SYS-CON MEDIA Authors: Elizabeth White, Sean Houghton, Glenn Rossman, Ignacio M. Llorente, Xenia von Wedel

News Feed Item

Highland Copper Reports Initial Resource Estimate for the 543S Deposit, Upper Peninsula, Michigan

LONGUEUIL, QUEBEC -- (Marketwired) -- 08/25/14 -- Highland Copper Company Inc. (TSX VENTURE: HI) ("Highland" or the "Company") is pleased to announce an initial resource estimate for the 543S copper deposit part of the Keweenaw Project located in the Keweenaw Peninsula of Michigan's Upper Peninsula (see Figure 1).


              543S Project - Base Case - Underground Scenario
                   Mineral Resource Estimate - July 5, 2014

----------------------------------------------------------------------------
                 Cut-Off
                   Grade              Grade Grade             Grade
Resource         Cu Eq.    Tonnage   Cu Eq.   Cu     Copper      Ag   Silver
Category             (%)  ('000 t)      (%)   (%)('000 lbs)   (g/t)('000 oz)
----------------------------------------------------------------------------
Indicated            1.9     1,518     3.31  3.27   109,514     5.1      248
----------------------------------------------------------------------------
Inferred             1.9       193     3.12  3.08    13,116     4.8       30
----------------------------------------------------------------------------

Notes on Mineral Resources


1.  Cu Equivalent = Cu% + (Ag g/t (i) 20$/oz (i) 80% (i) 90%) / (22.0462
    lbs/10kg (i) 3$/lb (i) 31.1035 g/oz (i) 90% (i) 96.5%)
2.  Mineral Resources are reported using a copper price of 3$/lb and a
    silver price of 20$/oz
3.  A payable rate of 96.5% for copper and 90% for silver was assumed
4.  Preliminary metallurgical testing suggests recovery of 90% for copper
    and 80% for silver
5.  Cut-off grade of 1.9% Cu Eq. was used
6.  Underground mining costs are estimated at 57.27$/t of ore
7.  Production costs are estimated at 37.50$/t of ore: 12.00$/t for
    processing, 2.50$/t for general and administrative costs, 0.50$/t for
    tailings and 22.50$/t for ore transportation to White Pine Complex
8.  A 5% royalty was used (4.99$/t ore)
9.  No mining dilution and mining loss were considered for the Mineral
    Resources
10. Rock bulk densities are based on rock types, %Cu and proximity to
    specific gravity measurements
11. Assay capping was applied to some mineralized domains
12. Classification of Mineral Resources conforms to CIM definitions
13. The qualified person for the estimate is Mr. Rejean Sirois, eng., Vice
    President Geology and Resources of G Mining. The estimate has an
    effective date of July 5, 2014
14. Mineral resources, which are not mineral reserves, do not have
    demonstrated economic viability. The estimate of mineral resources may
    be materially affected by environmental, permitting, legal, title,
    taxation, sociopolitical, marketing, or other relevant issues.
15. The quantity and grade of reported inferred resources in this estimation
    are uncertain in nature and there has been insufficient exploration to
    define these inferred resources as indicated or measured mineral
    resources.

The mineral resource estimate was prepared by G Mining Services Inc. ("G Mining"), a Canadian mining consulting firm. After a detailed review of different options, Highland and G Mining have opted to report the mineral resources for potential underground development of the 543S deposit. This initial mineral resource estimate for the 543S copper deposit is based on 262 diamond drill holes totaling 45,608 m, of which 220 are NQ size and 42 HQ size, on a drill grid spaced 30.5 by 15 m.

Selection of cut-off grades and base case resource estimate

The table below, prepared by G Mining, shows the sensitivity of constrained underground resource estimates to the cut-off grade for the 543S resource.


