Metallurg, Inc.

Published : April 20th, 2017

Trilogy Metals Announces Metallurgical, Geotechnical and Hydrogeological Results From the Arctic Dep

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

Trilogy Metals testing recovers 92% of Arctic Cu

Trilogy Metals Inc (C:TMQ) 
Shares Issued 105,520,261
Last Close 4/18/2017 $0.90
Wednesday April 19 2017 - News Release

Mr. Rick Van Nieuwenhuyse reports

TRILOGY METALS ANNOUNCES METALLURGICAL, GEOTECHNICAL AND HYDROGEOLOGICAL RESULTS FROM THE ARCTIC DEPOSIT

Trilogy Metals Inc. has provided the results of a recently completed metallurgical test work program using sample material from the Arctic deposit collected during the 2016 field season. This metallurgical test program was carried out as a follow-on program to confirm previous metallurgical results completed in 2012 and in support of advancing the project to a pre-feasibility study ("PFS") planned for completion in Q1 2018.

Highlights - Recoveries and Concentrate Grades Improved from Previous Study

Copper recoveries improved from 87% to 92%

Zinc recoveries improved from 87% to 88%

Copper concentrate average grade remains high at 29%

Zinc concentrate average grade improves from 56% to 60%

In-pit geotechnical and hydrology studies are now completed to a PFS level

The results demonstrate that excellent recoveries and clean concentrates of copper and zinc can be generated from the polymetallic copper-lead-zinc-gold-silver ores at Arctic. Concentrates of copper recovered an average of 91.7% of the copper and formed a concentrate averaging 28.7% copper metal. Concentrates of zinc recovered an average of 87.8% of the zinc and formed a concentrate averaging 60% zinc metal. Neither concentrate contains significant deleterious penalty metals and are considered excellent quality by world standards.. The lead concentrate contains significant precious metals and is still undergoing further test work to determine optimal recoveries for lead, gold and silver.

The Arctic deposit is a high-grade copper-zinc-lead volcanogenic massive sulfide deposit which also contains significant amounts of precious metals. The Company is proposing a 10,000 tonne per day, open pit mining operation with a typical crush-grind-float flow sheet producing significant tonnages of copper and zinc concentrates and lessor lead concentrate containing significant quantities of precious metals. The mineralized material from Arctic has been shown to be amenable to traditional flotation methods for the production of saleable base-metal concentrates. The results of this recent test work program, completed by ALS Metallurgy of Kamloops, Canada, were in-line with previous results reported in the Company's National Instrument 43-101 - Standards of Disclosure technical report entitled "Preliminary Economic Assessment Report on the Arctic Project, Ambler Mining District, Northwest Alaska" dated effective September 12, 2013 (the "PEA") (see press release dated September 12, 2013) and will support a PFS to be completed in Q1, 2018.

Rick Van Nieuwenhuyse, President and CEO of Trilogy Metals commented, "We are very pleased with the results of this metallurgical test work program at Arctic. Recoveries and concentrate grades for our two principle metals - copper and zinc are excellent. We are currently conducting additional test work to determine the optimal recoveries of our three other metals - lead, gold and silver, and will report on that work in due course. In combination with recently completed structural, hydrological and geotechnical work, we are well poised to kick-off the approved 2017 plan and budget and complete a PFS on Arctic in Q1 of 2018. The PFS will demonstrate the true value of the high-grade Arctic deposit which we expect will be the first in a series of potential mines in the Ambler mining district. With the recent announcement that the BLM has initiated the permitting process on the AMDIAP; our recently announced option agreement with South32 whereby they will fund a $10 million program at our Bornite deposit in 2017; and an upswing in demand for copper and zinc, the Company is well positioned to add value for shareholders by advancing development of the Ambler mining district."

The revenue stream in the PEA (see figure 1 below) showed that copper produced 60% of the revenue stream, with zinc contributing 21%, silver at 9% and gold at 6%. Lead was the least valuable of the metals and is still undergoing further test work to determine optimal recoveries for lead, gold and silver. Neither the zinc nor the copper concentrates contain any significant deleterious penalty metals and are considered excellent quality by world standards.

Metallurgical Update

A total of four Diamond drill holes were completed during the 2016 field program to provide whole core for sample materials in this test work program. Drilling targeted the first seven years of planned mine production from the Arctic deposit and provided 14 major mineralized intercepts for use in the test work program.

The metallurgical flow sheet envisions a truck and shovel open-pit mining operation followed by a traditional crush-grind-float processing facility. Grinding test work completed on the 14 mineralized intercepts confirmed the material to be soft to moderate in terms of Bond Work Index characterization. Bond Ball Mill work index averaged 7.6kWhr/tonne, with a maximum value of 10.3 and minimum value of 5.3.

