Alpha HPA : Company Activities Update

(Criteria in this section apply to all succeeding sections.)

Sampling	• Nature and quality of sampling (eg cut channels, random chips, or specific specialised	• Samples of high purity alumina were taken as ~20g splits of
techniques	industry standard measurement tools appropriate to the minerals under investigation, such		homogonised, crystalline powder
	as down hole gamma sondes, or handheld XRF instruments, etc). These examples should
	not be taken as 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	• Drill type (eg core, reverse circulation, open-hole hammer, rotary air blast, auger, Bangka,	•	Not Applicable. The samples were generated from a
techniques	sonic, etc) and details (eg core diameter, triple or standard tube, depth of diamond tails,		feedstock of industrial chemicals.
	face-sampling bit or other type, whether core is oriented and if so, by what method, etc).
Drill sample	• Method of recording and assessing core and chip sample recoveries and results assessed.	•	Not Applicable
recovery	• 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 geologically and geotechnically logged to a level	•	Not Applicable
	of detail to support appropriate Mineral 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	• If core, whether cut or sawn and whether quarter, half or all core taken.	• Samples were presented as a homogonised, crystalline
techniques and	• If non-core, whether riffled, tube sampled, rotary split, etc and whether sampled wet or dry.		aluminium salt generated from a crystallisation and centrifuge
Sample	• For all sample types, the nature, quality and appropriateness of the sample preparation		process
Preparation	technique.
	• Quality control procedures adopted for all sub-sampling stages to maximise representivity of
	samples.
	• Measures taken to ensure that the sampling 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	• The nature, quality and appropriateness of the assaying and laboratory procedures used	• The purity analysis of the high-purity alumina (HPA) pre-cursor
assay data and	and whether the technique is considered partial or total.		was determined by dissolution of ~7g of pre-cursor in 16% HCl
laboratory tests	• For geophysical tools, spectrometers, handheld XRF instruments, etc, the parameters used		and analysis by ALS Brisbane using ICP-MS. HPA pre-cursor
	in determining the analysis including instrument make and model, reading times, calibrations		assays are converted to indicative HPA assays using the
	factors applied and their derivation, etc.		process mass balance.
	• 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	• The verification of significant intersections by either independent or alternative company	•	Not Applicable
sampling and	personnel.
assaying	• 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	• Accuracy and quality of surveys used to locate drill holes (collar and down-hole surveys),	•	Not Applicable
data points	trenches, mine workings and other locations used in Mineral Resource estimation.
	• Specification of the grid system used.
	• Quality and adequacy of topographic control.
Data spacing	• Data spacing for reporting of Exploration Results.	•	Not Applicable
and distribution	• 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.
	• Whether sample compositing has been applied.
Orientation of	• Whether the orientation of sampling achieves unbiased sampling of possible structures and	•	Not Applicable
data in relation	the extent to which this is known, considering the deposit type.
to geological	• If the relationship between the drilling orientation and the orientation of key mineralised
structure	structures is considered to have introduced a sampling bias, this should be assessed and
	reported if material.
Sample	• The measures taken to ensure sample security.	• Duplicates of all samples submitted were retained at the
security			Company's Brisbane laboratories to insure against any sample

		loss
Audits or	• The results of any audits or reviews of sampling techniques and data.	• Not applicable
reviews

(Criteria listed in the preceding section also apply to this section.)

Mineral	• Type, reference name/number, location and ownership including agreements or material	•	Not Applicable
tenement and	issues with third parties such as joint ventures, partnerships, overriding royalties, native title
land tenure	interests, historical sites, wilderness or national park and environmental settings.
status	• 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.
Exploration	• Acknowledgment and appraisal of exploration by other parties.	•	Not Applicable
done by other
parties
Geology	• Deposit type, geological setting and style of mineralisation.	•	Not Applicable
Drill hole	• A summary of all information material to the understanding of the exploration results	•	Not Applicable
Information	including a tabulation of the following information for all Material drill holes:
	o easting and northing of the drill hole collar
	o elevation or RL (Reduced Level - elevation above sea level in metres) of the drill hole
	collar
	o dip and azimuth of the hole
	o down hole length and interception depth
	o hole length.
	• 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.
Data	• In reporting Exploration Results, weighting averaging techniques, maximum and/or minimum	•	Not Applicable
aggregation	grade truncations (eg cutting of high grades) and cut-off grades are usually Material and
methods	should be stated.
	• 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.
	• The assumptions used for any reporting of metal equivalent values should be clearly stated.

Relationship	•	These relationships are particularly important in the reporting of Exploration Results.	•	Not Applicable
between	•	If the geometry of the mineralisation with respect to the drill hole angle is known, its nature
mineralisation		should be reported.
widths and	•	If it is not known and only the down hole lengths are reported, there should be a clear
intercept		statement to this effect (eg 'down hole length, true width not known').
lengths
Diagrams	•	Appropriate maps and sections (with scales) and tabulations of intercepts should be	•	Not Applicable
		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.
Balanced	•	Where comprehensive reporting of all Exploration Results is not practicable, representative	•	Not Applicable
reporting		reporting of both low and high grades and/or widths should be practiced to avoid misleading
		reporting of Exploration Results.
Other	•	Other exploration data, if meaningful and material, should be reported including (but not	•	Not Applicable
substantive		limited to): geological observations; geophysical survey results; geochemical survey results;
exploration		bulk samples - size and method of treatment; metallurgical test results; bulk density,
data		groundwater, geotechnical and rock characteristics; potential deleterious or contaminating
		substances.
Further work	•	The nature and scale of planned further work (eg tests for lateral extensions or depth	• From July-December 2019 the Company completed pilot plant
		extensions or large-scalestep-out drilling).		operations validating the process flow sheet on a semi-
	•	Diagrams clearly highlighting the areas of possible extensions, including the main geological		continuous, end-to-end basis
		interpretations and future drilling areas, provided this information is not commercially	• Minor additional testwork is planned during CY2020 to refine
		sensitive.		the process flow sheet