Welcome!

News Feed Item

Preliminary Oxide Heap Leach Testwork Delivers Excellent Results at the South Houndé Project

VANCOUVER, April 7, 2014 /PRNewswire/ - Sarama Resources Ltd. ("Sarama" or the "Company") is pleased to announce that preliminary metallurgical testing at its South Houndé Project in south-west Burkina Faso has returned excellent results, reinforcing the Company's exploration bias towards oxide and free-milling material. The combination of high gold extraction, modest reagent consumption and rapid leach kinetics demonstrate that the oxide material is amenable to heap leaching, offering a typically lower cost alternative to conventional milling which is further enhanced by the relatively high oxide mineral resource grade of 1.4g/t Au1,5.

Highlights

  • Testwork demonstrates oxide material is amenable to heap leaching which typically offers a lower cost alternative to conventional milling

  • 87.2% gold extraction achieved for oxide composite sample in column leach testwork2

  • Rapid leach kinetics with 80% gold extraction after a 9-day column residence time

  • Low to moderate sodium-cyanide consumption of 0.2-0.3kg/t expected for field operations3

  • Oxide material readily forms a stable pellet when agglomerated with cement

  • Very low column slump and high solution percolation rates indicate potential for the 10kg/t cement dosage rate used for the agglomeration testwork to be significantly reduced in field operations

  • Oxide component of the Inferred Mineral Resource at South Houndé Project contains 298 koz of gold1,5

  • Exploration work, biased towards free-milling and high-grade targets, continues at the South Houndé Project which currently hosts an Inferred Mineral Resource of 1.50Moz contained gold4

1. 6.82 Mt @ 1.4 g/t Au for 298 koz reported above 0.4 g/t Au cut-off
2. Composite samples control crushed to -25mm and agglomerated with 10kg/t cement addition prior to leaching by solution with a strength of 0.04-0.05% (w/v) NaCN in a 2m high, 200mm diameter column for a total of 40 days
3. Based on column testwork and empirical observations Kappes, Cassiday & Associates Australia Pty Ltd conclude that actual NaCN consumption in commercial gold heap leaching facilities is approximately 25-40% of that measured in column testwork
4. 29.13 Mt @ 1.6 g/t Au for 1.50Moz reported above 0.8 g/t Au cut-off

Preliminary Metallurgical Testwork for Oxide Heap Leaching

Preliminary metallurgical testwork to assess the amenability of oxide mineralisation to processing by heap leaching has been completed by ALS Metallurgy Pty Ltd under the supervision of Kappes, Cassiday & Associates Australia Pty Ltd ("KCAA").  The testwork is regarded as preliminary and as such, parameters and flowsheets are un-optimised.  Notes outlining the testwork approach and detailed results are presented in Appendix A.

An oxide composite sample, grading 1.60g/t Au and weighing approximately 240kg, was generated from weathered quartz-feldspar-porphyry hosted mineralisation in 6 individual diamond drill half-core samples sourced from within the mineral resource.  The constituent holes were selected so as to provide reasonable representivity across the MM Prospect which hosts the majority of the mineral resources at the South Houndé Project.

Column Leach Testwork

A 65kg sub-sample of -25mm sized oxide composite was agglomerated using a cement dosage rate of 10kg/t to form stable pellets prior to column leach testing with a diluted sodium-cyanide (NaCN) solution for a duration of 40 days.  The column leach test is an industry-standard method used to provide an indication of leaching performance in a scaled-up heap leach in the field.

The testwork yielded a final gold extraction of 87.2% which is very encouraging, particularly when coupled with the rapid leach kinetics which saw an extraction level of 80% achieved in only 9 days (refer Figure 1).  Based on the column testwork, KCAA advise a gold extraction of approximately 85% could potentially be achieved in scaled-up field operations, subject to good agglomeration and stacking practices being adopted.

Reagent consumption was measured to be low to moderate for the oxide material.  The testwork determined a NaCN consumption of 0.79kg/t over the entire test period, however based on KCAA's empirical observations, this lab-based consumption is expected to translate to a consumption of in the range of 0.2-0.3kg/t NaCN for a scaled-up heap leach operation.

Percolation and slumpage tests conducted on the column after the leaching phase determined that the pellets and column were very stable.  Indications are that the 10kg/t cement dosage rate selected for the test could be significantly reduced, whilst still maintaining stable pellet and heap conditions to promote good hydraulic conductivity within the heap.

Figure 1 - Gold Leach Kinetics

Sarama's President and CEO, Andrew Dinning, commented:

"The column test leach results correlate well with our earlier intermittent bottle roll tests and we are very pleased with the high gold extraction of 87.2% that was achieved.  With our relatively high oxide grade, good indicated gold recoveries and modest reagent consumptions, we view heap leaching as a simple and cost effective alternative for the treatment of oxide mineralisation at the South Houndé Project.

Sarama is continuing its exploration efforts at the South Houndé Project and we are particularly keen to add to the 298koz1,5 gold contained in the oxide portion of the Inferred Mineral Resource and to attain a critical mass for the mineral resource base.  Whilst we are maintaining a bias towards oxide material, we are also focused on identifying more free-milling and high-grade targets."

