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1 Tel: Fax: dcrook@pioresources.com.au ABN: Address: 21 Ord Street West Perth Western Australia Postal: PO Box 1787 West Perth Western Australia 6872 INFILL DRILLING CONFIRMS CONTINUITY OF HIGH-GRADES AT THE SINCLAIR ZONE CAESIUM DEPOSIT PREPARATIONS FOR MINING ADVANCE Perth Western Australia, 19 April 2018: Pioneer Resources Limited ("Company" or "Pioneer", ASX: PIO) is pleased to provide a drilling update for its 100%-held Pioneer Dome Project in the Eastern Goldfields of Western Australia, which includes the Sinclair Zone Caesium Deposit. A programme of diamond-drilling was principally undertaken to infill 5 sections with the strongest caesium mineralisation (in the form of the mineral pollucite) in preparation for final open pit mine design work. Each of the key sections returned pollucite intersections in line with earlier modelling. Caesium (Pollucite) intersections included: PDD162: 11.15m at 17.43% Cs2O from 38.2m PDD166: 5.70m at Cs2O from 37.7m PDD167: 2.68m at Cs2O from 40.82m and 7.18m at Cs2O from 47.88m PDD170: 7.45m at Cs2O from 43.6m PDD174: 4.30m at Cs2O from 43.5m Lithium mineralisation (petalite and lepidolite), which occurs peripheral to the caesium mineralisation, included: PDD161: m at 2.14% Li2O from 41.98m PDD163: m at 2.27% Li2O from 40.57m PDD164: m at 2.64% Li2O from 39.9m PDD168: m at 1.75% Li2O from 40.5m PDD173: m at 1.82% Li2O from 34.3m PDD175: m at 1.94% Li2O from 41.9m PDD176: m at 1.62% Li2O from 38.0m PRE-MINE DRILLING AT THE SINCLAIR ZONE CAESIUM DEPOSIT. The programme totalled 20 drill holes and produced 1,333.29m of core. Of these, 15 holes targeted caesium or lithium mineralisation, 4 holes were completed adjacent to the proposed pit walls to provide geotechnical information, and 1 hole became blocked and was abandoned. Most holes also intersected potassium (microcline). With lithium and caesium results to hand, Pioneer s geological consultants from the Mitchell River Group are revising the Mineral Resource Estimate for caesium. Potassium (microcline) samples, which require specialised processing, are currently being analysed, with results expected before the end of April. The open pit design and confirmation economic study are on track to be concluded by the end of May, 2018.

2 Figure 1: Pioneer Dome Project Location Pioneer 100%, Lithium, Caesium, Potassium, Nickel Sulphide. For personal use only The Pioneer Dome Project is in the Eastern Goldfields of WA. The Project is approximately 130km south of Kalgoorlie, and 200km north of the port of Esperance, in WA. Figure 2: Diagrammatic Sinclair Pit oblique view showing drill holes from the reported drilling programme, with pollucite intersections as coloured disks. Cross Section is shown in Figure 4. Figure 3: Diagrammatic Sinclair Pit oblique view showing all drill holes, and pollucite intersections as coloured disks. The long axis of the pit is 160m 2

3 Figure 4: Sinclair Zone Caesium Deposit Cross Section at mN with diagrammatic pit outline. Drill holes intersect monomineralic phases that comprise the Sinclair Pegmatite core zone. A wellformed zone of microcline (yellow) overlies the pollucite (red) and lepidolite (purple). CONCURRENT WORK FOR OTHER MINERALS In addition to the targeted caesium (pollucite) mineralisation, broad zones of a range of other alkali-metal minerals, including lithium (petalite and lepidolite) and potassium (microcline) have been consistently intersected within the Sinclair Pegmatite. On the basis that the Board determines to proceed with mining, as the microcline, petalite and lepidolite will be mined through to access the pollucite, the Company will stockpile these minerals, and is advancing commercial opportunity discussions for each with third parties. POTASSIUM (MICROCLINE) In an announcement dated 21 February 2018 the Company provided information about a zone of microcline that had been intersected in drill core, overlying the Sinclair Zone Caesium Deposit. The initial samples, from drill holes PDD125 and PDD126, plotted in the premium A-Grade Microcline field, a product that is used in the manufacture of porcelain and certain glass types. Core from the 2018 drilling programme has continued to intersect the microcline mineralisation, which is now evident over a strike length exceeding 250m. Currently over 400 microcline samples have been prepared for analysis using iron-free equipment, with results from fusion XRF analysis due later in April. With these results in hand, the Company can best formulate a strategy to commercialise the microcline. THE NEXT PHASE OF DRILLING The next pass of RC drilling is underway, designed to test targets to the immediate north of the Sinclair Zone Caesium Deposit, principally targeting lithium minerals but also supplying information to enable future targeting for caesium. These holes will also intersect the microcline zone. 3

