RNS Number : 4676A
Greatland Gold PLC
21 January 2020
21 January 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")
Final Results from Firetower Drilling Programme
Gold, silver and zinc mineralisation intersected at Firetower East underscore potential for a new VHMS system with
precious metal content
Greatland Gold plc (AIM:GGP), the precious and base metals exploration and development company, is pleased to announce final results from diamond drilling at the Company's 100% owned Firetower project in Tasmania, Australia.
In 2019, the Company completed a systematic, grid-based drilling programme at Firetower, comprising 14 diamond holes with depths from 50m to 160m, for a total of approximately 1,530m. The programme was designed to test the main zone of gold mineralisation and results to date have confirmed broad widths of gold mineralisation (see announcements dated 24 September and 17 December 2019).
In addition to this programme, two further holes for a total of approximately 670m were drilled to test new targets identified as strong chargeability responses by a 3D Induced Polarisation ("3DIP") survey conducted in 2018 at Firetower East, approximately 500m east of Firetower.
Analytical results for the final two diamond holes (foremostly the second hole at Firetower East) have been received and are reported in this announcement.
Highlights of Drill Results
Firetower East
- Zinc, gold and silver mineralisation has been intersected in the second drill hole at Firetower East, underscoring the potential for a Volcanic Hosted Massive Sulphide ("VHMS") system with precious metal content in addition to base metals.
- Significant results from the second hole at Firetower East (2019FTD016) include 31m at 2,581ppm Zn from 184m, including 3m at 8,745ppm Zn from 191m, and 1m at 2.1g/t Au from 224m.
Firetower
-
Results from the final hole at the main Firetower prospect (2019FTD015) ( 1m at 0.54g/t Au from 119m) complete a
2019 drilling campaign that has:
o Confirmed good continuity of mineralisation;
o Defined mineralisation over a strike length of more than 200m, with mineralisation remaining open along strike to the east and west of Firetower;
o Demonstrated a robust southerly dipping mineralised zone up to 50m wide, persisting to depths of 125m and which remains open at depth.
Gervaise Heddle, Chief Executive Officer, commented: "These results finalise a positive set of overall drilling results from our 2019 Firetower campaign. By confirming continuity of mineralisation over an extensive strike length of more than 200m, we have successfully moved the project up the value curve.
"We are also particularly pleased that our first drill programme at Firetower East has now clearly demonstrated the potential for a VHMS system. The intersection of new base metal and gold mineralisation 500m east of Firetower has immediately created prospective new target zones between and along strike from the two prospects.
"The results act as further evidence of the strength of our portfolio and provide us with well defined parameters for further exploration at the Firetower and Firetower East prospects."
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/
Overview of the Firetower Project
The Firetower project is located in central north Tasmania, Australia, and covers an area of 62 square kilometres. The project lies in the eastern parts of the highly mineralised Mt Read volcanic rocks which host major polymetallic (zinc, lead, gold) deposits such as Hellyer and Roseberry, and copper deposits such as Mt Lyell, and the Henty gold mine which has produced over 1.25m oz since 1996.
The 100% owned Firetower project includes the prospects of Firetower, Firetower West, Firetower East and the strike extensions of prospective stratigraphy. The Firetower prospect has significant gold mineralisation from surface up to 30g/t while the mineralised system at Firetower West shows copper to 1.34% and silver to 2.6g/t. Both prospects remain open along strike and at depth.
Gold mineralisation at Firetower was first located in the late 1970s but this was not followed up until the early 1990s with reconnaissance drilling. More modern exploration by Greatland and JV partners has included soil geochemistry, geophysics and diamond drilling. Drilling to date has, in general, tested approximately 250m of strike at the main Firetower prospect. A primary objective of the 2019 drilling was to determine strike continuity and depth extensions as guided by 3DIP inversions.
Page 1 of 9
The 2019 diamond drilling programme is complete. Results for the final 2 holes have been received and announced today. Previous results were announced on 24 September and 17 December 2019.
At the Firetower prospect, drilling was carried out on systematic north-south traverses across the main mineralised zone. The programme comprised 14 holes with depths from 50m to 160m. Holes were angled at 60 degrees to provide coverage across each section. Approximately 1,530m of drilling was completed at the Firetower prospect. Spacing between drill traverses was a nominal 25m.
Two holes were drilled at the Firetower East prospect for a total of 670m testing a strong IP chargeability response, approximately 500m east along strike from the Firetower prospect.
The main zone of gold mineralisation at the Firetower prospect is spatially associated with an IP chargeability response. The IP response at Firetower, as established by both 3DIP (2018) and gradient array (2002) surveys, extends across approximately 3km of strike. The IP response at Firetower East (approximately 500m east of Firetower) appears to correspond with base metal mineralisation, in a package of volcanoclastic rocks.
Mineralisation at the Firetower prospect is hosted in a package of volcanic and sedimentary rocks with an apparent structural control. Results suggest that there is good continuity of mineralisation between sections and highlights potential depth extensions to the known mineralisation. Results from the final hole (2019FTD015) at Firetower are reported today and significant intercepts include 1m at 0.54g/t Au from 119m. Mineralisation remains open at depth and along strike to the east and west.
Results from the second hole at the Firetower East prospect confirm the potential for a VHMS style mineralised system. Assays indicate broad zones of zinc mineralisation with added precious metal content (Au). Significant results include 31m at 2581ppm Zn from 184m including 3m at 8745ppm Zn from 191m, and 1m at 2.1g/t Au from 224m (2019FTD016).
