Welcome!

News Feed Item

Positive Metallurgical and Drilling Results at Bombore

Scrubbed coarse ore column test yields recovery of 88%

OTTAWA, ONTARIO -- (Marketwired) -- 07/10/14 -- Orezone Gold Corporation (TSX:ORE) is pleased to announce an update of the ongoing feasibility work and 21,000 m drill program at its 100%-owned Bombore Gold Project in Burkina Faso.

Scrubbed Ore Column Test Results

Final results for the initial coarse ore column test of the scrubbed saprolite ore have now been issued by Kappes, Cassiday & Associates (KCA) in Reno, Nevada. Overall gold recovery has been calculated at 88%, with all size fractions showing excellent percolation rates and gold extraction in the 80 and 90 percent range. The leach curve follows the signature 'fast leach kinetics' of the gold content typical of Bombore ore, with the majority of gold extraction taking place within the first few days of solution application. Screen analysis on the heads and tails indicate very little, if any, degradation of the size fractions.

Testwork on a second column containing scrubbed coarse ore is nearing completion and exhibits the same excellent leach characteristics, with estimated recovery to be in the high 80 to low 90 percent gold extraction range. The column will be rinsed and sent for assays in the coming days with final results expected in August.

A second round of metallurgical tests using 2.2 tonnes of oxide core is being initiated this month at KCA. The work is designed to emulate the modified flowsheet that combines heap leaching (HL) with agitated leach tanks (CIL). The results are expected to confirm or improve upon the already excellent leaching properties of the Bombore oxide ores. Tests will include further scrubbing of the ore for coarse column leach tests on the +0.212 mm fractions and CIL tests on the -0.212 mm fractions. Rheological and physical characteristic tests will also be performed to assist with the sizing and design of the equipment for the combined HL/CIL plant.

Heap Leach Pad Over Liner

Test results on the scrubbed crushed ore continue to show that it is acceptable for use as over liner material (drainage material on top of the liner) on the leach pad, thereby significantly reducing the capital cost of crushing and screening gravel from local quarries. The February 2014 Bombore Preliminary Economic Assessment includes approximately $20M of total capital expenditures for gravel as over liner material. In addition to the positive compaction and percolation tests performed earlier on the coarse ore, recent abrasion tests also indicate that the material will meet the required over liner specifications. Further tests will be completed as part of the final program of metallurgical and geotechnical studies underway with KCA and Golder.

Scrubber Tests

KCA also analyzed the material specifications and process parameters of the oxide ore scrubbed for the coarse column test work with positive results. Scrubbing efficiency of greater than 90% is realized within 3 to 5 minutes. This coincides with earlier tests carried out by Met Solve on saprolitic ores which indicated approximately 3 minutes scrubber residence time after crushing to less than 75 mm. The two separate tests indicate that scrubbing is most effective in water at 50% solids. Both tests also indicated that the coarse/fine split (+0.212 mm/-0.212 mm) is approximately 35%/65% on the saprolitic ores with less than 10% of the fine fraction remaining in the coarse split after scrubbing is complete.

21,000 m Drilling Program

Since April 2014, 17,000 m of RC and 1,100 m of core drilling has been completed. The program is focused on infilling and upgrading of the oxide resource in the northern half of the deposit. The remaining 3,000 m of RC should be completed by the end of the month. Results have been received for only 130 holes or 8,600 m. An additional 29,000 m of drill results from last year's drill program have not been included in the 2013 resource estimation. Highlights of all the results not included in the latest (2013) resource estimation are as follows:


--  Core holes - 1.37 g/t is the weighted average grade of the mineralized
    intervals from the core holes excluded from the 2013 resource, above a
    lower cut-off of 0.5 g/t, with all assays cut to 5 g/t. 
--  RC holes - 1.08 g/t is the weighted average grade of the mineralized
    intervals from the RC holes excluded from the 2013 resources, above a
    lower cut-off of 0.5 g/t, with all assays cut to 5 g/t. 
--  A total of 607 RC holes (33,265 m) have now been reported since the 2013
    resource, representing an increase of 13% with respect to the meterage
    included within the 2013 resource. 
--  The next resource update is planned for Q1 2015 which will include the
    50,000 m of drill results.

