Announcement PDF 13 November 2023 51% INCREASE IN ALPHA RESOURCE SUBSTANTIALLY EXPANDS PROJECT SCALE AND POTENTIAL Significantly upgraded Mineral Resource sets a strong foundation for the upcoming PreFeasibility Study (PFS) as Greenvale makes strong progress towards its goal of becoming Australia’s only end-to-end, domestic supplier of sustainable bituminous products. Highlights: • Updated JORC Mineral Resource Estimate (MRE) completed for the Alpha Torbanite Project in Queensland by SRK Consulting. • Updated Inferred Resource of 28Mt of Torbanite and Cannelite. • This represents a 51% increase on the maiden 18.6Mt MRE (March 2022). • Mineral Resource Estimate includes 4.3Mt of Torbanite. • Increase to volumetrics with 27.7 million barrels of synthetic oil equivalent – up 30% on the previously stated MRE. • Potential to further expand the Resource both down-dip, as well as on the adjacent EPM 27718 with further drilling. Summary Greenvale Energy Limited (ASX: GRV, “Greenvale” or “the Company”) is pleased to advise that it has taken another key step towards the commercial development of its flagship, 100%owned, Alpha Torbanite Project in Queensland with the completion of an updated JORC Mineral Resource Estimate (MRE) for the deposit. The updated MRE sees a 9.4Mt increase in the total dry tonnes of the deposit, up from 18.6Mt in the maiden 2022 to 28Mt of combined cannelite and torbanite. This represents a significant 51% increase in the total size of the Inferred Resource and reinforces the scale and potential of the Alpha deposit. The synthetic oil equivalency of the deposit has also seen a noticeable improvement, adding 6.4 million barrels for a total of 27.7 million barrels of synthetic oil equivalent. It is also important to note that the updated MRE synthetic oil equivalency has been calculated utilising yield estimations from the standardised Modified Fischer Assay (MFA) results reported back in December 2021. REGISTERED OFFICE: Level 5, Suite 6 189 Kent Street, Sydney, New South Wales 2000 | GPO Box 2733, Sydney NSW 2001 +61 2 8046 2799 | admin@greenvaleenergy.com.au | www.greenvaleenergy.com.au ABN 54 000 743 555 Yield results and subsequent synthetic oil equivalency estimations are likely to improve following completion of the final stage of liquefaction testing, currently being undertaken by Monash University. The completion of Test Program Four will not only allow for a potential improvement in yields, but also an increase in the confidence level of the MRE from Inferred to Indicated for inclusion in the upcoming Pre-Feasibility Study (PFS). Overall, the substantial upgrade in the MRE is a compelling result. The data from the updated MRE will now be utilised in the final delivery of the PFS and, with the increase in the overall size of the deposit, will potentially enhance the overall economic profile of the project. A modest decline in the total tonnage of torbanite has been observed. However, as evidenced by the results from liquefaction Test Program Three (see ASX Announcement dated 17 May 2023), the Company and its technical advisors, Procom, have been able to achieve much greater yields from the cannelite than first observed in the initial MFA results. Holistically, it is expected that improvements in the processing of the cannelite will negate any observed decrease in the total estimated tonnes of torbanite at this stage of the project. There is also scope for further increases in the total torbanite Resource with further extensional drilling into EPM 27718. Greenvale’s CEO, Mark Turner, stated: “This is a fantastic outcome for our shareholders and a very exciting milestone for the Company in our journey to develop the Alpha Project. The completion of the updated MRE ticks another major box towards the completion of the PFS. “The significant improvement in the scale of the Inferred Resource is extremely positive and is expected to improve further when combined with the results from the final liquefaction test program. “While we are all very pleased with the 51% increase in the MRE, we know that there is still work to be done and we look forward to further updating the market on the Alpha Project and the advancements of our partners Monash, Technix and Lycella in the coming weeks.” Local Geology of the Alpha Deposit The Alpha Torbanite deposit consists of two seams, namely an Upper and Lower Seam which sit at the base of the Colinlea Sandstone. The Lower Seam is equivalent to the ‘E’ seam within the Colinlea Sandstone within the Galilee Basin. The seam structure of the deposit is simple with the two seams – the Upper and Lower Seam – having an average interburden of 16 metres. The interval between the two seams is dominantly quartzose to lithic sandstone with minor conglomerate, siltstone and claystone (Figure 1). The Upper Seam is classified as cannelite and has an average thickness of ~1m and the Lower Seam has an average thickness of ~2m. The Lower Seam is the main oil-yielding unit of the deposit. It consists of two main types of oil shale namely cannelite and torbanite, which is olive-grey to olive-black and is finely laminated. The torbanite is lenticular in shape and has a variable thickness. GREENVALE ENERGY LIMITED 2 The