ASX ANNOUNCEMENT
9 December 2019
Amended Announcement on RC Drilling Underway at Big
Rush Gold Project in North Queensland
Great Northern Minerals Limited ("Great Northern Minerals" or the "Company") (ASX:GNM) wishes to retract the announcement released on 5 December 2019 titled "RC Drilling Underway at Big Rush Gold Project in QLD".
The announcement included non-JORC Code compliant information and the Company wishes to retract this announcement. Accordingly, the announcement should be disregarded and the investors are not to rely on the information contained in the retracted announcement when making investment decisions.
A replacement version of the announcement is attached.
For more information please contact: | |
Managing Director | Investor Relations |
Cameron McLean | Peter Taylor, NWR Communications |
info@greatnorthernminerals.com.au | +61 412 036 231 |
Great Northern Minerals Limited | T: +618 6214 | 0148 |
ABN 22 000 002 111 | Level 1, 33 Colin Street | |
www.greatnorthernminerals.com.au | West Perth, WA | 6005 |
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Highlights:
- RC drilling program now underway at the Big Rush Gold Project, the largest historic gold producer of the Company's three gold mines;
- Big Rush drilling program designed to validate historic drilling information;
- Golden Cup drill program complete with results expected over the coming weeks.
Big Rush
RC drilling is now underway at the Big Rush Gold Project, located on 3 granted Mining Leases, 200km West of Townsville (Photo 1 & Figure 2). The program of approximately 1,000m is designed to confirm historic drilling and allow the estimation of a JORC-compliant gold resource at Big Rush. The planned drilling program is confined to the Central Pit area at Big Rush. The Central Pit area represents a small part of the Big Rush mineralised system which extends for a kilometre both north and south of the Central Pit (Figure 1). The drilling of these extensions represents a strong exploration target which the Company will look to test in the next program.
Photo 1: Drilling underway at the Company's Big Rush Gold Project
Great Northern Minerals Limited | T: +618 6214 | 0148 |
ABN 22 000 002 111 | Level 1, 33 Colin Street | |
www.greatnorthernminerals.com.au | West Perth, WA | 6005 |
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Figure 1: Location of historically mined pits, heap leach pad, mining lease boundaries and new EPM
application at Big Rush Gold Mine.
Golden Cup
An RC drilling program at the Golden Cup Gold Project has now been completed with a total of 8 holes drilled for 639 metres (Table 1). Drilling was undertaken by contractor Eagle Drilling NQ Pty Ltd of Charters Towers. The entire length of each drill hole has been sampled, either as 1m or composited samples, and these 302 samples are at Intertek Ltd's assay laboratory in Townsville with assay results expected over the coming weeks.
Great Northern Minerals Limited | T: +618 6214 | 0148 |
ABN 22 000 002 111 | Level 1, 33 Colin Street | |
www.greatnorthernminerals.com.au | West Perth, WA | 6005 |
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Figure 2: | Location of the Company's project in Northern Queensland | ||||||
Table 1: | Drilling Completed at the Golden Cup Gold Project | ||||||
Hole ID | Easting | Northing | Map Grid | Dip | Azimuth | EOH | Local Grid |
GCRC074 | 358856 | 7908949 | GDA94 Zone 55 | -60 | 315 | 64 | 1290mN |
GCRC075 | 358958 | 7909086 | GDA94 Zone 55 | -55 | 315 | 71 | 1450mN |
GCRC076 | 359095 | 7909218 | GDA94 Zone 55 | -50 | 315 | 83 | 1640mN |
GCRC077 | 359127 | 7909272 | GDA94 Zone 55 | -50 | 315 | 65 | 1700mN |
GCRC078 | 359029 | 7909663 | GDA94 Zone 55 | -60 | 315 | 65 | 1860mN |
GCRC079 | 359063 | 7909627 | GDA94 Zone 55 | -60 | 315 | 101 | 1860mN |
GCRC080 | 359067 | 7909642 | GDA94 Zone 55 | -60 | 315 | 89 | 1880mN |
GCRC081 | 359090 | 7909653 | GDA94 Zone 55 | -60 | 315 | 101 | 1900mN |
About Great Northern Minerals Limited
Great Northern Minerals Limited is an ASX-listed gold focussed explorer. The Company's projects include the Golden Cup, Camel Creek and Big Rush Gold Mines in Queensland.
