Last checked at 30 Apr 2020 07:00
30 April 2020
Dissemination of a Regulatory Announcement that contains inside information according to REGULATION (EU) No 596/2014 (MAR)
Greatland Gold plc
("Greatland" or "the Company")
Newcrest Reports Further Outstanding Drill Results at Havieron
Step out drilling along strike and at depth to commence this quarter following further exceptional results from infill drilling at Havieron
Greatland Gold plc (AIM:GGP), the precious and base metals exploration and development company, is pleased to provide an update on Newcrest's drilling campaign at Greatland's Havieron deposit in the Paterson region of Western Australia.
Greatland notes the release of an ASX announcement titled "Newcrest Quarterly Exploration Report" by Newcrest Mining Ltd ("Newcrest") earlier today.
Highlights
· Exceptional drill results from Havieron further demonstrate the continuity of the higher grade mineralisation within an arcuate sulphide zone and expand the footprint of the mineralisation within this zone and the surrounding proximal breccia.
· Drilling has further developed understanding of mineralised breccias, with broad high-grade intersections in the breccia zone reported for a second successive set of drill results.
· Newcrest currently progressing a Concept Study, with targeted completion in the second half of calendar year 2020, investigating the potential to develop the orebody under both underground selective mining and bulk mining alternatives.
Best New Results (not previously reported on 11 March 2020)
· HAD039: 86.6m @ 2.8g/t Au, 0.37% Cu from 693m, including
· 27.1m @ 4.4g/t Au, 0.74% Cu from 710.9m
· HAD039W2: 148m @ 2.7g/t Au, 0.45% Cu from 668m, including
· 53m @ 6.2g/t Au, 0.71% Cu from 700m
· HAD043: 167.4m @ 2.4g/t Au, 0.66% Cu from 608m, including
· 22.8m @ 9.3g/t Au, 0.96% Cu from 712.3m
· HAD052: 234m @ 1.7g/t Au, 0.29% Cu from 563m, including
· 62m @ 3.8g/t Au, 0.5% Cu from 614.2m
Next Steps
· Nine rigs operational as drilling activity continues towards the objective of delivering a maiden resource in the second half of calendar year 2020.
· Step out drilling along strike to the north-west and at depth expected to commence in the near term following completion of current phase of infill drilling.
· Newcrest planning approximately 80,000 metres of drilling at Havieron over the 12 months commencing 1 July 2020.
· Environmental and baseline studies progressing to support fast tracking of decline commencement at Havieron by end of calendar year 2020 or early 2021, subject to market and operating conditions and receipt of all necessary permits, consents and approvals.
· Investigating potential to achieve commercial production within two to three years from commencement of decline.
Gervaise Heddle, Chief Executive Officer of Greatland Gold plc, commented: "We are delighted by the seventh consecutive set of excellent results from Newcrest's drilling campaign, further demonstrating the robustness and continuity of high-grade mineralisation at Havieron, which remains open to the north west and at depth. These results represent another important step towards our near-term objective of a maiden resource at Havieron, and further reinforce the potential to accelerate the timetable for commercial production.
"We are pleased by the extensive steps taken by Newcrest to mitigate the risks of the COVID-19 pandemic at site, whilst maintaining their ongoing commitment to Havieron with nine drill rigs currently operational. We expect step out drilling along strike and at depth to commence in the near term, which will begin to provide us with a clearer picture of the potential to further extend the zone of high-grade mineralisation at Havieron."
Analytical results for HAD039, HAD039W2, HAD043, HAD043W1, HAD050, HAD051 and HAD052 have been received and are announced today. Significant intercepts are presented in Table 1.
Table 1 - Selected Significant Havieron Intercepts
Hole ID | From (m) | To (m) | Width (m) | Gold (g/t) | Copper (%) |
HAD039 | 693 | 779.6 | 86.6 | 2.8 | 0.37 |
Including | 710.9 | 738 | 27.1 | 4.4 | 0.74 |
HAD039 | 1022 | 1147 | 125 | 2.1 | 0.05 |
Including | 1134 | 1145 | 11 | 7.5 | 0.11 |
HAD039 | 1164 | 1227 | 63 | 3.1 | 0.14 |
Including | 1202.1 | 1219.4 | 17.4 | 8 | 0.32 |
HAD039W2 | 668 | 816 | 148 | 2.7 | 0.45 |
Including | 700 | 753 | 53 | 6.2 | 0.71 |
HAD043 | 608 | 775.4 | 167.4 | 2.4 | 0.66 |
Including | 712.3 | 735 | 22.8 | 9.3 | 0.96 |
Including | 741.2 | 758.3 | 17.1 | 4.7 | 0.53 |
HAD043 | 986 | 1018.2 | 32.2 | 1.8 | 0.14 |
HAD043W1 | 608 | 692 | 84 | 0.73 | 0.55 |
HAD043W1 | 768.2 | 834 | 65.8 | 2 | 0.63 |
Including | 808 | 819.4 | 11.4 | 3.2 | 0.79 |
HAD043W1 | 852.5 | 881 | 28.5 | 4.7 | 0.28 |
Including | 861 | 873 | 12.1 | 11 | 0.39 |
HAD043W1 | 896.4 | 939 | 42.7 | 3.4 | 0.38 |
Including | 913 | 930.8 | 17.8 | 6.5 | 0.7 |
HAD050 | 615 | 692.3 | 77.3 | 1.1 | 0.09 |
Including | 635 | 647 | 12 | 3.5 | 0.36 |
HAD051 | 508 | 545 | 37 | 3.6 | 1.1 |
Including | 517 | 534 | 17 | 7.5 | 2.1 |
HAD051 | 555.1 | 569 | 13.9 | 4.3 | 0.72 |
HAD052 | 563 | 797 | 234 | 1.7 | 0.29 |
Including | 614.2 | 676.1 | 62 | 3.8 | 0.5 |
HAD052 | 856 | 896 | 40 | 5 | 0.2 |
Including | 865 | 879 | 14 | 14 | 0.23 |
Reporting Criteria are listed in Appendix II
In addition to this release, a PDF version of this report, with supplementary information can be found at the Company's website: www.greatlandgold.com/media/jorc/
Further Information on Newcrest Drilling and Operations at Havieron
Exploration activities at Havieron are operated by Newcrest under a Farm-in Agreement with Greatland. The Havieron deposit is centred on a magnetic anomaly located 45km east of Telfer. Exploration drilling by Greatland during 2018 resulted in the discovery of significant gold and copper mineralisation under 400m of post mineral cover. Newcrest commenced drilling at Havieron during the June 2019 quarter.
