Arrow Minerals : New Gold Targets Identified Vranso Project, Burkina Faso

Criteria

JORC Code explanation

Commentary

Sampling techniques

• Nature and quality of sampling (eg cut

• Samples are collected from a maximum depth of

channels, random chips, or specific

30cm below surface avoiding organic material and

specialised industry standard measurement

obvious surface contamination.

tools appropriate to the minerals under

• Sample size ranges between 500g and 1kg of

investigation, such as down hole gamma

material passing through a 1mm sieve.

sondes, or handheld XRF instruments, etc).

• Material is packaged into a MINSAM type paper

These examples should not be taken as

sample bag

limiting the broad meaning of sampling.

• Include reference to measures taken to

ensure sample representivity and the

appropriate calibration of any measurement

tools or systems used.

• Aspects of the determination of

mineralisation that are Material to the Public

Report.

• In cases where 'industry standard' work has

been done this would be relatively simple

(eg 'reverse circulation drilling was used to

obtain 1 m samples from which 3 kg was

pulverised to produce a 30 g charge for fire

assay'). In other cases more explanation

may be required, such as where there is

coarse gold that has inherent sampling

problems. Unusual commodities or

mineralisation types (eg submarine nodules)

may warrant disclosure of detailed

information.

Drilling techniques

• Drill type (eg core, reverse circulation, open-

•

N/A

hole hammer, rotary air blast, auger,

Bangka, sonic, etc) and details (eg core

diameter, triple or standard tube, depth of

diamond tails, face-sampling bit or other

type, whether core is oriented and if so, by

what method, etc).

Drill sample recovery

• Method of recording and assessing core and

•

N/A

chip sample recoveries and results

assessed.

• Measures taken to maximise sample

recovery and ensure representative nature

of the samples.

• Whether a relationship exists between

sample recovery and grade and whether

sample bias may have occurred due to

preferential loss/gain of fine/coarse material.

Logging

• Whether core and chip samples have been

• Description of sample (soil type, regime,

geologically and geotechnically logged to a

landscape, colour, Geology, Slope direction, is

level of detail to support appropriate Mineral

recorded

Resource estimation, mining studies and

metallurgical studies.

• Whether logging is qualitative or quantitative

in nature. Core (or costean, channel, etc)

photography.

• The total length and percentage of the

relevant intersections logged.

Sub-sampling techniques

• If core, whether cut or sawn and whether

• All material is collected from the recorded depth

and sample preparation

quarter, half or all core taken.

and mixed prior to sieving.

• If non-core, whether riffled, tube sampled,

rotary split, etc and whether sampled wet or

Criteria

JORC Code explanation

Commentary

is representative of the in situ material

collected, including for instance results for

field duplicate/second-half sampling.

• Whether sample sizes are appropriate to the

grain size of the material being sampled.

Quality of assay data and

• The nature, quality and appropriateness of

• Duplicate samples are collected every20th site.

laboratory tests

the assaying and laboratory procedures

used and whether the technique is

considered partial or total.

• For geophysical tools, spectrometers,

handheld XRF instruments, etc, the

parameters used in determining the analysis

including instrument make and model,

reading times, calibrations factors applied

and their derivation, etc.

• Nature of quality control procedures adopted

(eg standards, blanks, duplicates, external

laboratory checks) and whether acceptable

levels of accuracy (ie lack of bias) and

precision have been established.

Verification of sampling

• The verification of significant intersections by

• N/A

and assaying

either independent or alternative company

personnel.

• The use of twinned holes.

• Documentation of primary data, data entry

procedures, data verification, data storage

(physical and electronic) protocols.

• Discuss any adjustment to assay data.

Location of data points

• Accuracy and quality of surveys used to

• Sample Site positions for the soil sampling

locate drill holes (collar and down-hole

program were located with handheld GPS (+/- 2m)

surveys), trenches, mine workings and other

• Coordinates are reported in this document using

locations used in Mineral Resource

WGS84 Zone 30N.

estimation.

• Topographic control is either mm scale accuracy

• Specification of the grid system used.

through survey, or established using handheld

• Quality and adequacy of topographic control.

GPS (+/- 2m)

Data spacing and

• Data spacing for reporting of Exploration

• Data reported represents single point data.

distribution

Results.

• No Mineral Resource and Ore Reserve estimation

• Whether the data spacing and distribution is

procedure(s) and classifications applied.

sufficient to establish the degree of

• No sample compositing applied.

geological and grade continuity appropriate

for the Mineral Resource and Ore Reserve

estimation procedure(s) and classifications

applied.

• Whether sample compositing has been

applied.

Orientation of data in

• Whether the orientation of sampling

• Single point data, orientation in relation to

relation to geological

achieves unbiased sampling of possible

geological structure(s) unknown.

structure

structures and the extent to which this is

known, considering the deposit type.

• 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.

Sample security

• The measures taken to ensure sample

• Samples secured in single sample bag then zip

security.

locked into large rice bags and dispatched via

courier to ALS laboratory in Ouagadougou at

which point the laboratory takes control as part of

chain of custody.

• Historical pulps were securely stored at the Perkoa

Mine site and transported by vehicle directly to the

BUMIGEB laboratory at which point the chain of

custody is transferred to the laboratory.

Audits or reviews

• The results of any audits or reviews of

• None conducted as is considered unwarranted at

sampling techniques and data.

this early stage.