REG - Berkeley Energia - DFS confirms Salamanca as a low cost producer <Origin Href="QuoteRef">BKY.AX</Origin> - Part 4
14/07/2016 07:36
- Part 4: For the preceding part double click ID:nRSN1376Ec
affect magnetic based readings.JEN holes were
drilled on grid coordinates and were not surveyed after drilling.
Specification of the grid system used. The grid system is ETRS 1989 UTM Zone 29N.
Quality and adequacy of topographic control. Topographic control is based on a digital terrain model with sub metric accuracy sourced from the Spanish Geographical Institute (Instituto Geográfico Nacional) and is
verified through detailed drill hole collar surveys by a qualified surveyor using a DGPS.
Data spacing and distribution Data spacing for reporting of Exploration Results. The majority of the Berkeley drilling was undertaken on a notional 35m by 35m in the two first year open pit production inside Domain 6, 50m by 50m grid in the rest of
the Domain 6 and 100m by 100m in the other smaller domains, with section lines orientated approximately perpendicular to the interpreted strike of the mineralisation. The
historical JEN drilling was completed on a closer spaced 35m by 35m grid within the previous resource area.
Whether the data spacing and distribution is sufficient to establish the degree of geological and grade continuity appropriate for the Mineral Resource and Ore Reserve estimation procedure(s) and classifications applied. The data spacing (notionally 35m by 35m) is considered sufficient to assume geological and grade continuity, and allow the estimation of Measured Mineral Resources.
Whether sample compositing has been applied. No compositing of RC samples in the field has been undertaken.
Orientation of data in relation to geological structure Whether the orientation of sampling achieves unbiased sampling of possible structures and the extent to which this is known, considering the deposit type. The mineralised zone is a 2-3km scale fold structure with the dominant strike direction being NNE-SSW. Despite the general dip of the host geological units and structures
ranging from 50-80°, the mineralised zone is interpreted to be sub-horizontal to shallowly dipping due to the nature of the mineralisation processes.
If the relationship between the drilling orientation and the orientation of key mineralised structures is considered to have introduced a sampling bias, this should be assessed and reported if material. The majority of DD and RC drill holes are vertical. Due to the interpreted flat lying nature of the mineralisation, no sampling bias is considered to have been introduced
by the orientation of the drilling.
Sample security The measures taken to ensure sample security. Chain of custody is managed by Berkeley. Samples were transported from the drill site by Company vehicle to a sample preparation shed where samples are prepared for
dispatch. Samples are sent directly from the sample preparation shed to the laboratory using a certified courier or a Berkeley owned vehicle authorised for radioactive
materials transport. No other freight is transported with the samples which are taken directly from the Berkeley facility to the external laboratory. Sample submission
forms are sent in paper form with the samples as well as electronically to the laboratory. Reconciliation of samples occurs prior to commencement of sample preparation
for assaying.The historical drilling samples were prepared and analysed using internal company laboratories. The chain of custody is unknown.
Audits or reviews The results of any audits or reviews of sampling techniques and data. Sampling techniques and procedures, as well as QA/QC data, are reviewed internally an ongoing basis. Mr Malcolm Titley (Geology Consultant, Maja Mining Limited) has
independently reviewed the sampling techniques, procedures and data. He has undertaken a site visit to review and inspect the application of procedures. These reviews
have concluded that the sampling and analytical results have resulted in data suitable for incorporation into Mineral Resource estimation.
Audits or reviews
The results of any audits or reviews of sampling techniques and data.
Sampling techniques and procedures, as well as QA/QC data, are reviewed internally an ongoing basis. Mr Malcolm Titley
(Geology Consultant, Maja Mining Limited) has independently reviewed the sampling techniques, procedures and data. He has
undertaken a site visit to review and inspect the application of procedures. These reviews have concluded that the sampling
and analytical results have resulted in data suitable for incorporation into Mineral Resource estimation.
Section 2 Reporting of Exploration Results
(Criteria listed in the preceding section also apply to this section.)
Mineral tenement and land tenure status Type, reference name/number, location and ownership including agreements or material issues with third parties such as joint ventures, partnerships, overriding royalties, native title interests, historical sites, wilderness or national park and environmental settings. The Zona 7 Prospect lies on the Alisos Investigation Permit PI 6605-20 which is 100% owned by Minera de Río Alagón, a wholly
owned subsidiary of Berkeley Energia Limited. The Alisos Investigation Permit is currently in the first year of the third three
-year term which was granted on January 11th 2016.No historical sites, wilderness or national parks are located within the
Permit. The Zona 7 Prospect is located adjacent to the village of Villavieja de Yeltes.