Analytical results released today are considered exceptional and represent continued infill drilling to support a maiden resource. Significant results are presented in Table 1. Drilling continues to demonstrate the robustness of the Havieron gold-copper orebody, support grade and continuity of mineralisation, and confirm the presence of high grade gold in breccia and sulphide mineralisation. Mineralisation remains open to the north west and at depth, and step out drilling along strike and at depth to expand the mineralised envelope is expected to commence this quarter.
A further 17,231m of new drilling has been completed in the quarter to 31 March 2020. Ongoing drilling and assay results confirm broad widths of gold mineralisation at Havieron. Drilling at Havieron continues to demonstrate the continuity of the higher grade mineralisation within an arcuate sulphide zone and expands the footprint of the mineralisation within this zone and the surrounding proximal breccia. Mineralisation has now been defined more than 400m in length, up to 150m wide and up to 600m below cover, and remains open to the north-west and at depth. Limited deep drilling has intersected mineralised breccias up to 1,000m below cover.
Drilling has further developed understanding of mineralised breccias proximal to the arcuate mineralised zone, with broad intercepts supporting the potential for bulk mineable options, and broad high grade intersections within the breccia zone reported for a second successive set of drill results (HAD052 - 40m @ 5.0g/t Au from 856m including 14m @ 14g/t Au from 865m). Higher grades within the breccia zone are developed within 100m of the arcuate mineralised zone. The mineralised breccias have been observed to 1,200m below surface and remain open at depth, and along strike to the north west. Further drilling is required to understand the controls and dimensions of breccia-related mineralisation.
Results to date support potential for both high-grade selective and bulk mining methods, which are currently being evaluated. Additional drilling is planned by Newcrest to support the objective of delivering a maiden resource estimate in the second half of calendar year 2020. Growth drilling program to define the extent of the depth and lateral extent of mineralisation to commence in the current quarter. Newcrest is planning approximately 80,000 metres of drilling at Havieron over the 12 months commencing 1 July 2020.
A number of environmental, geotechnical and metallurgical studies are continuing in order to support a mineral resource estimate, and future permitting requirements. Newcrest continues to investigate the potential to fast track an exploration decline at Havieron by the end of calendar year 2020 or early 2021, subject to market and operating conditions and receipt of all necessary permits, consents and approvals. Newcrest are currently progressing a Concept Study, with targeted completion in the second half of calendar year 2020, investigating the potential to develop the orebody under both underground selective mining and bulk mining alternatives.
Newcrest has implemented measures to reduce and mitigate the risk of the COVID-19 pandemic to its project workforce and key stakeholders. Potential impacts of the COVID-19 pandemic on the drilling activity at Havieron are being actively managed and considered as part of the studies underway.
Stage 3 of the Farm-in continues. Currently, nine drill rigs are operational. An expanded 100 person camp is on-site to support ongoing operations. In order to complete Stage 3 of the Farm-in Agreement, Newcrest must spend an additional US$25 million and deliver a Pre-Feasibility study for the Havieron Project.
Additional drill hole information is presented in Appendix I and tabulated drill hole intercepts are presented in Appendix II.
Deposit mineralisation is hosted by metasedimentary (meta-sandstones, meta-siltstones and meta-carbonate) and intrusive rocks. Gold and copper mineralisation is hosted in breccia, vein and massive sulphide replacement styles, typical of intrusion-related and skarn types of mineralisation. The main sulphide mineral assemblage contains well developed pyrrhotite-chalcopyrite and pyrite. Alteration assemblages associated with mineralisation are amphibole-carbonate-biotite-sericite-chlorite. Higher grade gold zones (+10g/t Au) are often associated with quartz/chalcopyrite-pyrite veining.
Background to Havieron and Farm-in Agreement with Newcrest
In March 2019, Greatland entered into a Farm-in Agreement with Newcrest Operations Limited, a wholly-owned subsidiary of Newcrest Mining Limited (ASX:NCM), to explore and develop Greatland's Havieron gold-copper discovery in the Paterson region of Western Australia. Newcrest has the right to earn up to a 70% interest in a 12-block area within E45/4701 that covers the Havieron target by spending up to US$65m. Newcrest may acquire an additional 5% interest at the end of the Farm-in period at fair market value.
Newcrest has completed Stage 2 of the Farm-in Agreement. In accordance with the terms of the Agreement, Newcrest has earned a 40% interest in the Havieron Project. In order to complete Stage 3 of the Farm-in, Newcrest must incur an additional US$25 million in expenditure and deliver a Pre-Feasibility study for the Havieron Project. If Newcrest successfully completes Stage 3, Newcrest will earn an additional 20% Farm-in Interest (cumulative 60% Farm-in interest).
During the Farm-In period, Newcrest will have a first right of refusal over the remainder of Greatland Gold's Paterson projects (Black Hills, Paterson Range East and remainder of the Havieron licence). The Farm-in Agreement includes tolling principles reflecting the intention of the parties that, subject to a successful exploration program and feasibility study, the resulting joint venture ore will be processed at Telfer, located 45km west of Havieron.
