ST GEORGE MINING LIMITED — Regulatory Filings 2019

Oct 3, 2019

ASX / MEDIA RELEASE

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4 October 2019

DEEP DRILLING CONFIRMS CONTINUITY OF MINERALISED ULTRAMAFICS DOWN-PLUNGE ON CATHEDRALS BELT

- Maiden Deep Drilling Along the Cathedrals Belt Confirms Potential for More Nickel Copper Sulphides at Depth:

• Drill hole MAD160 was completed as a deep stratigraphic hole at the Investigators Prospect and intersected a 20m thick mafic-ultramafic unit from 248m downhole including disseminated and blebby sulphides in a 9m interval from 259m downhole

• The mineralised interval consists of between 1-5% sulphides comprising pentlandite (pn), chalcopyrite (cp) and pyrrhotite (po) – laboratory assays are pending and will confirm the metal content of the mineralised interval

• MAD160 confirms a thickening of the mineralised ultramafic in the north-northwest downdip direction, and supports the potential for additional nickel-copper sulphide deposits at depth

• MAD160 is one of four deep holes completed at the Cathedrals Belt in the current drill programme, with all four drill holes having intersected prospective ultramafic units downplunge of known nickel-copper sulphide mineralisation

• Down-hole electromagnetic (DHEM) surveys are planned for all deep holes to search for mineralisation around the hole, including below the hole

Growth-focused Western Australian nickel company St George Mining Limited (ASX: SGQ ) (“ St George ” or “ the Company ”) is pleased to announce significant drill results at its flagship Mt Alexander Project, located in the north-eastern Goldfields.

MAD160 is the latest deep drill hole completed at the Cathedrals Belt and intersected a 20m thick mineralised mafic-ultramafic at 248m downhole. The mineralised interval is 100m down-plunge of the closest known high-grade mineralisation – representing a significant extension to the strike of mineralisation down-plunge.

John Prineas, St George Mining’s Executive Chairman, said:

“High-grade nickel-copper sulphides at shallow depths have already been identified by drilling at the Investigators, Stricklands, Cathedrals and Radar Prospects. The east-west strike of this mineralisation extends for 5.5km on the Cathedrals Belt with another 10.5km of the Cathedrals Belt remaining underexplored and prospective for further deposits of mineralisation.

“The significant east-west strike of high-grade mineralisation along the Cathedrals Belt is indicative of a large mineral system which is also likely to have a significant depth extension.

“It is pleasing to see the results of MAD160 fitting perfectly to this geological model and confirming the continuation of the mineralised ultramafic at depth.

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ASX / MEDIA RELEASE

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“With limited drilling at depth, the latest drill results are very encouraging for the potential to discover more mineralisation in the north-northwest down-dip direction of the mineralised ultramafic units.”

The mineral system at the Cathedrals Belt is interpreted to be an intrusive system with the maficultramafic intrusions that host nickel-copper sulphides having passed upwards from the Earth’s mantle through major east-west orientated faults located in the northern section of the Cathedrals Belt.

Four deep stratigraphic drill holes have been completed in the current drill programme – two at the Investigators Prospect and one each at the Stricklands and Cathedrals Prospects. All four were designed to test for the continuation of the mineralised ultramafic towards the north and at depth – being downplunge of the high-grade mineralisation already established at these Prospects.

All four drill holes intersected the intrusive mafic-ultramafic in positions consistent with the interpreted down-dip extension of those units.

These results are very encouraging and additional deep drill holes will be planned to further test for mineralisation at depth. DHEM surveys will be completed in all four drill holes shortly to investigate for potential mineralisation around the holes and to assist in designing follow-up drill holes.

Figure 1 is an orthographic view of the ultramafic at Investigators, which is interpreted to dip towards the north-northwest at 30 to 40 degrees, and highlights the mineralisation intersected by drilling to date including the down-plunge mineralisation intersected by MAD160.

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Figure 1 – 3D orthographic view (looking south-east) of the Investigators ultramafic showing drill holes and known massive nickel-copper sulphide mineralisation. The surface image is the SAMSON EM data showing the large EM anomaly at Investigators. The latest drill results, including MAD160, confirm that mineralisation is open down-plunge.

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MAD160 at Investigators:

MAD160 was completed to a downhole depth of 300m at Investigators. The hole was designed to test for a continuation at depth and down plunge of the mineralised ultramafic intersected by MAD157 and MAD158.

