Announcement PDF ASX Announcement Released 12 August 2026 ASX:I88 Canadian Exploration Update: Exploration Momentum Builds Across Infini's Canadian Uranium Portfolio ► Portland Creek field program completed, with 465 geological stations and ~283 km of ground traverses confirming numerous airborne radiometric anomalies, with peak spectrometer readings of 7,100 cps, 8,800 cps and 9,400 cps against background of 500-800 cps. ► Strongest radiometric responses at Portland Creek consistently occur within fractured and bleached granite, leucogranite veins and sericitic fault gouge, with pXRF screening up to ~2,800 ppm U, supporting the structurally controlled hydrothermal uranium exploration model ahead of Phase 3 drilling. ► Petrographic analysis at Portland Creek independently confirms the fracture-controlled sericite-chlorite- epidote-hematite alteration assemblage observed in the field, supporting the structural model; 86 rock samples submitted for laboratory assay. ► Preparations well advanced for the 2026 Portland Creek exploration program comprising diamond drilling and additional fieldwork, alongside a planned trenching program across multiple targets including the previously reported high-grade uranium-in-soil anomaly at the Falls Lake Prospect (peak result of 74,997 ppm (7.5%) U₃O₈) to investigate its potential bedrock source. ► Multiple near-term catalysts ahead: Portland Creek rock chip assays and the ~5,000 m Phase 3 drilling program commencing Q3 CY2026, and Reynolds-Reitenbach maiden drilling assays expected late Q3 CY2026. To learn more about this announcement and watch a video update from our CEO, Rohan Bone, click here. Infini Resources Limited (ASX:I88) (“Infini” or the “Company”) is pleased to provide an exploration update across its Canadian uranium portfolio, including initial outcomes from the 2026 field program at the Portland Creek Uranium Project in Newfoundland and the completion of the maiden diamond drilling program at the Reynolds Lake and Reitenbach Lake Uranium Projects on the eastern margin of the Athabasca Basin, Saskatchewan. Infini’s Chief Executive Officer, Rohan Bone, said: “This has been a period of strong technical progress across our Canadian uranium portfolio. At Portland Creek, the field program has delivered exactly what it was designed to do. Our field crews systematically assessed the priority airborne anomalies and confirmed strong radiometric responses on the ground, consistently within the fractured, altered and structurally prepared settings our geological model identified. With high uranium readings from portable XRF screening, supportive petrography and 86 samples at the laboratory, we move into Phase 3 targeting with a sharper, increasingly de-risked exploration model ahead of drilling and trenching commencing in Q3. At Reynolds and Reitenbach, our maiden drilling program has achieved its objective of providing the first subsurface test of the project's system-scale potential, intersecting reactivated graphitic structures and hydrothermal alteration of the style that hosts uranium deposits along the eastern margin of the Athabasca Basin. With assays pending from both projects and Phase 3 drilling at Portland Creek approaching, Infini has a strong pipeline of catalysts through the remainder of 2026.” Portland Creek field program outcomes The helicopter-supported program involved mapping, prospecting and radiometric assessment of priority targets across the project. A total of 465 geological observation stations were recorded, supported by continuous radiometric profiling (more than 51,000 measurement points) along approximately 283 km of ground traverses. Canadian Exploration Update: Exploration Momentum Builds Across Infini's Canadian Uranium Portfolio ASX:I88 Ground radiometric surveying using a handheld gamma-ray spectrometer (RS-125) confirmed the presence and tenor of numerous airborne radiometric anomalies. All readings were recorded in total-count mode directly on outcrop, providing a measure of in-situ radioactivity rather than of individual rock samples. Against typical host-rock background of 500-800 cps, corridor-scale elevated zones commonly returned 1,300-2,700 cps, with multiple stations exceeding 3,000 cps and discrete peak readings of 7,100 cps, 8,800 cps and 9,400 cps. Total-count readings are an indicative exploration guide only and are not a measure of uranium mineralisation or grade (refer to the Cautionary Statement). The distribution of elevated responses is geologically informative. The strongest readings are consistently localised within fractured and bleached granite, leucogranite veins and sericitic fault gouge, rather than being uniformly distributed through the host granite. This spatial association of elevated radioactivity with brittle structures and hydrothermal alteration reinforces the interpretation of