A regional map showing the Havieron licence area with regional targets and adjacent landholdings can be found at: www.greatlandgold.com/paterson
Competent Person:
Information in this announcement that relates to exploration results has been extracted from the following announcements:
"Newcrest Quarterly Exploration Report", dated 30 April 2020
"Newcrest Exploration and Guidance Update", dated 11 March 2020
"Further Outstanding Drill Results at Havieron", dated 11 March 2020
"Newcrest Quarterly Exploration Report", dated 30 January 2020
"Exploration Update - Drilling Returns High Grade Results at Havieron", dated 2 December 2019
"Newcrest Quarterly Exploration Report - September 2019", dated 24 October 2019
"Exploration Update - Havieron", dated 10 September 2019
"Newcrest Quarterly Exploration Report - June 2019", dated 25 July 2019
Information in this announcement, which has been taken from Newcrest Mining Limited's announcement "Newcrest Quarterly Exploration Report", dated 30 April 2020, has been reviewed and approved by Mr Mick Sawyer, a member of the Australian Institute of Geoscientists and a Registered Professional Geoscientist (R.P.Geo #10194), who has more than 15 years relevant industry experience. Mr Sawyer is Exploration Manager and a full-time employee of Greatland Pty Ltd, and holds employee options in Greatland Gold plc. Mr Sawyer, has sufficient experience relevant to the style of mineralisation and type of deposit under consideration, and to the activity which he is undertaking to qualify as a Competent Person as defined by the 2012 Edition of the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves (the JORC Code) and under the AIM Rules - Note for Mining and Oil & Gas Companies, which outline standards of disclosure for mineral projects. Mr Sawyer consents to the inclusion in this announcement of the matters based on this information in the form and context in which it appears. Mr Sawyer confirms that the Company is not aware of any new information or data that materially affects the information included in the relevant market announcements, and that the form and context in which the information has been presented has not been materially modified.
Additional information on the project can be found on the Company's website at www.greatlandgold.com/paterson/
In addition to this release, a PDF version of this report, with supplementary information can be found at the Company's website: www.greatlandgold.com/media/jorc
Enquiries:
Greatland Gold PLC
Gervaise Heddle/Callum Baxter
Tel: +44 (0)20 3709 4900
Email: info@greatlandgold.com
www.greatlandgold.com
SPARK Advisory Partners Limited (Nominated Adviser)
Andrew Emmott/James Keeshan
Tel: +44 (0)20 3368 3550
SI Capital Limited (Joint Broker)
Nick Emerson/Alan Gunn
Tel: +44 (0)14 8341 3500
Numis Securities Limited (Joint Broker)
John Prior/Paul Gillam/Alamgir Ahmed
Tel: +44 (0)20 7260 1000
Luther Pendragon (Media and Investor Relations)
Harry Chathli/Alexis Gore/Joe Quinlan
Tel: +44 (0)20 7618 9100
Notes for Editors:
Greatland Gold plc is a London Stock Exchange AIM-listed (AIM:GGP) natural resource exploration and development company with a current focus on precious and base metals. The Company has six main projects; four situated in Western Australia and two in Tasmania.
In March 2019, Greatland signed a Farm-in Agreement with Newcrest Operations Limited, a wholly-owned subsidiary of Newcrest Mining Limited (ASX:NCM), to explore and develop Greatland's Havieron gold-copper deposit in the Paterson region of Western Australia. Newcrest has the right to earn up to a 70% interest in a 12-block area within E45/4701 that covers the Havieron target by spending up to US$65 million.
Greatland is seeking to identify large mineral deposits in areas that have not been subject to extensive exploration previously. It is widely recognised that the next generation of large deposits will come from such under-explored areas and Greatland is applying advanced exploration techniques to investigate a number of carefully selected targets within its focused licence portfolio.
The Company is also actively investigating a range of new opportunities in precious and strategic metals and will update the market on new opportunities as and when appropriate.
APPENDIX I
Havieron Project (Greatland Gold plc farm-in agreement): JORC Table 1
Section 1 Sampling Techniques and Data
Criteria | Commentary |
Sampling techniques | Diamond core samples are obtained from diamond drilling in Proterozoic basement lithologies. PQ-HQ and NQ diameter diamond core was drilled on a 6m run. Diamond core was cut using an automated core-cutter and half core sampled at 1 m intervals with breaks for major geological changes. Sampling intervals range from 0.2 - 1.0 m. Cover sequences were not sampled. |
Drilling techniques | Permian Paterson Formation cover sequence was drilled using mud rotary drilling. Depths of cover typically observed to approximately 420 m vertically below surface. Steel casing was emplaced to secure the pre-collar. Diamond drilling was advanced from the base of the cover sequence with PQ3, HQ3 and NQ2 diameter coring configuration. Diamond core from inclined drill holes are oriented on 3m and 6m runs using an electronic core orientation tool (Reflex ACTIII). At the end of each run, the bottom of hole position is marked by the driller, which is later transferred to the whole drill core run length with a bottom of hole reference line. |
Drill sample recovery | Diamond core recovery is systematically recorded from the commencement of diamond coring to end of hole, by reconciling against driller's depth blocks in each core tray with data recorded in the database. Drillers depth blocks provided the depth, interval of core recovered, and interval of core drilled. Diamond core recoveries were typically 100%, with isolated zones of lower recovery. Cover sequence drilling by the mud-rotary drilling did not yield recoverable samples. |
Logging | Geological logging recorded qualitative descriptions of lithology, alteration, mineralisation, veining, and structure (for all diamond core drilled - 8,502m), including orientation of key geological features. Geotechnical measurements were recorded including Rock Quality Designation (RQD) fracture frequency, solid core recovery and qualitative rock strength measurements. Magnetic susceptibility measurements were recorded every metre. The bulk density of selected drill core intervals was determined at site on whole core samples. All geological and geotechnical logging was conducted at Havieron site. Digital data logging was captured on diamond drill core intervals only, and all data validated and stored in an AcQuire database. All drill cores were photographed, prior to cutting and/or sampling the core. |