Both of these holes encountered significant thicknesses of nickel-copper mineralisation, including massive sulphide in MAD157 with assays pending; see our ASX Release dated 23 September 2019 ’Thick NickelCopper Sulphide Intercepts Extend Continuation of Investigators Mineralisation’ .

MAD160 successfully intersected the targeted mafic-ultramafic unit with a thick 20m intercept from 248m downhole including a 9m interval with sulphide mineralisation as follows:

MAD160	Style of Mineralisation
Interval
248.14m to 259.2m	Mafic(upper portion of intrusive) – no sulphides observed
259.2m to	Ultramafic with disseminated and blebby sulphides increasing with depth(1-5%
268m	sulphides comprising py, cp and po)

MAD159 at Investigators:

MAD159 was completed at Investigators East to a downhole depth of 300m.

The hole was drilled to the south, and designed to test for a continuation at depth of the mineralised ultramafic intersected by MAD112 (3.55m @ 4.67% Ni, 2.27% Cu, 0.2% Co and 2.94g/t total PGEs).

MAD159 intersected a thin, fault-bound ultramafic from 154.9m to 155.5m downhole, suggesting a structural ‘pinch out’ of the main intrusive unit which is known to be thicker along strike. No sulphides were observed.

MAD154 at Stricklands:

MAD154 was completed at Stricklands to downhole depth of 450m. The hole was drilled towards the south-east and underneath the known shallow mineralisation of MAD71 at Stricklands ( 17.45m @ 3.01%Ni, 1.31%Cu, 0.13%Co and 1.68g/t total PGEs from 37.45m ).

MAD154 intersected several thick mafic and ultramafic units with sulphide mineralisation as follows:

MAD154	Style of Mineralisation
Interval
28.4m to	Mafic with rare sulphides and extensive quartz/chlorite/epidote veining(5-10%
41.3m	sulphides comprising py andpo)
41.9m to	Foliated Ultramafic with quartz/chlorite/epidote vein hosted disseminated sulphides
58m	(10% sulphides comprising py, cp andpo)
81.56m to	Mafic with quartz/chlorite/epidote vein hosted disseminated sulphides(5-10%
101.5m	_sulphides comprising py, cp, po) _
135.55m to 141m	Ultramafic with disseminated sulphides(10% sulphides comprising py and po)

MAD153 at Cathedrals:

MAD153 was completed at the Cathedrals Prospect to 450m downhole and drilled towards the southsoutheast. The hole was designed to test for structural repititions in the area underneath the shallow highgrade nickel-copper sulphide mineralisation at the Cathedrals Prospect.

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ASX / MEDIA RELEASE

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MAD153 intersected three ultramafic sequences – between 128m to 130.3m, 246.08m to 247.8m and 319.3m to 320.8m, which confirms the continuation of the prospective units. Rare sulphides were observed within the ultramafic.

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Figure 2 – plan view map of the Cathedrals Belt (set against SAM data) highlighting the four deep drill holes recently completed.

The confirmation of intrusive mafic-ultramafic units at depth is very positive for the potential of further nickel-copper sulphides down-plunge from known high-grade mineralsation. Additional deep drilling is planned with another deep drill hole at Investigators currently underway.

DRILL PROGRAMME CONTINUES Table 1 contains details of the completed drill holes for the current drill programme at Mt Alexander.

Diamond drilling is continuing with MAD161 currently in progress at Investigators. This is another deep stratigraphic hole planned to a depth of 350m and designed to test for further mineralisation in the downplunge area.

RC (reverse circulation) drilling has paused while we await arrival of a more powerful RC drill rig to complete a number of deep RC holes.

Radar Prospect:

Earthworks have been completed for the drill pads required for the follow-up drilling of the MAD152 discovery hole at Radar – see our ASX Release dated 2 September 2019 ‘ New Discovery of Nickel-Copper Sulphides’ .

Drilling at Radar is scheduled to commence shortly.

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ASX / MEDIA RELEASE

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Bullets Prospect:

Earthworks have also been completed at Bullets for the inaugral drilling of EM conductors at this target area. Drilling at Bullets will be prioritised after drilling is completed at Radar.

Fish Hook Prospect:

The Programme of Works required to commence drilling at Fish Hook has been approved by the Department of Mines, Industry Regulation and Safety.

Assays for the recently completed soil survey are expected within the next two weeks, following which an EM survey and/or drilling will be progressed at Fish Hook.

West End Prospect:

The crew for the moving loop EM (MLEM) survey planned for West End is due to return to site shortly. They will complete the MLEM survey towards the Ida Fault in the western section of the Cathedrals Belt.