A composite sample of approximately 600 kilograms was prepared from the mineralized intercepts and used for metallurgical concentration test work. This composite sample was used in bench scale testing to confirm the performance of the previously defined flotation process; as well, a large volume of the sample was processed in a pilot plant to provide sufficient volumes of a copper-lead bulk concentrate to complete detailed copper and lead separation test work. A flowsheet of the Arctic flotation process is shown in Figure 2.

Metallurgical test work, as shown in Table 1, reflects good recovery and upgrading of copper, lead and zinc values. The Arctic deposit contains talc, a naturally hydrophobic mineral. Talc is recovered via flotation prior to base metals flotation. Copper and zinc losses associated with the talc concentrate are less than one percent of the overall base metals. Copper and zinc concentrates as defined in this test work program are considered to be excellent in terms of concentrate grades. The lead concentrate which contains significant precious metals will be subject to further economic analysis and possibly additional metallurgical testing for the recovery of precious metals.

Table 1: Arctic Deposit - Overall Metallurgical Performance (Bulk Sample)
  
  
   Grades             Metal Recoveries    
                                                      
Product           Cu   Pb   Zn   Au  Ag   Cu    Pb    Zn    Au   Ag  
                   %    %    %  g/t g/t    %     %     %     %    %   
                                                      
Flotation Feed  3.13 0.93 4.75 0.61  46  100   100   100     -    -   
                                                      
Pre-float Conc. 0.20 0.15 0.27 0.06   5  0.8   2.0   0.7     -    -   
                                                      
Lead Conc.      2.72 23.8 1.32 7.12 933  2.4  76.9   0.9  63.4 59.4
                                                      
Copper Conc.    28.7 1.03 2.97 0.35 113 91.7  11.8   6.9  11.0 26.0
                                                      
Zinc Conc.      0.79 0.24 60.0 0.44  24  1.8   1.8  87.8     -    -   
                                                      
Final Tails     0.16 0.10 0.25 0.19  7   3.3   7.5   3.8     -    -   
                                                      
                                                      
  

Geotechnical & Hydrology Update

In spring of 2015, Trilogy Metals contracted SRK Consulting (Canada) Inc. to initiate open pit geotechnical and hydrogeological field investigations to achieve prefeasibility level design for the Arctic Project. SRK's scope of work consisted of three broad phases, spanning two years of staged technical investigations.

Phase 1 focussed on data collection by means of a field investigation program tied to the Arctic 2015 and 2016 exploration drilling programs. Geotechnical information collected from the drilling programs included geotechnical rock mass classification data from oriented drill core, testing of drill core for laboratory-derived rock properties, and downhole acoustic and optical televiewer surveying. Hydrogeological testing included packer testing, installation and monitoring of new and existing instrumentation within the proposed open pit area, airlift testing and seepage surveys. As input for the engineering studies, SRK also completed a structural geology study, and developed a fault model based on field mapping, surface LiDAR data interpretation, drill hole logging and a 3D geology model provided by Trilogy staff.

Phase 2 undertook advanced geotechnical and hydrogeological characterization and analyses, which resulted in the identification of six relevant geotechnical design sectors for the planned open pit.

Phase 3 included kinematic analyses, numerical modelling of representative pit sections and derivation of overall, inter-ramp and bench scale slope design recommendations for each geotechnical design sector.

Final inter-ramp angles per design sector vary depending on the slope direction within the design sector, but in general are 26 to 56 degrees (see Figure 3). We are pleased to report that SRK completed a final report documenting the structural, hydrological and geotechnical work in February 2017 - this completes the work package to a Pre-feasibility level of study.

Qualified Persons

The metallurgical information in this news release has been prepared in accordance with Canadian regulatory requirements set out in National Instrument 43-101 Standards of Disclosure for Mineral Projects of the Canadian Securities Administrators ("NI 43-101") and supervised and reviewed by Jeffrey B.. Austin, P.Eng., President, of International Metallurgical and Environmental Inc., a "Qualified Person" as defined in National Instrument 43-101 and the person who oversees metallurgical developments for Trilogy Metals.

The 2015 and 2016 geotechnical and hydrological field investigations, technical analysis and slope design recommendations were completed by Qualified Persons employed by SRK Consulting (Canada) Inc. of Vancouver, Canada. Bruce Murphy P..Eng., Principal Consultant with SRK, is a Qualified Person as defined by National Instrument 43-101. Mr. Murphy has reviewed the geotechnical and hydrological technical information in this news release and approves the disclosure contained herein.