Significant assay results:
- 2019FTD015: 1m @ 0.54g/t Au from 119m
- 2019FTD016: 7m @ 0.18g/t Au from 208m
Incl 1m @ 0.61g/t Au from 208m and
1m @ 2.1g/t Au from 224m and
3m @ 0.37g/t Au from 231m
-
2019FTD016: 31m @ 2581ppm Zn from 184m Incl 3m @ 8745ppm Zn from 191m and 21m @ 1456ppm Zn from 223m and 10m @ 1790ppm Zn from 280m and 5m @ 1106ppm Zn from 311m
Incl 1m @ 3425ppm Zn from 315m
Drill hole collar details and tabulated intercepts are presented in Appendix I and additional drill hole information is presented in Appendix II.
Diamond drilling during 2019 at the Firetower prospect has been successful in achieving its objective of demonstrating continuity of mineralisation. Gold mineralisation has been defined over a strike length of more than 200m which remains open along strike to the east and west. The drilling has also demonstrated a robust southerly dipping mineralised zone up to 50m wide persisting to depths of 125m which remains open. Systematic grid based drilling has significantly increased the understanding of geology and controls on mineralisation.
Step out exploration drilling at Firetower East was successful in intersecting new base metal and gold mineralisation 500m east of the Firetower prospect. This immediately represents a new target zone between the two prospects.
Further work will include detailed review of geological, geochemical and geophysical data sets focussing on the prospective area between the Firetower and Firetower East prospects, along with immediate strike extensions to the currently defined gold mineralised zones.
Competent Person:
Information in this announcement that relates to exploration results is based on information compiled by Mr Mick Sawyer who is a member of the Australian Institute of Geoscientists and is a Registered Professional Geoscientist (R.P.Geo #10194). 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 has been undertaken 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. Mr Sawyer consents to the inclusion in the announcement of the matters based on their information in the form and context in which it appears.
Information in this announcement that relates to exploration results has been extracted from the following announcements:
"Firetower Drilling - Further Gold Mineralization", dated 17 December 2019 "Exploration Update - Firetower Drill Results", dated 24 September 2019 "Greatland Commences Field Activities at Firetower", dated 12 June 2019 "Firetower Project - Launch of New Drilling Plan", dated 16 April 2019
Page 2 of 9
"Firetower Project - Large IP Target Identified", dated 20 August 2018 "Firetower Project - New Exploration Program", dated 11 April 2018
Additional information on the Firetower project can be found on the Company web site at
www.greatlandgold.com/projects.
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 gold, copper and nickel exploration projects.
The Company has six main projects; four situated in Western Australia and two in Tasmania. All projects are 100% owned by Greatland.
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 project in the Paterson region of Western Australia. Newcrest has the right to acquire 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
DRILLHOLE DATA - Firetower Project
Firetower and Firetower East 2019 Diamond Drilling - Collar Locations (GDA94 Zone55)
Hole ID | Prospect | Northing | Easting | RL | Hole | Azimuth | Dip |
Depth | |||||||
2019FTD015 | Firetower | 5405185 | 446148 | 610 | 157 | 360 | -60 |
2019FTD016 | Firetower | 5405090 | 446680 | 599 | 317 | 360 | -60 |
East | |||||||
Firetower and Firetower East 2019 Diamond Drilling - Intercepts
Reporting Criteria: Intercepts reported as a minimum length of 1m, greater than or equal to 0.20ppm Au, with maximum internal dilution of 4m and intervals greater than or equal to 0.50ppm Au with zero metres of internal dilution.
Hole ID | From | To | Interval | Au g/t | Ag |
ppm | |||||
2019FTD015 | 119 | 120 | 1 | 0.54 | 7.7 |
2019FTD016 | 95 | 96 | 1 | 0.26 | 0.1 |
2019FTD016 | 208 | 215 | 7 | 0.18 | 2.2 |
Incl | 208 | 209 | 1 | 0.61 | 4.4 |
2019FTD016 | 224 | 225 | 1 | 2.1 | 1.2 |
2019FTD016 | 231 | 234 | 3 | 0.37 | 1.3 |
Incl | 232 | 233 | 1 | 0.55 | 1.0 |
Page 3 of 9
Reporting Criteria: 2019FTD016 intercepts reported as minimum length of 1m, greater than or equal to 500ppm Zn, with maximum internal dilution of 4m and intervals greater than or equal to 2000ppm Zn with zero metres of internal dilution.
