ASX RELEASE
onlyuse21 JANUARY 2022 ASX CODE: RWD DIRECTORS
Colin McCavana
Chairman
Rod Della Vedova
Non-Executive Director personalMichael Ruane
Executive Director
MANAGEMENT
Bia ca Taveira
Company Secretary
HEAD OFFICE
Reward Minerals Ltd
159 Stirling Highway
Nedlands WA 6009
PO Box 1104
N dlands WA 6909
T: 08 9386 4699
E:admin@rewardminerals.com
W:www.rewardminerals.comFor
OFFICER BASIN POTASH PROJECT: UPDATE ON 2021 DRILLING CAMPAIGN
Summary
- Four additional drill holes (OB005 - OB008) and re-drill of OB004 completed during Q4 of 2021
- K-valuesin Groundwater recovered are generally lower in OB005 - OB008 than in OB001 - OB004 but drilling has provided significant enhancement of Palaeovalley System Concept
- Passive Seismic Geophysical Survey planned to further investigate the Officer Basin Palaeovalley System Concept
Reward Minerals Ltd (Reward, or the Company) provides the following update on its 2021 drilling campaign in the Officer Basin in Western Australia.
Five drill holes were completed between August and December 2021. Two of these were drilled as part of the 2020 Phase 1 program, including a re-drill of OB004 (OB004B) and OB005, which also required a re-drill (OB005B) due to technical issues encountered during drilling.
OB006 - OB008 were subsequently drilled between November and December 2021 as part of the Phase 2 drill program, following receipt of Heritage Clearance in October 2021.
All holes were executed using mud rotary drilling techniques for a total of 1,147 metres.
The purpose of the drilling was to follow up on significant, Potash-rich brine flows encountered previously in holes OB001 - OB004 drilled during 2020 (see ASX Release 27 January 2021).
Locations of drill holes and chemical analyses of brines recovered by airlifting techniques are provided in Tables 1 and 2 respectively. A Location Plan is provided in Figure 1.
Drilling | Easting | Northing | Elevation | Hole | Dip | Azimuth | |
Hole ID | (MGA Zone | (MGA Zone | Depth | ||||
Program | 51) | 51) | (masl) | (m) | (°) | (°) | |
Phase 1 | OB004B | 578125 | 7399201 | 350 | 216 | 90 | 360 |
(2020 - 2021) | OB005B | 583907 | 7408866 | 363 | 276 | 90 | 360 |
Phase 2 | OB006 (MW2) | 580001 | 7407389 | 342 | 231 | 90 | 360 |
OB007 (MW4) | 577900 | 7410454 | 337 | 222 | 90 | 360 | |
(2021) | |||||||
OB008 (MW8) | 571443 | 7416392 | 346 | 202 | 90 | 360 | |
Table 1. Drill Hole Collar information for 2021 drilling at Officer Basin
www.rewardminerals.com
Reward Minerals Ltd
Drilling | Hole | Sample | Ca | K | Mg | Na | SO4 | Cl | Specific | Total | ||||
only | Hole ID | Depth | Depth | Dissolved | ||||||||||
Program | (m) | (m) | (mg/l) | (mg/l) | (mg/l) | (mg/l) | (mg/l) | (mg/l) | Gravity | Ions* | ||||
Phase 1 | OB004B | 216 | 40 | 1525 | 450 | 600 | 46275 | 8100 | 74230 | 1.085 | 131180 | |||
(2020 - | ||||||||||||||
OB005B | 276 | 276 | 113 | 590 | 67 | 1937 | 1770 | 3337 | 1.000 | 7814 | ||||
2021) | ||||||||||||||
OB006 | 32 | 325 | 430 | 292 | 3748 | 3870 | 5190 | 1.006 | 13855 | |||||
231 | ||||||||||||||
219 | 700 | 570 | 96 | 2374 | 3690 | 3320 | 1.003 | 10750 | ||||||
(MW2) | ||||||||||||||
225 | 785 | 500 | 96 | 2166 | 3810 | 3010 | 1.003 | 10367 | ||||||
Phase 2 | OB007 | 39 | 455 | 330 | 464 | 12690 | 4500 | 20650 | 1.023 | 39089 | ||||
(2021) | ||||||||||||||
222 | 222 | 640 | 460 | 658 | 18030 | 6030 | 29120 | 1.034 | 54938 | |||||
(MW4) | ||||||||||||||
196 | 910 | 430 | 668 | 16570 | 5460 | 27610 | 1.028 | 51648 | ||||||
OB008 | 202 | 202 | 900 | 1480 | 1526 | 58300 | 13470 | 92620 | 1.107 | 168296 | ||||
(MW8) | 202 | 940 | 1500 | 1590 | 60560 | 14400 | 97940 | 1.114 | 176930 | |||||
Table 2. Geochemical Assay Results for 2021 drilling at Officer Basin |
use*Total Dissolved Ions numbers quoted correspond to the sum of the ion concentrations of columns 5 - 10 in Table 2. This figure may differ somewhat from Total Dissolved Solid (TDS) figures. To convert K values to SOP multiply by 2.228.