About Trilogy Metals

Trilogy Metals Inc., formerly NovaCopper Inc., is a metals exploration company focused on exploring and developing the Ambler mining district located in northwestern Alaska. It is one of the richest and most-prospective known copper-dominant districts located in one of the safest geopolitical jurisdictions in the world. It hosts world-class polymetallic VMS deposits that contain copper, zinc, lead, gold and silver, and carbonate replacement deposits which have been found to host high grade copper mineralization. Exploration efforts have been focused on two deposits in the Ambler mining district - the Arctic VMS deposit and the Bornite carbonate replacement deposit. Both deposits are located within the Company's land package that spans approximately 143,000 hectares. The Company has an agreement with NANA Regional Corporation, Inc., a Regional Alaska Native Corporation that provides a framework for the exploration and potential development of the Ambler mining district in cooperation with local communities. Our vision is to develop the Ambler mining district into a premier North American copper producer.

We seek Safe Harbor.

You are currently subscribed to investor1 as: .com
Add nri@nrinvestor.com to your email address book to ensure delivery.
 |   |   |   | Snooze
Net Atlantic
.
Data and Statistics for these countries : Canada | All
Gold and Silver Prices for these countries : Canada | All

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

Metallurg is a producing company based in United states of america.

Your feedback is appreciated, please leave a comment or rate this article.
Rate : Average note :0 (0 vote) View Top rated
 
Financings of
9/5/2013Radcliff Metallurgical Study Results / 15,000,000 Unit Priva...
Project news of
6/1/2017Plymouth Minerals' Metallurgical Testwork confirms developme...
4/20/2017Trilogy Metals Announces Metallurgical, Geotechnical and Hyd...
4/6/2017Plymouth Minerals Reports Exceptional Metallurgical Results ...
3/15/2017KTN.v Reports Follow Up Metallurgical Leach Testing Underway
3/15/2017KOOTENAY REPORTS FOLLOW UP METALLURGICAL LEACH TESTING UNDER...
3/7/2017Corazon Mining Reports 7.38% Cobalt Concentrate at Mt Gilmor...
2/7/2017Metallurgical Testing and Drill Data at Bullfrog Golds Nevad...
1/22/2017KOOTENAY REPORTS METALLURGICAL TESTING ON LA CIGARRA DEPOSIT...
8/22/2016Metals of Africa reports further High Grade Metallurgical Re...
6/8/2016Metals of Africa reports exceptional Metallurgical Results a...
4/21/2016Pilot Gold Commences Core Drilling and Metallurgical Program...
9/30/2015Balmoral Reports Positive Metallurgical Results From Initial...
11/24/2014WPG completes metallurgical sampling program at Tarcoola gol...
10/28/2014Global Recoveries of 94.6% Gold and 97.8% Copper Realized in...
8/20/2014Borborema Gold Project - Drilling, Metallurgy and Optimisati...
6/27/2014Freegold Announces Positive Metallurgical Test Results Golde...
5/5/2014Gruyere Metallurgical Testing Delivers High Recoveries
10/11/2013Released ASX Announcement: Positive Metallurgy Results - Pil...
9/4/2013New Talisman Stock Exchange Release today - Maiden Ore Reser...
8/1/2013Natougou Gold Deposit - Positive Metallurgical Test Results
7/18/2013Melkior Reports 95% Gold Recovery from Preliminary Metallurg...
4/24/2013Melkior Reports 87% Gold Recoveries from Preliminary Metallu...
1/28/2013FURTHER METALLURGICAL TESTING ON NEW LIBERTY ORE
12/11/2012International Tower Hill Announces Positive Metallurgical T...
8/16/2012Advanced Explorations Inc. Metallurgical Pilot Plant Test Re...
7/24/2012European Uranium Completes Metallurgical Drilling Program at...
5/15/2012Excellent metallurgical gold recoveries confirmed & final pl...
4/12/2012Focus Metals Releases Update on Lac Knife Metallurgical Test...
2/29/2012Rogue Iron Ore Commences Metallurgical Testing On Radio Hil...
Corporate news of
3/6/2017Vendetta's Metallurgical Test Work Yields Excellent Recoveri...
3/1/2017Wellgreen Platinum Ltd. - Wellgreen Platinum Announces Resul...
2/10/2017Wellgreen Platinum Ltd. - Wellgreen Platinum Announces Compl...
8/4/2016Pilot Gold =E2?? RC=2FCore Drill Results & Metallurgical Upd...
1/25/2016Lundin Gold Announces Positive Metallurgical Results at Frut...
10/22/2015KOOTENAY REPORTS POSITIVE RESULTS AND HIGH RECOVERY RATES FR...
9/17/2015Pilot Gold reports metallurgical results from Valley Porphy...
7/13/2015Pilot Gold reports metallurgical results from upper gold hos...
7/29/2014Asanko Gold Announces Positive Metallurgical Results from Dy...
3/6/2014Lexam Preliminary Metallurgical Work Yields Ex =?ISO-8859-1?...
2/3/2014Exceptional Metallurgical Test Results from Gruyere Prospect
1/29/2014Northern Vertex Provides Metallurgical Update for Phase I - ...
7/18/2013Melkior Resources reports 95% gold recovery from preliminary...
7/12/2013Positive 7B Metallurgical Tests
7/5/2013Northern Vertex Advises Metallurgical Results on Low Grade M...
7/2/2013Metallurgical Results For Crucero Gold Project's A-1 Zone
7/2/2013Silver Bull Announces Updated Metallurgical Test Results On ...
5/30/2013Brewery Creek\222s Metallurgical...
5/1/2013Goldrock News Release =2D Arizaro Metallurgical Results
3/13/2013McEwen Mining Los Azules Metallurgical Update
2/14/2013Metallurgy Tests Return Favourable Results for In=2DSitu Rec...
12/11/2012Preliminary Metallurgical Recoveries Exceed 95%
10/26/2012Quest Engages Hatch to Undertake Advanced Metallurgical and
10/16/2012Aldridge - Aldridge Confirms Metallurgical Performance
10/4/2012Metallurgy Results Indicate Uranium Recoveries Of Up To 94% ...
9/27/2012Moneta Announces Positive Metallurgical Results on Golden Hi...
9/20/2012Metallurgical Developments Continue to Advance and De-Risk P...
7/30/2012Positive Metallurgical Results for Crater Mountain, PNG
5/15/2012Quest Completes Bulk of Phase II Metallurgical Testwork: Pro
5/10/2012SGS Mineral Services Metallurgical Test Results
12/1/2011Aldridge - Aldridge Minerals Announces Results of Yenipazar ...
10/11/2011Encouraging Metallurgical Testwork at Fekola [Papillon Reso...
8/16/2011METALLURGY OF THE ROSE DEPOSIT LITHIUM RECOVERY OF 90.7% AT ...
5/25/2011Quest Reviews Rare Earth Element Mineralogy and Metallurgy o
5/18/2011METALLURGICAL TESTWORK INDICATES POTENTIAL FOR SINTER FINES ...
2/15/2011Preliminary Metallurgical Testwork Yields Excellent Results
Comments closed
 
