Click here to close now.




















Welcome!

Microsoft Cloud Authors: Elizabeth White, Adine Deford, the Editor, Michael Krems, Xenia von Wedel

News Feed Item

Seafield Reports Updated Metallurgical Results and High Gold Recovery Rates at Miraflores, Colombia

TORONTO, ONTARIO -- (Marketwire) -- 02/15/13 -- Seafield Resources Ltd. ("Seafield" or "the Company") (TSX VENTURE:SFF) is pleased to report preliminary metallurgical test results of an extensive metallurgical development program for its gold-silver Miraflores Deposit, Quinchia, Colombia, presently underway at Inspectorate Exploration and Mining Services Ltd. ("Inspectorate"), located in Richmond, BC, Canada. This study program was designed and is being supervised by SRK Consulting in Denver ("SRK") on behalf of Seafield.

Highlights:


--  All test composite samples evaluated were highly amenable to gold
    recovery by a process flow sheet using conventional gravity
    concentration followed by gold flotation from the gravity tailings; 

--  All test composite samples, ground to a nominal P80 of 106mm, contained
    significant amounts of coarse gold amenable to gravity concentration.
    Gold recoveries of 52 to 65% were obtained in gravity cleaner
    concentrates containing between 382 - 1,271 g/t Au; 

--  Gravity concentration followed by gold rougher flotation from gravity
    tailings resulted in gold recoveries ranging from 94 to 98%; 

--  The next phase of the metallurgical program will investigate process
    parameters required to cyanide leach the gold contained in the flotation
    concentrates. 

"We are delighted to confirm the high gold recovery rates for all major geo-metallurgical units in the Miraflores deposit and are confident these materials can be treated efficiently by the flow sheets evaluated with the present metallurgical development program," commented Dave Prins, Seafield's Chief Operating Officer. "As this study advances, the results obtained will provide the data required for the design of a potential commercial processing facility."

Sample Characterization

Three composite samples were prepared from multiple quarter-core drill hole samples representing the major geo-metallurgical units in the mineable areas of the deposit. Based on the mining plans developed in our earlier PEA study (see press release dated, April 23, 2012) two mining operations, an open pit and an underground mine were designed. In the open pit mine, the major geo-metallurgical units were determined to be White and Green breccias with a minor contribution of Red and Grey breccias and Basalt. In the underground mine the major geo-metallurgical unit are the White breccias, with minor amounts of Green breccias. The minor geo-metallurgical units are not included in the master composite samples and will be used only for process variability studies.

For the purposes of this study, the major geo-metallurgical units of both open pit and underground mines were studied in detail. Considering that the Miraflores deposit is essentially a large mineralized breccia containing multiple high-grade veins, the samples selected to be part of the master composites consisted of long mineralized quarter core intervals of varying grades, which included vein intervals.

To prepare the composites for the open pit mine, the drill holes and intervals selected crossed the proposed minable material blocks from the PEA mining plan. Similarly, for the underground mine, the drill holes and intervals selected were within the material blocks that could be mined as indicated by the PEA mining plan.

Table 1 below, shows the characterization of these sample composites.


                                                                            
----------------------------------------------------------------------------
----------------------------------------------------------------------------
               TABLE 1. Characterization of Composite Samples               
----------------------------------------------------------------------------
----------------------------------------------------------------------------
                 MATERIAL            # of                                   
MINE                 TYPE     Drill holes     WEIGHT        AVERAGE GRADE   
                                         -----------------------------------
                                         -----------------------------------
                                                               Au,       Ag,
                                                      Kg      g/mt      g/mt
----------------------------------------------------------------------------
----------------------------------------------------------------------------
UNDERGROUND      White Bx              11            408   1.71(1)       1.5
----------------------------------------------------------------------------
----------------------------------------------------------------------------
OPEN PIT         White Bx               9            516   0.75(2)       3.7
             ---------------------------------------------------------------
             ---------------------------------------------------------------
                 Green Bx              10            572   1.64(2)       6.9
----------------------------------------------------------------------------
----------------------------------------------------------------------------
                                                                            
----------------------------------------------------------------------------
----------------------------------------------------------------------------
Source: Inspectorate                                                        
(1)Average of triplicate splits (3 assays)                                  
(2)Average of duplicate assay of triplicate splits (6 assays)               

Metallurgical Test Results

Initial test work was conducted on the three composite samples representing the major geo-metallurgical units at a target P80 grind of 74 microns. After gravity separation, the gravity tails were subjected to rougher gold flotation using different reagent schemes. Once optimum process parameters for flotation were established, tests were conducted to evaluate gold recovery versus grind size for each master composite.