4 DEVELOPMENT-FOCUSED OUTLOOK Regulatory documents are progressively being assembled to permit the extraction of the Sinclair Zone Caesium Deposit; Detailed pit design scenario work is underway. This will include variants where other pegmatite minerals (including lepidolite and microcline) are extracted for sale in addition to pollucite. From this: The Mine Plan and revenue estimates will be finalised, the decision to mine considered, and quotes sought from mining contractors; On the basis that the Board determines to proceed with mining, and receiving the required permitting, the Company is working towards extracting the Sinclair Zone Caesium Deposit during the second half of Pioneer s Managing Director, David Crook, said The Sinclair Deposit is proving to be an exciting opportunity for the Company as it moves towards its first mining operation. This round of drilling confirmed the continuity of the pollucite mineralisation, significantly de-risking the project from an ore supply perspective, The Company is entirely focussed on advancing the Mine Plan (environmental) and Project Management Plan (safety), and moving towards production. Managing Director Pioneer Resources Limited ABOUT POLLUCITE THE PRINCIPAL ORE MINERAL OF CAESIUM Pollucite is a rare mineral of caesium that forms only in extremely differentiated zones of rare-metal lithiumcaesium-tantalum pegmatite systems. It is found in commercial quantities at the Bikita Mine in Zimbabwe; and the Tanco Mine in Canada where it is mined principally for use in the manufacture of Caesium Formate, a highdensity fluid used in high temperature/high pressure oil and gas drilling. The principal Caesium Formate manufacturer and dealer is Cabot Corporation (NYSE: CBT), through its Cabot Speciality Fluids division. Caesium Formate provides a number of well documented benefits including, minimal damage to the hydrocarbon-bearing formation resulting in higher production rates, where it acts as a lubricant, is non-corrosive and is considered an environmentally-friendly benign chemical when compared to alternatives. Caesium in principal commercial usage is the non-radioactive isotope. (Refer to Downs, J., et al) Photograph 1: PDD162 pollucite from 40.38m to 43.72m (from a total intersection 11.15m - see Figure 4) which averages approximately 22% Cs2O. 4