Lower Seam can generally be split into three plies, as described below: • L1 – comprising a relatively clean cannelite interval. • LT – comprising the main torbanite interval, including coal bands. • L2 – comprising a relatively clean cannelite interval. Figure 1: Summary of the seam geology within MDL330. Alpha Phase 2 Drilling Program The Company completed the Phase 2 drilling program at the Alpha Project in early October (see ASX announcement, 2 October 2023). The core drilling programme comprised a total of 20 HQ core holes for a combined 1,053.5m of drilling. The program involved the acquisition of 16 cores targeting the Upper & Lower Seams and four cores targeting just the Lower Seam. All core hole locations have been geophysically logged with wireline tools providing down-hole gamma, density and verticality surveys. The 15-hole chip reconnaissance drilling program which was planned to facilitate the delineation of potential extensions of the Resource outside the geological model area has been rescheduled to take place next year. It is hoped that this program will improve on the reported MRE results and further boost the potential economics of the project. GREENVALE ENERGY LIMITED 3 Figure 2: Alpha drill program hole locations from the recently completed field program. Alpha JORC Mineral Resource The updated JORC Mineral Resource Estimate for the Alpha Deposit is set out in Table 1 and Table 2 below, with the Inferred Resource Area shown in Figure 2: Table 1: MDL 330 Inferred Mineral Resource Estimate by seam and ply unit (plus % +/- from maiden MRE) Seam /Ply Area (m2) Volume (cu m) Waste Thickness (m) Waste Volume (bc m) Tonnes % +/(Air Dried) (Air Dried) Tonnes (Dry) Tonnes (In Situ) U 5,199,146 5,409,700 21 181,383,104 6,491,640 +97% 6,653,931 6,437,543 L1 9,056,464 10,548,503 16 142,970,480 12,995,530 +64% 13,291,114 12,869,174 LT 6,774,137 3,635,190 0 157,694 4,301,324 -6.4% 4,325,876 4,289,524 L2 8,684,433 3,465,159 0 41,993 4,267,732 +49% 4,366,100 4,192,842 Total 28,056,227 +51% 28,637,021 27,789,083 The Mineral Resources were estimated for each of the modelled plies for which there are reasonable prospects for economic extraction. Mineral Resources are limited to the area within MDL 330 and do not, as previously stated, allow for any extension of the deposit into the Company’s surrounding exploration permit, EPM27718. GREENVALE ENERGY LIMITED 4 Table 2: MDL 330 preliminary volumetrics for Mineral Resource estimate Seam /Ply Inferred Dry Tonnes (Mt) % of Total Synthetic Oil (MMboe) % of Total Oil Yield LTOM No. of Drill Holes U 6.7 23% 4.4 16% 105 2 L1 13.3 46% 8.7 31% 104 4 LT 4.3 15% 10.7 39% 395 4 L2 4.4 15% 3.8 14% 140 4 Total 28.6 100% 27.7 100% 154 6 Figure 3: Inferred Resource Area at Alpha Torbanite Project, QLD. GREENVALE ENERGY LIMITED 5 Mineral Resources have been estimated for Upper and Lower seams (U, L1, LT, L2). Points of Observation for determining cannel coal and torbanite thickness and continuity include cored seam intersections, with geophysical wireline log. The up-dip (northern and northeastern) limits of the Inferred Resource were defined by the modelled base of weathering. An improved topographic surface model obtained from airborne LiDAR acquired in 2022 has changed the projected base of weathering in the northern section of the deposit where terrain is more variable. The down-dip (western, southern and southeastern) extent of the inferred resource was limited to a maximum open cut mining depth of 60 m to the floor of the Lower Seam and to the tenement boundaries of MDL330. The cannel coal and torbanite lens Resource tonnage calculations were based on the bulk density model for the coal seam on an in-situ basis. The modelled laboratory air dried bulk density data for the cannel coal and torbanite units was used to calculate air dried tonnages and was subsequently adjusted to an in-situ moisture basis using the Preston and Sanders (1993) calculation. As in-situ moisture cannot be measured directly, an assumed in situ moisture of 14% was used for the Alpha cannel coal, based on an air-dried moisture regression equation developed by Fletcher and Sanders (2003). The resultant in-situ moisture for the sampled cannel coal seams typically equates to the air-dried moisture of 9.4%. A lower in-situ moisture of 6% was assumed for the torbanite lens. Due to its finer pore structure, lack of cleat and resultant lower air-dried moisture content (av. 5.1% ad) compared with the cannel coal plies. No torbanite or cannel coal quality limits/grade cut-offs were applied to the MRE and the Resource is considered amenable to open cut mining methods. Authorised for release: This announcement has been approved by the Board of Greenvale for release. For further details, contact: Mark Turner CEO Mobile: 0459 519 999 Media Inquiries: Nicholas Read Read Corporate Nicholas@readcorporate.com.au Mobile: 0419 929 046 GREENVALE ENERGY LIMITED 6 Competent Person’s Statement: The information in this report that relates to Exploration Results is based on information compiled by Mr. Carl D’Silva, a Competent Person who is a Member of The Australasian Institute of Mining and Metallurgy (Member number 333432). Mr. D’Silva is a full-time employee