Approximately 600 m of drilling was focused on new near-surface higher grade sulphide target (P17S) located along the main shear zone trend, 2 km south of Bombore. This zone was discovered in a previous program but required further drilling to confirm its significance and geometry. Results from 32 core and RC holes indicate a deformed and shallowly dipping granodiorite unit that averages 7.1 m in thickness (true width is approximately 85%) with an average uncut grade of 2.65 g/t (using a 0.35 g/t cutoff). The drilling extends over an area of about 1 hectare with an average depth to the mineralized unit of only 28 m; the deepest intersection is 55 m. Projecting the geology to a depth of 100 m could double the prospective area. All assays were performed using a 1kg bottle roll technique (identical to the other Bombore samples) with indicative cyanide soluble recoveries over 95%. Although these results are interesting with grades more than double the average grade of the Bombore resource, further drilling is not likely to occur until after the Bombore oxide deposit is developed.

Click here for a complete list of drill results and analytical procedures referred to in this release.

About Orezone Gold Corporation

Orezone is a Canadian company with a gold discovery track record of +12 Moz and recent mine development experience in Burkina Faso, West Africa. The Company owns a 100% interest in Bombore, the largest undeveloped oxide gold deposit in West Africa which is situated 85 km east of the capital city, adjacent to an international highway. The Company is continuing with various technical studies in order to be in a position to complete a full feasibility study and an application for a mining permit before year-end.

Carl Defilippi of Kappes Cassiday & Associates; and Tim Miller, COO, Pascal Marquis, SVP Exploration and Ron Little, CEO of Orezone, are Qualified Persons under National Instrument 43-101 and have reviewed the information in this release. Pascal Marquis is the Qualified Person in charge of the drilling program and related analysis.

FORWARD-LOOKING STATEMENTS AND FORWARD-LOOKING INFORMATION: This news release contains certain "forward-looking statements" within the meaning of applicable Canadian securities laws. Forward-looking statements and forward-looking information are frequently characterized by words such as "plan", "expect", "project", "intend", "believe", "anticipate", "estimate", "potential", "possible" and other similar words, or statements that certain events or conditions "may", "will", "could", or "should" occur. Forward-looking statements in this release include statements regarding, among others; completing various technical studies for Bombore in 2014 and their potential impact on the economic returns on the project, completing the FS and applying for a mining permit by year-end 2014, updating the resource model and mine plan in Q1 2015, and becoming a mid-tier gold producer.

FORWARD-LOOKING STATEMENTS are based on certain assumptions, the opinions and estimates of management at the date the statements are made, and are subject to a variety of risks and uncertainties and other factors that could cause actual events or results to differ materially from those projected in the forward-looking statements. These factors include the inherent risks involved in the exploration and development of mineral properties, the uncertainties involved in interpreting drilling results and other geological and geotechnical data, fluctuating metal prices, the possibility of project cost overruns or unanticipated costs and expenses, the ability of contracted parties (including laboratories and drill companies to provide services as contracted); uncertainties relating to the availability and costs of financing needed in the future and other factors. The Company undertakes no obligation to update forward-looking statements if circumstances or management's estimates or opinions should change. The reader is cautioned not to place undue reliance on forward-looking statements. Comparisons between any resource model and estimates with the subsequent drill results are preliminary in nature and should not be relied upon as potential qualified changes to any future resource updates or estimates.

Readers are advised that National Instrument 43-101 of the Canadian Securities Administrators requires that each category of mineral reserves and mineral resources be reported separately. Readers should refer to the annual information form of Orezone for the year ended December 31, 2013 and other continuous disclosure documents filed by Orezone since January 1, 2014 available at www.sedar.com, for this detailed information, which is subject to the qualifications and notes set forth therein.