***ENDS***
Competent Persons Statement
The information in this report that relates to Exploration Results is based on information compiled under the supervision of Andrew Jones, an employee of Great Northern Minerals Limited. Mr Jones is a member of the Australasian Institute of Mining and Metallurgy and has sufficient experience of relevance to the styles of mineralisation and type of deposit under consideration and to the activity which he is undertaking to qualify as a Competent Person as defined in the 2012 Edition of the "Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves." Mr Jones consents to the inclusion in this report of the matters based on his information in the form and context in which they appear.
Great Northern Minerals Limited | T: +618 6214 | 0148 |
ABN 22 000 002 111 | Level 1, 33 Colin Street | |
www.greatnorthernminerals.com.au | West Perth, WA | 6005 |
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Section 1 JORC Code, 2012 Edition - Sampling Techniques and Data
Criteria | JORC Code explanation | Commentary | ||||
Sampling | ∙ Nature and quality of sampling (eg cut | ∙ Drilling reported is angled Reverse Circulation | ||||
techniques | channels, random chips, or specific | (RC) drilling. | ||||
specialised industry standard | ∙ Sampling consists of one metre split samples | |||||
measurement tools appropriate to the | and composited samples. | |||||
minerals under investigation, such as | ∙ Assay results are yet to be received. | |||||
down hole gamma sondes, or handheld | ∙ Sample weights were approximately 3kg of | |||||
XRF instruments, etc). These examples | material. The full sample was pulverised. Fire | |||||
should not be taken as limiting the broad | Assaying was completed using a 50 g charge. | |||||
meaning of sampling. | Multi-element assaying was done using ICP | |||||
∙ Include reference to measures taken to | following a four acid digest. | |||||
ensure sample representivity and the | ||||||
appropriate calibration of any | ||||||
measurement tools or systems used. | ||||||
∙ Aspects of the determination of | ||||||
mineralisation that are Material to the | ||||||
Public Report. | ||||||
∙ In cases where 'industry standard' work | ||||||
has been done this would be relatively | ||||||
simple (eg '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. | ||||||
Unusual commodities or mineralisation | ||||||
types (eg submarine nodules) may | ||||||
warrant disclosure of detailed | ||||||
information. | ||||||
Drilling | ∙ Drill type (eg core, reverse circulation, | ∙ All current drilling at Golden Cup and Big | ||||
techniques | open-hole hammer, rotary air blast, | Rush is angled Reverse Circulation drilling. | ||||
auger, Bangka, sonic, etc) and details | ||||||
(eg core diameter, triple or standard | ||||||
tube, depth of diamond tails, face- | ||||||
sampling bit or other type, whether core | ||||||
is oriented and if so, by what method, | ||||||
etc). | ||||||
Drill sample | ∙ Method of recording and assessing core | ∙ Sample recoveries assessed visually. | ||||
recovery | and chip sample recoveries and results | ∙ No measures taken. | ||||
assessed. | ∙ Unknown as assays not received. | |||||
∙ Measures taken to maximise sample | ||||||
recovery and ensure representative | ||||||
nature of the samples. | ||||||
∙ Whether a relationship exists between | ||||||
sample recovery and grade and whether | ||||||
sample bias may have occurred due to | ||||||
preferential loss/gain of fine/coarse | ||||||
material. | ||||||
Logging | ∙ Whether core and chip samples have | ∙ Geological logging of colour, weathering, | ||||
been geologically and geotechnically | lithology, alteration and mineralisation has | |||||
logged to a level of detail to support | been undertaken. | |||||
appropriate Mineral Resource estimation, | ∙ RC is considered both qualitative and | |||||
mining studies and metallurgical studies. | quantitative in nature. | |||||
∙ Whether logging is qualitative or | ∙ The total length of the RC holes were logged. | |||||
quantitative in nature. Core (or costean, | ||||||
channel, etc) photography. | ||||||
