Welcome!

News Feed Item

Atacama Pacific Announces Continued Positive Metallurgical Results From Cerro Maricunga Oxide Gold Project

TORONTO, ONTARIO -- (Marketwired) -- 06/09/14 -- Atacama Pacific Gold Corporation (TSX VENTURE: ATM) ("Atacama Pacific") is pleased to report the results from six column percolation leach tests completed on gold mineralization from its Cerro Maricunga oxide gold deposit located in northern Chile. The tests were undertaken to compare the gold recoveries from mineralization crushed to different sizes and to examine the impact of crushing using high pressure grind rolls ("HPGR") on recoveries. The test work also examined the impact of reducing the amount of lime used to control leach solution pH.

Table 1 summarizes the results of the column tests. Highlights from the current test work include:

--  Only a minor decrease in gold recoveries was observed when increasing
    crush size to 105 mm.
--  HPGR crushed mineralization did not achieved significantly higher gold
    recoveries compared to conventionally crushed material.
--  Majority of leachable gold was extracted in the first twenty days at
    crush sizes less than 21 mm.

Table 1 - Summary of Column Test Results, Cerro Maricunga Deposit
----------------------------------------------------------------------------
Test    Head     Gold Crush             Lime +
#      Grade Recovery  Size  NaCN(1) Cement(2)  Note
      ----------------------------------------
        (g/t         (P80 =
         Au)      (%)   mm)   (kg/t)    (kg/t)
----------------------------------------------------------------------------
68801A  0.33       72 105.0     0.96       1.0  Conventionally crushed
----------------------------------------------------------------------------
68801B  0.33       74  21.0     1.96       1.8  Conventionally crushed
----------------------------------------------------------------------------
68811   0.44       83   7.6     2.42       2.0  Conventionally crushed
----------------------------------------------------------------------------
68815   0.44       84   7.2     2.10       1.9  HPGR
----------------------------------------------------------------------------
68813   0.58       86   6.4     2.47       1.8  HPGR
----------------------------------------------------------------------------
68814   0.58       84   6.9     2.24       1.8  HPGR, fines processed
                                                separately
----------------------------------------------------------------------------
1. Reduced levels of lime resulted in a tripling of NaCN consumption due to
 the loss of solution pH control
2. Totals include 1 kg of cement

The current testing examined the impact of reducing the initial amount of lime added to the columns, which has a direct impact on leach solution pH and NaCN consumption. The solution pH of the current tests averaged between 9.0 and 9.5 resulting in significantly higher than previously determined NaCN consumption. The solution pH of all previous columns had been maintained between 10 and 11 establishing heap leach NaCN consumption in the order of 0.24 kg/t.

Test Results

As confirmed by column tests 68801A and 68801B, coarser crushed mineralization achieved slightly lower gold recoveries (72% at a 105 mm crush versus 74% at a 21 mm crush) similar to earlier column test results. Previous testing undertaken on mineralization crushed to 19 mm achieved gold recoveries of 78 to 89% compared to recoveries of 76 to 80% from mineralization crushed between 50 and 150 mm.

Three tests were completed on material crushed with HPGR following up on a HPGR-related column test announced on May 9, 2013 which attained a gold recovery of 85%. The current tests achieved gold recoveries varying from 84% to 86%. Two columns, completed on the same sample material, examined the impact of HPGR and conventional crushing with the HPGR test (68815) achieving 84% recoveries and the conventional test achieving 83% recoveries. There appears to be no significant benefit to using HPGR crushing.

Metallurgical Test Details

The column tests, conducted by Kappes, Cassidy and Associates, Reno, Nevada, were run 84 days. Table 2 summarizes the test details. Column slump, the difference between the initial sample height in a column compared to the height after test completion, was low. The initial leach solution for each column test contained 1.0 g NaCN/l and an on-flow solution NaCN concentration of 0.6 g/l was maintained during the test period.

Table 2 - Column Test Details
----------------------------------------------------------------------------
Test        Head       Gold    Test   Crush     Dry  Initial   Final  Column
#          Grade   Recovery  Period    Size  Weight   Height  Height   Slump

                                      (P80=
        (g/t Au)        (%)    days     mm)      kg        m       m       %
----------------------------------------------------------------------------
68801A      0.33         72      84   105.0     699     3.09    3.07     0.6
----------------------------------------------------------------------------
68801B      0.33         74      84    21.0      49     2.02    2.00     0.9
----------------------------------------------------------------------------
68811       0.44         83      84     7.6      49     1.77    1.73     1.8
----------------------------------------------------------------------------
68815       0.44         84      84     7.2      55     1.93    1.90     2.0
----------------------------------------------------------------------------
68813       0.58         86      84     6.4      55     1.91    1.88     2.0
----------------------------------------------------------------------------
68814       0.58         84      84     6.9      55     1.91    1.87     1.3
----------------------------------------------------------------------------

Prefeasibility Update

The Cerro Maricunga prefeasibility study is progressing well. The mineral processing and the majority of the mining plans have been completed and Atacama Pacific is waiting for supplier quotes for fleet equipment and some infrastructural items. All quotes are expected prior to the end of June and the PFS should be available for release in early July 2014.