 Sensitivity of the 543S Project - Constrained Underground Mineral Resource
                         Estimate by Cut-Off Grades

----------------------------------------------------------------------------
Cut Off Grade
% Cu Eq.                                Indicated
             ---------------------------------------------------------------
                                               Copper                 Silver
                                Grade       Contained   Grade      Contained
              Tonnage     Grade    Cu           ('000      Ag          ('000
             ('000 t) Cu Eq.(%)   (%)            lbs)   (g/t)            oz)
----------------------------------------------------------------------------
5.0%              163      6.21  6.16          22,166     7.1             37
----------------------------------------------------------------------------
4.5%              246      5.71  5.67          30,790     6.4             51
----------------------------------------------------------------------------
4.0%              364      5.24  5.20          41,748     6.1             71
----------------------------------------------------------------------------
3.5%              508      4.81  4.78          53,532     5.7             94
----------------------------------------------------------------------------
3.0%              715      4.36  4.32          68,101     5.4            126
----------------------------------------------------------------------------
2.5%              995      3.90  3.87          84,838     5.3            169
----------------------------------------------------------------------------
2.0%            1,406      3.41  3.38         104,817     5.1            231
----------------------------------------------------------------------------
1.9%            1,518      3.31  3.27         109,514     5.1            248
----------------------------------------------------------------------------
1.5%            2,070      2.87  2.84         129,809     4.8            320
----------------------------------------------------------------------------
1.0%            3,136      2.31  2.29         158,142     4.4            444
----------------------------------------------------------------------------
0.5%            4,993      1.72  1.70         187,130     3.9            621
----------------------------------------------------------------------------

 Sensitivity of the 543S Project - Constrained Underground Mineral Resource
                         Estimate by Cut-Off Grades

----------------------------------------------------------------------------
Cut Off Grade
% Cu Eq.                                 Inferred
             ---------------------------------------------------------------
                                               Copper                 Silver
                                Grade       Contained   Grade      Contained
              Tonnage     Grade    Cu           ('000      Ag          ('000
             ('000 t) Cu Eq.(%)   (%)            lbs)   (g/t)            oz)
----------------------------------------------------------------------------
5.0%               14      5.87  5.83           1,776     5.2              2
----------------------------------------------------------------------------
4.5%               27      5.30  5.27           3,163     5.1              4
----------------------------------------------------------------------------
4.0%               41      4.96  4.93           4,464     5.0              7
----------------------------------------------------------------------------
3.5%               59      4.58  4.55           5,960     4.8              9
----------------------------------------------------------------------------
3.0%               82      4.21  4.18           7,533     4.6             12
----------------------------------------------------------------------------
2.5%              112      3.81  3.78           9,359     4.8             17
----------------------------------------------------------------------------
2.0%              173      3.24  3.21          12,290     4.8             27
----------------------------------------------------------------------------
1.9%              193      3.12  3.08          13,116     4.8             30
----------------------------------------------------------------------------
1.5%              332      2.52  2.49          18,256     4.2             45
----------------------------------------------------------------------------
1.0%              751      1.79  1.77          29,267     4.0             97
----------------------------------------------------------------------------
0.5%            1,493      1.25  1.23          40,616     3.2            152
----------------------------------------------------------------------------

Mineral Resource Estimate Methodology

G Mining undertook the Mineral Resource estimate based on data provided by Highland. The estimate was conducted in a block model limited by eighteen mineralized domains interpreted and modelled as 3D wireframes. Capped raw assays were composited into regular 2.5-meter run lengths within each domain. Isotropic cubic blocks of 2.5 meters were used in the block model. Bulk densities were first estimated in each block based on regressions calculated from the correlation of 1,100 specific gravity measurements with their copper content, for three major rock types (flow-tops, dyke and basalt/host rock). Secondly, blocks within a 50 meter radius from specific gravity measurements, within the same rock type, were interpolated using those samples and were given a higher priority. Resulting estimated specific gravity of blocks inside domains varies from 2.52 g/cm3 to 3.04 g/cm3. Overburden density was set to a uniform 2.35 g/cm3. Copper and silver grades were estimated using the Inverse Distance Cube (ID3) interpolation method in three successive passes, which led to Indicated and Inferred Resources, limited by mineralized domains. The underground scenario resources were constrained by blocks with a minimum threshold value of 1.9% Cu equivalent, where isolated clusters of blocks were removed and an upper hard boundary was set at 15 m below the bedrock surface. Mineral Resources were classified according to the CIM Definition Standards on Mineral Resources and Mineral Reserves.

Metallurgical Work

A.C.A. Howe International first completed historical preliminary metallurgical studies in 1991 at the Institute of Materials Processing of Michigan Technological University on three samples of chalcocite from the 543S deposit. Concentrate grades from conventional flotation tests demonstrated over 40% Cu and recoveries over 90% were achievable at grinds between 200 and 270 mesh when combined with cleaning and re-cleaning of the rougher concentrates. A ball mill grindability work index of a composite of 19.36 KWh/t was also reported.