Table 2 shows the effect of grind size on gold recovery for the major geo-metallurgical units. An economic analysis will determine the optimum grind size.


                                                                            
----------------------------------------------------------------------------
----------------------------------------------------------------------------
               TABLE 2. Effect of Grind Size on Gold Recovery               
----------------------------------------------------------------------------
----------------------------------------------------------------------------
                     OPEN PIT                             UNDERGROUND       
----------------------------------------------------------------------------
----------------------------------------------------------------------------
      WHITE BRECCIA            GREEN BRECCIA             WHITE BRECCIA      
----------------------------------------------------------------------------
----------------------------------------------------------------------------
         P80          Au         P80            Au         P80            Au
     microns  Recovery %     microns    Recovery %     microns    Recovery %
----------------------------------------------------------------------------
----------------------------------------------------------------------------
                                                                            
186                   97         182          92.5         188          98.7
149                 89.7         145          94.4         164          98.6
125                 92.2         123          96.9         127          97.1
110                 98.8          99          94.1         104          98.5
74                  97.5          70            99          70            99
----------------------------------------------------------------------------
----------------------------------------------------------------------------

Work in Progress

Future work to be completed is outlined below, with the metallurgical test work program scheduled for completion in Q2 2013:


--  Completion of Master Composite Studies: 
    --  Mineralogical evaluations 
    --  Gravity concentration-rougher flotation-cleaner flotation studies 
    --  Locked-cycle flotation tests 
    --  Concentrate cyanide leaching 
    --  Cyanide detoxification studies 
    --  Sedimentation studies 
    --  Tailings geochemistry evaluation 

--  Comminution Testing (Master Composites and Variability Composites) 
    --  Bond ball mill work index 
    --  SAG Mill Comminution (SMC) tests 
    --  Abrasion work index 

--  Metallurgical testing on variability composites 

Seafield's Miraflores Deposit is situated in the Company's 100%-owned, 6,757-hectare, Quinchia Gold Project. Miraflores is a low sulphidation epithermal gold deposit located in Colombia's mineral-prolific Mid-Cauca gold belt. The mineralization is located in a hydrothermal breccia pipe with free gold associated with cement materials (the matrix) and high grade structures where gold is associated with zinc, lead, copper and iron. At surface, the breccia pipe has a drill-tested diameter of 250 metres by 280 metres. The breccia pipe widens and remains open at depth with a drill-tested vertical extent of 600 metres.

Review by Qualified Person

The results of the Company's metallurgical testing program presented in this news release have been reviewed and verified by Eric Olin, MSc, MBA, RM-SME, Principal Process Metallurgist of SRK in Denver, Colorado. Mr. Olin has over 30 years experience in the minerals industry with extensive consulting, plant operations, process development, project management and research & development experience with base metals, precious metals, ferrous metals and industrial minerals.

About Seafield Resources Ltd.

Seafield Resources Ltd. (TSX VENTURE:SFF) is a mineral exploration company currently focused on advancing its Miraflores Gold Deposit towards feasibility level. Seafield's 6,757-hectare Quinchia Gold Project is located in the Department of Risaralda of Colombia. SRK Consulting Inc's (Denver) Preliminary Economic Assessment on the Miraflores Deposit indicates robust economics with a pre-tax internal rate of return of 50% and a pre-tax net present value (8%) of $249M (see corporate PEA presentation at http://bit.ly/MFeL7q). Miraflores currently has a NI 43-101 compliant Measured and Indicated resource estimate of 1,925,542 ounces gold at 0.8 g/t Au (77Mt at a cut-off of 0.3 g/t Au) and an Inferred resource estimate of 103,043 ounces gold at 0.6 g/t Au (5.5Mt at a cut-off of 0.3 g/t Au). Additionally, the Company has a NI 43-101 compliant resource estimate for its Dosquebradas Deposit, also part of the Quinchia Gold Project, with an Inferred resource estimate totalling 920,772 ounces gold at 0.5 g/t Au (57Mt at a cut-off of 0.3 g/t Au). Seafield Resources Ltd. trades its shares on the Toronto Venture Exchange (TSX-V) under the symbol SFF and in the United States using CUSIP 81173R101. For more details on the Company, please visit www.sffresources.com.