Sub-sampling techniques and sample preparation | Sampling, sample preparation and quality control protocols are considered appropriate for the material being sampled. Diamond core was cut and sampled at the Telfer and Havieron core processing facility. Half core samples were collected in pre-numbered calico bags and grouped in plastic bags for dispatch to the laboratory. Sample weights typically varied from 0.5 to 4 kg. Sample sizes are considered appropriate for the style of mineralisation. Drill core samples were freighted by air and road to the laboratory. Sample preparation was conducted at Intertek Laboratory, Perth. Samples were dried at 105oC, and crushed to 95% passing 4.75 mm, and the split to obtain up to 3 kg sub-sample, which was pulverised (using LM5) to produce a pulped product with the minimum standard of 95% passing 106 μm. Duplicate samples were collected from crush and pulp samples at a rate of 1:20. Duplicate results show an acceptable level of variability for the material sampled and style of mineralisation. Periodic size checks (1:20) for crush and pulp samples and sample weights are provided by the laboratory and recorded in the Acquire database. |
Quality of assay data and laboratory tests | Assaying of diamond drill core samples was conducted at Intertek, Perth. All samples were assayed for 48 elements using a 4-acid digestion followed by ICP-AES/ICP-MS determination (method 4A/MS907). Gold analyses were determined by 50 g fire assay with AAS finish (method FA50N/AA). Sampling and assaying quality control procedures consisted of inclusion of certified reference material (CRMs), coarse residue and pulp duplicates with each batch (at least 1:20). Assays of quality control samples were compared with reference samples in AcQuire database and verified as acceptable prior to use of data from analysed batches. Laboratory quality control data, including laboratory standards, blanks, duplicates, repeats and grind size results are captured in Acquire database and assessed for accuracy and precision for recent data. Extended quality control programs have commenced with pulp samples submitted to an umpire laboratory and combined with more extensive re-submission programs. Analysis of the available QC sample assay results indicates that an acceptable level of accuracy and precision has been achieved and the database contains no analytical data that has been numerically manipulated. The assaying techniques and quality control protocols used are considered appropriate for the data to be used for reporting exploration drilling results. |
Verification of sampling and assaying | Sampling intervals defined by the Geologist are electronically assigned sample identification numbers prior to core cutting. Corresponding sample numbers matching pre-labelled calico bags are assigned to each interval. All sampling and assay information were stored in a secure Acquire database with restricted access. Electronically generated sample submission forms providing the sample identification number accompany each submission to the laboratory. Assay results from the laboratory with corresponding sample identification are loaded directly into the Acquire database. Assessment of reported significant assay intervals was verified by re-logging of diamond drill core intervals and assessment of high-resolution core photography. The verification of significant intersections has been completed by company personnel and the Competent Person. No adjustments are made to assay data, and no twinned holes have been completed. Drilling intersects mineralisation at various angles. |
Location of data points | Drill collar locations were surveyed using a differential GPS with GNSS with a stated accuracy of +/- 0.5m for all drill holes reported. Drill rig alignment was attained using an electronic azimuth aligner. Downhole survey was collected at 6-12 m intervals in the cover sequence, and every 6 to 30 m in diamond drill core segments of the drill hole using single shot (Axis Mining Champ Gyro). The single shot surveys have been validated using continuous survey to surface (Axis Mining Champ) along with a selection of drillholes re-surveyed by an external survey contactor using a DeviGyro tool - confirming sufficient accuracy for downhole spatial recording. Topographic control is established from SRTM (1 second) topographic data and derived digital elevation model. The topography is generally low relief to flat, with an average elevation of 265 m, within dune corridors. All collar coordinates are provided in the Geocentric Datum of Australian (GDA94 Zone 51S). |
Data spacing and distribution | The drill hole spacing ranges from 50 - 500 m in lateral extent within an area of 1.5 square kilometres. The current drill hole spacing does not provide sufficient information for the estimation of a Mineral Resource. Significant assay intercepts remain open. Further drilling is required to determine the extent of currently defined mineralisation. No sample compositing is applied to samples. |
Orientation of data in relation to geological structure | Drill holes exploring the extents of the Havieron Mineral System intersect moderately dipping carbonate and siliclastic sedimentary facies, mineralised breccia and sub-vertical intrusive lithologies. Mineralised zones have been modelled to be steeping dipping and have an arcuate shape, which remains open to the north west, and at depth. Geological modelling has been interpreted from historic and Newcrest drill holes. Drilling of reported holes HAD022, HAD029, HAD037, HAD038, HAD039, HAD039W2, HAD040, HAD041 and HAD049 are oriented perpendicular to a central dolerite dyke. The dolerite dyke has a north-south orientation, with drilling established on an east-west orientation. Drilling direction has been modified for subsequent drill holes HAD042, HAD043, HAD043W1, HAD044, HAD045, HAD046, HAD047, HAD048, HAD050, HAD051 and HAD052 in order to intersect perpendicular to modelled positions of the high grade sulphide mineralisation zones; drill holes have been oriented on a NE and NW drill direction in order to intersect the mineralised zone at an intersection angle of greater than 40 degrees. The high-grade arcuate mineralised sulphide zone has a true thickness between 10 and 30 m and has been defined over a strike length of up to 400 m, and over 600 m in vertical extent below cover. Mineralised breccias are observed, however the orientation and extents of the breccia bodies are yet to be defined by drilling and remain open to the north, and at depth. |
Sample security | The security of samples is controlled by tracking samples from drill rig to database. Drill core was delivered from the drill rig to the Havieron core yard every shift. On completion of geological and geotechnical logging, core was transported by vehicle to Telfer core processing facility by Newcrest personnel. High resolution core photography and cutting of drill core was undertaken at the Havieron or Telfer core processing facility. Samples were freighted in sealed bags by air and road to the Laboratory, and in the custody of Newcrest representatives. Sample numbers are generated directly from the database. All samples are collected in pre-numbered calico bags. Verification of sample numbers and identification is conducted by the laboratory on receipt of samples, and sample receipt advise issued to Newcrest. Details of all sample movement are recorded in a database table. Dates, Hole ID sample ranges, and the analytical suite requested are recorded with the dispatch of samples to analytical services. Any discrepancies logged at the receipt of samples into the analytical services are validated. |