For further information on the Company's activities, please contact:
Andrew Dinning or Paul Schmiede 
e: [email protected]
t: +61 (0) 8 9363 7600

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

About Sarama Resources Ltd

Sarama Resources Ltd (TSX-V: SWA) is a West African focused gold explorer with substantial landholdings in Burkina Faso, Liberia and Mali.

Sarama's flagship properties are situated within the Company's South Houndé Project area in south-west Burkina Faso. Located within the prolific Houndé greenstone belt, Sarama's exploration programs have built on significant early success to deliver a maiden Inferred Mineral Resource estimate of 1.5 Moz gold4,5. Outside of Burkina Faso, Sarama is focused on consolidating a number of under-explored landholdings in other emerging and established mining jurisdictions.

Incorporated in 2010, the Company's Board and management team have a proven track record in Africa and a strong history in the discovery and development of large-scale gold deposits.  Sarama is well positioned to build on its current success with a strong financial position and a sound exploration strategy across its property portfolio.

      5.   The effective date of the Company's Mineral Resource estimate is September 16, 2013. For further information regarding the Mineral Resource estimate please refer to the technical report titled "NI 43-101 Independent Technical Report, South Houndé Project, Bougouriba and Ioba Provinces, Burkina Faso", dated October 28, 2013. The technical report is available under the Company's profile on SEDAR at www.sedar.com.

Caution Regarding Forward Looking Statements

Information in this news release that is not a statement of historical fact constitutes forward-looking information.  Such forward-looking information includes statements regarding the Company's potential development plans for South Houndé Project using an oxide heap leach operation and expectations that this would provide a low operating and capital cost development, future exploration program and the Mineral Resource estimate.  Actual results, performance or achievements of the Company may vary from the results suggested by such forward-looking statements due to known and unknown risks, uncertainties and other factors. Such factors include, among others, that the business of exploration for gold and other precious minerals involves a high degree of risk and is highly speculative in nature; Mineral Resources are not Mineral Reserves, they do not have demonstrated economic viability, and there is no certainty that they can be upgraded to Mineral Reserves through continued exploration; few properties that are explored are ultimately developed into producing mines; geological factors; the actual results of current and future exploration; changes in project parameters as plans continue to be evaluated, as well as those factors disclosed in the Company's publicly filed documents.

There can be no assurance that any mineralisation that is discovered will be proven to be economic, or that future required regulatory licensing or approvals will be obtained. However, the Company believes that the assumptions and expectations reflected in the forward-looking information are reasonable. Assumptions have been made regarding, among other things, the Company's ability to carry on its exploration activities, the sufficiency of funding, the timely receipt of required approvals, the price of gold and other precious metals, that the Company will not be affected by adverse political events, the ability of the Company to operate in a safe, efficient and effective manner and the ability of the Company to obtain further financing as and when required and on reasonable terms. Readers should not place undue reliance on forward-looking information.

Sarama does not undertake to update any forward-looking information, except as required by applicable laws.

Qualified Person's Statement

Scientific or technical information in this news release that relates to metallurgical testwork and mineral processing for oxide mineralisation is based on information compiled or approved by Randall PyperRandall Pyper is an employee of Kappes, Cassiday & Associates Australia Pty Ltd and is considered to be independent of Sarama Resources Ltd. Randall Pyper has verified the data underlying the information in this news release pertaining to the metallurgical testwork completed on the Company's behalf.  The verification was conducted by Randall Pyper through a review of relevant lab results provided directly by the engaged laboratory. Randall Pyper is a Fellow in good standing of the Australasian Institute of Mining and Metallurgy and has sufficient experience which is relevant to the commodity, style of mineralisation under consideration and activity which he is undertaking to qualify as a Qualified Person under National Instrument 43-101.  Randall Pyper consents to the inclusion in this news release of the information, in the form and context in which it appears.

Scientific or technical information in this news release that relates to the preparation of the Company's mineral resource estimate is based on information compiled or approved by Adrian ShepherdAdrian Shepherd is an employee of Cube Consulting Pty Ltd and is considered to be independent of Sarama Resources Ltd.  Adrian Shepherd is a chartered professional member in good standing of the Australasian Institute of Mining and Metallurgy and has sufficient experience which is relevant to the commodity, style of mineralisation under consideration and activity which he is undertaking to qualify as a Qualified Person under National Instrument 43-101.  Adrian Shepherd consents to the inclusion in this news release of the information, in the form and context in which it appears.

Appendix A - Preliminary Heap Leach Metallurgical Testwork

 

 

 

 

SOURCE Sarama Resources Limited

More Stories By PR Newswire

Copyright © 2007 PR Newswire. All rights reserved. Republication or redistribution of PRNewswire content is expressly prohibited without the prior written consent of PRNewswire. PRNewswire shall not be liable for any errors or delays in the content, or for any actions taken in reliance thereon.