Drill targets at West End will be finalised once the results of the MLEM survey are reviewed.

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Figure 3 – map of the Mt Alexander tenements (against RTP 1VD magnetic data) with key prospects on the Cathedrals Belt highlighted. New targets generated at Bullets and Fish Hook have yet to be drilled and have the potential to significantly extend the strike of mineralisation along the 16km Cathedrals Belt.

Based on the intersection angle of the drilling with the modelled ultramafic unit, downhole widths are interpreted to be close to true widths.

Nickel and copper values shown above for recently completed drill holes are based on portable XRF analysis. They are preliminary in nature and a conclusive determination of the nickel, copper, cobalt and PGE values of the sulphide mineralisation will be confirmed when laboratory assays are available.

Average XRF readings in the massive sulphide interval are based on at least four readings per metre (unless otherwise stated) and are not length and density weighted.

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ASX / MEDIA RELEASE

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Metal content for intervals of disseminated sulphides are not accurately determined by portable XRF analysis and estimates for this style of mineralisation are based on geological logging.

Hole ID	Prospect	East	North	RL	Depth	Azimuth	Dip	Target
MAD144	Investigators	231010	6806499	419	230	165	-71	EM plate 82,000 siemens
MAD145	Investigators	231650	6806569	424.6	230	196	-77	EM plate 20,000 siemens
MAD146	Investigators	231377	6806531	422.8	220	170	-75	EM plate 34,000 siemens
MAD147	Investigators	231299	6806305	422	150.8	353	-75	EM plate 30,000 siemens
MAD148	Investigators	231234	6806400	421	210.9	358	-80	EM plate 28,000 siemens
MAD149	Investigators	231219	6806454	421	240.6	28	-68	EM Plate 20,000 siemens
MAD150	Investigators	231170	6806452	421	217	201	-78	EM Plate 15,000 siemens
MAD151	Fairbridge	233270	6807080	423	330.5	155	-70	Stratigraphic hole
MAD152	Radar	234933	6807257	414	81.7	180	-70	EM Plate 30,000 siemens
MAD153	Cathedrals	233627	6807171	420	450	155	-65	Stratigraphic hole
MAD154	Stricklands	232284	6806673	442	450	135	-65	Stratigraphic hole
MAD155	Investigators	231925	6806510	420	120.8	120.8	-70	EM Plate 8,000 siemens
MAD156	Investigators	231651	6806571	426	220.1	220.1	-78	EM plate 30,000 siemens
MAD157	Investigators	231008	6806504	418.7	220.1	220.1	-78	EM plate 89,000 siemens
MAD158	Investigators	231174	6806451	420	211.2	211.2	-85	EM Plate 8,000 siemens
MAD159	Investigators	231982	6806672	431	300	300	-65	Step-out Stratigraphic hole
MAD160	Investigators	231110	6806639	420	300	300	-65	Step-out Stratigraphic hole
MARC123	West End	228729	6806529	407	226	180	-65	SAM Stratigraphic hole
MARC124	Investigators	230871	6806300	418	155	180	-70	SAM Stratigraphic hole
MARC125	Investigators	231158	6806262	421	101	200	-70	SAM Stratigraphic hole
MARC126	Investigators	231272	6806262	422	89	180	-70	SAM Stratigraphic hole
MARC127	West End	230701	6806679	417	203	180	-65	SAM Stratigraphic hole
MARC128	Stricklands	232361	6806549	441	166	96	-76	EM Plate 10,000 siemens

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ASX / MEDIA RELEASE

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MARC129	West End	230552	6806287	416	143	180	-70	SAM Stratigraphic hole
MARC130	Bullets	236227	6807439	420	120	150	-65	SAM Stratigraphic hole
MARC131	Bullets	236184	6807516	420	154	150	-65	SAM Stratigraphic hole

Table 1 – drill holes completed and underway in current drill programme at Mt Alexander.

About the Mt Alexander Project:

The Mt Alexander Project is located 120km south-southwest of the Agnew-Wiluna Belt, which hosts numerous world-class nickel deposits. The Project comprises five granted exploration licences – E29/638, E29/548, E29/962, E29/954 and E29/972.

The Cathedrals, Stricklands and Investigators nickel-copper-cobalt-PGE discoveries are located on E29/638, which is held in joint venture by St George Mining Limited (75%) and Western Areas Limited (25%). St George is the Manager of the Project, with Western Areas retaining a 25% non-contributing interest in the Project (in regard to E29/638 only) until there is a decision to mine.