Audits or reviews | Due to the limited duration of the program, no external audits or reviews have been undertaken. Internal verification and audit of Newcrest exploration procedures and databases are periodically undertaken. |
Section 2 Reporting of Exploration Results
Criteria | Commentary |
Mineral tenement and land tenure status | The Havieron Project is entirely contained within 12 sub-blocks of E45/4701, which is 100% owned by Greatland Pty Ltd. Newcrest has entered into an Exploration Farm-In (EFI) agreement with Greatland Pty Ltd and Greatland Gold Plc effective 12 March 2019, with Newcrest as Manager of the Havieron Project. The Stage 2 expenditure commitment of US$20m under the Farm-in agreement with Greatland Gold has been met. Newcrest has earned a 40% interest in the project and has provided notice to Greatland that it is proceeding to Stage 3 of the project. There is a current ILUA (Indigenous Land Use Agreement) signed in December 2015 in which the ILUA heritage protocols apply to Newcrest activities at Havieron. All obligations with respect to legislative requirements including minimum expenditure are maintained in good standing. The exploration tenement E45/4701 was first granted 17 July 2017 for 5 years, expiring 16 July 2022. |
Exploration done by other parties | Newcrest Mining Limited completed six diamond core holes in the vicinity of the Havieron Project from 1991 to 2003. Greatland Gold completed drill targeting and drilling of 9 Reverse Circulation (RC) drill holes with diamond tails for a total of approximately 6,800 m in 2018. Results of drilling programs conducted by Greatland Gold have previously been reported on the Greatland Gold web site. Drilling has defined an intrusion-related mineral system with evidence of breccia- and massive sulphide-hosted higher-grade gold-copper mineralisation. |
Geology | The Havieron Project is located within the north-western exposure of the Palaeo-Proterozoic to Neoproterozoic Paterson Orogen (formerly Paterson Province), 45 km east of Telfer. The Yeneena Supergroup hosts the Havieron prospect and consists of a 9 km thick sequence of marine sedimentary rocks and is entirely overlain by approximately 420 m of Phanerozoic sediments of the Paterson Formation and Quaternary aeolian sediments. Gold and copper mineralisation at Havieron consist of breccia, vein and massive sulphide replacement gold and copper mineralisation typical of intrusion-related and skarn styles of mineralisation. Mineralisation at the prospect is hosted by metasedimentary rocks (meta-sandstones, meta-siltstones and meta-carbonate) and intrusive rocks of an undetermined age. The main mineral assemblage contains well developed pyrrhotite-chalcopyrite and pyrite sulphide mineral assemblages as breccia and vein infill, and massive sulphide lenses. The main mineralisation event is associated with amphibole-carbonate-biotite-sericite-chlorite wall rock alteration. Drilling has partially defined the extents of mineralisation which are observed over 450 m within an arcuate shaped mineralised zone, and to depths of up to -1,100mRL. |
Drill hole Information | As provided. |
Data aggregation methods | Significant assay intercepts are reported as (A) length-weighted averages exceeding 1.0 g/t Au greater than or equal to 10 m, with less than 5 m of consecutive internal dilution; and (B) length-weighted averages exceeding 0.2 g/t Au for greater than or equal to 20 m, with less than 10 m of consecutive internal dilution, and (C) and intervals of >30 gram metres (calculated as the weighted average of consecutive assayed interval multiplied by the Au grade in ppm exceeding a value 30, with no internal dilution). No top cuts are applied to intercept calculations. |
Relationship between mineralisation widths and intercept lengths | Significant assay intervals reported represent apparent widths. Drilling is not always perpendicular to the dip of mineralisation and true widths are less than downhole widths. Estimates of true widths will only be possible when all results are received, and final geological interpretations have been completed. |
Diagrams | As provided. |
Balanced reporting | This is the seventh release of Exploration Results for this project made by Newcrest. The initial Newcrest release is dated the 25 July 2019. The second release is dated the 10 September 2019. The third release is dated the 24 October 2019. The fourth release is dated 2 December 2019. The fifth release is dated 30 January 2020. The sixth release is dated 11 March 2020. Earlier reporting of exploration programs conducted by Newcrest and Greatland Gold have previously been reported. Exploration drilling programs are ongoing and further material results will be reported in subsequent Newcrest releases. |
Other substantive exploration data | Nil. |
Further work | Further work is planned to evaluate exploration opportunities that extend the known mineralisation. Initial drilling conducted by Newcrest has confirmed higher grade mineralisation, broadened mineralised extents defined by prior drilling and extended the depth of observed mineralisation of the Havieron prospect. The results of drilling to date indicate the limits of mineralisation have been closed off to the east, and south, and remain open to the north, and at depth. Drilling programs at Havieron are ongoing with nine drill rigs currently in operation. |
APPENDIX II
Drillhole Data
Havieron Prospect, Paterson, Western Australia
Reporting Criteria: Intercepts reported are Au >0.20ppm (0.2g/t Au) and minimum 20m downhole width with maximum consecutive internal dilution of 10m. Also highlighted are high grade intervals of Au >1.0ppm (1g/t Au) and minimum 10m downhole width with maximum consecutive internal dilution of 5m, and intervals of >30 gram metres (calculated as the weighted average of consecutive assayed interval multiplied by the Au grade in ppm exceeding a value 30, with no internal dilution) are tabled. Au grades are reported to two significant figures. Samples are from diamond core drilling which is PQ, HQ or NQ in diameter. Core is photographed and logged by the geology team before being cut. Half core PQ, HQ and NQ samples are prepared for assay and the remaining material is retained in the core farm for future reference. Each assay batch is submitted with duplicates and standards to monitor laboratory quality. Total depth (end of hole) rounded to 1 decimal place for reporting purposes. Hole IDs denoted with a * previously reported in "Further Outstanding Drill Results at Havieron", dated 11 March 2020.