Hole ID | From | To | Interval | Zn | Au g/t | Ag |
ppm | ppm | |||||
2019FTD016 | 158 | 165 | 7 | 1501 | 0.02 | 0.6 |
Incl | 158 | 159 | 1 | 3008 | 0.01 | 0.7 |
Incl | 163 | 164 | 1 | 3454 | 0.01 | 0.8 |
2019FTD016 | 184 | 215 | 31 | 2581 | 0.06 | 1.6 |
Incl | 191 | 194 | 3 | 8745 | 0.03 | 2.5 |
Incl | 195 | 196 | 1 | 3481 | 0.06 | 0.9 |
Incl | 197 | 198 | 1 | 4991 | 0.13 | 4.0 |
Incl | 201 | 203 | 2 | 5803 | 0.01 | 1.7 |
Incl | 206 | 208 | 2 | 5652 | 0.01 | 2.5 |
Incl | 211 | 212.2 | 1.2 | 2305 | 0.02 | 2.1 |
2019FTD016 | 223 | 244 | 21 | 1456 | 0.20 | 0.9 |
Incl | 228 | 230 | 2 | 3207 | 0.08 | 1.1 |
Incl | 232 | 235 | 3 | 3370 | 0.31 | 1.6 |
2019FTD016 | 252 | 254 | 2 | 769 | 0.08 | 2.4 |
2019FTD016 | 266 | 267 | 1 | 1346 | 0.05 | 2.2 |
2019FTD016 | 272 | 275 | 3 | 603 | 0.01 | 0.9 |
2019FTD016 | 280 | 290 | 10 | 1790 | 0.01 | 1.3 |
Incl | 280 | 281 | 1 | 4734 | 0.01 | 1.4 |
Incl | 283 | 284 | 1 | 2197 | 0.01 | 2.4 |
Incl | 289 | 290 | 1 | 3697 | 0.01 | 3.7 |
2019FTD016 | 311 | 316 | 5 | 1106 | 0.03 | 0.4 |
Incl | 315 | 316 | 1 | 3425 | 0.01 | 0.5 |
APPENDIX II
JORC Code 2012 Table 1 - Firetower Project
Section 1 Sampling Techniques and Data
(Criteria in this section apply to all succeeding sections.)
Criteria | Explanation | ||||||||||||||||||||
Sampling | • | Nature and | quality of | 2019 Diamond Drilling | |||||||||||||||||
techniques | sampling | (eg | cut channels, | · | Assays have been received for a | ||||||||||||||||
random | chips, | or | specific | further 2 holes. All | 16 holes of | ||||||||||||||||
s p e c i a l i s e d industry | the 2020 program have now | ||||||||||||||||||||
standard measurement tools | been | reported. | In | aggregate, | |||||||||||||||||
appropriate to the minerals | ~2,200m | of | drilling | was | |||||||||||||||||
under investigation, such as | completed with 14 holes at | ||||||||||||||||||||
down hole gamma | sondes, | Firetower and 2 holes at | |||||||||||||||||||
or | handheld | XRF | · | Firetower East. | |||||||||||||||||
instruments, | etc). | These | Samples consist of diamond drill | ||||||||||||||||||
examples | s h o u l d not | be | core (HQ and NQ sizes) cut in | ||||||||||||||||||
taken as limiting the broad | · | half. | |||||||||||||||||||
meaning of sampling. | All available core was cut and | ||||||||||||||||||||
• | Include | reference | to | sampled. | Sampling | interval is | |||||||||||||||
generally 1m or 0.5m, but | |||||||||||||||||||||
measures | taken | to | ensure | respects | geological | contacts in | |||||||||||||||
sample | representivity | and | places. | Sampling | was | carried | |||||||||||||||
the appropriate calibration | out | to | Greatland | internal | |||||||||||||||||
of any measurement tools or | protocols and QAQC procedures. | ||||||||||||||||||||
• | systems used. | of | the | · | Entire samples were crushed | ||||||||||||||||
Aspects | then pulverised to a nominal 85% | ||||||||||||||||||||
determination | of | passing | 75 | microns. | The | ||||||||||||||||
that | resulting pulps were analysed for | ||||||||||||||||||||
mineralisation | are | Au (50g charge, fire assay) and | |||||||||||||||||||
Material | to | the | Public | multi-element geochemistry (four | |||||||||||||||||
acid digest ICP-MS). | |||||||||||||||||||||
R e p o r t . I | n cases | where | · | The method of sampling is | |||||||||||||||||
'industry standard' work has | industry standard for reporting of | ||||||||||||||||||||
Exploration Results. | |||||||||||||||||||||
been | done this | would | be | · | Locations | and | orientation of | ||||||||||||||
relatively | simple | (eg | 2019 drill holes for this release | ||||||||||||||||||
are tabulated in Appendix I. | |||||||||||||||||||||
'reverse | circulation | drilling | |||||||||||||||||||
was used to obtain 1 m | |||||||||||||||||||||
samples from which 3 kg | |||||||||||||||||||||
was pulverised to produce a | |||||||||||||||||||||
30 g charge for fire assay'). | |||||||||||||||||||||
In | other | cases | more | ||||||||||||||||||
explanation | may | be | |||||||||||||||||||
required, | such | as | where | ||||||||||||||||||
there is coarse gold that has | |||||||||||||||||||||
inherent sampling problems. | |||||||||||||||||||||
U n u s u a l commodities | or | ||||||||||||||||||||
mineralisation | types | (eg | |||||||||||||||||||
submarine | nodules) | may | |||||||||||||||||||
warrant | disclosure | of | |||||||||||||||||||
detailed information. | |||||||||||||||||||||
Drilling | • | Drill type (eg core, reverse | Diamond Drilling | ||||||||||||||||||
techniques | circulation, | open-hole | · | Drilling was undertaken | |||||||||||||||||
hammer, | rotary | air | blast, | using | a | track | mounted | ||||||||||||||
auger, | Bangka, | sonic, | etc) | Coretech | CSD1800 | drill | |||||||||||||||
and | details | (eg | core | rig. | The | drill | rig | is | |||||||||||||
capable of ~1000m NQ. | |||||||||||||||||||||
diameter, triple or standard | |||||||||||||||||||||
· | Drill holes were cased | ||||||||||||||||||||
tube, depth of diamond tails, | |||||||||||||||||||||
face-sampling | bit or | other | with HWT casing to ~3m. | ||||||||||||||||||