In February 2014 seven flotation tests were conducted on composite samples of drill core from the 543S deposit at SGS Laboratories in Lakefield, Ontario under the supervision of Ahmed Bouajila, Vice President, Metallurgy and Ore Processing for G Mining. The composite grade was 2.61% Cu and 3.9 g/t Ag. Copper recoveries reported for this work neglect the copper distribution contained in the cleaner tailings. In a continuous circuit the cleaner tailings would be re-circulated back to the rougher and cleaner flotation stages, respectively and a substantial part of it would be recovered in the final concentrate. The effect of this recirculation cannot be determined without running locked cycle tests or continuous pilot plant trials. It is concluded that reasonable expectation from an equivalent optimized and closed circuit would be:


--  Recoveries: 90% Cu, 80% Ag;
--  Concentrate grades: 44%Cu, 59g/t Ag ; and
--  Mass Pull: 5.5%.

Those numbers are used for the base case reported in this news release.

Geology of the 543S Deposit.

The 543S copper deposit is located within a zone of chalcocite-dominated copper mineralization that is unique to the Keweenaw Peninsula. The known chalcocite deposits in the Keweenaw region occur in a 30 kilometer long northeast-southwest trending belt located between the native copper-bearing lodes and the underlying Keweenaw Fault and hosted by the Portage Lake Lava series. Chalcocite mineralization primarily occurs as open space fillings in amygdaloidal and fragmental basalt flow tops. Historically, this type of mineralization has not been a major exploration target. The 543S deposit is the largest chalcocite occurrence found to date.

The basalt flows in the area of the 543S deposit are covered by up to 50 meters of glacial till and do not outcrop in the vicinity of the deposit. The flows have an average thickness of approximately 33 meters and are cut by two fine grained sill-like dacitic to andesitic subvolcanic intrusives (see Fig. 2). At the 543S copper deposit, more than 99% of the copper occurs in the mineral chalcocite and less than 1% is present as bornite, chalcopyrite, or as native copper. Traces of native silver are also present. Approximately 80 to 90% of chalcocite mineralization is concentrated in flow top breccias and amygdaloids where grades are the highest.

Future Plans

The 543S deposit is one of two lava flow top-hosted chalcocite deposits that have been subject to recent drilling programs by Highland, the other is the G-2 deposit located about 20 kilometers northeast of 543S. Highland plans to complete a resource estimate for G-2 in 2014. Although the possibility of an independent milling complex at 543S treating mineralization from both 543S and G-2 will be considered, Highland plans to evaluate alternatives that would treat mineralization from 543S and other undeveloped copper deposits in the Western Upper Peninsula of Michigan recently acquired by Highland, in a single center of metallurgical operations. Planned studies will evaluate an alternative that would involve transportation to and processing of mineralization from these deposits in a central mine and metallurgical complex, the location of which remains to be determined.

Qualified Persons

Rejean Sirois, Vice President of Geology and Resources for G Mining is the qualified person, as defined in National Instrument 43-101, responsible for the mineral resource estimate for the 543S deposit as reported herein. He has read and approved the relevant technical portions of this news release related to the mineral resource estimate for which he is responsible.

Ahmed Bouajila, Vice President, Metallurgy and Ore Processing for G Mining is the qualified person, as defined in National Instrument 43-101, responsible for supervising initial metallurgical test work on samples from the 543S deposit as reported herein. He has read and approved the relevant technical portions of this news release related to the metallurgical work for which he is responsible.

The balance of the technical information contained in this news release has been reviewed and approved by Ross R. Grunwald, PhD., VP Exploration for the Company. Dr. Grunwald is a qualified person as defined in NI 43-101.

G Mining is completing a National Instrument 43-101 technical report for the mineral resource estimate to be filed on SEDAR within 45 days of this press release.

Keweenaw Copper Project

The 543S deposit is part of the Keweenaw Copper Project that covers approximately 9,000 acres of mineral rights and is being explored under a Mining Venture Agreement between Highland and BRP LLC. The agreement allows Highland to earn a 65 percent interest by spending US$11.5 million on the project (which amount has been spent) and providing a feasibility study by October 26, 2015. The Keweenaw Project is approximately 180 km northeast of the White Pine North Project and 250 km of the Copperwood Project by road access.