∙ The total length and percentage of the | ||||||
relevant intersections logged. | ||||||
Great Northern Minerals Limited | T: +618 6214 0148 | |||||
ABN 22 000 002 111 | Level 1, 33 Colin Street | |||||
www.greatnorthernminerals.com.au | West Perth, WA 6005 |
Criteria | JORC Code explanation | Commentary | |||||||
Sub- | ∙ If core, whether cut or sawn and whether | ∙ Drilling was RC not core drilling. | |||||||
sampling | quarter, half or all core taken. | ∙ 1m samples were collected straight from the | |||||||
techniques | ∙ If non-core, whether riffled, tube | drill rig cyclone and splitter. Composited | |||||||
and sample | sampled, rotary split, etc and whether | samples were collected with PVC tube. | |||||||
preparation | sampled wet or dry. | ∙ Sampling is considered representative. | |||||||
∙ For all sample types, the nature, quality | ∙ Internal laboratory standards used. | ||||||||
and appropriateness of the sample | ∙ No duplicates taken at this stage. | ||||||||
preparation technique. | ∙ 3kg sample size considered appropriate for | ||||||||
∙ Quality control procedures adopted for all | the grain size of the sedimentary rock units | ||||||||
sub-sampling stages to maximise | sampled. | ||||||||
representivity of samples. | |||||||||
∙ Measures taken to ensure that the | |||||||||
sampling is representative of the in situ | |||||||||
material collected, including for instance | |||||||||
results for field duplicate/second-half | |||||||||
sampling. | |||||||||
∙ Whether sample sizes are appropriate to | |||||||||
the grain size of the material being | |||||||||
sampled. | |||||||||
Quality of | ∙ The nature, quality and appropriateness | ∙ The assaying work was Fire Assay (50g) | |||||||
assay data | of the assaying and laboratory | which is industry standard assay technique | |||||||
and | procedures used and whether the | for gold mineralisation and ICP for multi- | |||||||
laboratory | technique is considered partial or total. | elements with a four acid digest. Both | |||||||
tests | ∙ For geophysical tools, spectrometers, | ∙ | considered total techniques. | ||||||
handheld XRF instruments, etc, the | No instruments reported. | ||||||||
parameters used in determining the | ∙ | Laboratory standards utilised. | |||||||
analysis including instrument make and | |||||||||
model, reading times, calibrations factors | |||||||||
applied and their derivation, etc. | |||||||||
∙ Nature of quality control procedures | |||||||||
adopted (eg standards, blanks, | |||||||||
duplicates, external laboratory checks) | |||||||||
and whether acceptable levels of | |||||||||
accuracy (ie lack of bias) and precision | |||||||||
have been established. | |||||||||
Verification | ∙ The verification of significant | ∙ Assay results not received. | |||||||
of sampling | intersections by either independent or | ∙ Some of these holes twinned historic drill | |||||||
and | alternative company personnel. | holes. | |||||||
assaying | ∙ The use of twinned holes. | ∙ Data was collected on paper and entered into | |||||||
∙ Documentation of primary data, data | an Excel Worksheet. | ||||||||
entry procedures, data verification, data | ∙ Assay results not received. | ||||||||
storage (physical and electronic) | |||||||||
protocols. | |||||||||
∙ Discuss any adjustment to assay data. | |||||||||
Location of | ∙ Accuracy and quality of surveys used to | ∙ Coordinates located by hand held Garmin | |||||||
data points | locate drill holes (collar and down-hole | GPS. | |||||||
surveys), trenches, mine workings and | ∙ Co-ordinates are recorded in GDA94 zone | ||||||||
other locations used in Mineral Resource | 55. | ||||||||
estimation. | ∙ Control considered to be good. | ||||||||
∙ Specification of the grid system used. | |||||||||
∙ Quality and adequacy of topographic | |||||||||
control. | |||||||||
Data | ∙ Data spacing for reporting of Exploration | • As this drilling program was a reconnaissance | |||||||
spacing and | Results. | drilling program there was considerable variation | |||||||
distribution | ∙ Whether the data spacing and | ||||||||
in the drill spacings. | |||||||||
distribution is sufficient to establish the | |||||||||