HQ sized drill core from | |||||||||||||||||||||
type, | whether | core | is | ||||||||||||||||||
0m to ~20m followed by | |||||||||||||||||||||
oriented and if so, by what | NQ drill core from 20m to | ||||||||||||||||||||
method, etc). | end of hole. | ||||||||||||||||||||
Drill | • | Method of recording and | · | Length | based | core | |||||||||||||||
sample | |||||||||||||||||||||
recovery | assessing core and chip | recovery | is | measured | |||||||||||||||||
sample recoveries and | from | reassembled | core | ||||||||||||||||||
Page 4 of 9
results assessed. | for every drill run. | Data | |||||||||||||||||
• | Measures taken to | is | recorded | into laptop | |||||||||||||||
maximise sample recovery | computer using 'LogChief' | ||||||||||||||||||
- | geological | logging | |||||||||||||||||
and ensure representative | |||||||||||||||||||
software. | |||||||||||||||||||
nature of the samples. | |||||||||||||||||||
• | · | Core recovery is very | |||||||||||||||||
Whether a relationship | |||||||||||||||||||
exists between sample | high | (97%). | The drilling | ||||||||||||||||
method | employed | leads | |||||||||||||||||
recovery and grade and | |||||||||||||||||||
to very high recoveries. | |||||||||||||||||||
whether sample bias may | · | Due to consistently high | |||||||||||||||||
have occurred due to | |||||||||||||||||||
recoveries, | no | ||||||||||||||||||
preferential loss/gain of | |||||||||||||||||||
relationship | between | ||||||||||||||||||
fine/coarse material. | grade | and | recovery | is | |||||||||||||||
evident. | |||||||||||||||||||
Logging | • | Whether core and | chip | · | All | drill | core/samples | ||||||||||||
samples | have | been | were geologically logged | ||||||||||||||||
geologically | logged | and | |||||||||||||||||
geotechnically | to | a | for lithology, mineralogy, | ||||||||||||||||
level of detail to support | alteration, | veining, | |||||||||||||||||
appropriate | Mineral | sulphide | occurrences, | ||||||||||||||||
Resource estimation, mining | |||||||||||||||||||
studies | and | metallurgical | structure | data. | and | ||||||||||||||
• | studies. | logging | is | geotechnical | This | ||||||||||||||
Whether | logging | includes | both | ||||||||||||||||
qualitative or quantitative in | qualitative | and | |||||||||||||||||
nature. | Core (or | costean, | quantitative | ||||||||||||||||
• | channel, etc) photography. | ||||||||||||||||||
The total length and | components. | All core is | |||||||||||||||||
percentage of the relevant | digitally photographed. | ||||||||||||||||||
· | Logging | is | recorded | ||||||||||||||||
intersections logged. | |||||||||||||||||||
directly | into | a | laptop | ||||||||||||||||
computer using 'LogChief' | |||||||||||||||||||
- | geological | logging | |||||||||||||||||
software. | This | software | |||||||||||||||||
has 'look-up tables' that | |||||||||||||||||||
do not allow for invalid | |||||||||||||||||||
entries. | Additional | ||||||||||||||||||
validation is then carried | |||||||||||||||||||
out | when | data | is | ||||||||||||||||
transferred to Greatlands | |||||||||||||||||||
database managers. | |||||||||||||||||||
· | All samples are analysed | ||||||||||||||||||
in the field using a pXRF | |||||||||||||||||||
(Olympus Vanta handheld | |||||||||||||||||||
- model VMR) for the | |||||||||||||||||||
purpose | of | geochemical | |||||||||||||||||
interpretation. | |||||||||||||||||||
· All core is analysed in the | |||||||||||||||||||
field | using | a | Minalyze | ||||||||||||||||
unit. This collects ultra- | |||||||||||||||||||
high | resolution | ||||||||||||||||||
photography, | and | ||||||||||||||||||
continuous | XRF | ||||||||||||||||||
measurements. | |||||||||||||||||||
Sub- | • | If core, whether cut or sawn | · | All sampled core was cut | |||||||||||||||
sampling | |||||||||||||||||||
techniques | and whether quarter, half or | with a core saw in a | |||||||||||||||||
and sample | all core taken. | consistent | way | that | |||||||||||||||
preparation | • | If non-core, whether riffled, | preserved the bottom of | ||||||||||||||||
tube sampled, rotary split, | hole | reference | line, | ||||||||||||||||
etc and whether sampled | where | present. | |||||||||||||||||
wet or dry. | Sampling | interval | is | ||||||||||||||||
• For all sample types, the | generally | 1m | or 0.5m, | ||||||||||||||||
but | respects | geological | |||||||||||||||||
nature, quality and | |||||||||||||||||||
appropriateness of the | contacts in places. | ||||||||||||||||||
sample preparation | · | Sample | preparation | ||||||||||||||||
• | technique. | ||||||||||||||||||
Quality control procedures | included | drying, | |||||||||||||||||
adopted for all sub-sampling | crushing and pulverising | ||||||||||||||||||
stages to maximise | in full to a nominal 85% | ||||||||||||||||||
representivity of samples. | passing 75 microns. | ||||||||||||||||||
• Measures taken to ensure | |||||||||||||||||||
All staff were adequately | |||||||||||||||||||
that the sampling is | · | ||||||||||||||||||