personalResults Summary
The 2021 drilling at Officer Basin confirms the presence of substantial groundwater occurrence in the area/s drilled.
However, generally the tenor of dissolved salts in the groundwater recovered from the drill holes was disappointing, particularly in view of the much higher Total Dissolved Ion (TDI) content of brines encountered in holes OB001 - OB004 during 2020.
While it appears that near-surface groundwater is relatively fresh and that TDI generally increases with depth, the drilling crew experienced great difficulty in isolating the upper, freshwater aquifers from deeper, brine-containing aquifers (of significantly higher salinity). Thus, it is difficult to quantify the dilution effect on deeper groundwater by shallower inflow during the process of pumping and subsequent airlift recovery.
Ground conditions including running sands underlain by dense clay formations made drilling difficult with frequent loss of mud circulation, and drilling equipment getting stuck or lost downhole on a regular basis.
Results of the Officer Basin drilling to-date provide the following indications:
1.
For2.
Drilling of the deeper holes OB001 and OB002 (cored to 419.45m and 705.6m respectively) failed to return solid evaporites containing water-soluble potash salts. Core analysis of OB002 to include formation dating to confirm whether the targeted rock sequences were in fact reached, has yet to be finalised. These dating results may provide a guide as to whether deeper drilling to penetrate the Browne Formations sediments is warranted.
The shallower drilling executed in 2021 in holes OB005 - OB008 and limited groundwater recovery trials support Reward's view that a large palaeovalley system runs from (at least) OB001/OB002 in the east across the Warnturr and Timpirr Lakes corridor to the west, a distance of >40km. The low-density tenor of groundwater in recent holes OB005, OB006 and OB007 suggests that these holes are located on the margins of the postulated palaeovalley aquifer. OB008 demonstrated a significant Potash content in groundwater drawn from the bottom of hole at 202 metres. Potassium analysis of 1.49kg/m3 and sulphate of 13.9kg/m3 are regarded as encouraging (SOP equivalent of 3.3kg/m3 of brine).
2
www.rewardminerals.com
21 January 2022 ASX RELEASE | Reward Minerals Ltd |
Next Steps
As indicated in note 2. above, Reward believes that a substantial water / brine-saturated palaeovalley exists in the area where holes OB001 - OB008 have been drilled to-date.
onlyPassive seismic is a relatively low-cost,non-ground disturbing technique used extensively in Western Australia to define depth of cover, shallow stratigraphy and direction and depth of palaeovalley water and brine resources for mining and other (Potash) operations. Follow-up drilling has confirmed the effectiveness of the method in other regions.
Based on that assumption, Reward proposes to conduct a geophysical survey involving Passive Seismic Surveying, both
across and perpendicular to the postulated flow direction of the palaeovalley. Survey lines will effectively run parallel to Seismic Line N83-1 (see Figure 1).
useTh implementation of the Passive Seismic Survey will require approval from WDLAC and the Martu Traditional Owners in
ord r to gain access to the Warnturr and Timpirr Lake areas which are of Cultural Significance to the Martu and are Registered Sites under the Aboriginal Heritage Act 1972. Reward will seek to discuss access considerations prior to any further planning of geophysical survey activities.