Forward-Looking Statement

This news release includes certain "forward-looking statements" within the meaning of that phrase under Canadian securities laws. Without limitation, statements regarding potential mineralization and resources, exploration results, and future plans and objectives of the Company are forward looking statements that involve various degrees of risk. Forward-looking statements reflect management's current views with respect to possible future events and conditions and, by their nature, are based on management's beliefs and assumptions and subject to known and unknown risks and uncertainties, both general and specific to the Company. Although the Company believes the expectations expressed in such forward-looking statements are reasonable, such statements are not guarantees of future performance and actual results or developments may differ materially from those in our forward-looking statements. The following are important factors that could cause the Company's actual results to differ materially from those expressed or implied by such forward looking statements: changes in the world wide price of commodities, general market conditions, risks inherent in exploration, risks associated with development, construction and mining operations, the uncertainty of future profitability and the uncertainty of access to additional capital. Additional information regarding the material factors and assumptions that were applied in making these forward looking statements as well as the various risks and uncertainties we face are described in greater detail in the "Risk Factors" section of our annual and interim Management's Discussion and Analysis of our financial results and other continuous disclosure documents and financial statements we file with the Canadian securities regulatory authorities which are available at www.sedar.com. The Company undertakes no obligation to update this forward-looking information except as required by applicable law. The Company relies on litigation protection for forward-looking statements.

Neither 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.