Latest comment posted for this article
Be the first to comment
Add your comment
Prev close Open
Low High
Year l/h YTD var.
 -  -
52 week l/h 52 week var.
- -  - -
Volume 1 month var.
-
Produces
Develops
Explores for
You must be logged in to use the porfolio and watchlists (free)
Top Newsreleases
MOST READ
Annual variation
 
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$ 8.18+0.74%Trend Power :
Oceana Gold(Au)OGC.AX
RELEASES NEW TECHNICAL REPORT FOR THE HAILE GOLD MINE
AU$ 3.45+1.77%Trend Power :
Western Areas NL(Au-Ni-Pl)WSA.AX
Advance Notice - Full Year Results Conference Call
AU$ 2.98+0.34%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$ 1.54-6.10%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 1.74+2.35%Trend Power :
Lupaka Gold Corp.LPK.V
Lupaka Gold Receives First Tranche Under Amended Invicta Financing Agreement
CA$ 0.01-33.33%Trend Power :
Imperial(Ag-Au-Cu)III.TO
Closes Bridge Loan Financing
CA$ 1.73-4.95%Trend Power :
Guyana Goldfields(Cu-Zn-Pa)GUY.TO
Reports Second Quarter 2017 Results and Maintains Production Guidance
CA$ 0.66+4.76%Trend Power :
Lundin Mining(Ag-Au-Cu)LUN.TO
d Share Capital and Voting Rights for Lundin Mining
CA$ 7.61+4.39%Trend Power :
Canarc Res.(Au)CCM.TO
Canarc Reports High Grade Gold in Surface Rock Samples at Fondaway Canyon, Nevada
CA$ 0.06+0.00%Trend Power :
Havilah(Cu-Le-Zn)HAV.AX
Q A April 2017 Quarterly Report
AU$ 0.10+0.00%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$ 1.88+0.53%Trend Power :
Devon Energy(Ngas-Oil)DVN
Announces $340 Million of Non-Core Asset Sales
US$ 22.56+3.30%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$ 0.04+0.00%Trend Power :