Pulacayo Project Feasibility Study - Apogee Silver

Pulacayo 1 000 t/d Phase I Feasibility Study - NI 43-101 Technical Report
090644-3-0000-20-IFI-100
12 DATA VERIFICATION
12.1 Review and Validation of Project Data Sets
Core sample records, lithologic logs, laboratory reports and associated drill hole information
for all drill programs completed by Apogee and ASC were digitally compiled by Apogee staff
and made available to Mercator for resource estimation purposes. Information pertaining to
the exploration history in the property area was also provided by Apogee and was reviewed
to assess consistency and validity of Apogee results.
Digital drill hole records supplied by Apogee were checked against original hard copy source
documents during both project site visits by Mercator to assess consistency and accuracy of
such records. Parameters reviewed in detail include collar coordinates, down hole survey
values, hole depths, and lithocodes. This was followed by review and validation of
approximately 10% of the compiled core sample dataset against original source documents.
Review of logging and sample records showed consistently good agreement between original
records and digital database values.
Micon noted in the Pressacco et al. (2010) Pulacayo Preliminary Economic Assessment
(PEA) that minor inconsistencies were in some instances present between digital project
datasets and original source documents reviewed at the field site. More specifically,
disagreement was noted in drill hole coordinates between original and digital datasets for
such parameters as hole survey data, core recovery information on paper logs, incomplete
digital representation of specific gravity analysis in the project database, and paper logs not
having original sample documents appended. Apogee staff followed up on associated
recommendations laid out by Micon and now prepare a summary file at the field site for each
drill hole that contains updated drill collar coordinates, complete down hole survey results,
graphical and tabulated quick logs, geological logs, updated cross sections, original sample
records, summary assay results, specific gravity analyses and core recoveries. Examples of
these summary drill hole files were reviewed by Mercator.
After completion of all manual record checking procedures, the drilling and sampling
database records were further assessed through digital error identification methods available
through the Gemcom-Surpac Version 6.2.1® software. This provided a check on items such
as sample record duplications, end of hole errors, survey and collar file inconsistencies and
some potential lithocode file errors. The digital review and import of the manually checked
datasets through Surpac provided a validated Microsoft Access® database that Mercator
considers to be acceptable with respect to support of the resource estimation program
described in this report.
12.2 Site Visits by Mercator
12.2.1 03 August to 10 August 2011
Author and qualified person Peter Webster and Mercator resource geologist Matthew
Harrington carried out a site visit to the Pulacayo deposit during the period of 03 August to 10
August 2011. At that time, they completed a review of all Apogee drill program components,
including discussion of protocols for lithologic logging plus storage, handling, sampling and
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