Latest Stories
Between the mockups and specs produced by analysts, and resulting applications built by developers, there exists a gulf where projects fail, costs spiral, and applications disappoint. Methodologies like Agile attempt to address this with intensified communication, with partial success but many limitations. In his session at 18th Cloud Expo, Charles Kendrick, CTO & Chief Architect at Isomorphic Software, will present a revolutionary model enabled by new technologies. Learn how business and devel...
SYS-CON Events announced today that Peak 10, Inc., a national IT infrastructure and cloud services provider, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. Peak 10 provides reliable, tailored data center and network services, cloud and managed services. Its solutions are designed to scale and adapt to customers’ changing business needs, enabling them to lower costs, improve performance and focus inter...
You think you know what’s in your data. But do you? Most organizations are now aware of the business intelligence represented by their data. Data science stands to take this to a level you never thought of – literally. The techniques of data science, when used with the capabilities of Big Data technologies, can make connections you had not yet imagined, helping you discover new insights and ask new questions of your data. In his session at @ThingsExpo, Sarbjit Sarkaria, data science team lead ...
So, you bought into the current machine learning craze and went on to collect millions/billions of records from this promising new data source. Now, what do you do with them? Too often, the abundance of data quickly turns into an abundance of problems. How do you extract that "magic essence" from your data without falling into the common pitfalls? In her session at @ThingsExpo, Natalia Ponomareva, Software Engineer at Google, will provide tips on how to be successful in large scale machine lear...
If there is anything we have learned by now, is that every business paves their own unique path for releasing software- every pipeline, implementation and practices are a bit different, and DevOps comes in all shapes and sizes. Software delivery practices are often comprised of set of several complementing (or even competing) methodologies – such as leveraging Agile, DevOps and even a mix of ITIL, to create the combination that’s most suitable for your organization and that maximize your busines...
Struggling to keep up with increasing application demand? Learn how Platform as a Service (PaaS) can streamline application development processes and make resource management easy.
In his session at @ThingsExpo, Chris Klein, CEO and Co-founder of Rachio, will discuss next generation communities that are using IoT to create more sustainable, intelligent communities. One example is Sterling Ranch, a 10,000 home development that – with the help of Siemens – will integrate IoT technology into the community to provide residents with energy and water savings as well as intelligent security. Everything from stop lights to sprinkler systems to building infrastructures will run ef...
Whether your IoT service is connecting cars, homes, appliances, wearable, cameras or other devices, one question hangs in the balance – how do you actually make money from this service? The ability to turn your IoT service into profit requires the ability to create a monetization strategy that is flexible, scalable and working for you in real-time. It must be a transparent, smoothly implemented strategy that all stakeholders – from customers to the board – will be able to understand and comprehe...
In the world of DevOps there are ‘known good practices’ – aka ‘patterns’ – and ‘known bad practices’ – aka ‘anti-patterns.' Many of these patterns and anti-patterns have been developed from real world experience, especially by the early adopters of DevOps theory; but many are more feasible in theory than in practice, especially for more recent entrants to the DevOps scene. In this power panel at @DevOpsSummit at 18th Cloud Expo, moderated by DevOps Conference Chair Andi Mann, panelists will dis...
See storage differently! Storage performance problems have only gotten worse and harder to solve as applications have become largely virtualized and moved to a cloud-based infrastructure. Storage performance in a virtualized environment is not just about IOPS, it is about how well that potential performance is guaranteed to individual VMs for these apps as the number of VMs keep going up real time. In his session at 18th Cloud Expo, Dhiraj Sehgal, in product and marketing at Tintri, will discu...
Machine Learning helps make complex systems more efficient. By applying advanced Machine Learning techniques such as Cognitive Fingerprinting, wind project operators can utilize these tools to learn from collected data, detect regular patterns, and optimize their own operations. In his session at 18th Cloud Expo, Stuart Gillen, Director of Business Development at SparkCognition, will discuss how research has demonstrated the value of Machine Learning in delivering next generation analytics to im...
Unless you don’t use the internet, don’t live in California, or haven’t been paying attention to the recent news… you should be aware that self-driving cars are on their way to becoming a reality. I have seen them – they are real. If you believe in the future reality of self-driving cars, then continue reading on. If you don’t believe in the future possibilities, then I am not sure what to do to convince you other than discuss the very real changes that will roll out with the consumer producti...
Up until last year, enterprises that were looking into cloud services usually undertook a long-term pilot with one of the large cloud providers, running test and dev workloads in the cloud. With cloud’s transition to mainstream adoption in 2015, and with enterprises migrating more and more workloads into the cloud and in between public and private environments, the single-provider approach must be revisited. In his session at 18th Cloud Expo, Yoav Mor, multi-cloud solution evangelist at Cloudy...
There is an ever-growing explosion of new devices that are connected to the Internet using “cloud” solutions. This rapid growth is creating a massive new demand for efficient access to data. And it’s not just about connecting to that data anymore. This new demand is bringing new issues and challenges and it is important for companies to scale for the coming growth. And with that scaling comes the need for greater security, gathering and data analysis, storage, connectivity and, of course, the...
This is not a small hotel event. It is also not a big vendor party where politicians and entertainers are more important than real content. This is Cloud Expo, the world's longest-running conference and exhibition focused on Cloud Computing and all that it entails. If you want serious presentations and valuable insight about Cloud Computing for three straight days, then register now for Cloud Expo.