of SRK Consulting (Australasia) Pty Ltd, a group engaged by the Company in a consulting capacity. Mr D’Silva 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 D’Silva consents to the inclusion in the report of the matters based on his information in the form and context in which it appears GREENVALE ENERGY LIMITED 7 Section 1 Sampling Techniques and Data (Criteria in this section apply to all succeeding sections.) Criteria JORC Code explanation Sampling techniques  Nature and quality of sampling (e.g., cut channels, random 2023 partly cored hole drilling program chips, or specific specialised industry standard  20 partly cored holes drilled (HQ3 – 61.1 mm diameter), on a nominal measurement tools appropriate to the minerals under 250 m × 250 m grid, for the purpose of obtaining torbanite and cannel coal investigation, such as downhole gamma sondes, or quality samples from the Upper and Lower seams (total drilling 1,058.7 m). The handheld XRF instruments, etc.). These examples should drilling includes 20 new holes and 1 redrill. not be taken as limiting the broad meaning of sampling.  The core was briefly logged on surface, before being cut into variable lengths  Include reference to measures taken to ensure sample with the core preserved in PVC splits and wrapped plastic and refrigerated on representivity and the appropriate calibration of any site. All samples were transported to ALS Coal Laboratories, Richlands, on measurement tools or systems used. completion of the coring program for the follow-up assay program.  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 (e.g., ‘reverse circulation drilling was used to obtain 1 m sample 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 (e.g., submarine nodules) may warrant disclosure of detailed information. Drilling techniques  Drill type (e.g., core, reverse circulation, open-hole hammer, rotary air blast, auger, Bangka, sonic, etc.) and details (e.g., 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.). GREENVALE ENERGY LIMITED Commentary 2023 partly cored hole drilling program  All core holes were drilled vertically from surface using a hammer bit until the coring point was reached.  Rods were then pulled and a HQ3 (96 mm) core barrel was run into the drill hole.  A total of ~464 m of HQ3 core was acquired during the program.  The partly cored program drill hole depths ranged from 15.3 m to 88.8 m, averaging approximately 50.4 m in depth. 8 Criteria JORC Code explanation Drill sample recovery  Method of recording and assessing core and chip sample  Chip samples were collected at approximately 1 m intervals. recoveries and results assessed.  All chip samples were geologically logged and photographed.  Measures taken to maximise sample recovery and ensure  All drill samples were collected and stored in sample trays at a Greenvale representative nature of the samples. Energy storage facility.  Whether a relationship exists between sample recovery and  Core recovery was good, and samples are representative of the seams. grade and whether sample bias may have occurred due to  Poor mechanical state was noted in some holes due to ground conditions. The preferential loss/gain of fine/coarse material. upper ply of Lower Seam (L1) had broken and fragmented core in some drill holes. However, core recovery from these holes was still good.  Xenith Consulting supervised the field acquisition program under the technical guidance of Greenvale personnel.  All core was measured, geologically logged and photographed.  The core on-site was cut into variable lengths with the core preserved in PVC splits and wrapped in plastic and refrigerated on site and preserved to avoid oxidation of torbanite and cannel coal and to ensure a chain of custody from the field to the laboratory.  Due to the good core recovery, no relationship exists between sample recovery and torbanite and cannel coal quality results. It is highly unlikely that any sample bias has occurred. 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. GREENVALE ENERGY LIMITED Commentary  Chip samples were collected every metre, geologically logged and photographed.  All core was collected, measured, geologically logged and photographed.  All drill holes have been geophysically logged with the minimum suite of tools run including Density, Calliper, Verticality/Deviation and Gamma.  The calibration of the geophysical tools was conducted by the geophysical logging company engaged in the project at the time. 9 Criteria JORC Code explanation Sub-sampling techniques  If core, whether cut or sawn and whether quarter, half or all  Chip samples were recovered from each drill hole at 1 m intervals for core taken. lithological logging, but no laboratory analysis of the samples was undertaken.  If non-core, whether riffled, tube sampled, rotary split, etc.  Detailed core logging of the core and marking of sample intervals occurred at and whether sampled wet or dry. the ALS Coal Laboratories, Richlands, by experienced SRK personnel.  For all sample types, the nature, quality and  The core was then sampled into plies crushed and prepared for laboratory appropriateness of the sample preparation technique. analysis as per Australian Standards.  