representative of the in situ | trained | for all | sampling | ||||||||||||||||
material collected, including | steps, | with | geologists | ||||||||||||||||
for instance results for field | |||||||||||||||||||
duplicate/second-half | checking sample sheets | ||||||||||||||||||
• | sampling. | prior to loading into the | |||||||||||||||||
Whether sample sizes are | database. | ||||||||||||||||||
appropriate to the grain size | · | The sample sizes are | |||||||||||||||||
of the material being | |||||||||||||||||||
considered | appropriate | ||||||||||||||||||
sampled. | for | the | style | of | |||||||||||||||
mineralisation | in | the | |||||||||||||||||
encountered | |||||||||||||||||||
region. | |||||||||||||||||||
· | No field duplicates have | ||||||||||||||||||
been collected/reported. | |||||||||||||||||||
Quality of | • | The nature, | quality | and | · | All samples | were | ||||||||||||
assay data | appropriateness | of | the | ||||||||||||||||
and | assaying | and | laboratory | submitted for preparation | |||||||||||||||
laboratory | procedures | used | and | at | Intertek | laboratory | |||||||||||||
tests | whether | the | technique | is | Adelaide. | Pulp | samples | ||||||||||||
• | considered partial or total. | were then | submitted | for | |||||||||||||||
For | geophysical | tools, | |||||||||||||||||
analysis to Intertek Perth | |||||||||||||||||||
spectrometers, | handheld | Laboratory. | |||||||||||||||||
XRF | instruments, | etc, | the | ||||||||||||||||
parameters | used | in | · | Au analysis - 50g Fire | |||||||||||||||
determining | the | analysis | |||||||||||||||||
including | instrument | make | Assay/ICP-OES | (detection | |||||||||||||||
and | model, | reading | times, | limit of 0.005ppm). | |||||||||||||||
calibrations factors applied | |||||||||||||||||||
• | and their derivation, etc. | · | Multi-Element analysis - | ||||||||||||||||
Nature of quality control | four acid digestion ICP- | ||||||||||||||||||
procedures | adopted | (eg | MS (for Ag, Al, As, Ba, Be, | ||||||||||||||||
standards, | blanks, | Bi, Ca, Cd, Ce, Co, Cr, Cs, | |||||||||||||||||
duplicates, | external | Cu, Fe, Ga, Ge, Hf, In, K, | |||||||||||||||||
La, | Li, | Mg, | Mn, | Mo, | Na, | ||||||||||||||
Page 5 of 9
laboratory | checks) | and | Nb, Ni, P, Pb, Rb, Re, S, | |||||||||||||||
whether acceptable levels of | Sb, Sc, Se, Sn, Sr, Ta, Te, | |||||||||||||||||
accuracy | (ie | lack | of | bias) | Th, Ti, TI, U, V, W, Y, Zn, | |||||||||||||
and | precision have | been | Zr). | |||||||||||||||
No | geophysical tools | |||||||||||||||||
established. | · | |||||||||||||||||
were | used | for | any | |||||||||||||||
element | concentrations | |||||||||||||||||
in this report. | ||||||||||||||||||
· | All samples are analysed | |||||||||||||||||
in the field using a pXRF | ||||||||||||||||||
(Olympus M-series) for | ||||||||||||||||||
the | purpose | of | ||||||||||||||||
geochemical | This data | |||||||||||||||||
interpretation. | ||||||||||||||||||
is for | internal | company | ||||||||||||||||
use only. | ||||||||||||||||||
· | Quality | Control | ||||||||||||||||
procedures | in | the | field | |||||||||||||||
involve | the | use | of | |||||||||||||||
certified | reference | |||||||||||||||||
material | (CRM's) | for | ||||||||||||||||
assay | standards | and | ||||||||||||||||
blanks. | Standards | and | ||||||||||||||||
blanks are inserted every | ||||||||||||||||||
20 samples. | ||||||||||||||||||
· | No field duplicates have | |||||||||||||||||
been collected/reported. | ||||||||||||||||||
Verification | • | The verification of | · | Significant intersections | ||||||||||||||
of | significant intersections by | |||||||||||||||||
sampling | either independent or | have | been | verified | by | |||||||||||||
and | alternative company | multiple | company | |||||||||||||||
assaying | personnel. | personnel. | ||||||||||||||||
• The use of twinned holes. | · | No twin holes have been | ||||||||||||||||
• | Documentation of primary | |||||||||||||||||
drilled. | ||||||||||||||||||
data, data entry procedures, | recorded | |||||||||||||||||
data verification, data | · | Logging is | ||||||||||||||||
storage (physical and | directly | into | a | laptop | ||||||||||||||
electronic) protocols. | ||||||||||||||||||
• Discuss any adjustment to | computer using 'LogChief' | |||||||||||||||||
- | geological | logging | ||||||||||||||||
assay data. | ||||||||||||||||||
software. | This | software | ||||||||||||||||
has 'look-up tables' that | ||||||||||||||||||
do not allow for invalid | ||||||||||||||||||
entries. | Additional | |||||||||||||||||
validation is then carried | ||||||||||||||||||
out | when | data | is | |||||||||||||||
transferred to Greatlands | ||||||||||||||||||
database managers. | ||||||||||||||||||
· | No adjustments have | |||||||||||||||||
been made to any assay | ||||||||||||||||||
data. | ||||||||||||||||||
· | Primary assay data is | |||||||||||||||||
stored | in | its | electronic | |||||||||||||||
form, | and | retained | in | |||||||||||||||
both | original | certificate | ||||||||||||||||