A thorised for release by the Board of Reward Minerals Ltd
For further information please contact: personalMichael Ruane
Director
About Reward
Reward is an ASX-listedadvanced-stage sulphate of potash exploration and development company. Reward's flagship is its 100%- wned Kumpupintil Lake Potash Project, located east of Newman in north-western Western Australia. The Project hosts Australia's largest high-grade brine SOP deposit in a region with the highest evaporation rate. Key environmental approvals are in place and development can commence on completion of final feasibility studies, secondary regulatory approvals and achievement of funding.
Reward completed a detailed, conservative Pre-Feasibility Study which was updated with improved logistics in July 2018. An Indigenous Land Use Agreement is in place with the Martu people, traditional owners of the land upon which Kumpupintil Lake is situated.
Forward-Looking Statements
This document may contain certain "forward-looking statements". When used in this document, the words such as "could", "plan", "estimate", "expect", "intend", "may", "potential", "should", and similar expressions are forward-looking statements. Although Reward believes that the expectations reflected in these forward-looking statements are reasonable, such statements involve risks and
Forunce tainties, and no assurance can be given that actual results will be consistent with these forward-looking statements.
F r a more detailed discussion of such risks and uncertainties, see Reward's other ASX Releases, Presentations and Annual Rep rts. Readers should not place undue reliance on forward-looking statements. Reward does not undertake any obligation to release publicly any revisions to any forward-looking statement to reflect events or circumstances after the date of this ASX Release, or to reflect the occurrence of unanticipated events, except as may be required under applicable securities laws.
Exploration Results - Competent Persons Statement
The information in this report that relates to Exploration Results, Brine Assays and Analyses is based on information compiled by Dr Michael Ruane, a Competent Person who is a Member of The Royal Australian Chemical Institute. Dr Ruane is an Executive Director of Reward Minerals. Dr Ruane 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'. Dr Ruane consents to the inclusion in the report of the matters based on the information in the form and context in which it appears.
3
www.rewardminerals.com
21 January 2022 ASX RELEASE | Reward Minerals Ltd |
For personal use only
Figure 1. Officer Basin executed and planned drill holes as of January 2022, located just 100km east of Reward's JORC-defined
SOP Resource of Kumpupintil Lake.
Note: Officer Basin Tenements are Registered under Kesli Chemicals Pty Ltd, which holds 100% beneficial interest in its
Tenements on behalf of Reward Minerals Ltd.
4
www.rewardminerals.com
21 January 2022 ASX RELEASE | Reward Minerals Ltd |
Appendix 1. JORC Criteria and Commentary
- Sampling Techniques and Data
only | JORC Code explanation | Commentary | |||||||||||||||
Criteria | |||||||||||||||||
Sampling | Nature and quality of sampling (e.g. cut channels, | Groundwater sampling from OB005 - OB008 involved airlifting of | |||||||||||||||
techniques | random chips, or specific specialised industry standard | water at various downhole depths by setting the air inlet hose at | |||||||||||||||
measurement tools appropriate to the minerals under | the selected test horizon down the cased section of hole or inside | ||||||||||||||||
investigation, such as down hole gamma sondes, or | |||||||||||||||||
the drill rod stem. | |||||||||||||||||
handheld XRF instruments, etc.). These examples | |||||||||||||||||
should not be taken as limiting the broad meaning of | The samples were airlifted at regular intervals over a period of | ||||||||||||||||
sampling. | |||||||||||||||||
several hours with monitoring of the specific gravity (SG) of the | |||||||||||||||||
use | Include reference to measures taken to ensure sample | water as delivered from the hole. | |||||||||||||||
representivity and the appropriate calibration of any | Bulk samples were collected from the airlift discharge hose in a | ||||||||||||||||
measurement tools or systems used. | |||||||||||||||||
20-litre bucket. | |||||||||||||||||
Aspects of the determination of mineralisation that are | |||||||||||||||||
Material to the Public Report. | Sub-samples of 250ml were taken from the bulk, labelled and | ||||||||||||||||