a structurally controlled hydrothermal system and is consistent with observations from the Phase 1 and Phase 2 drill programs. Portable XRF screening of identified elevated outcrops returned uranium values of up to approximately 2,800 ppm U (average of multiple readings) at a fault-gouge locality in the south-east of the property, with additional readings of approximately 500 ppm and 1,000 ppm U elsewhere. Uranium is associated with As-Pb-Cu pathfinder elements at these localities. Petrographic analysis of representative altered granite samples independently confirms the fracture-controlled sericite-chlorite-epidote-hematite alteration assemblage observed in the field, with follow-up SEM-EDS mineralogical work underway. A total of 86 rock samples have been submitted for laboratory analysis, with assay results expected in Q3 CY2026, subject to any changes in laboratory processing schedules. Preparations are well advanced for the 2026 Portland Creek exploration program, comprising diamond drilling and additional fieldwork alongside a planned trenching program across multiple targets. Trenching is designed to expose bedrock beneath areas of shallow cover, targeting locations where surface geochemical and radiometric anomalism coincides with interpreted fault structures and magnetic anomalism defined by the recent airborne geophysical surveys. Priority targets include the previously reported high-grade uranium-in-soil anomaly at the Falls Lake Prospect (peak result of 74,997 ppm (7.5%) U₃O₈), where trenching will investigate the potential source of the anomaly. Trenching will be undertaken in parallel with the Phase 3 diamond drilling program, providing direct bedrock sampling of near-surface targets while drilling tests interpreted structural corridors at depth. Next steps at Portland Creek include: • Receipt and interpretation of laboratory assay results from the 86-sample rock chip program, expected Q3 CY2026, subject to any changes in laboratory processing schedules. • Integration of field observations, structural data and geochemistry with the airborne magnetic, EM and radiometric datasets to finalise and rank Phase 3 drill targets. • Completion of logistics for the ~5,000 m Phase 3 diamond drilling program, scheduled to commence in Q3 CY2026. • Commencement of a trenching program across multiple targets, including the Falls Lake Prospect, to test for the source of high-grade uranium-in-soil anomalism. Cautionary Statement The Company has identified potential uranium mineralisation in the field by using hand held pXRF technology to analyse rock chip samples in real time. This allows for immediate on-site decisions to be made to adjust prospecting strategies. While pXRF readings provide a useful indication of mineral content and approximate grades, they are not a substitute for laboratory-derived assay grades and will not be used in any resource estimation. All samples were sent to an independent laboratory for accurate analysis, with assay results expected Q3 CY2026, subject to any changes in laboratory processing schedules. Portable pXRF results reported are considered semi-quantitative; as such, results from pXRF analysis are stated as indicative only, provide confirmation that mineralisation is present; however, they may not be representative of elemental concentration within the material sampled and are preliminary to subsequent confirmation (or otherwise) by geochemical laboratory analysis. Results of pXRF analyses are included for reference, and laboratory assays will be provided when these become available. Limitations of pXRF readings include: very small analysis window, possible inhomogeneous distribution of mineralisation, analytical penetration depth, possible effects from irregular rock surfaces. Results are not considered to be entirely representative of the rock samples, as the analyses were made of what were interpreted to be areas in outcrop with potential Canadian Exploration Update: Exploration Momentum Builds Across Infini's Canadian Uranium Portfolio ASX:I88 to be uranium. The analyses were carried out on outcrop and not ground powders. The pXRF is calibrated periodically against prepared standards. The samples that are the subject of this report were submitted for laboratory assay and some variation from the results presented herein should be expected. Caution should be exercised until the official assay laboratory results have been received. While these preliminary results provide compelling evidence of mineralisation, the Company notes that assay confirmation remains pending and further exploration is required to determine the continuity and thickness of any mineralised zones, which will be critical in defining the economic potential of the mineralisation. Ground radiometric measurements reported in this announcement were collected using a handheld RS-125 