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. and sample preparation Quality of assay data and laboratory tests  The nature, quality and appropriateness of the assaying and  Laboratory analysis will be undertaken on the core samples from the partly laboratory procedures used and whether the technique is cored holes.  ALS Coal Laboratories, Richlands, complies with Australian Standards for all considered partial or total.  For geophysical tools, spectrometers, handheld XRF torbanite and coal quality tests and is certified by the National Association of instruments, etc., the parameters used in determining the Testing Authorities (NATA) in Australia. analysis including instrument make and model, reading times, calibrations factors applied and their derivation, etc.  Nature of quality control procedures adopted (e.g. standards, blanks, duplicates, external laboratory checks) and whether acceptable levels of accuracy (i.e. lack of bias) and precision have been established. Verification of sampling and  The verification of significant intersections by either assaying GREENVALE Commentary 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. ENERGY LIMITED  Torbanite and cannel coal quality results were verified by experienced SRK personnel before inclusion in the geological model and resource estimate. 10 Criteria JORC Code explanation Commentary Location of data points  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.  All holes were professionally surveyed by Precise Positioning Solutions Pty Ltd.  The origin of the survey was based on the calculated site base station coordinates.  All surveyed coordinates are recorded in Map Grid of Australia 1994 (MGA94) Zone 56 using the GDA datum.  A topographic surface model was constructed using satellite data (SRTM) and drill hole collar data.  A draft topographic surface was developed from SRTM data contoured at 2 m intervals and triangulated to develop a draft model topographic surface (TOPO).  Analysis of surveyed drill hole collar RLs versus the TOPO grid indicated that the TOPO grid was on average 5.51 m higher than the drill hole collar value.  A revised topography grid was created (TOPS) by subtracting 5.51 m from the TOPO grid.  The TOPS grid has been used as the model topographic surface from which the base of weathering grid was subsequently developed.  Confidence in the topographic model is considered low – acquisition of high resolution topographic survey data is recommended to support detailed mine planning investigations. Data spacing and  Data spacing for reporting of Exploration Results.  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.  Stratigraphic drilling is on a nominal grid of 500 m × 500 m.  Partly cored holes are on a nominal grid of 250 m × 250 m.  However, the open holes do not support an assessment of the torbanite lens within Lower Seam. This unit cannot be accurately determined in chip samples or readily distinguished in the downhole wireline logs (due the similar density of the coal and torbanite lens).  The density and distribution of drill holes supports a reasonable level of confidence in the depth and thickness of the Upper and Lower seams across the MDL area. distribution GREENVALE ENERGY LIMITED 11 Criteria JORC Code explanation Commentary Orientation of data in  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.  All drill holes were drilled at 90° to the surface and are assumed to be vertical.  Downhole verticality survey is available for all drill holes.  Seam intercepts are recorded on a downhole basis.  Downhole geophysical logs were used to confirm the seam intercepts and thicknesses.  As the deposit is gently dipping and drill holes are generally shallow, the downhole seam thickness will approximate the true thickness of the coal. Sample security  The measures taken to ensure sample security.  All chip samples are secured in a Greenvale facility.  All core samples are secured at ALS Coal Laboratories in Richlands. Audits or reviews  The results of any audits or reviews of sampling techniques and data.  A logging and sampling procedure was developed by SRK.  The Competent Person is adequately satisfied that sampling techniques and procedures have been followed. relation to geological structure GREENVALE ENERGY LIMITED 12 Section 2 Reporting of Exploration Results (Criteria listed in section 1 also apply to this section.) Criteria JORC Code explanation Commentary Mineral tenement and land  Type, reference name/number, location and ownership tenure status  MDL 330 is held by Alpha Resources Pty Ltd, a subsidiary of Greenvale Energy including agreements or material issues with third parties Limited. MDL 330 was first granted on 1 February 2002. An application for a such as joint ventures, partnerships, overriding royalties, renewal for an additional 5-year term was submitted in July 2021 and approved in native title interests, historical sites, wilderness or national July 2022. The current 5-year term expires on 31 January 2027.  MDL 330 covers an area of 1,904.5 ha. 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. Exploration done by other  Acknowledgment and appraisal of exploration by other parties parties.  