In cases where 'industry standard' work has been | delivered to the Perth Office. | ||||||||||||||||
done this would be relatively simple (e.g. 'reverse | Samples of similar Specific Gravity were composited for analysis | ||||||||||||||||
circulation drilling was used to obtain 1 m samples | |||||||||||||||||
by an independent laboratory. | |||||||||||||||||
from which 3 kg was pulverised to produce a 30 g | |||||||||||||||||
charge for fire assay'). In other cases more | Lithological | samples | were collected | nominally | at | 1-metre | |||||||||||
personal | explanation may be required, such as where there is | downhole intervals. These have not been assayed as yet. | |||||||||||||||
coarse gold that has inherent sampling problems. | |||||||||||||||||
Geological | logging | is | ongoing and | is | being completed by a | ||||||||||||
Unusual commodities or mineralisation types (e.g. | |||||||||||||||||
submarine nodules) may warrant disclosure of detailed | |||||||||||||||||
information. | |||||||||||||||||
Drilling | Drill type (e.g. core, reverse circulation, open-hole | Vertical mud rotary drilling was conducted using a Hanjin D&B | |||||||||||||||
techniques | hammer, rotary air blast, auger, Bangka, sonic, etc.) | Multi 35 drilling rig employing tricone and PDC bits. | |||||||||||||||
and details (e.g. core diameter, triple or standard tube, | |||||||||||||||||
depth of diamond tails, face-sampling bit or other type, | No coring was undertaken. | ||||||||||||||||
whether core is oriented and if so, by what method, | |||||||||||||||||
etc.). | |||||||||||||||||
Drill hole completion details are provided in Table 1. | |||||||||||||||||
Drill sample | Method of recording and assessing core and chip | Lithological samples were collected nominally at 1-metre | |||||||||||||||
recovery | sample recoveries and results assessed. | downhole intervals. Samples recovered are for geological logging | |||||||||||||||
and qualitative purposes only. | |||||||||||||||||
Measures taken to maximise sample recovery and | |||||||||||||||||
ensure representative nature of the samples. | All water samples were collected by airlifting. See Sampling | ||||||||||||||||
Whether a relationship exists between sample | Techniques for further information. | ||||||||||||||||
recovery and grade and whether sample bias may | |||||||||||||||||
have occurred due to preferential loss/gain of | |||||||||||||||||
fine/coarse material. | |||||||||||||||||
Geologic | Whether core and chip samples have been | qualified geologist. | |||||||||||||||
Logging | geologically and geotechnically logged to a level of | ||||||||||||||||
detail to support appropriate Mineral Resource | |||||||||||||||||
For | All lithological samples | collected during | drilling are qualitatively | ||||||||||||||
estimation, mining studies and metallurgical studies. | |||||||||||||||||
logged at nominal 1-metre intervals. | |||||||||||||||||
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 | 250ml sub-samples were taken from the airlifted water samples. | |||||||||||||||
or all core taken. | |||||||||||||||||
techniques | Upon | receipt of | the | samples | at | the Company's | in-house | ||||||||||
If non-core, whether riffled, tube sampled, rotary split, | |||||||||||||||||
and sample | laboratory, | samples were sorted | and | reconciled | against the | ||||||||||||
etc. and whether sampled wet or dry. | |||||||||||||||||
record generated on-site. | |||||||||||||||||
preparation | For all sample types, the nature, quality and | High Total Dissolved Solids (TDS) solutions were diluted by 50x | |||||||||||||||
appropriateness of the sample preparation technique. | |||||||||||||||||
prior | to dispatch | to an independent | laboratory. | Results are | |||||||||||||
Quality control procedures adopted for all sub- | |||||||||||||||||
corrected at the laboratory to account for the advised dilution (if | |||||||||||||||||
sampling stages to maximise representivity of | |||||||||||||||||
dilution has been carried out). | |||||||||||||||||
samples. | |||||||||||||||||
Measures taken to ensure that the sampling is | See Sampling Techniques above for further information. | ||||||||||||||||
5 | www.rewardminerals.com | ||||||||||||||||
This is an excerpt of the original content. To continue reading it, access the original document here.
Attachments
- Original Link
- Original Document
- Permalink
Disclaimer
Reward Minerals Ltd. published this content on 21 January 2022 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 21 January 2022 08:21:08 UTC.