08:00 Tue 10 Sep 2019
Greatland Gold PLC - Update on Newcrest Drilling Results at Havieron
Dissemination of a Regulatory Announcement that contains inside information according to REGULATION (EU) No 596/2014 (MAR).
("Greatland" or "the Company")
Update on Newcrest Drilling Results at Havieron
Summary
· Further excellent drill results from
· Each of drill holes HAD012, HAD013 and HAD014 intersected significant widths of mineralisation (in excess of 100m at better than 2g/t gold) and higher-grade zones within those intersections, including an interval of 43m @ 7.9g/t Au, 0.83% Cu from 900m in HAD012.
·
Greatland notes the release of an ASX announcement titled "Exploration Update - Havieron" by Newcrest Mining Ltd ("
Four drill rigs are currently operational, and six holes have been completed to date (HAD006 extension, HAD010-014) for a total of 6,166m of drilling. Final assay results have been received for HAD011, HAD012, HAD013 and HAD014 and are announced today.
Highlights of Drill Results:
· HAD012: Hole HAD012 intersected mineralisation approximately 100 metres north of HAD005, assay results include:
o 139.4m @ 2.9g/t Au, 0.39% Cu from 865.7m, including
§ 43m @ 7.9g/t Au, 0.83% Cu from 900m
o 27m @ 0.99g/t Au, 0.10% Cu from 1,056m, including
§ 10m @ 2.5g/t Au, 0.20% Cu from 1,056m
· HAD013: Hole HAD013 intersected mineralisation approximately 50 metres north of HAD005 and extended the known mineralisation to the west, assays results include:
o 100.9m @ 2.0g/t Au, 0.48% Cu from 479m, including
§ 36m @ 4.1g/t Au, 0.84% Cu from 481m
o 162.3m @ 0.89g/t Au, 0.17% Cu from 712m, including
§ 10.2m @ 2.5g/t Au, 0.69% Cu from 725.7m, and
§ 15.3m @ 2.2g/t Au, 0.17% Cu from 855m
o 146.1m @ 0.93g/t Au, 0.10% Cu from 917.9m
· HAD014: Hole HAD014 intersected mineralisation to the west of and below hole HAD005, assays results include:
o 244.6m @ 2.0g/t Au, 0.40% Cu from 450m, including
§ 29.3m @ 4.0g/t Au, 0.86% Cu from 465m, and
§ 22.4m @ 4.3g/t Au and 0.82% Cu from 557m
o 75.3m @ 3.4g/t Au, 0.43% Cu from 816.6m, including
§ 13.2m @ 16g/t Au and 0.93% Cu from 859.3m
· HAD011: There were no significant intersections from 903.8m to end of hole. All significant intersections in the upper zone to 903.8m were previously reported in the announcement released by the Company on
· A further five holes are at various stages of progress (HAD015-019) and assay results are awaited.
Next steps for Havieron:
· Phase 2 drilling programme initiated, which includes plans for a significant increase in the amount of both step out and infill drilling.
· A fifth drill rig is expected to commence operation in
· The Havieron camp is currently being upgraded to provide additional facilities and Telfer continues to provide support to the project.
·
"From a technical perspective, there are a number of positives contained within these results that I would highlight. First, each of drill holes HAD012, HAD013 and HAD014 intersected significant widths of mineralisation (in excess of 100m at better than 2g/t gold) and higher-grade zones within those intersections, including an interval of 43m @ 7.9g/t Au, 0.83% Cu from 900m in HAD012. Second, each of the three drill holes above extended the known mineralised envelope of the system, primarily to the north and the west. Third, these results establish a new peak gold grade for the system of 324.9g/t gold (in excess of 10 ounces of gold per tonne).
"We are very pleased that
Background to Havieron and Farm-in Agreement with
In
Greatland's Paterson project covers more than 385 square kilometres in the Paterson region of
Limited historical drilling was conducted by Newcrest Mining Limited at Havieron during the 1990s and early 2000s where six holes were drilled, all of which intersected significant alteration and gold plus copper anomalism. Thick lower grade zones of gold and copper were intersected by
Greatland's drilling campaigns at Havieron during 2018 yielded excellent results, including:
· HAD001: 121m @ 2.9g/t Au and 0.23% Cu from 497m.
· HAD003: 21m @ 3.8g/t Au and 0.44% Cu from 418m.
· HAD005: 103m @ 3.5g/t Au and 0.93% Cu from 459m and;
128m@ 7.4g/t Au and 0.54% Cu from 660m.