5 For further information please contact: David Crook James Moses Pioneer Resources Limited Media and Investor Relations T: M: E: E: About Pioneer Resources Limited Pioneer is an active exploration company focused on key global demand-driven commodities. The Company operates a portfolio of strategically located lithium, caesium, potassium ( alkali metals ), nickel, cobalt and gold projects in mining regions in Western Australia, plus a portfolio of high quality lithium assets in Canada. Drilling is in progress, or has been recently completed, at each of these Projects: Pioneer Dome Project and the Sinclair Zone Caesium Deposit: In early 2017 Pioneer reported the discovery of Australia s first caesium (in the mineral pollucite ) deposit. Pollucite is a high value mineral and global supply is very constrained. It is a rare caesium mineral that forms in extremely differentiated LCT pegmatite systems. The primarily use of pollucite is in the manufacture of Caesium Formate brine used in high temperature/high pressure oil and gas drilling. The Company s core focus is to advance the Sinclair Zone Caesium Deposit towards development. The Project has the potential to be a high margin operation for the Company and works programmes continued during the quarter. With Mining Lease M63/665 and Miscellaneous Licence L63/77 granted in December 2017, mine planning permitting is well under way. Lithium: Mavis Lake and Raleigh Projects, Canada; Pioneer Dome Project, WA: Lithium has been classed as a critical metal meaning it has a number of important uses across various parts of the modern, globalised economy including communication, electronic, digital, mobile and battery technologies; and transportation, particularly aerospace and automotive emissions reduction. Critical metals seem likely to play an important role in the nascent green economy, particularly solar and wind power; electric vehicle and rechargeable batteries; and energy-efficient lighting. Cobalt: Golden Ridge Project, WA: Cobalt demand is expanding in response to its requirement in the manufacture of cobalt-based lithium batteries in certain electric vehicles and electricity stabilisation systems (powerwalls). Other uses for cobalt include in the manufacture of super-alloys, including jet engine turbine blades, and for corrosion resistant metal applications. Nickel: Blair Dome/Golden Ridge Project: The price for nickel is steadily improving. The Company owns the closed Blair Nickel Sulphide Mine located between Kalgoorlie and Kambalda, WA, where near-mine target generation is continuing. The Company recently announced a significant new nickel sulphide drilling intersection at the Leo s Dam Prospect, highlighting the prospectivity of the greater project area. REFERENCES Pioneer Dome: Refer Company s quarterly technical reports, and announcements to ASX 19 May 2016, 27 July 2016, 28 August 2016, 1 September 2016, 4 October 2016, 17 October 2016, 14 November 2016, 2 December 2016, 13 December 2016, 13 January 2017, 24 January 2017, 23 February 2017, 20 March 2017, 22 March 2017 (Sinclair Measured Resource Statement), 20 June 2017, 22 August 2017, 9October 2017, 17 January 2018, 21 February Downs, J. D., Blaszczynski, M., Turner, J., and Harris, M. (2006): Drilling and Completing Difficult HP/HT Wells with the aid of Cesium Formate Brines A Performance review. London, David (2016) Pegmatites, Minerological Association of Canada. The Company is not aware of any new information or data that materially affects the information included in this Report. 5

6 COMPETENT PERSON The information in this report that relates to Exploration Results is based on information supplied to and compiled by Mr David Crook. Mr Crook is a fulltime employee of Pioneer Resources Limited. Mr Crook is a member of The Australasian Institute of Mining and Metallurgy and the Australian Institute of Geoscientists and has sufficient experience which is relevant to the exploration processes undertaken to qualify as a Competent Person as defined in the 2012 Editions of the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves. Mr Crook consents to the inclusion of the matters presented in the announcement in the form and context in which they appear. CAUTION REGARDING FORWARD LOOKING INFORMATION This Announcement may contain forward looking statements concerning the projects owned or being earned in by the Company. Statements concerning mining reserves and resources may also be deemed to be forward looking statements in that they involve estimates based on specific assumptions. Forward-looking statements are not statements of historical fact and actual events and results may differ materially from those described in the forward looking statements as a result of a variety of risks, uncertainties and other factors. Forward-looking statements are inherently subject to business, economic, competitive, political and social uncertainties and contingencies. Many factors could cause the Company s actual results to differ materially from those expressed or implied in any forward-looking information provided by the Company, or on behalf of, the Company. Such factors include, among other things, risks relating to additional funding requirements, metal prices, exploration, development and operating risks, competition, production risks, regulatory restrictions, including environmental regulation and liability and potential title disputes. Forward looking statements in this document are based on the Company s beliefs, opinions and estimates of the Company as of the dates the forward looking statements are made, and no obligation is assumed to update forward looking statements if these beliefs, opinions and estimates should change or to reflect other future developments. There can be no assurance that the Company s plans for development of its mineral properties will proceed as currently expected. There can also be no assurance that the Company will be able to confirm the presence of additional mineral deposits, that any mineralisation will prove to be economic or that a mine will successfully be developed on any of the Company s mineral properties. Circumstances or management s estimates or opinions could change. The reader is cautioned not to place undue reliance on forward-looking statements. 6