For further information, please contact:

John Prineas Peter Klinger Executive Chairman Media and Investor Relations St George Mining Limited Cannings Purple +61 (0) 411 421 253 +61 (0) 411 251 540 John.prineas@stgm.com.au pklinger@canningspurple.com.au

Competent Person Statement:

The information in this report that relates to Exploration Targets, Exploration Results, Mineral Resources or Ore Reserves is based on information compiled by Mr Dave O’Neill, a Competent Person who is a Member of The Australasian Institute of Mining and Metallurgy. Mr O’Neill is employed by St George Mining Limited to provide technical advice on mineral projects, and he holds performance rights issued by the Company.

Mr O’Neill has sufficient experience that is relevant to the style of mineralisation and type of deposit under consideration and to the activity being undertaken to qualify as a Competent Person as defined in the 2012 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’. Mr O’Neill consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.

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The following section is provided for compliance with requirements for the reporting of exploration results under the JORC Code, 2012 Edition.

Section 1 Sampling Techniques and Data

(Criteria in this section apply to all succeeding sections)

Criteria JORC Code explanation	Commentary
Sampling techniques Nature and quality of sampling (eg cut channels, random chips, or specific specialised industry standard measurement tools appropriate to the minerals under investigation, such as down hole gamma sondes, or handheld XRF instruments, etc). These examples should not be taken as limiting the broad meaning of sampling.	Drilling programmes are completed by Reverse Circulation (RC) and Diamond Core drilling. Surface Electro‐Magnetic (EM) surveys are completed by GAP geophysics. Diamond Core Sampling:_The sections of the core that are selected for assaying are marked up and then recorded on a sample sheet for cutting and sampling at the certified assay laboratory. Samples of HQ or NQ2 core are cut just to the right of the orientation line where available using a diamond core saw, with half core sampled lengthways for assay. _RC Sampling: All samples from the RC drilling are taken as 1m samples for laboratory assay. _EM Surveying:_All data is collected in a Moving Loop (MLEM) survey configuration using MLEM TX transmitter with a SMARTem 24 receiver. Appropriate QAQC samples (standards, blanks and duplicates) are inserted into the sequences as per industry best practice. Samples are collected using cone or riffle splitter. Geological logging of RC chips is completed at site with representative chips being stored in drill chip trays. Onsite XRF analysis is conducted on the fines from RC chips using a hand‐held Olympus Innov‐X Spectrum Analyser. These results are used for onsite interpretation and preliminary assessment subject to final geochemical analysis by laboratory assays.
Include reference to measures taken to ensure sample representivity and the appropriate calibration of any measurement tools or systems used.	_RC Sampling:_Samples are taken on a one metre basis and collected using uniquely numbered calico bags. The remaining material for that metre is collected and stored in a green plastic bag marked with that specific metre interval. The cyclone is cleaned with compressed air after each plastic and calico sample bag is removed. If wet sample or clays are encountered then the cyclone is opened and cleaned manually and with the aid of a compressed air gun. A blank sample is inserted at the beginning of each hole, and a duplicate sample is taken every 50thsample. A certified sample standard is also added according to geology, but at no more than 1:50 samples. Geological logging of RC chips is completed at site with representative chips being stored in drill chip trays. Downhole surveys of dip and azimuth are conducted using a single shot camera every 30m, and using a downhole Gyro when required, to detect deviations of the hole from the planned dip and azimuth. The drill‐hole collar locations are recorded using a hand‐held GPS, which has an accuracy of +/‐ 5m. All drill‐hole collars will be surveyed to a greater degree of accuracy using a certified surveyor at a later date. _Diamond Core Sampling:_For diamond core samples, certified sample standards were added as every 25thsample. Core recovery calculations are made through a reconciliation of the actual core and the driller’s records. Downhole surveys of dip and azimuth were conducted using a single shot camera every 30m to detect deviations of the hole from the planned dip and azimuth. The drill‐hole collar locations are recorded using a hand‐held GPS, which has an accuracy of +/‐ 5m. All drill‐hole collars will be surveyed to a greater degree of accuracy using a certified surveyor at a later date.