form (.pdf) | and text/.csv | |||||||||||||||||
files. | ||||||||||||||||||
Location of | • | Accuracy and quality of | Location information | |||||||||||||||
data points | surveys used to locate drill | · | Drill hole collar locations | |||||||||||||||
holes (collar and down-hole | ||||||||||||||||||
surveys), trenches, mine | were | surveyed | using | a | ||||||||||||||
workings and other locations | LEICA DGPS (RTK Survey | |||||||||||||||||
used in Mineral Resource | Method) | (accuracy of | ± | |||||||||||||||
estimation. | ||||||||||||||||||
• Specification of the grid | 5cm). | coordinates | are | in | ||||||||||||||
system used. | · | All | ||||||||||||||||
• Quality and adequacy of | GDA94 Zone55. | |||||||||||||||||
topographic control. | · | Down hole surveys were | ||||||||||||||||
conducted | every | 30m | ||||||||||||||||
using | an Axis | Champ | ||||||||||||||||
Discover survey tool. | ||||||||||||||||||
· | Topographic control of | |||||||||||||||||
drill | collars | utilises LEICA | ||||||||||||||||
DGPS | (RTK | Survey | ||||||||||||||||
Method) | (accuracy of | ± | ||||||||||||||||
5cm). | ||||||||||||||||||
Data spacing | • | Data spacing for reporting | · | Drill | planning | at | ||||||||||||
and | ||||||||||||||||||
distribution | • | of Exploration Results. | Firetower | was | designed | |||||||||||||
Whether the data spacing | to | reduce | spacing | to | ||||||||||||||
and distribution is sufficient | ~15m between sections, | |||||||||||||||||
to establish the degree of | and | drill | all | holes | in | the | ||||||||||||
geological | and | grade | same | orientation | (north) | |||||||||||||
continuity | appropriate | for | ||||||||||||||||
the | Mineral | Resource | and | for | the | collection | of | |||||||||||
Ore | Reserve estimation | systematic | geological | |||||||||||||||
procedure(s) | and | information. | Average | |||||||||||||||
• | classifications applied. | |||||||||||||||||
Whether sample | spacing | between | drill | |||||||||||||||
compositing has been | holes | on | sections | is | ||||||||||||||
~40m. | ||||||||||||||||||
applied. | ||||||||||||||||||
· | At Firetower East, drilling | |||||||||||||||||
targeted | an | IP | ||||||||||||||||
chargeability anomaly. | ||||||||||||||||||
· Historic drilling was of an | ||||||||||||||||||
ad-hoc | nature, | with | ||||||||||||||||
average | section spacing | |||||||||||||||||
(east-west) of ~30m (in | ||||||||||||||||||
the main Firetower area), | ||||||||||||||||||
although | holes | have | ||||||||||||||||
been drilled both to the | ||||||||||||||||||
north | and | south | so | |||||||||||||||
Page 6 of 9
continuity | of | geological | ||||||||
information collected has | ||||||||||
been sparse. | ||||||||||
· | The data spacing is not | |||||||||
sufficient to establish a | ||||||||||
Mineral Resource. | ||||||||||
Orientation of | • | Whether the orientation of | · | It is interpreted that the | ||||||
data in | sampling achieves unbiased | |||||||||
relation to | sampling | of | possible | local geology is sub- | ||||||
geological | structures and the extent to | vertical. | The | orientation | ||||||
structure | which this | is | known, | of | drill | holes | is | not | ||
• | considering the deposit type. | believed | to | have | ||||||
If the relationship between | ||||||||||
introduced | any | bias | in | |||||||
the drilling orientation and | sampling. | |||||||||
the orientation of key | The | orientation | of | |||||||
mineralised structures is | · | |||||||||
considered to have | mineralised | zones | is | |||||||
introduced a sampling bias, | interpreted to be steeply | |||||||||
this should be assessed and | dipping to the south. | |||||||||
reported if material. | · | There | is | presently | ||||||
insufficient information to | ||||||||||
confirm | the | true | ||||||||
thickness | of | any | ||||||||
mineralised intervals. | ||||||||||
Sample | • | The measures taken to | · | Samples were freighted | ||||||
security | ensure sample security. | |||||||||
to | the Laboratory using | |||||||||
Greatland | chain | of | ||||||||
custody protocols. | ||||||||||
· | Verification of sample | |||||||||
numbers | and | |||||||||
identification | by | is | ||||||||
conducted | on | the | ||||||||
laboratory | receipt | of | ||||||||
samples, | and | sample | ||||||||
receipt advise | issued | to | ||||||||
Greatland. | ||||||||||
· | Details | of | all | sample | ||||||
movement | are | digitally | ||||||||
recorded. | Dates, Hole ID | |||||||||
sample ranges, | and | the | ||||||||
analytical suite requested | ||||||||||
are | recorded | with | the | |||||||
dispatch | of samples | to | ||||||||
analytical services. | ||||||||||
Audits or | • | The results of any audits | · | No audits have been | ||||||
reviews | or reviews | of | sampling | |||||||
techniques and data. | completed. | |||||||||
· | No | reviews | are | |||||||
considered | required due | |||||||||
as the project is in early | ||||||||||
phase of exploration. |
Section 2 Reporting of Exploration Results
(Criteria listed in the preceding section also apply to this section.)