7 APPENDIX 1. Drill Hole Information and Results Summary Table 1 Diamond Core Drill Hole Collar Locations Hole ID Type Grid East North RL Dip azimuth Depth ( 0 ) ( 0 ) PDD161 DD MGA94_51 371, ,468, PDD162 DD MGA94_51 371, ,468, PDD163 DD MGA94_51 371, ,468, PDD164 DD MGA94_51 371, ,468, PDD165 DD MGA94_51 371, ,468, PDD166 DD MGA94_51 371, ,468, PDD167 DD MGA94_51 371, ,468, PDD168 DD MGA94_51 371, ,468, PDD169 DD MGA94_51 371, ,468, PDD170 DD MGA94_51 371, ,468, PDD171 DD MGA94_51 371, ,468, PDD172 DD MGA94_51 371, ,468, PDD173 DD MGA94_51 371, ,468, PDD174 DD MGA94_51 371, ,468, PDD175 DD MGA94_51 371, ,468, PDD176 DD MGA94_51 371, ,468, PDD177 DD MGA94_51 371, ,468, PDD178 DD MGA94_51 371, ,468, PDD179 DD MGA94_51 371, ,468, PDD180 DD MGA94_51 371, ,468, Notes: Hole locations were measured by a licenced surveyor in MGA 94 zone 51 using a DGPS. The azimuth is in true north degrees. 7

8 Hole ID From To Cs 2O Calc% Table 2 Diamond Core Drill Hole Collar Selected Assays Cs 2O Cs Li 2O Li Rb (%) (calc%) SiO 2 (%) Ta Al PDD ,112 PDD ,731 1, ,362 PDD , ,412 16, ,234 PDD , ,537 16, ,277 PDD , ,847 16, ,251 PDD , ,133 11, ,654 PDD , ,398 13, ,757 PDD , ,666 11, ,160 PDD ,746 PDD ,143 PDD ,278 2, ,384 PDD ,196 PDD , ,664 17, ,294 PDD , ,320 19, ,345 PDD , ,930 17, ,046 PDD , ,280 8, ,686 PDD ,224 PDD , ,141 14, ,346 PDD ,300 PDD , ,414 13,183 1, ,667 PDD , ,045 10, ,289 PDD , , ,374 PDD , ,895 10, ,185 PDD , ,972 10, ,644 PDD , ,085 7, ,610 PDD , ,784 7, ,098 PDD ,970 1, ,530 PDD ,135 PDD ,400 PDD ,400 PDD ,900 PDD , , ,243 PDD ,800 PDD ,900 PDD ,800 PDD , , ,248 PDD PDD ,427 PDD ,300 PDD ,000 PDD ,100 PDD , ,295 8

9 Hole ID From To Cs 2O Calc% Table 2 Diamond Core Drill Hole Collar Selected Assays Cs 2O Cs Li 2O Li Rb (%) (calc%) SiO 2 (%) Ta Al PDD ,100 PDD , ,807 8, ,188 PDD , ,826 6, ,016 PDD , ,112 4, ,579 PDD , ,090 11, ,295 PDD ,299 PDD , ,514 1, ,483 PDD ,500 PDD , ,906 PDD , ,758 PDD ,740 1, ,949 PDD , ,727 10, ,653 PDD , ,383 13, ,236 PDD , ,016 14, ,495 PDD , ,593 12, ,864 PDD , ,232 18, ,413 PDD , ,502 17, ,421 PDD , ,001 11, ,458 PDD , ,138 11, ,781 PDD , ,948 11, ,717 PDD , ,801 9, ,157 PDD ,453 3, ,585 PDD , ,855 1, ,584 PDD , , ,184 PDD , , ,146 PDD , ,069 PDD PDD ,359 2, ,298 PDD , , ,583 PDD , , ,062 PDD , , ,953 PDD , , ,359 PDD , , ,710 PDD , , ,176 PDD ,100 PDD , ,698 17, ,290 PDD ,400 PDD , ,104 18, ,789 PDD , ,570 13, ,893 PDD , ,402 17, ,320 PDD , ,152 12, ,254 PDD , ,279 4, ,732 9