Historically (since the late1930s), the title has been held by a number of other parties.  The title has been held by Alpha Resources Limited since 2002.  GREENVALE ENERGY LIMITED Asset name Licence holder License type Date Anderson H Anderson EPM 134 1939 Anderson & other H Anderson & others EPM 137 1940 Anderson H Anderson ML 90-95 1941–42 IMC Alpha International Mining Corporation EPM 2240 1979–82 EPM 2203 1978–85 Alpha Oil Shale Project Greenvale Mining & Esperance Minerals Alpha Torbanite Project Alpha Resources Limited EPM 4023 1985–96 MDL 211 1996–2001 MDL 330 2002 to present 13 Criteria JORC Code explanation Commentary Geology  Deposit type, geological setting and style of mineralisation.  The Alpha deposit lies within the axis of the Glen Avon Syncline, a southwest plunging fold structure that occurs on the eastern flank of the Galilee Basin.  The deposit is part of the Permian Colinlea Sandstone, which contains 150 m of cross-bedded sandstones with minor conglomerates, siltstones and mudstones.  The geology of the deposit consists of an Upper and Lower seam of cannel coal with a torbanite lens present in the lower seam.  The Colinlea Sandstone is thought to be a lower delta plain deposit with the coal deposited in swamps and shallow lakes in this near shore environment. The torbanite is thought to have been deposited from algae in a lacustrine environment when water entering the system held little sediment or organic material. Drill hole Information  A summary of all information material to the  A detailed list of the drill holes including downhole depths and seam intersects understanding of the exploration results including a are shown in Table 1-1 and Table 1-2. tabulation of the following information for all Material drill  Geophysical deviation logs (verticality) are available for all holes.  All drill holes have been surveyed. holes:  easting and northing of the drill hole collar  The verticality data for all deeper holes have been loaded and the holes were  elevation or RL (Reduced Level – elevation above sea level modelled accounting for any inclination. in metres) of the drill hole collar  dip and azimuth of the hole  downhole length and interception depth  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. GREENVALE ENERGY LIMITED 14 Criteria JORC Code explanation Commentary Data aggregation methods  In reporting Exploration Results, weighting averaging  Torbanite and cannel coal were treated separately and not aggregated. Relationship between  All drill holes were drilled at 90° to the surface and are assumed to be vertical.  Downhole verticality survey is available for all drill holes.  Seam intercepts are recorded on a downhole basis.  Downhole geophysical logs were used to confirm the seam intercepts and thicknesses.  As the deposit is gently dipping and drill holes are generally shallow, the downhole seam thickness will approximate the true thickness of the coal. techniques, maximum and/or minimum grade truncations (e.g. 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.  The assumptions used for any reporting of metal equivalent values should be clearly stated. mineralisation widths and intercept lengths  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 downhole lengths are reported, there should be a clear statement to this effect (e.g. ‘down hole length, true width not known’). Diagrams  Appropriate maps and sections (with scales) and  All appropriate diagrams are contained in the report. 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. Balanced reporting  Where comprehensive reporting of all Exploration Results is not practicable, representative reporting of both low and high grades and/or widths should be practiced avoiding misleading reporting of Exploration Results. GREENVALE ENERGY LIMITED  All available exploration data for the Alpha Torbanite area has been collated and reported.  This release describes all relevant information. 15 Criteria JORC Code explanation Other substantive  Other exploration data, if meaningful and material, should  The updated interpretation is predominantly based on the 2023 and 2021 drilling be reported including (but not limited to): geological results.  Limited historical drill hole information was used to supplement the 2023 and observations; geophysical survey results; geochemical 2021 drilling and support the continuity of the Upper and Lower seams outside survey results; bulk samples – size and method of the bounds of the MDL area. treatment; metallurgical test results; bulk density, groundwater, geotechnical and rock characteristics; potential deleterious or contaminating substances. exploration data Further work GREENVALE  The nature and scale of planned further work (e.g. 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. ENERGY LIMITED Commentary  The updated geological model has enabled a more robust interpretation of the deposit structure, and the limits of the torbanite lens.  The geological model will be used support the planning and execution of a core drilling program to target down-dip areas to better define the limits of the torbanite lens in Lower Seam.  Additional core drilling is also recommended in the northern sector to provide higher confidence in the modelled subcrop of Lower Seam