Criteria | Explanation | |||||||||||||
Mineral | • | Type, | reference | · | The Firetower Project | is | ||||||||
tenement | name/number, | location | ||||||||||||
and land | and ownership | including | located wholly within the | |||||||||||
tenure status | agreements | or | material | following | Exploration | |||||||||
issues | with | third parties | Licence: | |||||||||||
such | as | joint | ventures, | |||||||||||
partnerships, | overriding | · | EL26/2004 (granted) | |||||||||||
royalties, | native | title | ||||||||||||
interests, | historical sites, | · | Greatland Pty Ltd holds a | |||||||||||
wilderness or national park | 100% | interest | in | |||||||||||
and | environmental | |||||||||||||
• | settings. | EL26/2004 | ||||||||||||
The | security of | the | · | The tenements are in | ||||||||||
tenure held at the time of | 'good | standing' | with | |||||||||||
reporting | along | with | any | Minerals | Resources | |||||||||
known | impediments to | Tasmania (MRT). | ||||||||||||
obtaining | a | licence | to | · | No known impediments | |||||||||
operate in the area. | exist, | including | a | licence | ||||||||||
to operate in the area. | ||||||||||||||
Exploration | • | Acknowledgment and | · | Exploration in the region | ||||||||||
done by other | appraisal of exploration by | of the Firetower | Project | |||||||||||
parties | other parties. | has involved the following | ||||||||||||
companies: | ||||||||||||||
· | Asarco (1970's) | |||||||||||||
· | CRA (1984) | |||||||||||||
· | Noranda and Noranda | |||||||||||||
Plutonic JV (1989-1993) | ||||||||||||||
· | Sirrocco (2000) | |||||||||||||
· | Auriongold (2001-2002) | |||||||||||||
· | Greatland Pty Ltd (2004- | |||||||||||||
2011) | ||||||||||||||
· | Unity | Mining | Limited | |||||||||||
(2011-2014) | ||||||||||||||
· | Greatland Pty Ltd (2015 - | |||||||||||||
current) | ||||||||||||||
Geology | • | Deposit type, geological | · | The Firetower project lies | ||||||||||
setting and style of | in the central north of | |||||||||||||
mineralisation. | Tasmania | within | ||||||||||||
equivalents of | the | Mt |
Page 7 of 9
Read Volcanics. | |||||||||||||||||||
· | Gold mineralisation | is | |||||||||||||||||
hosted | in | volcanoclastic | |||||||||||||||||
rocks | and | manifest | as | ||||||||||||||||
sheeted | veins | (and | |||||||||||||||||
breccias) with | associated | ||||||||||||||||||
pyrite, | haematite, quartz | ||||||||||||||||||
and limonite. | |||||||||||||||||||
· | At Firetower East, gold, | ||||||||||||||||||
zinc | and | silver | |||||||||||||||||
mineralisation appears to | |||||||||||||||||||
be associated with an IP | |||||||||||||||||||
chargeability | anomaly. | ||||||||||||||||||
Zinc mineralisation occurs | |||||||||||||||||||
as | veins | and | |||||||||||||||||
disseminations. | |||||||||||||||||||
Drill hole | • | A | summary | of | all | · | A tabulation of the collar | ||||||||||||
Information | information | material | to | ||||||||||||||||
the | understanding | of | the | details | and | significant | |||||||||||||
e x p l o r a t i o n results | intersections is contained | ||||||||||||||||||
including | a | tabulation | of | in Appendix I. | |||||||||||||||
the | following | information | by | ||||||||||||||||
for all Material drill holes: | · | Reports prepared | |||||||||||||||||
• | easting and northing | Greatland | Pty Ltd | are | |||||||||||||||
of the drill hole collar | available | to | view | on: | |||||||||||||||
• | elevation or RL | www.greatlandgold.com | |||||||||||||||||
(Reduced Level - | |||||||||||||||||||
elevation above sea | |||||||||||||||||||
level in metres) of the | |||||||||||||||||||
drill hole collar | |||||||||||||||||||
• dip and azimuth of the | |||||||||||||||||||
hole | |||||||||||||||||||
• down hole length and | |||||||||||||||||||
• | interception depth | ||||||||||||||||||
• | hole length. | ||||||||||||||||||
If the exclusion of | this | ||||||||||||||||||
information is | justified | on | |||||||||||||||||
the | basis | that | the | ||||||||||||||||
information is not Material | |||||||||||||||||||
and | this | exclusion | does | ||||||||||||||||
not | detract | from | the | ||||||||||||||||
understanding | of | the | |||||||||||||||||
report, | the | Competent | |||||||||||||||||
Person | should | clearly | |||||||||||||||||
explain why this is the | |||||||||||||||||||
case. | |||||||||||||||||||
Data | • | In reporting Exploration | • | Exploration | results | are | |||||||||||||
aggregation | Results, | weighting | |||||||||||||||||
methods | averaging | techniques, | reported by length weighted | ||||||||||||||||
maximum | and/or | average. | |||||||||||||||||
minimum | (eg | grade | • | - | Significant | ||||||||||||||
truncations | cutting of | Firetower | |||||||||||||||||
high grades) and cut-off | intersections are reported as | ||||||||||||||||||
grades | are | usually | |||||||||||||||||
Material | and | should | be | minimum length of 1m - | |||||||||||||||
• | stated. | Where | aggregate | greater than or equal to | |||||||||||||||
0.2ppm Au with up to 4m of | |||||||||||||||||||