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Criteria JORC Code explanation	Commentary
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.	_RC Sampling:_A 1m composite sample is taken from the bulk sample of RC chips that may weigh in excess of 40 kg. Each sample collected for assay typically weighs 2‐3kg, and once dried, is prepared for the laboratory as per the Diamond samples below. _Diamond Core Sampling:_Diamond core (both HQ and NQ2) is half‐ core sampled to geological boundaries no more than 1.5m and no less than 10cm. Samples less than 3kg are crushed to 10mm, dried and then pulverised to 75µm. Samples greater than 3kg are first crushed to 10mm then finely crushed to 3mm and input into the rotary splitters to produce a consistent output weight for pulverisation. Pulverisation produces a 40g charge for fire assay. Elements determined from fire assay are gold (Au), platinum (Pt) and palladium (Pd) with a 1ppb detection limit. To determine other PGE concentrations (Rh, Ru, Os, Ir) a 25g charge for nickel sulphide collect fire assay is used with a 1ppb detection limit. Other elements will be analysed using an acid digest and an ICP finish. These elements are: Ag, Al, As, Bi, Ca, Cd, Co, Cr, Fe, K, Li, Mg, Mn, Mo, Nb, Ni, P, Pb, S, Sb, Sn, Te, Ti, V, W, Zn. The sample is digested with nitric, hydrochloric, hydrofluoric and perchloric acids to effect as near to total solubility of the sample as possible. The sample is then analysed using ICP‐AES or ICP‐MS. LOI (Loss on Ignition) will be completed on selected samples to determine the percentage of volatiles released during heating of samples to 1000°C.
Drilling techniques Drill type (eg core, reverse circulation, open‐hole hammer, rotary air blast, auger, Bangka, sonic, etc) and details (eg core diametre, 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).	_Diamond Core Sampling:_The collars of the diamond holes were drilled using RC drilling down through the regolith to the point of refusal or to a level considered geologically significant to change to core. The hole was then continued using HQ diamond core until the drillers determined that a change to NQ2 coring was required. The core is oriented and marked by the drillers. The core is oriented using ACT Mk II electric core orientation. _RC Sampling:_The RC drilling uses a 140 mm diametre face hammer tool. High capacity air compressors on the drill rig are used to ensure a continuously sealed and high pressure system during drilling to maximise the recovery of the drill cuttings, and to ensure chips remain dry to the maximum extent possible.
Drill sample recovery Method of recording and assessing core and chip sample recoveries and results assessed. Measures taken to maximise sample recovery and ensure representative nature of the samples.	_Diamond Core Sampling:_Diamond core recoveries are recorded during drilling and reconciled during the core processing and geological logging. The core length recovered is measured for each run and recorded which is used to calculate core recovery as a percentage. _RC Sampling:_RC samples are visually checked for recovery, moisture and contamination. Geological logging is completed at site with representative RC chips stored in chip trays.
	_RC Sampling:_Samples are collected using cone or riffle splitter. Geological logging of RC chips is completed at site with representative chips being stored in drill chip trays. _Diamond Core Sampling:_Measures taken to maximise core recovery include using appropriate core diameter and shorter barrel length through the weathered zone, which at Cathedrals and Investigators is mostly <20m and Stricklands <40m depth. Primary locations for core loss in fresh rock are on geological contacts and structural zones, and drill techniques are adjusted accordingly, and if possible these zones are predicted from the geological modelling.

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Criteria JORC Code explanation	Commentary
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.	To date, no sample recovery issues have yet been identified that would impact on potential sample bias in the competent fresh rocks that host the mineralised sulphide intervals.
Logging Whether core and chip samples have been geologically and geotechnically logged to a level 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.	Geological logging is carried out on all drill holes with lithology, alteration, mineralisation, structure and veining recorded.
	Logging of diamond core and RC samples records lithology, mineralogy, mineralisation, structures (core only), weathering, colour and other noticeable features. Core was photographed in both dry and wet form.
	All drill holes are geologically logged in full and detailed litho‐ geochemical information is collected by the field XRF unit. The data relating to the elements analysed is used to determine further information regarding the detailed rock composition.
Sub‐sampling techniques and sample preparation If core, whether cut or sawn and whether quarter, half or all core taken. If non‐core, whether riffled, tube sampled, rotary split, etc and whether sampled wet or dry. For all sample types, the nature, quality and appropriateness of the sample preparation technique. Quality control procedures adopted for all sub‐ sampling stages to maximise representivity of samples.	_Diamond Core Sampling:_Diamond core was drilled with HQ and NQ2 size and sampled as complete half core to produce a bulk sample for analysis. Intervals selected varied from 0.3 – 1m (maximum) The HQ and NQ2 core is cut in half length ways just to the right of the orientation line where available using a diamond core saw. All samples are collected from the same side of the core where practicable. Assay preparation procedures ensure the entire sample is pulverised to 75 microns before the sub‐sample is taken. This removes the potential for the significant sub‐sampling bias that can be introduced at this stage.
	RC samples are collected in dry form. Samples are collected using cone or riffle splitter when available. Geological logging of RC chips is completed at site with representative chips being stored in drill chip trays.
	RC Sampling: Sample preparation for RC chips follows a standard protocol. The entire sample is pulverised to 75µm using LM5 pulverising mills. Samples are dried, crushed and pulverized to produce a homogenous representative sub‐sample for analysis. A grind quality target of 90% passing 75µm is used.
	Quality control procedures include submission of Certified Reference Materials (standards), duplicates and blanks with each sample batch. QAQC results are routinely reviewed to identify and resolve any issues_. _RC Sampling: Field QC procedures maximise representivity of RC samples and involve the use of certified reference material as assay standards, along with blanks, duplicates and barren washes. _Diamond Core Sampling:_Drill core is cut in half lengthways and the total half‐core submitted as the sample. This meets industry standards where 50% of the total sample taken from the diamond core is submitted.