gamma-ray spectrometer operated in total-count mode, with readings taken directly on outcrop. Total-count readings measure combined gamma radiation derived from the uranium, thorium and potassium decay series and cannot be attributed to any single element. Elevated total-count responses may therefore reflect thorium or potassium enrichment, or a combination of sources, rather than uranium alone, and cannot be interpreted as evidence of uranium mineralisation or as an indication of uranium grade. Readings are point measurements of in-situ radioactivity at the rock surface and are influenced by factors including the geometry and orientation of the measurement surface, rock surface condition, moisture, vegetation and weathering, and the depth of investigation of the instrument, which is limited to the near-surface. Individual peak readings may represent discrete, localised responses and should not be taken to imply that elevated radioactivity extends over a broader area, at depth, or with any continuity. The spectrometer is operated and calibrated in accordance with manufacturer specifications; however, no radiometric data reported in this announcement have been converted to equivalent uranium (eU) concentrations or otherwise quantified. Total-count spectrometer readings are used by the Company solely as an exploration targeting and prospecting guide, and all determinations of uranium content remain subject to laboratory assay. Reynolds Lake and Reitenbach Lake drilling program complete Infini has successfully completed the first-ever diamond drilling program at the Reynolds Lake and Reitenbach Lake Uranium Projects, comprising 16 drillholes for a total of 3,314m. The maiden program provides the initial subsurface test of the Company’s system‑scale exploration model on the eastern margin of the Athabasca Basin, delivering valuable information on the continuity and nature of graphitic horizons, the distribution of brittle structures and alteration, and the relationship between surface geochemical anomalism and the underlying basement geology. Drilling focused on systematically testing high-priority zones where multiple mineralisation vectors coincide, including: • EM conductors interpreted to represent graphitic or sulphide-rich horizons that may be interpreted as faults; • Magnetic lows associated with alteration and/or structurally disrupted basement rocks; • Elevated uranium geochemical anomalism from previous rock chip and soil sampling; and, • Structural complexity including shear zones, fault intersections and deformation corridors, as interpreted from geophysical data. Initial geological observations have confirmed prospective basement lithologies, including paragneiss, graphitic schist, graphitic gouge and orthogneiss. Drilling also intersected structurally disrupted intervals characterised by brittle faulting, brecciation, fracturing and local shear development along several targeted conductive trends. In a number of holes, graphitic and structurally prepared intervals are associated with hydrothermal alteration assemblages comprising chlorite, hematite, sericite, clay and local epidote. Bleaching, recrystallisation and quartz veining were also observed adjacent to interpreted fault zones. These observations indicate that several tested conductors occur within broader structurally reactivated and hydrothermally altered basement corridors, rather than representing graphitic packages alone. The geological features identified are consistent with the principal components of the Company’s targeting exploration model for basement-hosted uranium systems and with geological settings observed at deposits such as Eagle Point and Rabbit Lake on the eastern margin of the Athabasca Basin. The significance of these observations, including their relationship to uranium mineralisation, will be assessed following receipt and interpretation of laboratory assays. The maiden program has materially improved Infini’s understanding of the continuity and character of graphitic horizons, Canadian Exploration Update: Exploration Momentum Builds Across Infini's Canadian Uranium Portfolio ASX:I88 the distribution of brittle structures and hydrothermal alteration, and the relationship between surface uranium anomalism and the underlying basement geology. These results provide an important technical foundation for refining the Reynolds Lake and Reitenbach Lake exploration models and prioritising future exploration. Infini’s Strategic Technical Advisor, Andy Yackulic, said: "While the high-grade Titus showing (1.90% U3O8) proved the presence of surface uranium on the property, our 2026 drilling has now intersected reactivated graphitic faults and hydrothermal hematite, conditions considered highly prospective for basement-hosted mineralisation on the margins of the Athabasca Basin. This significantly upgrades