Troy Resources : 20220620 Barrick Earn-In Quarterly Report

TROY RESOURCES ASX ANNOUNCEMENT

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Guyana Karouni Section 1: Sampling Techniques and Data

Criteria

JORC Code Explanation

Commentary

Sampling Technique

Nature and quality of sampling (eg cut

Material produced during AC drilling is collected at 1 m intervals and

channels, random chips, or specific

samples are composited at nominal 4 m intervals for analysis. Samples

specialized

industry

standard

are broken

based on logged geology (at

key horizons within the

measurement

tools

appropriate to

the

weathering

profile). This sample spacing

ensures a representative

minerals

under

investigation,

such as

sample weight is collected at a scale sufficient to define geological and

downhole gamma sondes, or handheld

mineralisation boundaries.

XRF instruments, etc). These examples

use

should not be taken as limiting the broad

The use of a nominal 4m sample interval was selected after

meaning of sampling

consideration of the following:

Include reference to measures taken to

• The AC drilling method and sample collection process for previous

Barrick drill campaigns on other projects.

ensure samples are representative and

• A representative sample weight suitable for transport, laboratory

the

appropriate

calibration

of

any

preparation and analysis.

measurement

tools

or

systems used.

• The lithological thickness of geologic units encountered.

Aspects

of

the

determination

of

• Anticipated mineralisation zone thickness ranging from several metres

mineralisation

that are

Material to

the

to tens of metres.

Public Report.

• Suitability for statistical analysis. A standard sample length ensures all

In cases where 'industry standard' work

assay results are treated on equal support when reviewing assay

statistics (before sample compositing for geostatistical analysis).

has

been

done

this

would

be

relatively

personal

simple (eg 'reverse circulation drilling was

Surface samples (rock chips) are collected from approximately 2m

used to obtain 1 m samples from which 3

profile; in transported cover (sand, clay) recovery averages 39%. In

assessed.

kg was

pulverized

to

produce a

50 g

beneath the natural surface and weigh approximately 2-3kg. Where

charge

for fire assay'). In

other cases,

appropriate (based on the feature of interest), exposures are channel

more explanation may be required, such

sampled to ensure representivity.

as where there is coarse gold that has

QA/QC procedures are completed as per industry best practice

inherent

sampling

problems.

Unusual

(certified standards and blanks, inserted at a rate of 1 blank and 1

commodities

or mineralisation types (eg

standard every 20 samples).

submarine

nodules)

may

warrant

disclosure of detailed information.

Drilling

Drill

type

(eg

core,

reverse circulation,

Air Core "AC" drilling within the prospect area employs RC blade and

open- hole hammer, rotary air blast, auger,

hammer drilling techniques with minimum 4.0-inch diameter tooling.

Bangka, sonic, etc) and details (eg core

Hole depths range from 30m to 150m (average 80 m).

diameter, triple or standard tube, depth of

diamond tails, face- sampling bit or other

Air Core Rig supplied and operated by Major Drilling Guyana Inc.

type, whether core is oriented and if so, by

what method, etc).

Sample material is collected in 6m runs.

Drill sample

Method of recording and assessing core

AC recoveries are visually estimated and recorded in the database.

recovery

and chip sample recoveries and results

Recoveries vary and tend to improve with depth in the weathering

For

Measures taken to maximize sample

residual regolith and fresh rock recovery averages 62% and %,

recovery and ensure representative nature

respectively. A geologist is always present at the rig to monitor and

of the samples.

record recovery.

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

Logging of AC samples includes observations regarding regolith profile,

been

geologically

and

geotechnical

lithology, mineralogy, mineralisation, structure, weathering, alteration,

logged to a level of detail to support

colour and other features of the samples. Chips are photographed and

appropriate Mineral Resource estimation,

stored in plastic chip trays. Bulk reference samples are placed in

mining studies and metallurgical studies.

labelled plastic bags and stored for reference and detailed re-assay as

Whether logging is qualitative or

needed.

quantitative

in

nature.

Core

(or

costean/Trench,

channel,

etc)

Surface exposures in drainages are sampled and mapped. Mapping

photography. The total length and

observations include interpreted lithology, mineralogy, mineralization,

percentage of the relevant intersections

structure, degree of weathering, and colour.

logged.

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