10 Hole ID From To Cs 2O Calc% Table 2 Diamond Core Drill Hole Collar Selected Assays Cs 2O Cs Li 2O Li Rb (%) (calc%) SiO 2 (%) Ta Al PDD , ,536 6, ,241 PDD , ,072 8, ,860 PDD , ,673 10, ,091 PDD , ,368 11, ,848 PDD , ,009 5, ,280 PDD ,199 1, ,856 PDD , , ,177 PDD , ,729 PDD , ,536 PDD , ,697 7, ,259 PDD , ,963 19, ,791 PDD , ,723 15, ,754 PDD , ,622 17, ,762 PDD , ,548 14, ,493 PDD , ,962 7, ,263 PDD ,200 PDD , ,241 12, ,549 PDD ,200 PDD , ,860 4, ,583 PDD ,285 PDD ,600 PDD ,200 PDD ,200 PDD ,700 PDD ,100 PDD ,100 PDD ,500 PDD ,452 PDD ,766 PDD ,884 PDD , ,873 17, ,032 PDD , ,384 17, ,276 PDD ,903 PDD , , ,065 PDD , ,637 PDD , ,685 PDD , ,065 12, ,973 PDD , ,329 6, ,921 PDD , ,923 5, ,328 PDD , ,898 8, ,681 PDD , ,057 8, ,093 PDD ,607 1, ,465 10

11 Hole ID From To Cs 2O Calc% Table 2 Diamond Core Drill Hole Collar Selected Assays Cs 2O Cs Li 2O Li Rb (%) (calc%) SiO 2 (%) Ta Al PDD ,325 PDD ,734 PDD ,379 PDD ,700 PDD ,900 PDD ,800 PDD ,600 PDD ,558 PDD , ,314 15, ,656 PDD , ,395 15, ,654 PDD , ,774 11, ,460 PDD ,280 PDD ,900 PDD ,000 PDD ,400 PDD ,200 PDD , ,145 10, ,407 PDD , ,721 1, ,951 PDD ,800 PDD , ,751 4, ,976 PDD ,100 PDD ,900 PDD , ,139 3, ,000 PDD , ,848 5, ,515 PDD , ,157 4, ,830 PDD ,206 3, ,069 PDD PDD , ,617 14, ,658 PDD , ,256 13, ,281 PDD , ,302 11, ,988 PDD , ,068 8, ,051 PDD , ,114 5, ,682 PDD , ,933 3, ,723 PDD , ,207 4, ,474 PDD , ,494 13, ,872 PDD , ,311 6, ,209 PDD , ,311 2, ,539 PDD , ,455 1, ,707 PDD ,291 1, ,718 PDD ,563 PDD ,740 PDD , ,825 17, ,933 11

12 Hole ID From To Cs 2O Calc% Table 2 Diamond Core Drill Hole Collar Selected Assays Cs 2O Cs Li 2O Li Rb (%) (calc%) SiO 2 (%) Ta Al PDD , ,548 7, ,299 PDD , ,868 14, ,769 PDD , ,677 15, ,630 PDD , ,066 13, ,086 PDD , ,331 13, ,678 PDD ,207 PDD , ,287 14, ,935 PDD , ,245 13, ,921 PDD , ,439 1, ,866 PDD , , ,399 PDD ,500 PDD ,700 PDD ,800 PDD ,200 PDD ,300 PDD , ,847 14, ,619 PDD , ,848 17, ,652 PDD ,389 2, ,572 PDD ,600 PDD ,900 PDD , ,620 6, ,054 PDD , ,483 7, ,721 PDD , ,926 3, ,559 PDD ,210 1, ,399 PDD , ,837 PDD ,621 1, ,190 PDD , , ,687 PDD , , ,435 PDD ,300 PDD , ,715 PDD , ,484 8, ,897 PDD , ,948 6, ,499 PDD , ,848 5, ,294 PDD , ,603 5, ,062 PDD PDD ,069 PDD ,848 PDD , ,266 PDD ,329 PDD ,875 PDD , ,913 5, ,411 PDD ,160 12