Contacts:
Orezone
(613) 241-3699
Toll Free: (888) 673-0663

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
Between 2005 and 2020, data volumes will grow by a factor of 300 – enough data to stack CDs from the earth to the moon 162 times. This has come to be known as the ‘big data’ phenomenon. Unfortunately, traditional approaches to handling, storing and analyzing data aren’t adequate at this scale: they’re too costly, slow and physically cumbersome to keep up. Fortunately, in response a new breed of technology has emerged that is cheaper, faster and more scalable. Yet, in meeting these new needs they...
Complete Internet of Things (IoT) embedded device security is not just about the device but involves the entire product’s identity, data and control integrity, and services traversing the cloud. A device can no longer be looked at as an island; it is a part of a system. In fact, given the cross-domain interactions enabled by IoT it could be a part of many systems. Also, depending on where the device is deployed, for example, in the office building versus a factory floor or oil field, security ha...
An IoT product’s log files speak volumes about what’s happening with your products in the field, pinpointing current and potential issues, and enabling you to predict failures and save millions of dollars in inventory. But until recently, no one knew how to listen. In his session at @ThingsExpo, Dan Gettens, Chief Research Officer at OnProcess, discussed recent research by Massachusetts Institute of Technology and OnProcess Technology, where MIT created a new, breakthrough analytics model for s...
When it comes to cloud computing, the ability to turn massive amounts of compute cores on and off on demand sounds attractive to IT staff, who need to manage peaks and valleys in user activity. With cloud bursting, the majority of the data can stay on premises while tapping into compute from public cloud providers, reducing risk and minimizing need to move large files. In his session at 18th Cloud Expo, Scott Jeschonek, Director of Product Management at Avere Systems, discussed the IT and busin...
"We are the public cloud providers. We are currently providing 50% of the resources they need for doing e-commerce business in China and we are hosting about 60% of mobile gaming in China," explained Yi Zheng, CPO and VP of Engineering at CDS Global Cloud, in this SYS-CON.tv interview at 19th Cloud Expo, held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA.
In his general session at 19th Cloud Expo, Manish Dixit, VP of Product and Engineering at Dice, discussed how Dice leverages data insights and tools to help both tech professionals and recruiters better understand how skills relate to each other and which skills are in high demand using interactive visualizations and salary indicator tools to maximize earning potential. Manish Dixit is VP of Product and Engineering at Dice. As the leader of the Product, Engineering and Data Sciences team at D...
Keeping pace with advancements in software delivery processes and tooling is taxing even for the most proficient organizations. Point tools, platforms, open source and the increasing adoption of private and public cloud services requires strong engineering rigor - all in the face of developer demands to use the tools of choice. As Agile has settled in as a mainstream practice, now DevOps has emerged as the next wave to improve software delivery speed and output. To make DevOps work, organization...
"We are a custom software development, engineering firm. We specialize in cloud applications from helping customers that have on-premise applications migrating to the cloud, to helping customers design brand new apps in the cloud. And we specialize in mobile apps," explained Peter Di Stefano, Vice President of Marketing at Impiger Technologies, in this SYS-CON.tv interview at 19th Cloud Expo, held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA.
"We're a cybersecurity firm that specializes in engineering security solutions both at the software and hardware level. Security cannot be an after-the-fact afterthought, which is what it's become," stated Richard Blech, Chief Executive Officer at Secure Channels, in this SYS-CON.tv interview at @ThingsExpo, held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA.
In this strange new world where more and more power is drawn from business technology, companies are effectively straddling two paths on the road to innovation and transformation into digital enterprises. The first path is the heritage trail – with “legacy” technology forming the background. Here, extant technologies are transformed by core IT teams to provide more API-driven approaches. Legacy systems can restrict companies that are transitioning into digital enterprises. To truly become a lead...
In IT, we sometimes coin terms for things before we know exactly what they are and how they’ll be used. The resulting terms may capture a common set of aspirations and goals – as “cloud” did broadly for on-demand, self-service, and flexible computing. But such a term can also lump together diverse and even competing practices, technologies, and priorities to the point where important distinctions are glossed over and lost.
Video experiences should be unique and exciting! But that doesn’t mean you need to patch all the pieces yourself. Users demand rich and engaging experiences and new ways to connect with you. But creating robust video applications at scale can be complicated, time-consuming and expensive. In his session at @ThingsExpo, Zohar Babin, Vice President of Platform, Ecosystem and Community at Kaltura, discussed how VPaaS enables you to move fast, creating scalable video experiences that reach your aud...
All clouds are not equal. To succeed in a DevOps context, organizations should plan to develop/deploy apps across a choice of on-premise and public clouds simultaneously depending on the business needs. This is where the concept of the Lean Cloud comes in - resting on the idea that you often need to relocate your app modules over their life cycles for both innovation and operational efficiency in the cloud. In his session at @DevOpsSummit at19th Cloud Expo, Valentin (Val) Bercovici, CTO of Soli...
"Once customers get a year into their IoT deployments, they start to realize that they may have been shortsighted in the ways they built out their deployment and the key thing I see a lot of people looking at is - how can I take equipment data, pull it back in an IoT solution and show it in a dashboard," stated Dave McCarthy, Director of Products at Bsquare Corporation, in this SYS-CON.tv interview at @ThingsExpo, held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA.
What happens when the different parts of a vehicle become smarter than the vehicle itself? As we move toward the era of smart everything, hundreds of entities in a vehicle that communicate with each other, the vehicle and external systems create a need for identity orchestration so that all entities work as a conglomerate. Much like an orchestra without a conductor, without the ability to secure, control, and connect the link between a vehicle’s head unit, devices, and systems and to manage the ...