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Criteria	JORC Code explanation	Commentary
	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.	Duplicate samples are selected during sampling. Samples comprise two quarter core samples for Diamond Core. Duplicate RC samples are captured using two separate sampling apertures on the splitter.
	Whether sample sizes are appropriate to the grain size of the material being sampled.	The sample sizes are considered to be appropriate to correctly represent base metal sulphide mineralisation and associated geology based on: the style of mineralisation (massive and disseminated sulphides), the thickness and consistency of the intersections and the sampling methodology.
Quality of assay data and laboratory tests	The nature, quality and appropriateness of the assaying and laboratory procedures used and whether the technique is considered partial or total.	For RC sampling, a 30 gram sample will be fire assayed for gold, platinum and palladium. The detection range for gold is 1 – 2000 ppbAu, and 0.5 – 2000 ppb for platinum and palladium. This is believed to be an appropriate detection level for the levels of these elements within this specific mineral environment. However, should Au, Pt or Pd levels reported exceed these levels; an alternative assay method will be selected. All other metals will be analysed using an acid digest and an ICP finish. The sample is digested with nitric, hydrochloric, hydrofluoric and perchloric acids to effect as near to total solubility of the sample as possible. The solution containing samples of interest, including those that need further review, will then be presented to an ICP‐OES for the further quantification of the selected elements. Diamond core samples are analysed for Au, Pt and Pd using a 40g lead collection fire assay; for Rh, Ru, Os, Ir using a 25g nickel sulphide collection fire assay; and for Ag, Al, As, Bi, Ca, Cd, Co, Cr, Fe, K, Li, Mg, Mn, Mo, Nb, Ni, P, Pb, S, Sb, Sn, Te, Ti, V, W, Zn using a four acid digest and ICP‐AES or MS finish. The assay method and detection limits are appropriate for analysis of the elements required.
	For geophysical tools, spectrometres, handheld XRF instruments, etc, the parametres used in determining the analysis including instrument make and model, reading times, calibrations factors applied and their derivation, etc.	MLEM: 200m x 200m loops with 50m stations were used for the MLEM surveys. The MLEM TX transmitter uses a base frequency of 0.25 or 0.5Hz and 100amps. The SMARTem 24 is a fluxgate receiver. XRF: A handheld XRF instrument (Olympus Innov‐X Spectrum Analyser) is used to systematically analyse the drill core and RC sample piles onsite. One reading is taken per metre, however for any core samples with matrix or massive sulphide mineralisation then multiple samples are taken at set intervals per metre. The instruments are serviced and calibrated at least once a year. Field calibration of the XRF instrument using standards is periodically performed (usually daily). The handheld XRF results are only used for preliminary assessment and reporting of element compositions, prior to the receipt of assay results from the certified laboratory.
	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.	Laboratory QAQC involves the use of internal lab standards using certified reference material (CRMs), blanks and pulp duplicates as part of in‐house procedures. The Company also submits a suite of CRMs, blanks and selects appropriate samples for duplicates. Sample preparation checks for fineness are performed by the laboratory to ensure the grind size of 90% passing 75µm is being attained.
Verification of sampling and assaying	The verification of significant intersections by either independent or alternative company personnel.	Significant intersections are verified by the Company’s technical staff.
	The use of twinned holes.	No twinned holes have been planned for the current drill programme.