Share Issuance

As announced on May 15, 2014, Atacama Pacific entered into an agreement with Hydro Exploraciones SpA under which it agreed to issue 350,000 common shares at a price of $1.15 per share to settle all obligations under two water exploration agreements. These agreements are related to water concessions located 70 km to the east of the Cerro Maricunga and subject to a water exploration joint venture agreement with Exeter Resources Corporation. These shares were issued on June 6, 2014 following approval of the transaction by the TSX Venture Exchange. The hold period on these shares will expire on October 7, 2014.

About Atacama Pacific Gold Corporation

Atacama Pacific's primary mineral property is the Cerro Maricunga oxide-associated, breccia-hosted gold project, located in Region III, 140 kilometres by road northeast of the city of Copiapo. In Atacama Pacific's January 2013 PEA envisions a large open pit operation mining 80,000 tonne per day with a conventional heap leach processing facility producing 2.7 million ounces of gold over a 10 year mine life with cash costs of US$652 per ounce. On January 28, 2014, Atacama Pacific announced an updated pit confined resource estimate of 3.47 million ounces of gold (248.8 million tonnes grading 0.43 g/t gold) in the measured and indicated category with a further 0.043 million ounces (3.1 million tonnes grading 0.43 g/t gold) in the inferred category. The resource estimate was based upon a cut-off grade of 0.18 g/t gold.

National Instrument 43-101

As defined by Section 1.5 of National Instrument 43-101 ("NI 43-101") of the Canadian Securities Administrators, the Qualified Person for the Cerro Maricunga Property is Sergio Diaz, a resident of Santiago, Chile and a registered member of the "Comision Calificadora de Competencias en Recursos y Reservas Mineras" (Chilean Mining Commission, registry n degrees 051), an accepted foreign association as defined by NI 43-101 (Appendix A). Mr. Diaz has reviewed the contents of this press release.

The Cerro Maricunga resource estimate was prepared under CIM Definition Standards (2005). Dr. Eduardo Magri, a mining engineer (University of Witwatersrand) and a Fellow of the Southern African Institute of Mining and Metallurgy with over 30 years of industry experience, is the Independent Qualified Person for the resource estimate.

FORWARD-LOOKING STATEMENTS

This news release contains forward-looking statements, including predictions, projections and forecasts. Forward-looking statements include, but are not limited to, statements with respect to the PEA, including the potential total gold production of 2.7 million ounces over a 10.1 year mine life, initial life of mine estimated operating cash costs of US$652/oz Au, preliminary initial capital cost estimate of US$514.6 million with sustaining capital of US$249.0 million, pre-tax pay-back period of 2.5 years at US$1,450/oz Au and 1.7 years at US$1,700/oz Au, pre-tax NPV of $741 million at US$1,450/oz Au and a 5% discount rate After-tax NPV5% of US$531 million, pre-tax NPV5% of US$1,247 million and an after-tax NPV5% of US$923 million at US$1,700/oz Au, pre-tax IRR) of 33.9% at US$1,450/oz Au (after-tax IRR of 26.6%), statements regarding the expectation to increase mineral resources, statements regarding expectations for receipt of permits and environmental approvals, exploration results (including with respect to water resources), the success of exploration activities generally, mine development prospects, and potential future gold production. Often, but not always, forward-looking statements can be identified by the use of words such as "plans", "planning", "expects" or "does not expect", "continues", "scheduled", "estimates", "forecasts", "intends", "potential", "anticipates", "does not anticipate", or "belief", or describes a "goal", or variation of such words and phrases or state that certain actions, events or results "may", "could", "would", "might" or "will" be taken, occur or be achieved.

Forward-looking statements involve known and unknown risks, future events, conditions, uncertainties and other factors which may cause the actual results, performance or achievements to be materially different from any future results, prediction, projection, forecast, performance or achievements expressed or implied by the forward-looking statements. Such factors include, among others, the results of due diligence activities, changes in economic parameters and assumptions, the interpretation and actual results of current exploration activities; changes in project parameters as plans continue to be refined; the results of regulatory and permitting processes; future prices of gold; possible variations in grade or recovery rates; failure of equipment or processes to operate as anticipated; labour disputes and other risks of the mining industry; the results of further economic and technical studies, delays in obtaining governmental approvals or financing or in the completion of exploration, as well as those factors disclosed in Atacama Pacific's publicly filed documents.

Although Atacama Pacific has attempted to identify important factors that could cause actual actions, events or results to differ materially from those described in forward-looking statements, there may be other factors that cause actions, events or results not to be as anticipated, estimated or intended. There can be no assurance that forward-looking statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements.

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.