13 Hole ID From To Cs 2O Calc% Table 2 Diamond Core Drill Hole Collar Selected Assays Cs 2O Cs Li 2O Li Rb (%) (calc%) SiO 2 (%) Ta Al PDD ,684 PDD ,486 PDD ,281 3, ,979 PDD ,775 1, ,585 PDD ,111 PDD , ,521 PDD ,543 1, ,535 PDD ,539 1, ,740 PDD ,543 PDD , ,560 3, ,666 PDD , ,331 3, ,075 PDD , ,868 PDD , , ,162 PDD , ,770 7, ,435 PDD ,943 1, ,813 PDD ,648 PDD ,000 PDD PDD , ,240 17, ,612 PDD , ,419 19, ,453 PDD , ,005 18, ,004 PDD , ,885 13, ,422 PDD , ,469 13, ,259 PDD , ,111 13, ,654 PDD , ,806 PDD , ,124 6, ,173 PDD , ,192 4, ,196 PDD , ,170 6, ,152 PDD ,641 PDD ,857 PDD , ,809 6, ,434 PDD , ,647 6, ,688 PDD , ,405 6, ,938 PDD ,162 2, ,096 PDD , ,744 PDD , , ,289 PDD ,500 PDD , , ,190 PDD ,800 PDD ,900 PDD ,100 PDD ,400 13

14 Hole ID From To Cs 2O Calc% Table 2 Diamond Core Drill Hole Collar Selected Assays Cs 2O Cs Li 2O Li Rb (%) (calc%) SiO 2 (%) Ta Al PDD , ,196 2, ,525 PDD , ,245 18, ,073 PDD , ,540 15, ,412 PDD , ,130 19, ,801 PDD , ,185 14, ,452 PDD ,670 2, ,764 PDD ,926 3, ,118 PDD ,072 1, ,378 PDD , ,428 PDD , ,796 PDD ,217 1, ,774 PDD ,108 PDD , ,981 16, ,267 PDD , ,208 17, ,606 PDD , ,391 14, ,110 PDD , ,307 18, ,995 PDD , ,950 17, ,408 PDD , ,492 16, ,456 PDD , ,491 10, ,197 PDD ,402 2, ,051 PDD , ,549 18, ,703 PDD ,249 PDD ,788 1, ,333 PDD ,900 PDD , ,136 5, ,095 PDD , ,330 3, ,625 PDD ,417 PDD , ,658 9, ,391 PDD ,813 PDD , ,088 14, ,510 PDD , ,856 9, ,681 PDD , ,765 9, ,685 PDD , ,144 8, ,171 PDD , ,609 PDD , ,401 3, ,997 PDD , ,031 PDD , ,999 PDD , ,151 PDD , ,066 PDD , ,341 PDD ,493 PDD , ,187 14

15 Hole ID From To Cs 2O Calc% Table 2 Diamond Core Drill Hole Collar Selected Assays Cs 2O Cs Li 2O Li Rb (%) (calc%) SiO 2 (%) Ta Al PDD , ,256 PDD , ,319 PDD , , ,699 PDD , ,334 PDD ,216 PDD ,362 1, ,947 PDD , ,931 4, ,484 PDD , ,883 13, ,534 PDD , ,689 17, ,655 PDD , ,016 12, ,868 PDD , ,546 8, ,772 PDD , ,712 8, ,921 PDD , ,332 PDD ,835 1, ,571 PDD , ,218 6, ,552 PDD , ,584 Notes: Selected Assay results derived from chemical analysis by Intertek-Genalysis. The element oxide assays were determined by fused disk - XRF. The element assays were determined by 4 acid digest and ICP analysis. Calculated oxide fields comprise the actual element oxide value when determined, or the oxide value calculated from the elemental value using the following formula: Li * to derive Li2O, Ta by to derive Ta2O5 and Cs by 1.06 to derive Cs2O. Intersections noted are down-hole and do not necessarily represent a true width. 15

