18,500 -4.17%
24hGold TrendPower© : -5
Produces
Develops Gold - Silver
Explores for Antimony - Copper - Gold - Iron - Lead - Silver - Zinc
 
 
 
Analyse
Interactive chart Add to compare
Interactive
chart
Print Compare Export
You must be logged in to use the porfolio and watchlists (free)
Top Newsreleases
MOST READ
Annual variation
DateVariationHighLow
 
5 years chart
 
3 months chart
 
3 months volume chart
 
 
Mining Company News
Plymouth Minerals LTDPLH.AX
Plymouth Minerals Intersects Further High Grade Potash in Drilling at Banio Potash Project - Plannin
AU$ 0.12-8.00%Trend Power :
Santos(Ngas-Oil)STO.AX
announces expected non-cash impairment
AU$ 7.43+0.41%Trend Power :
Oceana Gold(Au)OGC.AX
RELEASES NEW TECHNICAL REPORT FOR THE HAILE GOLD MINE
AU$ 2.20+0.00%Trend Power :
Western Areas NL(Au-Ni-Pl)WSA.AX
Advance Notice - Full Year Results Conference Call
AU$ 3.86+0.00%Trend Power :
Canadian Zinc(Ag-Au-Cu)CZN.TO
Reports Financial Results for Q2 and Provides Project Updates
CA$ 0.12+4.55%Trend Power :
Stornoway Diamond(Gems-Au-Ur)SWY.TO
Second Quarter Results
CA$ 0.02+100.00%Trend Power :
McEwen Mining(Cu-Le-Zn)MUX
TO ACQUIRE BLACK FOX FROM PRIMERO=C2=A0
US$ 5.82+6.79%Trend Power :
Rentech(Coal-Ngas)RTK
Rentech Announces Results for Second Quarter 2017
US$ 0.20-12.28%Trend Power :
KEFIKEFI.L
Reduced Funding Requirement
GBX 0.83-0.60%Trend Power :
Lupaka Gold Corp.LPK.V
Lupaka Gold Receives First Tranche Under Amended Invicta Financing Agreement
CA$ 0.08-11.11%Trend Power :
Imperial(Ag-Au-Cu)III.TO
Closes Bridge Loan Financing
CA$ 2.06-2.14%Trend Power :
Guyana Goldfields(Cu-Zn-Pa)GUY.TO
Reports Second Quarter 2017 Results and Maintains Production Guidance
CA$ 1.84+0.00%Trend Power :
Lundin Mining(Ag-Au-Cu)LUN.TO
d Share Capital and Voting Rights for Lundin Mining
CA$ 8.51+2.78%Trend Power :
Canarc Res.(Au)CCM.TO
Canarc Reports High Grade Gold in Surface Rock Samples at Fondaway Canyon, Nevada
CA$ 0.18+0.00%Trend Power :
Havilah(Cu-Le-Zn)HAV.AX
Q A April 2017 Quarterly Report
AU$ 0.30+1.67%Trend Power :
Uranium Res.(Ur)URRE
Commences Lithium Exploration Drilling at the Columbus Basin Project
US$ 6.80-2.86%Trend Power :
Platinum Group Metals(Au-Cu-Gems)PTM.TO
Platinum Group Metals Ltd. Operational and Strategic Process ...
CA$ 2.47+0.82%Trend Power :
Devon Energy(Ngas-Oil)DVN
Announces $340 Million of Non-Core Asset Sales
US$ 68.45-0.10%Trend Power :
Precision Drilling(Oil)PD-UN.TO
Announces 2017Second Quarter Financial Results
CA$ 8.66-0.35%Trend Power :
Terramin(Ag-Au-Cu)TZN.AX
2nd Quarter Report
AU$ 0.03+0.00%Trend Power :