intercepts | incorporate | internal dilution and intervals | |||||||||||||||||
short | lengths | of | high | ||||||||||||||||
grade | results | and | longer | greater than or equal to | |||||||||||||||
l e n g t h s of | low | grade | 0.5ppm Au with zero metres | ||||||||||||||||
results, | the | procedure | of internal dilution. | ||||||||||||||||
used for such aggregation | |||||||||||||||||||
should be stated and some | • | Firetower East - intercepts | |||||||||||||||||
typical | examples of such | ||||||||||||||||||
aggregations | should | be | reported as minimum length | ||||||||||||||||
• | shown in detail. | of 1m, greater than or equal | |||||||||||||||||
The assumptions used for | to | 500ppm | Zn, | with | |||||||||||||||
any reporting of metal | maximum internal dilution of | ||||||||||||||||||
equivalent values should | 4m and intervals greater than | ||||||||||||||||||
be clearly stated. | or equal to 2000ppm Zn with | ||||||||||||||||||
zero meters internal dilution. | |||||||||||||||||||
Relationship | • | These relationships are | • | Down | hole lengths | are | |||||||||||||
between | |||||||||||||||||||
mineralisation | particularly important in | reported, | true | width is | not | ||||||||||||||
widths and | the reporting of Exploration | known. | |||||||||||||||||
intercept | Results. | ||||||||||||||||||
lengths | • | If the geometry of the | |||||||||||||||||
mineralisation with respect | |||||||||||||||||||
to the drill hole angle is | |||||||||||||||||||
known, its nature should | |||||||||||||||||||
be reported. | |||||||||||||||||||
• | If it is not known and | ||||||||||||||||||
only the down hole lengths | |||||||||||||||||||
are reported, there should | |||||||||||||||||||
be a clear statement to | |||||||||||||||||||
this effect (eg 'down hole | |||||||||||||||||||
length, true width not | |||||||||||||||||||
known'). | |||||||||||||||||||
Diagrams | • | Appropriate maps and | • | Appropriate diagrams are | |||||||||||||||
sections (with scales) and | available with this report. | ||||||||||||||||||
tabulations | of | intercepts | |||||||||||||||||
should be included for any | |||||||||||||||||||
significant discovery being | |||||||||||||||||||
reported | These | should | |||||||||||||||||
include, but not be limited | |||||||||||||||||||
to a plan view of drill hole | |||||||||||||||||||
collar | locations | and | |||||||||||||||||
appropriate | sectional | ||||||||||||||||||
Page 8 of 9
views. | ||||||||||||
Balanced | • | Where comprehensive | • | The company believes this | ||||||||
reporting | reporting of all Exploration | announcement is a balanced | ||||||||||
Results is not | practicable, | report, and that all material | ||||||||||
representative reporting of | information | has | been | |||||||||
both low and high grades | reported. | |||||||||||
and/or widths should | be | |||||||||||
practiced | to | avoid | ||||||||||
misleading reporting | of | |||||||||||
Exploration Results. | ||||||||||||
Other | • | Other exploration data, if | • | Previous exploration results | ||||||||
substantive | meaningful | and | material, | included in this | ||||||||
exploration | ||||||||||||
should | be | reported | announcement can be found | |||||||||
data | ||||||||||||
including | (but | n o t limited | on the company website: | |||||||||
to): | geological | www.greatlandgold.com | ||||||||||
observations; | geophysical | |||||||||||
survey | results; | |||||||||||
geochemical | survey | |||||||||||
results; bulk samples - size | ||||||||||||
and method of treatment; | ||||||||||||
metallurgical | test | results; | ||||||||||
bulk density, groundwater, | ||||||||||||
geotechnical | and | rock | ||||||||||
characteristics; | potential | |||||||||||
deleterious | or | |||||||||||
contaminating substances. | ||||||||||||
Further work | • | The nature and scale of | • | Planned | further | work includes | ||||||
planned | further | work | (eg | geological | and | geochemical | ||||||
tests for lateral extensions | ||||||||||||
or | depth | extensions | or | investigation of drill results. | ||||||||
large-scale | step-out | |||||||||||
• | drilling). | |||||||||||
Diagrams | clearly | |||||||||||
highlighting | the | areas | of | |||||||||
possible | extensions, | |||||||||||
including | the | main | ||||||||||
geological interpretations | ||||||||||||
and | future | drilling | areas, | |||||||||
provided | this | information | ||||||||||
is | not | commercially | ||||||||||
sensitive. |
This information is provided by RNS, the news service of the London Stock Exchange. RNS is approved by the Financial Conduct Authority to act as a Primary Information Provider in the United Kingdom. Terms and conditions relating to the use and distribution of this information may apply. For further information, please contact rns@lseg.comor visit www.rns.com.
END
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Page 9 of 9
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Greatland Gold plc published this content on 21 January 2020 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 21 January 2020 11:53:01 UTC