16 Section 1 - Sampling Techniques and Data (Criteria in this section apply to all succeeding sections.) Pioneer Dome Project, Sinclair Caesium Prospect. Criteria JORC Code explanation Commentary Sampling techniques Drilling techniques Drill sample recovery Nature and quality of sampling (eg cut Faces, 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. 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. Drill type (eg core, reverse circulation, open-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). 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. HQ Core samples from holes drilled from surface. Industry-standard diamond core drilling, using HQ diamond-set cutting tools. Duplicate samples and Reference Standards were inserted at regular intervals to provide assay quality checks. The standards reported within acceptable limits. Samples are considered fit for purpose, being to detect anomalous metal element occurrences. Half core samples of lengths determined by geology vary in weight. The analytical process for a package of elements specific for exploring LCT pegmatites included digestion by a four-acid digestion with a Mass Spectrometer (MS) determination (Intertek analysis code 4A Li48-MS). Over range samples were re analysed by a sodium peroxide zirconium crucible fusion High Cs-containing samples analysed using lithium borate fusion XRF analysis. HQ standard core drilling. Drill core is measured and compared with the length of core rods in use to ascertain recovery and core loss. Sample recovery is generally excellent for HQ drilling using the equipment described.

17 Criteria JORC Code explanation Commentary Logging Sub-sampling techniques and sample preparation 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. 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, Face, etc) photography. The total length and percentage of the relevant intersections logged. 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. 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. Sample recovery is mostly under the control of the drill operator and is generally influenced by the experience and knowledge of the operator. Sample recovery for core drilling is usually very high. Core measurements enable core recoveries to be calculated and form part of the QA/QC record. Because the sample recoveries are assumed to be high, any possible relationship between sample recovery and grade has not been investigated. Lithological logs exist for these holes in a database. Fields captured include lithology, mineralogy, sulphide abundance and type, alteration, texture, recovery, weathering and colour. Logging has primarily been qualitative. Qualitative litho-geochemistry based on pxrf analyses is used to confirm rock types. Half core is retained in trays for future reference. XRD analysis of selected pulps retained from the chemical analysis may be undertaken once all chemical assays have been received. The entire length of the drill holes was geologically logged. Intervals between 0.5m and 1m are sawn along orientation marks and one side of the core is consistently sampled. The sample collection, cutting and sampling for this style of drilling is considered to be standard industry practise and fit for purpose. The cut core was sampled with the right-hand side of the core always collected for chemical analysis, the orientation line was retained. Reference Material is included at a rate of 1 per 30 samples for all assay submissions. Laboratory quality control samples used and monitored by the laboratory and the company. The sample size is considered appropriate for the style of deposit being sampled. 17

18 Criteria JORC Code explanation Commentary Quality of assay data and laboratory tests Verification of sampling and assaying Location of data points Data spacing and distribution The nature, quality and appropriateness of 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. The verification of significant intersections by 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. Accuracy and quality of surveys used to locate drill holes (collar and down-hole surveys), 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 for reporting of Exploration Results. The sample preparation and assay method used is considered to be standard industry practice and is appropriate for the deposit. Pioneer owns a Bruker S1 Titan 800 handheld XRF instrument which is used to provide the geologist with basic, qualitative litho-geochemistry data only. This data is not considered reportable. Standards and laboratory checks have been assessed. Most of the standards show results within acceptable limits of accuracy, with good precision in most cases. Internal laboratory checks indicate very high levels of precision. Significant intersections are calculated and checked by suitably qualified personnel. No holes have been twinned Pioneer has a digital SQL drilling database where information is stored. The Company uses a range of consultants to load and validate data, and appraise quality control samples. Pioneer has adjusted the elemental lithium (Li), tantalum (Ta) and caesium (Cs) assay results to provide Li2O, Ta2O5 and Cs2O grades. This adjustment is a multiplication of the elemental Li, Ta and Cs assay results by 2.153, and 1.06 to determine Li2O, Ta2O5 and Cs2O grades respectively. The collar locations of the holes have been surveyed by a licenced surveyor using a differential GPS. The new-collar surveys provide very accurate positions for all holes including the RL of each drill collar. MGA94 (Zone 51) Topographic control is by DGPS, carried out by a licensed surveyor. Individual drill hole spacing varies. This drill programme was predominantly drilled on a 10m grid. 18