Cautionary Statement

Mineral resources are not mineral reserves and do not have demonstrated economic viability. The terms "inferred" and "indicated" resources contains in this press release are recognized and required by NI 43-101 under Canadian regulations, but not recognized by the U.S. Securities and Exchange Commission ("SEC"). The SEC requires mining companies in their filings with the SEC to disclose only those mineral deposits that a company can economically and legally extract or produce. "Inferred resources" have a great amount of uncertainty as to their existence, and great uncertainty as to their economic and legal feasibility. It cannot be assumed that all or any part of an "inferred resource" will ever be upgraded to a higher category. Investors are cautioned not to assume that all or part of an inferred resource exists, or is economically or legally mineable and that all or any part of mineral deposits in the "measured" or "indicated" resource categories will ever be converted into reserves.

This press release contains 'forward-looking information' within the meaning of applicable Canadian securities legislation. Forward looking information in this news release includes information with respect to: the mineral resource estimate; the Company's plans to complete a mineral resource estimate at the G2 deposit; the timing and results of future studies; the geological and economic potential of the Keweenaw Project, including the possibility of developing an underground operation there; the potential to process mineralization with other deposits in a central mine; the completion of a feasibility study to earn 65% of the Keweenaw Project, and other statements and information regarding anticipated results regarding the Company's operations and exploration. Actual results may be materially different from those currently anticipated. Many factors, known and unknown, could cause the actual results to be materially different from those expressed or implied by such forward looking statements. Such risks include, but are not limited to: the volatility of copper price; the uncertainty of exploration results and mineral resource estimates, capital expenditure requirements and other costs; the uncertainties related to the Company's ability to acquire a 65% interest in the Keweenaw Project; currency fluctuations; the availability of financing for additional capital requirements, cost of exploration and development programs; mining risks; risks associated with governmental and environmental regulation and obtaining all the necessary permits for the development of the Project; and risks associated with global economic growth. The Company does not intend, and does not assume any obligation, to update these forward-looking statements and information, except as required by law. Accordingly, readers are advised not to place undue reliance on forward-looking statements.

About Highland

Highland Copper Company Inc. is a Canadian exploration company focused on exploring and developing copper projects within the Upper Peninsula of Michigan, U.S.A. Highland has recently completed the acquisition of the Copperwood Project and the interim closing of the White Pine Project. The common shares of Highland trade on the TSX Venture Exchange under the symbol 'HI'. Additional information about the Company is available on the Company's website at www.highlandcopper.com and on SEDAR at www.sedar.com.

Figures are available at the following address: http://file.marketwire.com/release/hi_0825.pdf

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.

More Stories By Marketwired .

Copyright © 2009 Marketwired. All rights reserved. All the news releases provided by Marketwired are copyrighted. Any forms of copying other than an individual user's personal reference without express written permission is prohibited. Further distribution of these materials is strictly forbidden, including but not limited to, posting, emailing, faxing, archiving in a public database, redistributing via a computer network or in a printed form.