The security of the tenure held at the time of reporting along with any known impediments to obtaining a licence to operate in the area. Tenure in the form of an Investigation Permit has been granted and is considered secure. There are no known impediments to
obtaining a licence to operate in this area.
Exploration done by other parties Acknowledgment and appraisal of exploration by other parties. Previous exploration at Zona 7 was completed initially by Junta de Energía Nuclear (JEN) and then Empresa Nacional de Uranio
S.A. (ENUSA), both Spanish state run companies, from the late 1950's through to the mid 1980's. Work completed by JEN and ENUSA
included mapping, radiometric surveys, trenching and diamond (DD) and open-hole (OH) drilling. A detailed data assessment and
verification of the historic data supplied by ENUSA has been undertaken. No significant issues with the data were detected.
Geology Deposit type, geological setting and style of mineralisation. The uranium mineralisation is hosted within Lower Cambrian metasediments adjacent to granite. The mineralisation typically
occurs as a sub-horizontal to shallowly dipping layer occurring between surface and 100m depth, although mineralisation has been
recorded to a maximum depth of 217m. The style of the uranium mineralisation includes veins, stockwork and disseminated
mineralisation in joint/fracture filling associated with brittle deformation. Uraninite and coffinite are the primary uranium
minerals. Secondary uranium mineralisation is developed in "supergene-like" tabular zones corresponding to the depth of
weathering. Most of the mineralisation is hosted within partially weathered and unweathered metasediment. This deposit falls
into the category defined by the International Atomic Energy Association (IAEA) as Vein Type, Sub Type Iberian Type.
Drill hole Information A summary of all information material to the understanding of the exploration results including a tabulation of the following information for all Material drill holes:o easting and northing of the drill hole collaro elevation or RL (Reduced Level - elevation above sea level in metres) of the drill hole collaro dip and azimuth of the holeo down hole length and interception deptho hole length. Details of all reported drill holes are provided in Appendix B of this release.
If the exclusion of this information is justified on the basis that the information is not Material and this exclusion does not detract from the understanding of the report, the Competent Person should clearly explain why this is the case. All of this information is Material and has been included in Appendix B of this release.
Data aggregation methods In reporting Exploration Results, weighting averaging techniques, maximum and/or minimum grade truncations (eg cutting of high grades) and cut-off grades are usually Material and should be stated. Reported drill intersections are based on chemical assay data and are calculated using a 200ppm U3O8 cut-off, no high grade cut,
and may include up to 2m of internal dilution.
Where aggregate intercepts incorporate short lengths of high grade results and longer lengths of low grade results, the procedure used for such aggregation should be stated and some typical examples of such aggregations should be shown in detail. High grade intervals that are internal to broader zones of uranium mineralisation are reported as included intervals.
The assumptions used for any reporting of metal equivalent values should be clearly stated. No metal equivalent values are used.
Relationship between mineralisation widths and intercept lengths These relationships are particularly important in the reporting of Exploration Results. If the geometry of the mineralisation with respect to the drill hole angle is known, its nature should be reported. All drilling was planned in such a way as to intersect expected mineralisation in a perpendicular manner. The uranium
mineralisation is interpreted to be flat lying to shallowly dipping so the majority of the RC holes have been drilled
vertically. The reported down-hole intervals are therefore interpreted to approximate true widths.
If it is not known and only the down hole lengths are reported, there should be a clear statement to this effect (eg 'down hole length, true width not known'). The reported down-hole intervals are interpreted to approximate true widths.
Diagrams Appropriate maps and sections (with scales) and tabulations of intercepts should be included for any significant discovery being reported These should include, but not be limited to a plan view of drill hole collar locations and appropriate sectional views. Appropriate diagrams, including a drill plan and cross sections, are included in the main body of this release.
Balanced reporting Where comprehensive reporting of all Exploration Results is not practicable, representative reporting of both low and high grades and/or widths should be practiced to avoid misleading reporting of Exploration Results. All results are reported in Appendix B of this release.
