VANCOUVER, BRITISH COLUMBIA -- (Marketwire) -- 03/28/13 -- Mariana Resources Limited (AIM: MARL) has released its audited annual financial statements and annual report for the year ended 31 December 2012. The following document may be obtained by clicking on the link below or via the Company's website:
1. Annual Report to shareholders which includes the audited financial statements.
(i) Gold equivalent (AuEq) grade has been calculated by dividing silver assays by 60 and adding to the gold value and this assumes 100% recovery.
Exploration information in this announcement has been compiled by John Horsburgh who is a Fellow of the Australasian Institute of Mining and Metallurgy. Mr Horsburgh has sufficient experience relevant to the style of mineralisation and types of gold and base metal deposits under consideration and to the activity that he is undertaking to qualify as a Competent Person as defined in the JORC Code. Mr Horsburgh is a qualified person within the meaning of National Instrument 43-101, Canada.
Quality Assurance/Quality Control
All technical information for the Company's Peru projects is obtained and reported under a quality assurance and quality control (QA/QC) program. All samples are collected under the supervision of the Company geologists and dispatched via commercial transport to ALS Chemex Laboratories in Lima, Peru for sample preparation and analytical procedures. Samples are fire assayed with AAS finish on a 50 g assay charge. Additionally, all samples are analyzed by a 35 element aqua regia ICP-AES method plus trace mercury detection by cold vapour-AAS methods. ALS Chemex's quality control system complies with International Standards ISO 9001:2008 and ISO 17025. Analytical accuracy and precision are monitored by the analysis of reagent blanks, reference material and replicate samples. As part of Mariana's Quality Control and Quality Assurance program, certified reference materials, field duplicates and blank samples are inserted continuously into the sample stream
All technical information for the Company's Argentina projects is obtained and reported under a quality assurance and quality control (QA/QC) program. All samples are collected under the supervision of the Company geologists and dispatched via commercial transport to ALS Chemex laboratories in Mendoza, Argentina, and assayed in Santiago de Chile. ALS Chemex's quality system complies with the requirements for the International Standards ISO 9001:2000 and ISO 17025: 1999. Samples returning greater than 10 g/t gold and/or greater than 100 g/t silver are assayed using gravimetric analyses. Systematic assaying of sample duplicates and commercially prepared standards and blanks is performed for analytical reliability.
For further information please visit website at www.marianaresources.com.
About Mariana Resources
Mariana Resources Ltd is an AIM quoted exploration and development company with an extensive portfolio of gold, silver and copper projects in South America. In Peru, Mariana has an option to earn a 51% interest in highly prospective copper-gold and copper-silver porphyry targets in the Cordillera del Condor of northern Peru.
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