ASX RELEASE-29 November 2019
Maiden Drilling Program Intersects
Gold at Hang Glider Hill
- An early stage three-hole diamond drilling program completed at the Hang Glider Hill gold prospect has intersected visible gold in the first hole 19HGDD001
- Significant shallow gold intersections in hole 19HGDD001 include:
- 6.8m @ 1.86g/t Au from 53.7m incl. 1.05m @ 7.42g/t Au
- 7.68m @ 0.66g/t Au from 44m
- The gold mineralisation is hosted by quartz-carbonate veins that cross cut a highly deformed, flat dipping, north-westerly trending package of highly altered rocks interpreted to be proximal to the Mount Monger Fault
- The Mt Monger Fault is a regional scale fault that appears to be a major influence on gold mineralisation at Hang Glider Hill and Lucky Strike, 17km to the south east
- The Hang Glider Hill prospect was initially recognised by the discovery of gold nuggets over a 2000m long north-westerly trend in 2018 and is supported by gold anomalies in auger surface sample results
- This new gold discovery complements the growing gold prospect portfolio at the Lefroy Gold Project, which now includes Lucky Strike, Zanex, Havelock and Red Dale
Figure 1 Gold grain in drill core interval 47.08m to 47.36m from 19HGDD001 (red circle diameter 1cm)
ASX Code: LEX | Australian Registered Office | E: info@lefroyex.com |
T: +61 8 9321 0984 | ||
Shares on Issue: 100.5M | Level 2, 11 Ventnor Avenue | |
ARBN: 052 123 930 | ||
Market Capitalisation: $19.5m | West Perth, 6005 | |
www.lefroyex.com |
ASX Announcement
29 November 2019
Lefroy Exploration Limited (ASX: LEX) ("Lefroy" or "the Company") is pleased to announce results from a recently completed diamond drilling (DD) program at the Hang Glider Hill ("Hang Glider" or "HGH") prospect, located within the Lefroy Gold Project. The three angled holes were designed to evaluate the geology beneath the topographical feature known as Hang Glider Hill and constitute the maiden drilling by Lefroy at this developing gold prospect.
Hang Glider is located approximately 8km south west of the high-grade Daisy Milano underground mine operated by Silver Lake Resources (ASX: SLR), and central to three operating gold plants at Jubilee, St Ives and Randalls. Each of these plants is within 35km of HGH.
The Hang Glider Hill prospect is located close to the interpreted position of the regional scale Mt Monger Fault, along which (some 17km along strike to the south east) the Company continues to enhance the high-grade Lucky Strike prospect (Figure 2). HGH was recognised by the Company in early 2018 following the discovery of numerous gold nuggets (LEX:ASX 26 June 2018) and the definition of a north-westerly gold trend subsequently defined by surface sampling extending 2.3km from the original HGH nugget find.
Figure 2 Lefroy Gold Project showing Eastern and Western Lefroy sub projects and the location of Hang Glider Hill relative to Lucky Strike prospect, Daisy Milano and St Ives. Refer to Figure 3 for inset map.
ASX Announcement
29 November 2019
Drill Program
The primary focus of the diamond drill program was to provide information for a geological model to allow planning of future diamond, RC and aircore drilling. The prominent topographic feature, known as Hang Glider Hill, consists of a shallowly south dipping, strongly deformed sequence of interpreted metasediment, intermediate volcanics and ultramafics that is intruded by feldspar porphyry. This sequence is cross cut by later upright northerly trending quartz-carbonate veins. Gold nuggets have been found in close proximity to the Hill, and also up to 2km along strike (refer LEX:ASX release 27 September 2018), and are interpreted to be derived from a primary source.
Figure 3 Interpreted geological map of the Hang Glider Hill area and extent of LEX tenement package. Refer to Figure 4 for drilling inset map.
Three angled diamond holes were drilled on three drill sections spaced 80m apart. They were sited at the base of the south side of the hill (Figure 4) and evaluated 160m of strike. The first hole, 19HGDD001, was drilled to a depth of 258.6m. The rock sequence intersected guided the depths in the subsequent holes drilled on sections 80m either side. Diamond core drilling was commenced from surface for each hole to ensure collection of core through the shallow oxide (saprolite) zone (refer Figure 4).
Each of the holes intersected a similar geological sequence comprising a shallow oxide zone, and a strongly deformed or sheared zone. These are in contact with a lower, relatively undeformed sequence of biotite altered intermediate volcanic and sedimentary rocks, that includes black shale.
ASX Announcement
29 November 2019
The sheared zone comprises a highly deformed and altered mixed rock sequence that includes interpreted intermediate volcanic rocks, talc-altered ultramafic and feldspar porphyry over a downhole width of approximately 40m. This south flat dipping sheared sequence has a relatively sharp contact with the underlying relatively undeformed intermediate volcanic package and is interpreted to represent a thrust.
The shear zone is also characterised by later stage cross cutting, near vertical quartz veins (Figure 5). Visible gold (VG) was found in one of these quartz veins in hole 19HGDD001 (Figure 1).
The results from this early stage diamond drilling (Table 1) have confirmed gold mineralisation within the sheared and quartz veined rock package in hole 19HGDD001. The diamond holes 80m along strike either side of 19HGDD001 intersected a similar geological sequence but were not significantly mineralised.