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Criteria	JORC Code explanation	Commentary
	Documentation of primary data, data entry	Primary data is captured onto a laptop using acQuire software and
	procedures, data verification, data storage	includes geological logging, sample data and QA/QC information. This
	(physical and electronic) protocols.	data, together with the assay data, is entered into the St George
		Mining central SQL database which is managed by external
		consultants.
	Discuss any adjustment to assay data.	No adjustments or calibrations will be made to any primary assay data
		collected for the purpose of reporting assay grades and mineralised
		intervals. For the geological analysis, standards and recognised
		factors may be used to calculate the oxide form assayed elements, or
		to calculate volatile free mineral levels in rocks.
Location of	Accuracy and quality of surveys used to locate	Drill holes and EM stations have been located and pegged using a
data points	drill holes (collar and down‐hole surveys),	DGPS system with an expected accuracy of +/‐5m for easting,
	trenches, mine workings and other locations	northing and elevation.
	used in Mineral Resource estimation.	Downhole surveys are conducted using a single shot camera
		approximately every 30m or downhole Gyro during drilling to record
		and monitor deviations of the hole from the planned dip and azimuth.
		Post‐drilling downhole gyroscopic surveys will be conducted, which
		provide more accurate survey results.
	Specification of the grid system used.	The grid system used is GDA94, MGA Zone 51.
	Quality and adequacy of topographic control.	Elevation data has been acquired using DGPS surveying at individual
		collar locations and entered into the central database. A
		topographic surface has been created using this elevation data.
Data spacing	Data spacing for reporting of Exploration	The spacing and distribution of holes is not relevant to the drilling
and	Results.	programs which are at the exploration stage rather than definition
distribution		drilling.
	Whether the data spacing and distribution is	The completed drilling at the Project is not sufficient to establish the
	sufficient to establish the degree of geological	degree of geological and grade continuity to support the definition of
	and grade continuity appropriate for the	Mineral Resource and Reserves and the classifications applied under
	Mineral Resource and Ore Reserve estimation	the 2012 JORC code.
	procedure(s) and classifications applied.
	Whether sample compositing has been applied.	No compositing has been applied to the exploration results.
Orientation of	Whether the orientation of sampling achieves	The drill holes are drilled to intersect the modelled mineralised zones
data in relation	unbiased sampling of possible structures and	at a near perpendicular orientation (unless otherwise stated).
to geological	the extent to which this is known, considering	However, the orientation of key structures may be locally variable
structure	the deposit type.	and any relationship to mineralisation has yet to be identified.
	If the relationship between the drilling	No orientation based sampling bias has been identified in the data
	orientation and the orientation of key	to date.
	mineralised 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.	Chain of Custody is managed by the Company until samples pass to a
security		duly certified assay laboratory for subsampling and assaying. The RC
		sample bags are stored on secure sites and delivered to the assay
		laboratory by the Company or a competent agent. When in transit,
		they are kept in locked premises. Transport logs have been set up to
		track the progress of samples.
Audits or	The results of any audits or reviews of sampling	Sampling techniques and procedures are regularly reviewed
reviews	techniques and data.	internally, as is data. To date, no external audits have been
		completed on the drilling programme.

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Section 2 Reporting of Exploration Results (Criteria listed in section 1 will also apply to this section where relevant)