Latest Stories
SYS-CON Media announced today that Sematext launched a popular blog feed on DevOps Journal with over 6,000 story reads over the weekend. DevOps Journal is focused on this critical enterprise IT topic in the world of cloud computing. DevOps Journal brings valuable information to DevOps professionals who are transforming the way enterprise IT is done. Sematext is a globally distributed organization that builds innovative Cloud and On Premises solutions for performance monitoring, alerting an...
SYS-CON Events announced today Isomorphic Software, the global leader in high-end, web-based business applications, will exhibit at SYS-CON's DevOps Summit 2015 New York, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. Isomorphic Software is the global leader in high-end, web-based business applications. We develop, market, and support the SmartClient & Smart GWT HTML5/Ajax platform, combining the productivity and performance of traditional desktop software ...
ScriptRock makes GuardRail, a DevOps-ready platform for configuration monitoring. Realizing we were spending way too much time digging up, cataloguing, and tracking machine configurations, we began writing our own scripts and tools to handle what is normally an enormous chore. Then we took the concept a step further, giving it a beautiful interface and making it simple enough for our bosses to understand. We named it GuardRail after its function - to allow businesses to move fast and stay sa...
In high-production environments where release cycles are measured in hours or minutes — not days or weeks — there's little room for mistakes and no room for confusion. Everyone has to understand what's happening, in real time, and have the means to do whatever is necessary to keep applications up and running optimally. DevOps is a high-stakes world, but done well, it delivers the agility and performance to significantly impact business competitiveness.
"Our premise is Docker is not enough. That's not a bad thing - we actually love Docker. At ActiveState all our products are based on open source technology and Docker is an up-and-coming piece of open source technology," explained Bart Copeland, President & CEO of ActiveState Software, in this SYS-CON.tv interview at DevOps Summit at Cloud Expo®, held Nov 4-6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
The Internet of Things is not new. Historically, smart businesses have used its basic concept of leveraging data to drive better decision making and have capitalized on those insights to realize additional revenue opportunities. So, what has changed to make the Internet of Things one of the hottest topics in tech? In his session at @ThingsExpo, Chris Gray, Director, Embedded and Internet of Things, discussed the underlying factors that are driving the economics of intelligent systems. Discover ...
"BSQUARE is in the business of selling software solutions for smart connected devices. It's obvious that IoT has moved from being a technology to being a fundamental part of business, and in the last 18 months people have said let's figure out how to do it and let's put some focus on it, " explained Dave Wagstaff, VP & Chief Architect, at BSQUARE Corporation, in this SYS-CON.tv interview at @ThingsExpo, held Nov 4-6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
The major cloud platforms defy a simple, side-by-side analysis. Each of the major IaaS public-cloud platforms offers their own unique strengths and functionality. Options for on-site private cloud are diverse as well, and must be designed and deployed while taking existing legacy architecture and infrastructure into account. Then the reality is that most enterprises are embarking on a hybrid cloud strategy and programs. In this Power Panel at 15th Cloud Expo (http://www.CloudComputingExpo.com...
Leysin American School is an exclusive, private boarding school located in Leysin, Switzerland. Leysin selected an OpenStack-powered, private cloud as a service to manage multiple applications and provide development environments for students across the institution. Seeking to meet rigid data sovereignty and data integrity requirements while offering flexible, on-demand cloud resources to users, Leysin identified OpenStack as the clear choice to round out the school's cloud strategy. Additional...
Verizon Enterprise Solutions is simplifying the cloud-purchasing experience for its clients, with the launch of Verizon Cloud Marketplace, a key foundational component of the company's robust ecosystem of enterprise-class technologies. The online storefront will initially feature pre-built cloud-based services from AppDynamics, Hitachi Data Systems, Juniper Networks, PfSense and Tervela. Available globally to enterprises using Verizon Cloud, Verizon Cloud Marketplace provides a one-stop shop fo...
The move in recent years to cloud computing services and architectures has added significant pace to the application development and deployment environment. When enterprise IT can spin up large computing instances in just minutes, developers can also design and deploy in small time frames that were unimaginable a few years ago. The consequent move toward lean, agile, and fast development leads to the need for the development and operations sides to work very closely together. Thus, DevOps become...
SYS-CON Events announced today that IDenticard will exhibit at SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. IDenticard™ is the security division of Brady Corp (NYSE: BRC), a $1.5 billion manufacturer of identification products. We have small-company values with the strength and stability of a major corporation. IDenticard offers local sales, support and service to our customers across the United States and Canada...
SYS-CON Media announced today that Aruna Ravichandran, VP of Marketing, Application Performance Management and DevOps at CA Technologies, has joined DevOps Journal’s authors. DevOps Journal is focused on this critical enterprise IT topic in the world of cloud computing. DevOps Journal brings valuable information to DevOps professionals who are transforming the way enterprise IT is done. Aruna's inaugural article "Four Essential Cultural Hacks for DevOps Newbies" discusses how to demonstrate the...
SYS-CON Events announced today that Windstream, a leading provider of advanced network and cloud communications, has been named “Silver Sponsor” of SYS-CON's 16th International Cloud Expo®, which will take place on June 9–11, 2015, at the Javits Center in New York, NY. Windstream (Nasdaq: WIN), a FORTUNE 500 and S&P 500 company, is a leading provider of advanced network communications, including cloud computing and managed services, to businesses nationwide. The company also offers broadband, p...
SYS-CON Events announced today that AIC, a leading provider of OEM/ODM server and storage solutions, will exhibit at SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. AIC is a leading provider of both standard OTS, off-the-shelf, and OEM/ODM server and storage solutions. With expert in-house design capabilities, validation, manufacturing and production, AIC's broad selection of products are highly flexible and are conf...