@ThingsExpo Stories
As more and more data is generated from a variety of connected devices, the need to get insights from this data and predict future behavior and trends is increasingly essential for businesses. Real-time stream processing is needed in a variety of different industries such as Manufacturing, Oil and Gas, Automobile, Finance, Online Retail, Smart Grids, and Healthcare. Azure Stream Analytics is a fully managed distributed stream computation service that provides low latency, scalable processing of streaming data in the cloud with an enterprise grade SLA. It features built-in integration with Azur...
Akana has announced the availability of the new Akana Healthcare Solution. The API-driven solution helps healthcare organizations accelerate their transition to being secure, digitally interoperable businesses. It leverages the Health Level Seven International Fast Healthcare Interoperability Resources (HL7 FHIR) standard to enable broader business use of medical data. Akana developed the Healthcare Solution in response to healthcare businesses that want to increase electronic, multi-device access to health records while reducing operating costs and complying with government regulations.
SYS-CON Events announced today that the "Second Containers & Microservices Expo" will take place November 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Containers and microservices have become topics of intense interest throughout the cloud developer and enterprise IT communities.
SYS-CON Events announced today that Pythian, a global IT services company specializing in helping companies leverage disruptive technologies to optimize revenue-generating systems, has been named “Bronze Sponsor” of SYS-CON's 17th Cloud Expo, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Founded in 1997, Pythian is a global IT services company that helps companies compete by adopting disruptive technologies such as cloud, Big Data, advanced analytics, and DevOps to advance innovation and increase agility. Specializing in designing, imple...
WebRTC has had a real tough three or four years, and so have those working with it. Only a few short years ago, the development world were excited about WebRTC and proclaiming how awesome it was. You might have played with the technology a couple of years ago, only to find the extra infrastructure requirements were painful to implement and poorly documented. This probably left a bitter taste in your mouth, especially when things went wrong.
Through WebRTC, audio and video communications are being embedded more easily than ever into applications, helping carriers, enterprises and independent software vendors deliver greater functionality to their end users. With today’s business world increasingly focused on outcomes, users’ growing calls for ease of use, and businesses craving smarter, tighter integration, what’s the next step in delivering a richer, more immersive experience? That richer, more fully integrated experience comes about through a Communications Platform as a Service which allows for messaging, screen sharing, video...
Too often with compelling new technologies market participants become overly enamored with that attractiveness of the technology and neglect underlying business drivers. This tendency, what some call the “newest shiny object syndrome,” is understandable given that virtually all of us are heavily engaged in technology. But it is also mistaken. Without concrete business cases driving its deployment, IoT, like many other technologies before it, will fade into obscurity.
SYS-CON Events announced today that IceWarp will exhibit at the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. IceWarp, the leader of cloud and on-premise messaging, delivers secured email, chat, documents, conferencing and collaboration to today's mobile workforce, all in one unified interface
In his session at @ThingsExpo, Lee Williams, a producer of the first smartphones and tablets, will talk about how he is now applying his experience in mobile technology to the design and development of the next generation of Environmental and Sustainability Services at ETwater. He will explain how M2M controllers work through wirelessly connected remote controls; and specifically delve into a retrofit option that reverse-engineers control codes of existing conventional controller systems so they don't have to be replaced and are instantly converted to become smart, connected devices.
The Internet of Things is in the early stages of mainstream deployment but it promises to unlock value and rapidly transform how organizations manage, operationalize, and monetize their assets. IoT is a complex structure of hardware, sensors, applications, analytics and devices that need to be able to communicate geographically and across all functions. Once the data is collected from numerous endpoints, the challenge then becomes converting it into actionable insight.
With the proliferation of connected devices underpinning new Internet of Things systems, Brandon Schulz, Director of Luxoft IoT – Retail, will be looking at the transformation of the retail customer experience in brick and mortar stores in his session at @ThingsExpo. Questions he will address include: Will beacons drop to the wayside like QR codes, or be a proximity-based profit driver? How will the customer experience change in stores of all types when everything can be instrumented and analyzed? As an area of investment, how might a retail company move towards an innovation methodolo...
SYS-CON Events announced today that HPM Networks will exhibit at the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. For 20 years, HPM Networks has been integrating technology solutions that solve complex business challenges. HPM Networks has designed solutions for both SMB and enterprise customers throughout the San Francisco Bay Area.
Consumer IoT applications provide data about the user that just doesn’t exist in traditional PC or mobile web applications. This rich data, or “context,” enables the highly personalized consumer experiences that characterize many consumer IoT apps. This same data is also providing brands with unprecedented insight into how their connected products are being used, while, at the same time, powering highly targeted engagement and marketing opportunities. In his session at @ThingsExpo, Nathan Treloar, President and COO of Bebaio, will explore examples of brands transforming their businesses by t...
SYS-CON Events announced today that Micron Technology, Inc., a global leader in advanced semiconductor systems, will exhibit at the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Micron’s broad portfolio of high-performance memory technologies – including DRAM, NAND and NOR Flash – is the basis for solid state drives, modules, multichip packages and other system solutions. Backed by more than 35 years of technology leadership, Micron's memory solutions enable the world's most innovative computing, consumer,...
Contrary to mainstream media attention, the multiple possibilities of how consumer IoT will transform our everyday lives aren’t the only angle of this headline-gaining trend. There’s a huge opportunity for “industrial IoT” and “Smart Cities” to impact the world in the same capacity – especially during critical situations. For example, a community water dam that needs to release water can leverage embedded critical communications logic to alert the appropriate individuals, on the right device, as soon as they are needed to take action.
SYS-CON Events announced today the Containers & Microservices Bootcamp, being held November 3-4, 2015, in conjunction with 17th Cloud Expo, @ThingsExpo, and @DevOpsSummit at the Santa Clara Convention Center in Santa Clara, CA. This is your chance to get started with the latest technology in the industry. Combined with real-world scenarios and use cases, the Containers and Microservices Bootcamp, led by Janakiram MSV, a Microsoft Regional Director, will include presentations as well as hands-on demos and comprehensive walkthroughs.
As more intelligent IoT applications shift into gear, they’re merging into the ever-increasing traffic flow of the Internet. It won’t be long before we experience bottlenecks, as IoT traffic peaks during rush hours. Organizations that are unprepared will find themselves by the side of the road unable to cross back into the fast lane. As billions of new devices begin to communicate and exchange data – will your infrastructure be scalable enough to handle this new interconnected world?
While many app developers are comfortable building apps for the smartphone, there is a whole new world out there. In his session at @ThingsExpo, Narayan Sainaney, Co-founder and CTO of Mojio, will discuss how the business case for connected car apps is growing and, with open platform companies having already done the heavy lifting, there really is no barrier to entry.
With the Apple Watch making its way onto wrists all over the world, it’s only a matter of time before it becomes a staple in the workplace. In fact, Forrester reported that 68 percent of technology and business decision-makers characterize wearables as a top priority for 2015. Recognizing their business value early on, FinancialForce.com was the first to bring ERP to wearables, helping streamline communication across front and back office functions. In his session at @ThingsExpo, Kevin Roberts, GM of Platform at FinancialForce.com, will discuss the value of business applications on wearable ...
The Internet of Things (IoT) is about the digitization of physical assets including sensors, devices, machines, gateways, and the network. It creates possibilities for significant value creation and new revenue generating business models via data democratization and ubiquitous analytics across IoT networks. The explosion of data in all forms in IoT requires a more robust and broader lens in order to enable smarter timely actions and better outcomes. Business operations become the key driver of IoT applications and projects. Business operations, IT, and data scientists need advanced analytics t...