the project's potential scale, confirming an active structural and hydrothermal system with real depth.” Figure 1: Example of structural deformation, hydrothermal alteration and basement settings encountered during the maiden drilling campaign at Reynolds Lake and Reitenbach Lake, diamond drill core of hole REI26DDH004, depth 155.4m - 168.8m. All core samples from the completed program have been submitted to the Saskatchewan Research Council, an ISO/IEC 17025:2017 accredited laboratory, for multi-element analysis. Assay results are currently expected in late Q3 CY2026, based on guidance from SRC and other accredited North American laboratories experiencing significant congestion and extended turnaround times, and remain subject to any further changes in laboratory processing schedules. Once received, the assay results will be integrated with geological logging, downhole gamma data, surface geochemistry, airborne EM, magnetics, radiometrics and structural interpretation. This integrated review will be used to evaluate the presence, grade and continuity of uranium mineralisation, refine exploration vectors and rank the drill-tested corridors. The review will also reassess the broader 80km EM conductor network and 15km by 3km prospective corridor using the new subsurface geological information. Outcomes will guide the design of potential Phase 2 drilling and targeted surface exploration across the highest-priority areas. Key next steps include: • Receipt of Reynolds Lake and Reitenbach Lake Phase 1 drilling assay results, expected late Q3 CY2026 and subject to delays in laboratory processing schedules; • Comprehensive review of the Reynolds Lake and Reitenbach Lake geological model, including the 80 km EM conductor network and the 15 km x 3 km prospective corridor, in light of new subsurface information; and • Planning potential further exploration activities at Reynolds Lake and Reitenbach Lake over the most prospective zones. Canadian Exploration Update: Exploration Momentum Builds Across Infini's Canadian Uranium Portfolio ASX:I88 Figure 2: Overview of surveyed drillhole locations of the maiden drilling program at Reynolds and Reitenbach Lake, targeting priority EM anomalies where magnetic features, structural complexity and uranium geochemical anomalism coincide. [END] This announcement has been approved for release by the Board of Directors of Infini Resources Ltd. To receive alerts for ASX announcements and updates, or to engage with Infini Resources directly by asking questions, watching video summaries and seeing what other shareholders have to say about this, as well as past announcements, please visit https://infiniresources.com.au or contact us directly at: Infini Resources Limited ABN 77 656 098 583 E: info@infiniresources.com.au T: +61 (08) 9465 1051 Canadian Exploration Update: Exploration Momentum Builds Across Infini's Canadian Uranium Portfolio ASX:I88 About Portland Creek The Portland Creek Uranium Project spans 329 km² and lies within the Precambrian Long-Range Complex of the Humber Tectonic-Stratigraphic Zone. The geology consists of metaquartzite and a suite of paragneisses, intruded by leucocratic granite, which are believed to have been thrust westward over Paleozoic carbonate-dominant sediments. The project area covers a large regional uranium anomaly, first identified in the 1970s through a Newfoundland government lake sediment sampling program. Originally, one uranium showing was recorded in the Newfoundland Mineral Deposit Index, reporting 2,180 ppm U₃O₈. A compilation of historic and recent exploration data have since delineated a 6 km zone of anomalous uranium and radon gas in lake sediments, soils and in an airborne radiometric survey. This anomaly closely follows a prominent fault scarp, marking the edge of a granitic plateau interpreted as a deep-seated fault. Since listing, the Company has verified historical uranium anomalies and completed a soil sampling grid over the Falls Lake Prospect (formerly the Talus Prospect). This work defined a ~800 m x 100 m high-grade uranium anomaly, with a peak result of 74,997 ppm U₃O₈. This anomaly is located down-ice and west of a 1.5 km radiometric anomaly. Additionally, Infini has identified a southern 500 m-wide cluster of high-grade soil samples, which includes a peak of 1,500 ppm U₃O₈ and lies 1.5 km from the recently completed Phase 2 drill program. Figure 3: Overview of prospective exploration areas at Portland Creek, demonstrating the occurrence of soil sampling assays up to 74,997 ppm U₃O₈, anomalous radiometric data and Infini’s package of tenements. Canadian Exploration Update: Exploration Momentum Builds Across Infini's Canadian Uranium Portfolio ASX:I88 About Reynolds Lake & Reitenbach Lake The Reynolds Lake and Reitenbach Lake Uranium Projects collectively comprise 22 mineral claims covering a total