Hole ID | Hole Type | Easting (m) | Northing (m) | RL (m) | Total Depth (m) | Azimuth | Dip | From (m) | To (m) | Interval (m) | Au (ppm) | Cu (pct) | Cut off |
HAD022* | MR-DD | 464345 | 7597648 | 258 | 901.6 | 270 | -60 | 534 | 676 | 142 | 1.9 | 0.38 | 0.2 g/t Au |
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| incl | 572.3 | 588 | 15.7 | 9.8 | 0.61 | 1.0 g/t Au |
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| incl | 574 | 575 | 1 | 34 | 1.4 | 30 g.m. Au |
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| and | 576 | 577 | 1 | 37 | 0.91 | 30 g.m. Au |
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| incl | 594.7 | 614.7 | 20 | 2.4 | 0.87 | 1.0 g/t Au |
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| incl | 620 | 636 | 16 | 1.5 | 0.52 | 1.0 g/t Au |
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| 688 | 730 | 42 | 0.48 | 0.16 | 0.2 g/t Au |
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| 755 | 792.2 | 37.2 | 1.4 | 0.29 | 0.2 g/t Au |
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| 804 | 897 | 93 | 1.1 | 0.11 | 0.2 g/t Au |
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| incl | 821 | 834.8 | 13.8 | 2.4 | 0.48 | 1.0 g/t Au |
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|
|
|
| incl | 867.3 | 868 | 0.7 | 50 | 2.2 | 30 g.m. Au |
HAD029* | MR-DD | 463597 | 7597701 | 260 | 1717.2 | 90 | -63 | 612 | 648 | 36 | 0.83 | 0.13 | 0.2 g/t Au |
|
|
|
|
|
|
|
| 660 | 747.8 | 87.8 | 0.29 | 0.10 | 0.2 g/t Au |
|
|
|
|
|
|
|
| 760 | 804.9 | 44.9 | 0.34 | 0.08 | 0.2 g/t Au |
|
|
|
|
|
|
|
| 837.6 | 991.4 | 153.8 | 0.66 | 0.08 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 931.9 | 933 | 1.1 | 32 | 0.35 | 30 g.m. Au |
|
|
|
|
|
|
|
| 1003.3 | 1110 | 106.7 | 1.8 | 0.02 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 1026 | 1041 | 15 | 2.6 | 0.05 | 1.0 g/t Au |
|
|
|
|
|
|
| incl | 1059.7 | 1060.5 | 0.8 | 95 | 0.15 | 30 g.m. Au |
|
|
|
|
|
|
| incl | 1077 | 1090.1 | 13.1 | 3.7 | 0.03 | 1.0 g/t Au |
|
|
|
|
|
|
|
| 1125.5 | 1192.4 | 66.9 | 0.21 | 0.05 | 0.2 g/t Au |
|
|
|
|
|
|
|
| 1217.4 | 1265 | 47.6 | 0.42 | 0.07 | 0.2 g/t Au |
|
|
|
|
|
|
|
| 1334.5 | 1363 | 28.5 | 2.2 | 0.12 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 1347.9 | 1360 | 12.1 | 4.5 | 0.25 | 1.0 g/t Au |
|
|
|
|
|
|
|
| 1460 | 1594.2 | 134.2 | 0.81 | 0.23 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 1473 | 1496 | 23 | 2.7 | 0.14 | 1.0 g/t Au |
HAD037* | MR | 464450 | 7597800 | 258 | 480.7 | 270 | -62 | Hole abandoned in cover sequence | |||||
HAD038* | MR-DD | 463849 | 7597850 | 257 | 949.2 | 90 | -62 | 451.3 | 661.7 | 210.4 | 0.32 | 0.07 | 0.2 g/t Au |
HAD039 | MR-DD | 464600 | 7597750 | 260 | 1278.9 | 266 | -60 | 693 | 779.6 | 86.6 | 2.8 | 0.37 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 710.9 | 738 | 27.1 | 4.4 | 0.74 | 1.0 g/t Au |
|
|
|
|
|
|
| incl | 715 | 716 | 1 | 62 | 1.1 | 30 g.m. Au |
|
|
|
|
|
|
| incl | 761 | 762 | 1 | 52 | 0.43 | 30 g.m. Au |
|
|
|
|
|
|
|
| 919.9 | 951 | 31.1 | 0.31 | 0.06 | 0.2 g/t Au |
|
|
|
|
|
|
|
| 1022 | 1147 | 125 | 2.1 | 0.05 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 1077 | 1078 | 1 | 47 | 0.27 | 30 g.m. Au |
|
|
|
|
|
|
| incl | 1103.9 | 1104.8 | 0.9 | 43 | 0.33 | 30 g.m. Au |
|
|
|
|
|
|
| incl | 1134 | 1145 | 11 | 7.5 | 0.11 | 1.0 g/t Au |
|
|
|
|
|
|
| incl | 1143.9 | 1144.2 | 0.3 | 129 | 0.16 | 30 g.m. Au |
|
|
|
|
|
|
|