· HAD006: 54m @ 2.7g/t Au and 0.79% Cu from 471m and;
179.1m @ 1.4g/t Au and 0.47% Cu from 547.9m.
· HAD008: 67m @ 2.0g/t Au and 0.91% Cu from 426m.
A regional map showing the Havieron licence area with regional targets and adjacent landholdings can be found at: www.greatlandgold.com/paterson/
Newcrest Drilling and Operations at Havieron
Six drill holes have been completed to date by
Hole HAD011 (upper zone to 903.8m previously reported
Hole HAD012 intersected mineralisation approximately 100 metres north of HAD005. Assay results returned include:
· HAD012: 139.4m @ 2.9g/t Au, 0.39% Cu from 865.7m
incl 43m @ 7.9g/t Au, 0.83% Cu from 900m
27m @ 0.99g/t Au, 0.10% Cu from 1056m
incl 10m @ 2.5g/t Au, 0.20% Cu from 1056m
Hole HAD013 intersected mineralisation approximately 50 metres north of HAD005 and extended the known mineralisation to the west. Assay results returned include:
· HAD013: 100.9m @ 2.0g/t Au, 0.48% Cu from 479m
incl 36m @ 4.1g/t Au, 0.84% Cu from 481m
162.3m @ 0.89g/t Au, 0.17% Cu from 712m
incl 10.2m @ 2.5g/t Au, 0.69% Cu from 725.7m
and 15.3m @ 2.2g/t Au, 0.17% Cu from 855m
146.1m @ 0.93g/t Au, 0.10% Cu from 917.9m
Hole HAD014 intersected mineralisation to the west of and below hole HAD005. Assay results returned include:
· HAD014: 244.6m @ 2.0g/t Au, 0.40% Cu from 450m
incl 29.3m @ 4.0g/t Au, 0.86% Cu from 465m
and 22.4m @ 4.3g/t Au and 0.82% Cu from 557m
75.3m @ 3.4g/t Au, 0.43% Cu from 816.6m
incl 13.2m @ 16g/t Au and 0.93% Cu from 859.3m
Results from drill holes HAD012 through HAD014 are considered outstanding. Higher-grade mineralised zones have been defined with new peak gold of 324.9g/t. Results have defined a series of higher-grade zones within a broad envelope of mineralisation and have extended mineralisation a further 100 metres to the north with the system remaining open.
Additional drill hole information is presented in Appendix I and tabulated drill hole intercepts are presented 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 at www.greatlandgold.com/media/jorc
Newcrest will complete Phase 1 drilling in September and commence Phase 2. Phase 2 includes plans for a significant increase in the amount of both step out and infill drilling. The newly operational Havieron camp is currently being upgraded to provide additional facilities. Telfer continues to provide support to the project.
Newcrest's minimum expenditure commitment (USD
Competent Person:
Information in this announcement that relates to Havieron exploration results has been extracted from the following announcements:
"Exploration Update - Havieron", dated
"Newcrest Quarterly Exploration Report -
Information in this announcement, which has been taken from
Enquiries:
Greatland Gold PLC
Gervaise Heddle/Callum Baxter
Tel: +44 (0)20 3709 4900
Email: info@greatlandgold.com
Andrew Emmott/James Keeshan
Tel: +44 (0)20 3368 3550
Nick Emerson/Alan Gunn
Tel: +44 (0)14 8341 3500
Matthew Hasson/John Prior/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:
The Company has six main projects; four situated in Western Australia and two in Tasmania. All projects are 100% owned by Greatland.
In
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
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 6 m 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), 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 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 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. Due to the limited extent of the drilling program to date, extended quality control programs are yet to be undertaken, whereby pulped samples will be 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. |
Location of data points |
Drill collar locations were surveyed using a differential GPS with GNSS with a stated accuracy of +/- 0.5m (HAD012) and Handheld GPS with +/-3 m accuracy (HAD013 & HAD014). 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 m in diamond drill core segments of the drill hole. At the end of hole, all holes have been surveyed using a continuous gyro survey to surface (Axis Mining Champ Gyro). 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 ( |
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 |
Drilling of reported holes HAD012, HAD013 and HAD014 are oriented perpendicular to a central dolerite dyke. The dolerite dyke has a north-south orientation, with drilling established on an east-west orientation. 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. Steeply dipping mineralised zones with a north-south orientation have been interpreted from historic and Newcrest drill holes. There is presently insufficient information to confirm the geological model or true thickness of mineralised intervals. |
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 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 |
There is a current ILUA (Indigenous Land Use Agreement) signed in All obligations with respect to legislative requirements including minimum expenditure are maintained in good standing. The exploration licence E45/4701 was first granted 17th |
Exploration done by other parties |
Drilling has defined an intrusion-related mineral system with evidence of breccia- and massive sulphide-hosted higher-grade gold-copper mineralisation. |
Geology |
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. |
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. No top cuts are applied to intercept calculations. |
Relationship between mineralisation widths and intercept lengths |
Significant assay intervals reported represent apparent widths. Insufficient geological information is available to confirm the geological model and true width of significant assay intervals. |
Diagrams |
As provided. |
Balanced reporting |
This is the second release of Exploration Results for this project made by Newcrest. The initial Newcrest release is dated the 25th |
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 not been closed off. Drilling programs at Havieron are ongoing, with additional drill rig(s) scheduled to commence in the Q2 FY20. |
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 20m. Also highlighted are high grade intervals of Au >1.0ppm (1g/t Au) or Cu >5000ppm (0.5%), and minimum 10m downhole width with maximum consecutive internal dilution of 10m. Au grades are reported to two significant figures.