footprint of 767 km² on the eastern outboard margin of the Athabasca Basin in northern Saskatchewan. The projects are contiguous, with Reynolds Lake consisting of 12 claims (386 km²) and Reitenbach Lake consisting of 10 claims (381 km²) adjoining its northern boundary. The properties are underlain by Archean to Paleoproterozoic metamorphic and igneous rocks and are bisected by the crustal-scale Needle Falls Shear Zone, a major structural corridor separating the Wollaston Domain to the west from the Peter Lake Domain to the east. The Wollaston Domain is dominated by Paleoproterozoic siliciclastic metasediments including paragneiss, quartzite, and calc-silicate units, while the Peter Lake Domain contains Archean to Paleoproterozoic granitoid gneisses and supracrustal rocks. Both domains are strongly deformed and metamorphosed, with northeast- trending isoclinal folding and later cross-cutting north–south fault systems that provide structural complexity and potential pathways for hydrothermal fluid flow. Graphitic schists and gneisses, key lithologies known to host unconformity-associated uranium mineralisation, have been identified within the project area and are spatially associated with electromagnetic conductors, radiometric anomalies and elevated uranium-in-lake sediment samples. Recent exploration has confirmed primary uranium mineralisation at surface at Reitenbach Lake, while petrographic analysis has validated a structurally prepared and hydrothermally altered basement environment consistent with a basement-related uranium system. Regionally, the geological setting is considered analogous to uranium systems at Eagle Point and Rabbit Lake, where mineralisation occurs along graphitic shear zones at the boundary between metasediments and granitoid basement. Figure 4: Location of the Reynolds Lake and Reitenbach Lake Uranium Projects relative to the world-renowned Athabasca Basin, synonymous with high-grade uranium deposits, and in close proximity to existing operations, access and infrastructure. Canadian Exploration Update: Exploration Momentum Builds Across Infini's Canadian Uranium Portfolio ASX:I88 About Infini Resources Ltd (ASX: I88) Infini Resources Ltd is an Australian energy metals company focused on mineral exploration in Canada and Western Australia for uranium and lithium. The company has a diversified and highly prospective portfolio of assets that includes greenfield and more advanced brownfield projects. The company’s mission is to increase shareholder wealth through exploration growth and mine development. JORC 2012 Mineral Resource Deposit JORC 2012 Classification Tonnes and Grade Des Herbiers (U) Inferred Combined Resource 162 Mt @ 123ppm U3O8 (43.95mlb) Figure 5: Overview of Infini's portfolio of projects and global footprint. Competent Person Statement The information in this announcement that relates to Exploration Results for the Portland Creek, Reynolds Lake and Reitenbach Lake Uranium Projects is based on, and fairly represents, information and supporting documentation compiled and evaluated by Mr. David Heasman, an independent consultant to the Company through SMCG Services Inc., who is a Professional Geoscientist (P.Geo.) and a member in good standing of the Professional Engineers and Geoscientists of Newfoundland and Labrador (PEGNL). Mr. Heasman has sufficient experience relevant to the styles of mineralisation, types of deposit under consideration, and the activities being undertaken to qualify as a Competent Person as defined in the 2012 Edition of the 'Australian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves' (JORC Code). Mr. Heasman consents to the inclusion of the information in the form and context in which it appears. The information in this market announcement is an accurate representation of the available data and studies for the Portland Creek, Reynolds Lake and Reitenbach Lake Uranium Projects. Compliance Statement This announcement contains information on the Portland Creek Project extracted from ASX market announcements dated 10 January 2024, 15 January 2024, 29 January 2024, 19 February 2024, 28 May 2024, 1 July 2024, 10 July 2024, 22 July 2024, 14 October 2024, 23 December 2024, 26 March 2025, 4 July 2025, 14 July 2025, 28 July 2025, 30 July 2025, 3 September 2025, 11 September 2025, 9 October 2025, 13 October 2025, 21 November 2025, 12 December 2025, 9 February 2026, 26 May 2026 and 13 July 2026 reported in accordance with the 2012 edition of the “Australian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves” (JORC Code). The original market announcements are available to view on www.infiniresources.com.au and www.asx.com.au. The Company is not aware of any new information or data that materially affects the information included in the original market announcement. This announcement contains information on the Reynolds