| 1164 | 1227 | 63 | 3.1 | 0.14 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 1168 | 1168.9 | 0.9 | 33 | 0.28 | 30 g.m. Au |
|
|
|
|
|
|
| incl | 1202.1 | 1219.4 | 17.4 | 8.0 | 0.32 | 1.0 g/t Au |
|
|
|
|
|
|
| incl | 1205 | 1205.4 | 0.4 | 118 | 0.38 | 30 g.m. Au |
HAD039W2 | MR-DD | 464600 | 7597750 | 260 | 1278.9 | 266 | -60 | 668 | 816 | 148 | 2.7 | 0.45 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 700 | 753 | 53 | 6.2 | 0.71 | 1.0 g/t Au |
|
|
|
|
|
|
| incl | 711 | 712 | 1 | 97 | 1.1 | 30 g.m. Au |
HAD040* | MR-DD | 464000 | 7597703 | 258 | 75 | 270 | -60 | Hole abandoned in cover sequence | |||||
HAD041 | MR-DD | 463793 | 7597996 | 256 | 445 | 90 | -61 | Pre-collar only - in progress | |||||
HAD042* | MR-DD | 463749 | 7597397 | 261 | 1284.9 | 45 | -58 | 622.1 | 710.9 | 88.8 | 1.2 | 0.18 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 638 | 653.7 | 15.7 | 1.4 | 0.31 | 1.0 g/t Au |
|
|
|
|
|
|
| incl | 686 | 703 | 17 | 2.8 | 0.20 | 1.0 g/t Au |
|
|
|
|
|
|
|
| 734 | 858 | 124 | 3.9 | 0.21 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 737 | 751 | 14 | 4.7 | 0.30 | 1.0 g/t Au |
|
|
|
|
|
|
| incl | 790.7 | 808 | 17.3 | 19 | 0.62 | 1.0 g/t Au |
|
|
|
|
|
|
| incl | 804 | 807.1 | 3.1 | 91 | 2.0 | 30 g.m. Au |
|
|
|
|
|
|
| incl | 824 | 837.3 | 13.3 | 3.4 | 0.14 | 1.0 g/t Au |
|
|
|
|
|
|
| incl | 843 | 853 | 10 | 1.9 | 0.26 | 1.0 g/t Au |
|
|
|
|
|
|
|
| 877 | 930 | 53 | 0.45 | 0.04 | 0.2 g/t Au |
|
|
|
|
|
|
|
| 944.1 | 975 | 30.9 | 1.6 | 0.07 | 0.2 g/t Au |
|
|
|
|
|
|
|
| 1002.6 | 1050 | 47.4 | 0.26 | 0.07 | 0.2 g/t Au |
HAD043 | MR-DD | 463850 | 7597370 | 266 | 1160.4 | 45 | -58 | 608 | 775.4 | 167.4 | 2.4 | 0.66 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 626.7 | 641.5 | 14.8 | 1.3 | 1.4 | 1.0 g/t Au |
|
|
|
|
|
|
| incl | 679 | 693 | 14 | 2.1 | 1.1 | 1.0 g/t Au |
|
|
|
|
|
|
| incl | 712.3 | 735 | 22.8 | 9.3 | 0.96 | 1.0 g/t Au |
|
|
|
|
|
|
| incl | 723.4 | 724.6 | 1.2 | 37 | 0.89 | 30 g.m. Au |
|
|
|
|
|
|
| incl | 741.2 | 758.3 | 17.1 | 4.7 | 0.53 | 1.0 g/t Au |
|
|
|
|
|
|
| incl | 757 | 758.3 | 1.3 | 36 | 2.1 | 30 g.m. Au |
|
|
|
|
|
|
|
| 919 | 944 | 25 | 0.30 | 0.05 | 0.2 g/t Au |
|
|
|
|
|
|
|
| 986 | 1018.2 | 32.2 | 1.8 | 0.14 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 1005.3 | 1018.2 | 12.9 | 1.4 | 0.16 | 1.0 g/t Au |
HAD043W1 | MR-DD | 463850 | 7597370 | 266 | 1160.4 | 45 | -58 | 608 | 692 | 84 | 0.73 | 0.55 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 634.2 | 645.6 | 11.4 | 1.1 | 1.1 | 1.0 g/t Au |
|
|
|
|
|
|
| incl | 671 | 682 | 11 | 1.2 | 0.42 | 1.0 g/t Au |
|
|
|
|
|
|
|
| 768.2 | 834 | 65.8 | 2.0 | 0.63 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 768.2 | 779 | 10.8 | 1.9 | 2.3 | 1.0 g/t Au |
|
|
|
|
|
|
| incl | 790.1 | 791 | 1.0 | 61 | 0.87 | 30 g.m. Au |
|
|
|
|
|
|
| incl | 808 | 819.4 | 11.4 | 3.2 | 0.79 | 1.0 g/t Au |
|
|
|
|
|
|
|
| 852.5 | 881 | 28.5 | 4.7 | 0.28 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 861 | 873 | 12.1 | 11 | 0.39 | 1.0 g/t Au |
|
|
|
|
|
|
| incl | 865 | 866 | 1 | 54 | 0.04 | 30 g.m. Au |
|
|
|
|
|
|
|
| 896.4 | 939 | 42.7 | 3.4 | 0.38 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 913 | 930.8 | 17.8 | 6.5 | 0.70 | 1.0 g/t Au |
|
|
|
|
|
|
|
| 922 | 923 | 1 | 39 | 1.9 | 30 g.m. Au |
HAD044* | MR-DD | 464489 | 7597695 | 258 | 920.1 | 270 | -59 | 489.5 | 572.8 | 83.3 | 5.0 | 1.1 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 489.5 | 557.6 | 68.1 | 6.0 | 1.4 | 1.0 g/t Au |
|
|
|
|
|
|