Contacts:
Atacama Pacific Gold Corporation
Carl B. Hansen
President and CEO
416 861 8267
416 861 9116 (FAX)
[email protected]
www.atacamapacific.com

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
DX World EXPO, LLC, a Lighthouse Point, Florida-based startup trade show producer and the creator of "DXWorldEXPO® - Digital Transformation Conference & Expo" has announced its executive management team. The team is headed by Levent Selamoglu, who has been named CEO. "Now is the time for a truly global DX event, to bring together the leading minds from the technology world in a conversation about Digital Transformation," he said in making the announcement.
"Space Monkey by Vivent Smart Home is a product that is a distributed cloud-based edge storage network. Vivent Smart Home, our parent company, is a smart home provider that places a lot of hard drives across homes in North America," explained JT Olds, Director of Engineering, and Brandon Crowfeather, Product Manager, at Vivint Smart Home, in this SYS-CON.tv interview at @ThingsExpo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
SYS-CON Events announced today that Conference Guru has been named “Media Sponsor” of the 22nd International Cloud Expo, which will take place on June 5-7, 2018, at the Javits Center in New York, NY. A valuable conference experience generates new contacts, sales leads, potential strategic partners and potential investors; helps gather competitive intelligence and even provides inspiration for new products and services. Conference Guru works with conference organizers to pass great deals to gre...
DevOps is under attack because developers don’t want to mess with infrastructure. They will happily own their code into production, but want to use platforms instead of raw automation. That’s changing the landscape that we understand as DevOps with both architecture concepts (CloudNative) and process redefinition (SRE). Rob Hirschfeld’s recent work in Kubernetes operations has led to the conclusion that containers and related platforms have changed the way we should be thinking about DevOps and...
The Internet of Things will challenge the status quo of how IT and development organizations operate. Or will it? Certainly the fog layer of IoT requires special insights about data ontology, security and transactional integrity. But the developmental challenges are the same: People, Process and Platform. In his session at @ThingsExpo, Craig Sproule, CEO of Metavine, demonstrated how to move beyond today's coding paradigm and shared the must-have mindsets for removing complexity from the develop...
In his Opening Keynote at 21st Cloud Expo, John Considine, General Manager of IBM Cloud Infrastructure, led attendees through the exciting evolution of the cloud. He looked at this major disruption from the perspective of technology, business models, and what this means for enterprises of all sizes. John Considine is General Manager of Cloud Infrastructure Services at IBM. In that role he is responsible for leading IBM’s public cloud infrastructure including strategy, development, and offering m...
The next XaaS is CICDaaS. Why? Because CICD saves developers a huge amount of time. CD is an especially great option for projects that require multiple and frequent contributions to be integrated. But… securing CICD best practices is an emerging, essential, yet little understood practice for DevOps teams and their Cloud Service Providers. The only way to get CICD to work in a highly secure environment takes collaboration, patience and persistence. Building CICD in the cloud requires rigorous ar...
Companies are harnessing data in ways we once associated with science fiction. Analysts have access to a plethora of visualization and reporting tools, but considering the vast amount of data businesses collect and limitations of CPUs, end users are forced to design their structures and systems with limitations. Until now. As the cloud toolkit to analyze data has evolved, GPUs have stepped in to massively parallel SQL, visualization and machine learning.
"Evatronix provides design services to companies that need to integrate the IoT technology in their products but they don't necessarily have the expertise, knowledge and design team to do so," explained Adam Morawiec, VP of Business Development at Evatronix, in this SYS-CON.tv interview at @ThingsExpo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
To get the most out of their data, successful companies are not focusing on queries and data lakes, they are actively integrating analytics into their operations with a data-first application development approach. Real-time adjustments to improve revenues, reduce costs, or mitigate risk rely on applications that minimize latency on a variety of data sources. In his session at @BigDataExpo, Jack Norris, Senior Vice President, Data and Applications at MapR Technologies, reviewed best practices to ...
Widespread fragmentation is stalling the growth of the IIoT and making it difficult for partners to work together. The number of software platforms, apps, hardware and connectivity standards is creating paralysis among businesses that are afraid of being locked into a solution. EdgeX Foundry is unifying the community around a common IoT edge framework and an ecosystem of interoperable components.
"ZeroStack is a startup in Silicon Valley. We're solving a very interesting problem around bringing public cloud convenience with private cloud control for enterprises and mid-size companies," explained Kamesh Pemmaraju, VP of Product Management at ZeroStack, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
Large industrial manufacturing organizations are adopting the agile principles of cloud software companies. The industrial manufacturing development process has not scaled over time. Now that design CAD teams are geographically distributed, centralizing their work is key. With large multi-gigabyte projects, outdated tools have stifled industrial team agility, time-to-market milestones, and impacted P&L stakeholders.
"Akvelon is a software development company and we also provide consultancy services to folks who are looking to scale or accelerate their engineering roadmaps," explained Jeremiah Mothersell, Marketing Manager at Akvelon, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
Enterprises are adopting Kubernetes to accelerate the development and the delivery of cloud-native applications. However, sharing a Kubernetes cluster between members of the same team can be challenging. And, sharing clusters across multiple teams is even harder. Kubernetes offers several constructs to help implement segmentation and isolation. However, these primitives can be complex to understand and apply. As a result, it’s becoming common for enterprises to end up with several clusters. Thi...