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INFILL DRILLING CONFIRMS CONTINUITY OF HIGH-GRADES AT THE SINCLAIR ZONE CAESIUM DEPOSIT PREPARATIONS FOR MINING ADVANCE

ASX Announcement 19 April 2018 

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 29.61 Cs2O from 37.7m 
• PDD167: 2.68m at 27.11 Cs2O from 40.82m 

and 7.18m at 16.04 Cs2O from 47.88m 

• PDD170: 7.45m at 16.58 Cs2O from 43.6m
• PDD174: 4.30m at 20.89 Cs2O from 43.5m

Lithium mineralisation (petalite and lepidolite), which occurs peripheral to the caesium mineralisation, included:

• PDD161: 25.02 m at 2.14% Li2O from 41.98m 
• PDD163: 16.43 m at 2.27% Li2O from 40.57m 
• PDD164: 16.10 m at 2.64% Li2O from 39.9m
• PDD168: 16.50 m at 1.75% Li2O from 40.5m 
• PDD173: 26.70 m at 1.82% Li2O from 34.3m 
• PDD175: 23.10 m at 1.94% Li2O from 41.9m 
• PDD176: 19.00 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.

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ASSAYS CONFIRM MULTIPLE, WIDESPODUMENE-PEGMATITE INTERSECTIONS MAVIS LAKE LITHIUM PROJECT, ONTARIO, CANADA

ASX Announcement 6 April 2018 

Perth, Western Australia: 6 April 2018:  Pioneer Resources Limited (the "Company" or “Pioneer”) (ASX: PIO), in conjunction with its joint venture partner International Lithium Corp. (“ILC”) (TSX Venture: ILC.V), (together the “Joint Venture”) is pleased to provide the results of a highly successful drilling programme at the Mavis Lake Lithium Project in the province of Ontario, Canada, (Refer ASX announcement 19 February 2018).

STANDOUT INTERSECTION* | MF18-53:  55.25m at 1.04% Li2O from 82.75m

Other intersections* of spodumene-bearing pegmatites returned:

• 
  
• MF18-58:  28.95m at 1.14% Li2O from 116.8m
• MF18-51:  23.30m at 1.09% Li2O from 76.8m
• MF18-52:  13.45m at 1.17% Li2O from 149.95m
• MF18-54:  18.20m at 1.27% Li2O from 94.8m and
• MF18-54:  6.10m at 2.33% Li2O from 139.25
• MF18-55:  12.35m at 1.41% Li2O from 135.14m

DRILLING AT MAVIS LAKE LITHIUM PROJECT

The programme, targeting the Fairservice Pegmatite 6 Prospect, (see Figures 1 and 2 below) consisted of nine diamond core holes for a total of 1,591 metres.

All nine holes intersected significant spodumene mineralisation, usually in the form of multiple wide zones of pegmatite.These results greatly enhance the prospectivity of the Project.

Image 1:MF18-53.   The entire interval, including internal waste, returned 55.25m at 1.04%Li2O from82.75m. Higher grade zonesincluded 25mat 1.12%Li2O from82.70m and13.70m at1.41% Li2Ofrom 122.30m

* Allreported widths are drillhole intersection widths andhave notbeen converted to truewidth. Truewidth isunknown atthis time

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POTASSIUM FELDSPAR DEPOSIT DISCOVERED AT THE SINCLAIR ZONE CAESIUM DEPOSIT

Perth, Western Australia: 21 February 2018: Pioneer Resources Limited (the "Company" or “Pioneer”) (ASX: PIO), is pleased to provide the results from 2 diamond core holes drilled within the Company’s 100%-owned Sinclair Zone Caesium Deposit, located within the Pioneer Dome Project approximately 140km south of Kalgoorlie, Western Australia.

The Company is working towards open pit mining operations to extract the Sinclair Zone Caesium Deposit this year and while doing so, studies have identified that the mono-mineralic potassium feldspar “microcline” dominates the overburden within the proposed Sinclair Zone Caesium Deposit pit.

The final pre-mining drill-out at the Sinclair Zone Caesium Deposit is nearing completion (refer December Quarter 2017 Activities Report released 31 January 2018).  14 diamond core holes have been drilled targeting pollucite and overlying microcline, as well as 4 geotechnical holes drilled adjacent to the proposed pit walls (refer Figure 2).

The Company submitted 82 samples from 2 drill holes, PDD125 and PDD126, which were drilled along the long axis of the microcline deposit.  The analytical technique for microcline requires iron-free sample preparation and an XRF-fusion assay.  Of the samples submitted, 61 have returned analyses consistent with a published A Grade Microcline specification.  This specification is detailed in Table 1 below.

It is noteworthy that microcline has been recorded in over 30 drill holes along the full length of the Sinclair Zone pit, so is well constrained spatially, however the 2 drill holes recorded here-in and the 14 pre-mining drill-out holes are the first to be analysed using the low-iron sample preparation technique.

• PDD125         20m at 11.43% K₂O, 3.14% Na₂O, 18.55% Al₂O₃, 0.034% Fe₂O₃, and 

                                 13m at 11.76% K₂O, 2.77% Na₂O, 18.68% Al₂O₃, 0.020% Fe₂O₃, 

• PDD126         36m at 11.47% K₂O, 2.88% Na₂O, 18.40% Al₂O₃, 0.044% Fe₂O₃, 

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