• Only 8 holes drilled over a 1km strike length. | |||||||||
degree of geological and grade continuity | |||||||||
• One metre samples and composited samples | |||||||||
appropriate for the Mineral Resource and | |||||||||
were taken. Assay results not received. | |||||||||
Ore Reserve estimation procedure(s) | |||||||||
and classifications applied. | |||||||||
∙ Whether sample compositing has been | |||||||||
Great Northern Minerals Limited | T: +618 6214 0148 | ||||||||
ABN 22 000 002 111 | Level 1, 33 Colin Street | ||||||||
www.greatnorthernminerals.com.au | West Perth, WA 6005 |
Criteria | JORC Code explanation | Commentary | ||||||
applied. | ||||||||
Orientation | ∙ Whether the orientation of sampling | ∙ The attitude of the lithological units is | ||||||
of data in | achieves unbiased sampling of possible | predominantly believed to be NE striking and | ||||||
relation to | structures and the extent to which this is | dipping at a moderate angle towards the | ||||||
geological | known, considering the deposit type. | southeast. Drilling was generally | ||||||
structure | ∙ If the relationship between the drilling | perpendicular to the considered lithology | ||||||
orientation and the orientation of key | orientation with holes drilled at azimuths of | |||||||
mineralised structures is considered to | 315 degrees at dip angles between -50 to -60 | |||||||
have introduced a sampling bias, this | degrees. Due to locally varying intersection | |||||||
should be assessed and reported if | angles between drillholes and lithological | |||||||
material. | units all results will be defined as downhole | |||||||
widths. | ||||||||
∙ No drilling orientation and sampling bias has | ||||||||
been recognised at this time and it is not | ||||||||
considered to have introduced a sampling | ||||||||
bias. | ||||||||
Sample | ∙ The measures taken to ensure sample | ∙ Samples taken by qualified staff and | ||||||
security | security. | delivered to assay laboratory by company | ||||||
representatives. | ||||||||
Audits or | ∙ The results of any audits or reviews of | ∙ No audits or reviews completed. | ||||||
reviews | sampling techniques and data. | |||||||
Section 2 JORC Code, 2012 Edition - Reporting of Exploration Results
Criteria | JORC Code explanation | Commentary | |||||||||
Mineral | ∙ | Type, reference name/number, location and | ∙ | Mining Lease ML 4536 is held by Golden Ant | |||||||
tenement | ownership including agreements or material | Mining Pty Ltd. | |||||||||
and land | issues with third parties such as joint | ∙ | Great Northern Minerals Limited has | ||||||||
tenure | ventures, partnerships, overriding royalties, | exercised an option agreement to purchase | |||||||||
status | native title interests, historical sites, | up to 100% of the Mining Lease listed above | |||||||||
wilderness | or | national | park | and | from Q-Generate Pty Ltd the owner of Golden | ||||||
∙ | environmental settings. | Ant Mining Pty Ltd. | |||||||||
The security of the tenure held at the time of | ∙ | The Mining Lease is granted. | |||||||||
reporting along with any known impediments | |||||||||||
to obtaining a licence to operate in the area. | |||||||||||
Exploration | ∙ | Acknowledgment | and | appraisal | of | ∙ | The Golden Cup Gold Mine has been the | ||||
by other | exploration by other parties. | subject of substantial previous exploration, | |||||||||
parties | resource definition drilling and mining | ||||||||||
operations. | |||||||||||
∙ Gold mineralization in the Golden Cup area | |||||||||||
was first recognized in 1987. | |||||||||||
∙ | Previous exploration and mining activities | ||||||||||
have been undertaken by Golden Ant Mining | |||||||||||
Pty Ltd, Lynch Mining, Werrie Gold, Wiluna | |||||||||||
Gold Mines Limited and Curtain Bros Pty Ltd. | |||||||||||
Geology | ∙ | Deposit type, geological setting and style of | ∙ | The Golden Cup Gold Mine is located in the | |||||||
mineralisation. | Kangaroo Hills Mineral Field. | ||||||||||
∙ Quartz vein hosted gold mineralization within | |||||||||||
sedimentary rock units occurs within the | |||||||||||