| incl | 511 | 513 | 2 | 32 | 1.4 | 30 g.m. Au |
|
|
|
|
|
|
| and | 524 | 525 | 1 | 30 | 2.5 | 30 g.m. Au |
|
|
|
|
|
|
|
| 585 | 622 | 37 | 0.64 | 0.09 | 0.2 g/t Au |
|
|
|
|
|
|
|
| 848 | 880 | 32 | 0.37 | 0.16 | 0.2 g/t Au |
HAD045* | MR-DD | 464383 | 7598090 | 257 | 1176.5 | 225 | -55 | 634.3 | 786 | 151.7 | 0.60 | 0.08 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 649.2 | 661.5 | 12.3 | 1.7 | 0.30 | 1.0 g/t Au |
|
|
|
|
|
|
|
| 887.7 | 910 | 22.3 | 0.32 | 0.01 | 0.2 g/t Au |
|
|
|
|
|
|
|
| 922 | 957 | 35 | 0.27 | 0.01 | 0.2 g/t Au |
|
|
|
|
|
|
|
| 968 | 1004 | 36 | 2.9 | 0.03 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 1000 | 1001.2 | 1.2 | 84 | 0.22 | 30 g.m. Au |
|
|
|
|
|
|
|
| 1014.2 | 1036 | 21.8 | 0.51 | 0.02 | 0.2 g/t Au |
|
|
|
|
|
|
|
| 1070 | 1083 | 13 | 1.2 | 0.70 | 1.0 g/t Au |
HAD046 | MR-DD | 464273 | 7598202 | 257 | 440 | 225 | -62 | Pre-collar only - in progress | |||||
HAD047* | MR-DD | 464320 | 7598168 | 257 | 741.7 | 225 | -55 | 533 | 578 | 45 | 0.36 | 0.05 | 0.2 g/t Au |
HAD048 | MR-DD | 464274 | 7598204 | 257 | 425.2 | 225 | -67 | Pre-collar only - in progress | |||||
HAD049* | MR-DD | 464400 | 7597750 | 260 | 684.8 | 270 | -67 | 461 | 543 | 82 | 6.1 | 0.41 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 461.2 | 496 | 34.8 | 9.2 | 0.64 | 1.0 g/t Au |
|
|
|
|
|
|
|
| 462 | 463.2 | 1.2 | 43 | 0.01 | 30 g.m. Au |
|
|
|
|
|
|
|
| 466 | 467 | 1 | 110 | 0.02 | 30 g.m. Au |
|
|
|
|
|
|
|
| 512 | 512.7 | 0.7 | 63 | 2.3 | 30 g.m. Au |
|
|
|
|
|
|
|
| 540.2 | 540.7 | 0.5 | 159 | 0.83 | 30 g.m. Au |
|
|
|
|
|
|
|
| 569 | 592 | 23 | 0.30 | 0.04 | 0.2 g/t Au |
HAD050 | MR-DD | 463651 | 7597429 | 265 | 1180 | 45 | -54 | 615 | 692.3 | 77.3 | 1.1 | 0.09 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 635 | 647 | 12 | 3.5 | 0.36 | 1.0 g/t Au |
|
|
|
|
|
|
|
| 706 | 707 | 1 | 49 | 0.15 | 30 g.m. Au |
|
|
|
|
|
|
|
| 870.9 | 897 | 26.1 | 0.34 | 0.27 | 0.2 g/t Au |
|
|
|
|
|
|
|
| 1143 | 1165 | 22 | 0.31 | 0.01 | 0.2 g/t Au |
HAD051 | MR-DD | 464351 | 7597486 | 258 | 1033.1 | 302 | -63 | 508 | 545 | 37 | 3.6 | 1.1 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 517 | 534 | 17 | 7.5 | 2.1 | 1.0 g/t Au |
|
|
|
|
|
|
| incl | 528 | 529.2 | 1.2 | 62 | 1.6 | 30 g.m. Au |
|
|
|
|
|
|
|
| 555.1 | 569 | 13.9 | 4.3 | 0.72 | 1.0 g/t Au |
|
|
|
|
|
|
|
| 636.7 | 721.1 | 84.5 | 0.58 | 0.15 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 662 | 673.8 | 11.8 | 2.4 | 0.50 | 1.0 g/t Au |
|
|
|
|
|
|
|
| 734.83 | 785 | 50.2 | 0.29 | 0.16 | 0.2 g/t Au |
|
|
|
|
|
|
|
| 801 | 821 | 20 | 0.27 | 0.14 | 0.2 g/t Au |
|
|
|
|
|
|
|
| 860.2 | 888 | 27.8 | 0.48 | 0.07 | 0.2 g/t Au |
|
|
|
|
|
|
|
| 990.6 | 1033.1 | 42.5 | 0.27 | 0.04 | 0.2 g/t Au |
HAD052 | MR-DD | 464415 | 7597490 | 259 | 915.7 | 307 | -67 | 563 | 797 | 234 | 1.7 | 0.29 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 614.2 | 676.1 | 62 | 3.8 | 0.50 | 1.0 g/t Au |
|
|
|
|
|
|
| incl | 635 | 636.1 | 1.1 | 38 | 1.8 | 30 g.m. Au |
|
|
|
|
|
|
| incl | 648.7 | 649.8 | 1.0 | 34 | 1.1 | 30 g.m. Au |
|
|
|
|
|
|
| incl | 654.4 | 655.1 | 0.72 | 57 | 1.4 | 30 g.m. Au |
|
|
|
|
|
|
| incl | 762.8 | 775 | 12.2 | 2.1 | 0.19 | 1.0 g/t Au |
|
|
|
|
|
|
| incl | 782 | 797 | 15 | 3.6 | 0.44 | 1.0 g/t Au |
|
|
|
|
|
|
|
| 856 | 896 | 40 | 5.0 | 0.20 | 0.2 g/t Au |
|
|
|
|
|
|
| incl | 865 | 879 | 14 | 14 | 0.23 | 1.0 g/t Au |
|
|
|
|
|
|
| incl | 868 | 870 | 2 | 68 | 0.49 | 30 g.m. Au |
* previously reported 11 March 2020