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 |
|
HAD012 |
MR-DD |
463803 |
7597709 |
258 |
1157 |
90 |
-65 |
509.9 |
540.1 |
30.2 |
0.25 |
0.02 |
0.2g/t Au |
|
HAD012 |
|
|
|
|
|
|
|
865.7 |
1005 |
139.4 |
2.9 |
0.39 |
0.2g/t Au |
|
HAD012 |
|
|
|
|
|
|
Incl |
900 |
943 |
43 |
7.9 |
0.83 |
1.0g/t Au |
|
HAD012 |
|
|
|
|
|
|
|
1056 |
1083 |
27 |
0.99 |
0.10 |
0.2g/t Au |
|
HAD012 |
|
|
|
|
|
|
Incl |
1056 |
1066 |
10 |
2.5 |
0.20 |
1.0g/t Au |
|
HAD013 |
MR-DD |
464435 |
7597650 |
263 |
1254 |
270 |
-65 |
479 |
579.9 |
100.9 |
2.0 |
0.48 |
0.2g/t Au |
|
HAD013 |
|
|
|
|
|
|
Incl |
481 |
517 |
36 |
4.1 |
0.84 |
1.0g/t Au |
|
HAD013 |
|
|
|
|
|
|
Incl |
525 |
535 |
10 |
2.0 |
0.72 |
1.0g/t Au |
|
HAD013 |
|
|
|
|
|
|
Incl |
550 |
561 |
11 |
1.3 |
0.18 |
1.0g/t Au |
|
HAD013 |
|
|
|
|
|
|
|
590 |
647 |
57 |
0.47 |
0.28 |
0.2g/t Au |
|
HAD013 |
|
|
|
|
|
|
|
712 |
874.3 |
162.3 |
0.89 |
0.17 |
0.2g/t Au |
|
HAD013 |
|
|
|
|
|
|
Incl |
725.7 |
735.8 |
10.2 |
2.5 |
0.69 |
1.0g/t Au |
|
HAD013 |
|
|
|
|
|
|
Incl |
855 |
870.3 |
15.3 |
2.2 |
0.17 |
1.0g/t Au |
|
HAD013 |
|
|
|
|
|
|
|
917.9 |
1064 |
146.1 |
0.93 |
0.10 |
0.2g/t Au |
|
HAD013 |
|
|
|
|
|
|
|
1128 |
1149.8 |
21.8 |
0.25 |
0.02 |
0.2g/t Au |
|
HAD014 |
MR-DD |
463835 |
7597653 |
266 |
955 |
90 |
-65 |
450 |
694.6 |
244.6 |
2.0 |
0.40 |
0.2g/t Au |
|
HAD014 |
|
|
|
|
|
|
Incl |
465 |
494.3 |
29.3 |
4.0 |
0.86 |
1.0g/t Au |
|
HAD014 |
|
|
|
|
|
|
Incl |
539 |
549 |
10 |
2.7 |
0.53 |
1.0g/t Au |
|
HAD014 |
|
|
|
|
|
|
Incl |
557 |
579.4 |
22.4 |
4.3 |
0.82 |
1.0g/t Au |
|
HAD014 |
|
|
|
|
|
|
|
705 |
731.6 |
26.6 |
0.99 |
0.81 |
0.2g/t Au |
|
HAD014 |
|
|
|
|
|
|
|
816.6 |
891.9 |
75.3 |
3.4 |
0.43 |
0.2g/t Au |
|
HAD014 |
|
|
|
|
|
|
Incl |
859.3 |
872.5 |
13.2 |
16.0 |
0.93 |
1.0g/t Au |
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