Criteria JORC Code explanation	Commentary
Mineral Tenement and Land Status Type, name/reference number, location and ownership including agreements or material issues with third parties including joint ventures, partnerships, overriding royalties, native title interests, historical sites, wilderness or national park and environmental settings. 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.	The Mt Alexander Project is comprised of five granted Exploration Licences (E29/638, E29/548, E29/954, E29/962 and E29/972). Tenement E29/638 is held in Joint Venture between St George (75% interest) and Western Areas (25% interest). E29/638 and E29/548 are also subject to a royalty in favour of a third party that is outlined in the ASX Release dated 17 December 2015 (as regards E29/638) and the ASX release dated 18 September 2015 (as regards E29/548). No environmentally sensitive sites have been identified on the tenements. A registered Heritage site known as Willsmore 1 (DAA identification 3087) straddles tenements E29/548 and E29/638. All five tenements are in good standing with no known impediments.
Exploration Done by Other Parties Acknowledgment and appraisal of exploration by other parties.	Exploration on tenements E29/638 and E29/962 has been largely for komatiite‐hosted nickel sulphides in the Mt Alexander Greenstone Belt. Exploration in the northern section of E29/638 (Cathedrals Belt) and also limited exploration on E29/548 has been for mafic/ultramafic intrusion related Ni‐Cu‐PGE sulphides. No historic exploration has been identified on E29/954 or E29/972. High grade nickel‐copper‐PGE sulphides were discovered at the Mt Alexander Project in 2008. Drilling was completed to test co‐incident electromagnetic (EM) and magnetic anomalies associated with nickel‐PGE enriched gossans in the northern section of current tenement E29/638. The drilling identified high grade nickel‐copper mineralisation in granite‐hosted ultramafic units and the discovery was named the Cathedrals Prospect.
Geology Deposit type, geological setting and style of mineralisation	The Mt Alexander Project is at the northern end of a western bifurcation of the Mt Ida Greenstones. The greenstones are bound to the west by the Ida Fault, a significant Craton‐scale structure that marks the boundary between the Kalgoorlie Terrane (and Eastern Goldfields Superterrane) to the east and the Youanmi Terrane to the west. The Mt Alexander Project is prospective for further high‐grade komatiite‐hosted nickel‐copper‐PGE mineralisation (both greenstone and granite hosted) and also precious metal mineralisation (i.e. orogenic gold) that is typified elsewhere in the Yilgarn Craton.
Drill hole information A summary of all information material to the understanding of the exploration results including tabulation of the following information for all Material drill holes: • Easting and northing of the drill hole collar •Elevation or RL (Reduced Level – elevation above sea level in metres) of the drill hole collar • Dip and azimuth of the hole • Down hole length and interception depth • Hole length	Drill hole collar locations are shown in the maps and tables included in the body of the relevant ASX releases.
Data aggregation methods In reporting Exploration Results, weighting averaging techniques, maximum and/or minimum grade truncations (e.g. cutting of high grades) and cut‐off grades are usually Material and should be stated.	Reported assay intersections are length and density weighted. Significant intersections are determined using both qualitative (i.e. geological logging) and quantitative (i.e. lower cut‐off) methods. For massive sulphide intersections, the nominal lower cut‐off is 2% for either nickel or copper. For disseminated, blebby and matrix sulphide intersections the nominal lower cut‐off for nickel is 0.3%.

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Criteria	JORC Code explanation	Commentary
	Where aggregated intercepts incorporate short	Any high‐grade sulphide intervals internal to broader zones of
	lengths of high grade results and longer lengths	sulphide mineralisation are reported as included intervals.
	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.	Any disseminated, matrix, brecciated or stringer sulphides with (usually) >1% nickel or copper on contact with massive sulphide mineralisation are grouped with the massive sulphides for calculating significant intersections and the massive sulphide
		mineralisation is reported as an including intersection.
	The assumptions used for any reporting of	No metal equivalent values are used for reporting exploration
	metal equivalent values should be clearly	results.
	stated.
Relationship	These relationships are particularly important in	Assay intersections are reported as down hole lengths. Drill holes are
between	the reporting of exploration results. If the	planned as perpendicular as possible to intersect the target EM plates
mineralisation	geometry of the mineralisation with respect to	and geological targets so downhole lengths are usually interpreted to
widths and	the drill hole angle is known, its nature should	be near true width.
intercept	be reported. If it is not known and only the down
lengths	hole lengths are reported, there should be a
	clear statement to this effect.
iagrams	Appropriate maps and sections (with scales) and	A prospect location map, cross section and long section are shown
	tabulations of intercepts should be included for	in the body of relevant ASX Releases.
	any significant discovery being reported. These
	should include, but not be limited to a plane
	view of drill hole collar locations and
	appropriate sectional views.
Balanced	Where comprehensive reporting of all	Reports on recent exploration can be found in ASX Releases that are
Reporting	Exploration Results is not practical,	available on our website atwww.stgm.com.au:
	representative reporting of both low and high grades and/or widths should be practiced to avoid misleading reporting of Exploration Results.	The exploration results reported are representative of the mineralisation style with grades and/or widths reported in a consistent manner.
Other	Other exploration data, if meaningful and	All material or meaningful data collected has been reported.
substantive	material, should be reported including (but not
exploration	limited to): geological observation; geophysical
data	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.
Further Work	The nature and scale of planned further work	A discussion of further exploration work underway is contained in the
	(e.g. tests for lateral extensions or depth	body of recent ASX Releases.
	extensions or large – scale step – out drilling).Diagrams clearly highlighting the areas of possible extensions, including the main	Further exploration will be planned based on ongoing drill results, geophysical surveys and geological assessment of prospectivity.
	geological interpretations and future drilling
	areas, provided this information is not
	commercially sensitive.

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