Other substantive exploration data Other exploration data, if meaningful and material, should be reported including (but not limited to): geological observations; geophysical survey results; geochemical survey results; bulk samples - size and method of treatment; metallurgical test results; bulk density, groundwater, geotechnical and rock characteristics; potential deleterious or contaminating substances. Down-hole gamma logging of all holes is undertaken to provide eU3O8 data. Prior comparisons of eU3O8 data with chemical assay
data have shown that on average eU3O8 tends to underestimate at higher grades (>600ppm) and overestimate at lower grades
(<100ppm). Accordingly, the eU3O8 data is not considered of sufficient quality to replace chemical assay data for the purposes
of reporting drilling results. The Mineral Resources reported in this release are estimated using chemical assay data as the
primary method for grade estimation in the resource modelling process and eU3O8 data is only used where there were no assay data
available.
Further work The nature and scale of planned further work (eg tests for lateral extensions or depth extensions or large-scale step-out drilling). Further work planned for the Zona 7 Prospect includes infill drilling that would be focused on improving geological confidence
and resource classification.The mineralisation remains open along strike and on deep, with both areas to be targeted in
subsequent drilling campaignsGeological studies will include detailed interpretation of lithology, structure and weathering and
an assessment of potential relationships between these factors and uranium grade distribution. Further work is also planned on a
number of other exploration targets within the Retortillo Region.
Diagrams clearly highlighting the areas of possible extensions, including the main geological interpretations and future drilling areas, provided this information is not commercially sensitive. These are shown in the main body of this release.
These are shown in the main body of this release.
Section 3 Estimation and Reporting of Mineral Resources
(Criteria listed in the preceding section also apply to this section.)
Database integrity Measures taken to ensure that data has not been corrupted by, for example, transcription or keying errors, between its initial collection and its use for Mineral Resource estimation purposes. Drill hole data is stored in a password protected relational database (Access). Drill data recorded in a spreadsheet is transferred to the database by the project
geologist who is responsible for reviewing and validating the data. Assay data is received from the external laboratories in digital format and is loaded directly into
the database.Geological logging is restricted to appropriate codes relevant to the local geology, mineralisation, weathering and alteration setting. A copy of the master
database is linked to Surpac mining software for Mineral Resource Estimation (MRE).
Data validation procedures used. Database validation checks including collar survey position, down hole survey control, assay limits, e-grade profiles, sample intervals and logging codes are completed
prior to the data being transferred to the master database.
Site visits Comment on any site visits undertaken by the Competent Person and the outcome of those visits. Sampling techniques and procedures, as well as QA/QC data, are reviewed internally an ongoing basis. Malcolm Titley, (CP, Geology Consultant, Maja Mining Limited) has
reviewed the sampling techniques, procedures, data and resource estimation methodology. He has undertaken a number of site visits, the most recent being in August 2015,
to review and inspect the application of these procedures. He concludes that the sampling and analytical results available are appropriate for estimation of the Mineral
Resource.
If no site visits have been undertaken indicate why this is the case. Site visits have been undertaken.
Geological interpretation Confidence in (or conversely, the uncertainty of) the geological interpretation of the mineral deposit. The confidence of the geological interpretation is appropriate for the current level of resource estimation. The resource is defined within mineralised envelopes which
encompass all zones of significant mineralisation.
Nature of the data used and of any assumptions made. Geology and mineralisation interpretation is based on geological logging and sample assays derived from RC and DD drilling, along with cross sectional interpretations
which include surface mapping information and geophysical studies.
The effect, if any, of alternative interpretations on Mineral Resource estimation. Structural studies show dips of structures vary between 50° and 80° however; the uranium mineralisation has undergone supergene remobilisation in the first 5-10m and is
interpreted to be flat lying to shallowly dipping and generally within 100m from surface.
The use of geology in guiding and controlling Mineral Resource estimation. On the deposit scale the uranium grade is controlled by both lithology and structure, while on a local scale the grade is interpreted to be more influenced by structure.
The factors affecting continuity both of grade and geology. Geological logging and uranium assay of samples from drill holes has demonstrated the continuity of the grade and lithology between mineralised sections. Breaks in
continuity are likely due to structural offsets, some of which have been observed or interpreted from surface mapping.
Dimensions The extent and variability of the Mineral Resource expressed as length (along strike or otherwise), plan width, and depth below surface to the upper and lower limits of the Mineral Resource.
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