DRILLING UPDATE - NEEDLES GOLD PROJECT, USA
Further to its ASX Announcement of 26th May 2022, Astro Resources NL (ASX: ARO ) ("ARO", "Astro " or
"the Company ") reports final results from drilling completed earlier this year at the Needles Gold Project
Drill hole 4A (21ND_004A)
The Company has now received assays from the fourth and final drill hole (21ND_004A) of the 2021-2022 Needles drilling program. A total of 267 samples have been received, representing the entire drill hole sampled at 5 foot intervals [1.52m] (Figure 2). With the receipt of these assays, the full suite of assay data for the 2021-22 drilling program has now been received.
The assays returned low gold values over much of the hole, largely being below the level of detection. Modest gold values were recorded in an upper zone from 65 to 195 feet [20-60m] averaging 30ppb Au, with a highest value of 239ppb Au hosted in a sequence of
dacitic tuffs containing moderate pyrite mineralization (Figure 3).
An equally modest zone of gold values was recorded from 630 to 670 feet [192-204m] averaging 24ppb Au with a highest value of 49ppb Au in a sequence of latite to andesite tuffs containing moderate pyrite mineralization (Figure 4).
There are no base metal or other elements indicative of
mineralized zones in the assays.
The current interpretation is that hole 21ND004A has drilled
through a dacitic ash flow sequence into andesitic to dacitic
For intrusive systems below, terminating in andesites. Based on
these results and those from previously reported holes, hole
21ND004A has defined weak gold mineralization associated
Figure 1. Needles Project Location and active
with pyrite in both dacites and the underlying andesites, associated with a moderate DC/IP anomaly to the south-west of the main anomaly trend.
Figure 2. Chargeability anomaly showing actual drill-holes 1 & 2 in blue, 3 in red and 4A in cyan.
The status of the drill hole information from the completed drilling program at Needles is set out in table 1
Table 1 - Drill Hole Information - 2021 Drilling Program
Figure 3. Example of pyrite/hematite veined dacitic crystal tuff in hole 21ND_004A Box 17 from 80
to 85 feet (24.4 to 25.9m) - propylitic altered andesite and dacites with disseminated pyrite [1-2%].
Figure 4. Example of latite-andesite tuffs in hole 21ND_004A Box 82 from 665 to 674 feet (202.7 to 205.5m) - phyllic altered andesite and latites with disseminated pyrite [+2%].
The information gained from the 2021-2022 four hole drilling program at Needles will be reviewed and integrated into a final report with conclusions and recommendations for future work on the project.
The information contained in this announcement related to the Company's past exploration results is extracted from, or was set out in, the following ASX announcements which are referred to in this announcement:
This announcement has been authorised for release by the Board of Astro Resources NL.
personal For drill logging, sample selection and delivery to the certified laboratory in the USA is based on information compiled
Vince.fayad@vfassociates.com.au
The information in this report that relates to:
Exploration Results for the Needles Property other than drill logging, sample selection and delivery to the certified laboratory in the USA is based on information compiled by Richard Newport, principal partner of Richard Newport & Associates - Consultant Geoscientists. Mr Newport is a member of the Australian Institute of Geoscientists and has sufficient experience which is 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 under the 2012 Edition of the "Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves". Mr. Newport consents to the inclusion in this announcement of the matters based on his information in the form and context in which it appears.
by Elliot Crist. Mr Crist is a member of the American Institute of Professional Geologist (AIPG) and has sufficient For experience which is 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 under the 2012 Edition of the "Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves". Mr. Crist consents to the inclusion in this announcement
of the matters based on his information in the form and context in which it appears.
APPENDIX 1 - JORC Code, 2012 Edition - Table 1
Section 1 Sampling Techniques and Data
• Nature and quality of sampling (eg cut channels, random
• Core is sampled in five-foot sections with each
chips, or specific specialised industry standard
section cut to give two half-core pieces.
measurement tools appropriate to the minerals under
• One half is being totally pulverised for assay
investigation, such as down hole gamma sondes, or
and the other half retained.
handheld XRF instruments, etc). These examples should
• Gold assay are a fire-assay of 50gram charge
not be taken as limiting the broad meaning of sampling.
at Skyline Laboratory Tucson, Arizona
• Include reference to measures taken to ensure sample
representivity and the appropriate calibration of any
measurement tools or systems used.
• Aspects of the determination of mineralisation that are
Material to the Public Report.
• In cases where 'industry standard' work has been done
this would be relatively simple (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
• Drill type (eg core, reverse circulation, open-hole hammer,
• Drilling program is in Nevada USA - all lengths
rotary air blast, auger, Bangka, sonic, etc) and details (eg
reported in feet in this table
core diameter, triple or standard tube, depth of diamond
• Diamond Core triple tube
tails, face-sampling bit or other type, whether core is
• PQ to a variable depth dependent on ground
oriented and if so, by what method, etc).
conditions then HQ to TD at approximately
1650ft depending on down hole conditions.
• HQ core back end oriented with Reflex ACT
• Method of recording and assessing core and chip sample
• Drillers marks record depths and length of
each core run and core recovered.
• Measures taken to maximise sample recovery and ensure
• Drillers marks independently assessed by the
representative nature of the samples.
Company representative for QA/QC during
• Whether a relationship exists between sample recovery
and grade and whether sample bias may have occurred
• Core and core box mark-up consists of
due to preferential loss/gain of fine/coarse material.
marking an orientation reference line where
appropriate, regular 5ft intervals marked on the
core for sampling purposes core boxes
labelled with drill hole name, start and finish
• A photographic record of all core boxes made
with core marks clearly visible.
• Drilling procedures with a full drilling mud
system and appropriate drill bit system
designed to maximize drill core recovery.
• Whether core and chip samples have been geologically
• All drill core geologically logged to a level of
and geotechnically logged to a level of detail to support
detail that can support a Mineral Resource
appropriate Mineral Resource estimation, mining studies
estimation if it is warranted
• Logging is quantitative with lithological
• Whether logging is qualitative or quantitative in nature.
Core (or costean, channel, etc) photography.
• The total length and percentage of the relevant
• If core, whether cut or sawn and whether quarter, half or
• All core from drill holes 21ND_001, 21ND_002,
21ND_003 & 21ND_004A have been sawn in
• If non-core, whether riffled, tube sampled, rotary split, etc
half for sampling and assay of the full half core.
and whether sampled wet or dry.
• For all sample types, the nature, quality and
intervals along the core at 5ft intervals.
appropriateness of the sample preparation technique.
• Quality control procedures adopted for all sub-sampling
stages to maximise 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
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Astro Resources NL published this content on 25 July 2022 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 25 July 2022 04:03:00 UTC.