Lake Uranium Project and the Reitenbach Lake Uranium Project extracted from ASX market announcements dated 25 February 2025, 31 March 2025, 24 July 2025, 20 August 2025, 9 September 2025, 22 September 2025, 2 October 2025, 3 October 2025, 26 November 2025, 23 December 2025, 12 January 2026, 19 January 2026, 28 January 2026 and 31 March 2026 and reported in accordance with the 2012 edition of the “Australian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves” (JORC Code). The original market announcements are available to view on www.infiniresources.com.au and www.asx.com.au. The Company is not aware of any new information or data that materially affects the information included in the original market announcement. This announcement contains information regarding the Des Herbiers Mineral Resources Estimate extracted from the Company’s Prospectus dated 30 November 2023 and released to the ASX market announcements platform on 10 January 2024, reported in accordance with the 2012 edition of the “Australian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves” (JORC Code). The Company confirms that it is not aware Canadian Exploration Update: Exploration Momentum Builds Across Infini's Canadian Uranium Portfolio ASX:I88 of any new information or data that materially affects the information included in any original announcement and that all material assumptions and technical parameters underpinning the estimates in the original market announcement continue to apply and have not materially changed. The original market announcements are available to view on https://infiniresources.com.au and www.asx.com.au. Forward Looking Statements This announcement may contain certain forward-looking statements and projections. Statements regarding I88’s plans with respect to its mineral properties and programs are forward-looking statements. Such forward-looking statements/projections are estimates for discussion purposes only and should not be relied upon. Forward-looking statements/projections are inherently uncertain and may therefore differ materially from results ultimately achieved. There can be no assurance that I88’s plans for development of its mineral properties will proceed as currently expected. There can also be no assurance that I88 will be able to confirm the presence of additional mineral resources, that any mineralisation will prove to be economic or that a mine will successfully be developed on any of I88’s mineral properties. Infini Resources Limited does not make any representations and provides no warranties concerning the accuracy of the projections and disclaims any obligation to update or revise any forward-looking statements/projections based on new information, future events or otherwise, except to the extent required by applicable laws. While the information contained in this report has been prepared in good faith, neither Infini Resources Limited or any of its directors, officers, agents, employees or advisors give any representation or warranty, express or implied, as to the fairness, accuracy, completeness or correctness of the information, opinions and conclusions contained in this announcement. Canadian Exploration Update: Exploration Momentum Builds Across Infini's Canadian Uranium Portfolio Canadian Exploration Update: Exploration Momentum Builds Across Infini's Canadian Uranium Portfolio ASX:I88 Appendix 1: Completed drillhole details of maiden drilling at Reynolds Lake and Reitenbach Lake Table 1: Details of completed drillholes at the Reynolds Lake and Reitenbach Lake Phase 1 drilling program. All survey sites are projected in NAD83 UTM Zone 13N. Hole UTM East (m) UTM North (m) UTM Elevation (m) Azimuth (degrees) Dip (degrees) Length (m) REY26DDH001 620802 6418443 428 310 -45 266 REY26DDH002 622747 6420806 415 135 -57 252 REI26DDH003 623728 6426381 406 138 -58 233 REI26DDH004 622766 6425017 408 150 -43 311 REI26DDH005 622766 6425017 408 138 -60 251 REI26DDH006 624220 6427319 406 133 -44 131 REI26DDH007 624326 6427225 407 136 -38 251 REI26DDH008 629532 6432834 389 138 -42 226 REI26DDH009 629538 6432902 398 176 -47 206 REI26DDH010 628424 6434955 403 307 -60 251 REI26DDH011 634659 6440886 394 132 -57 152 REI26DDH012 639937 6470234 419 132 -56 176 REI26DDH013 641594 6457394 435 136 -79 176 REI26DDH014 623801 6425458 425 132 -51 227 REI26DDH015 623441 6424028 421 160 -44 89 REI26DDH016 623441 6424028 421 155 -64 116 Canadian Exploration Update: Exploration Momentum Builds Across Infini's Canadian Uranium Portfolio Canadian Exploration Update: Exploration Momentum Builds Across Infini's Canadian Uranium Portfolio ASX:I88 JORC Code, 2012 Edition – Table 1 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. • 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 (e.g. ‘reverse circulation drilling was used to obtain 1 m samples from which 3 kg was pulverised to p