19 Criteria JORC Code explanation Commentary 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. The data is sufficient dense to conduct the estimation of a mineral resource. The process to produce a mineral resource is in progress. Yes, for the drill intersection summary at the start of this announcement. Orientation of data in relation to geological structure Sample security Audits or reviews Whether the orientation of sampling achieves unbiased sampling of possible 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. The measures taken to ensure sample security. The results of any audits or reviews of sampling techniques and data. The strike of the mineralisation is estimated at to be broadly north south, therefore the angled holes have been usually drilled towards East. Down hole intersections are estimated to closely approximately true widths based on the interpretation of the pegmatite bodies and the orientation of the drilling. Pioneer uses standard industry practices when collecting, transporting and storing samples for analysis. Drilling pulps are retained by Pioneer off site. Sampling techniques for assays have not been specifically audited but follow common practice in the Western Australian exploration industry. The assay data and quality control samples are periodically audited by an independent consultant. 19

20 Section 2 - Reporting of Exploration Results (Criteria listed in the preceding section also apply to this section.) Criteria JORC Code explanation Commentary Mineral tenement and land tenure status Exploration done by other parties 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 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. Acknowledgment and appraisal of exploration by other parties. The drilling reported herein is entirely within M63/665 which is a granted Mining Lease. The tenement is located approximately 40km N of Norseman WA. Pioneer Resources Limited is the registered holder of the tenement and holds a 100% unencumbered interest in all minerals within the tenement. The tenement is on vacant crown land. The Ngadju Native Title Claimant Group has a determined Native Title Claim which covers the Pioneer Dome project. At the time of this Statement M63/665 is in Good Standing. To the best of the Company s knowledge, other than industry standard permits to operate there are no impediments to Pioneer s operations within the tenement. There has been no previous LCT pegmatite exploration on the Pioneer Dome project. Previous mapping by the Western Australian Geological Survey and Western Mining Corporation (WMC) in the 1970 s identified several pegmatite intrusions however these were not systematically explored for Lithium or associated elements. Geology Deposit type, geological setting and style of mineralisation. The Project pegmatites are consistent with records of highly differentiated Lithium Caesium Tantalum (LCT) pegmatite intrusion. This type of pegmatite intrusions are the target intrusions of hard rock lithium deposits. Drill hole Information Data aggregation methods 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, including 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 plus 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. 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. 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. Refer to Appendix 1 of this announcement. Weighted average Cs 2O assays on page 1 of this release are for generally adjacent samples above 5% Cs 2O. Weighted average Li 2O assays on page 1 of this release are for generally adjacent samples above 0.8% Li 2O. Assays in Table 2 are as per the intervals sampled. 20

21 Criteria JORC Code explanation Commentary Relationship between mineralisation widths and intercept lengths Diagrams Balanced reporting Other substantive exploration data Further work The assumptions used for any reporting of metal equivalent values should be clearly stated. 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. 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 ). 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. 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. 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. The nature and scale of planned further work (eg tests for lateral extensions or depth extensions or large-scale step-out drilling). Diagrams clearly highlighting the areas of possible extensions, including the main geological interpretations and future drilling areas, provided this information is not commercially sensitive. The current geological interpretation, based on drilling and mapping, suggests that the true widths approximate the down hole widths. Refer to maps in this report. Comprehensive reporting of drill details has been provided in Appendix 1 of this announcement. All meaningful and material exploration data has been reported. Work that is currently underway or remains outstanding includes; Additional microcline assay results from the completed Diamond drilling Detailed petrography within the anomalous zones Selected XRD to determine the mineralogy Potential additional work includes Metallurgical testing Geological modelling Resource Estimation. Extensional drilling 21