project area and has been mined previously. | |||||||||||
Great Northern Minerals Limited | T: +618 6214 | 0148 |
ABN 22 000 002 111 | Level 1, 33 Colin Street | |
www.greatnorthernminerals.com.au | West Perth, WA | 6005 |
Criteria | JORC Code explanation | Commentary |
Drill hole Information
∙ A summary of all information material to the | ∙ Refer to Table 1 of this ASX Announcement |
understanding of the exploration results | which provides easting and northing of the |
including a tabulation of the following | drill collars, dip, azimuth and end of hole |
information for all Material drill holes: | depths. |
- easting and northing of the drill hole collar
o elevation or RL (Reduced Level - elevation above sea level in metres) of the drill hole collar
- dip and azimuth of the hole
o down hole length and interception depth o 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 aggregation methods
-
In reporting Exploration Results,
weighting averaging techniques, maximum and/or minimum grade truncations (eg cutting of high grades) and cut-off grades are usually Material and should be stated. - Where aggregate intercepts incorporate short lengths of high grade results and longer lengths of low grade results, the procedure used for such aggregation should be stated and some typical examples of such aggregations should be shown in detail.
- The assumptions used for any reporting of metal equivalent values should be clearly stated.
- No assays reported.
- No high cuts have been applied.
- Metal equivalent values are not being reported.
Relationship | ∙ These relationships are particularly important | ∙ No assays received. |
between | in the reporting of Exploration Results. | ∙ Due to locally varying intersection |
mineralisation | ∙ If the geometry of the mineralisation with | angles between drill holes and |
widths and | respect to the drill hole angle is known, its | lithological units all results will be |
intercept | nature should be reported. | defined as downhole widths. |
lengths | ∙ 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 sections (with scales) | ∙ The drill holes referenced were drilled |
and tabulations of intercepts should be | in the vicinity of Pits 1, 2 & 3. Figures | |
included for any significant discovery being | will be in follow-up diagrams when | |
reported These should include, but not be | assays received. | |
limited to a plan view of drill hole collar | ||
locations and appropriate sectional views. |
Balanced ∙ Where comprehensive reporting of all
reportingExploration Results is not practicable, representative reporting of both low and high grades and/or widths should be practiced to avoid misleading reporting of Exploration Results.
- The accompanying document is considered to represent a balanced report.
Great Northern Minerals Limited | T: +618 6214 | 0148 |
ABN 22 000 002 111 | Level 1, 33 Colin Street | |
www.greatnorthernminerals.com.au | West Perth, WA | 6005 |
Criteria | JORC Code explanation | Commentary | ||||||||||
Other | ∙ | Other exploration data, if meaningful and | ∙ Assay results are awaited for this | |||||||||
substantive | material, should be reported including (but | drilling program. | ||||||||||
exploration | not limited to): geological observations; | |||||||||||
data | 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 | ∙ Future work will most likely involve | |||||||||
(eg tests for lateral extensions or depth | follow-up drilling. | |||||||||||
∙ | extensions or large-scalestep-out drilling). | ∙ Diagrams will be included in follow-up | ||||||||||
Diagrams | clearly highlighting | the areas of | ASX Announcement. |
possible extensions, including the main geological interpretations and future drilling areas, provided this information is not commercially sensitive.
Great Northern Minerals Limited | T: +618 6214 | 0148 |
ABN 22 000 002 111 | Level 1, 33 Colin Street | |
www.greatnorthernminerals.com.au | West Perth, WA | 6005 |
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Wollongong Coal Limited published this content on 09 December 2019 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 09 December 2019 00:10:02 UTC