Significant results returned from 19HGDD001 (Table 1) include: -
- 6.8m @ 1.86g/t Au from 53.7m
- 7.68m @ 0.66g/t Au from 44m (includes VG)
Figure 4 Left Image drill hole and tenement plan. Recent diamond holes annotated and historical (1993) drilling depicted as circles. Right Image Drill section for hole 19HGDD001.
ASX Announcement
29 November 2019
Figure 5 Drill core from 54.07m to 58.80m in 19HGDD001 highlighting mineralised cross cutting quartz veins and grade intervals.
Discussion and Next Steps
The results from the three diamond drill holes have for the first time provided important geological and structural information at Hang Glider Hill that will assist in refining the geological model. In addition, the drilling has discovered a new geological setting that is gold mineralised.
The three diamond holes provide key geological information of the rock package in fresh rock (primary zone) and reinforce the gold prospectivity of the area. This information can now be placed in context with a number of other geological indicators that the Company has been acquiring and building upon since early 2018. In particular, these include the distribution and coincidence of gold nuggets with a gold anomaly defined from auger sampling over a 2km strike length north west from HGH.
The developing geological model and, in particular, the shear zone with cross-cutting gold mineralised quartz veins, provides the Company with a distinctive target horizon and opportunity to focus further exploration that will include drilling. The Company holds approximately 4km of the interpreted structure extending north west from HGH under granted title. A key target area for future drilling is at the north western nugget patch (refer Figure 6) where weathered rock outcrops display similar characteristics to that observed at HGH.
Planning of the next stage of drilling activity is underway. This will include auger drilling to both infill the existing grid, but also to extend to the north west into tenure (Figure 3) only granted this year. The auger drilling is expected to commence in the March quarter of 2020.
The Company has commenced a detailed geological mapping program focused along the trend. This work will incorporate assessment and inclusion of mapping conducted by previous exploration companies that were focused on nickel, including WMC and BHP during the 1970's and 1980's.
Integration of the results from the geological mapping, the auger drilling and incorporating knowledge from the recent diamond drilling will guide a focused drilling program along the 4km trend that will include a combination of air core, reverse circulation and diamond drilling.
ASX Announcement
29 November 2019
Background-Hang Glider Hill
HGH is located in the north west region of the Company's Lefroy Gold Project ("LGP" or "Project"), approximately 50km to the south east of Kalgoorlie. It is part of the Eastern Lefroy package of tenements which covers 226km2. Tenements are wholly owned by LEX and not subject to any farm-in agreements.
The LGP is referenced in two packages i.e.
- Eastern Lefroy covering 226km2 of wholly owned tenements including Lucky Strike, Red Dale, Havelock, Hang Glider, Neon and other sub-projects along or adjacent to the regional Mt Monger fault; and
- Western Lefroy JV tenements covering 372km2 adjoining the St Ives gold camp that are subject to a Farmin and Joint Venture agreement with Gold Fields Limited ("Gold Fields").
The Eastern Lefroy tenements are proximate to the regional Mt Monger Fault (Figure 2), which is considered to be structurally analogous to other major regional faults in the Kalgoorlie terrain (e.g. Boulder Lefroy Fault). The Company considers areas around the Mt Monger Fault to be prospective for large gold deposits and hence these areas are a major focus for exploration by the Company.
HGH has been the focus of reconnaissance stage exploration since early 2018 following the discovery of numerous gold nuggets (LEX:ASX 26 June 2018) and preliminary definition of a north-westerly trend extending 2.3km from the original HGH nugget find. The Company considers the gold nuggets (Figure 6) to be a surface geochemical anomaly.
In September 2018 the Company completed an early stage auger drilling program as an initial exploration search tool along the trend. A total of 266 samples were collected at 50m centres along 200m spaced east west lines that effectively cover approximately 2000m of strike.
The results of the sampling (ASX: LEX 6 November 2018) defined northern and southern zones of gold anomalism (plus 20ppb Au) around the interpreted position of the Mt Monger Fault. The zones are coincident with the locations of the discovered gold nuggets. The northern anomaly consists of three subparallel trends with a strike of up to 880m. The southern anomaly is centered about Hang Glider hill (a linear topographical feature) and is a coherent anomaly over a 680m strike length. The anomaly has four sample points exceeding 50ppb Au, with a peak of 82ppb.
The HGH trend is consistent with a north west trending sub-cropping sequence of deformed ultramafic, chert and metasediments that dip to the south west at approximately 50 degrees. The sequence is cross cut by quartz veins and intruded in isolated locations by feldspar porphyry.
Figure 6 Selection of gold nuggets found at Hang Glider Hill (source LEX: ASX release 27 September 2018)
ASX Announcement
29 November 2019
About Lefroy Exploration Limited and the Lefroy Gold Project
Lefroy Exploration Limited is a WA based and focused explorer taking a disciplined methodical and conceptual approach in the search for high value gold deposits in the Yilgarn Block of Western Australia. Key projects include the Lefroy Gold Project to the south east of Kalgoorlie and the Lake Johnston Project 120km to the west of Norseman.
The 100% owned Lefroy Gold Project contains mainly granted tenure and covers 598km2 in the heart of the world class gold production area between Kalgoorlie and Norseman. The Project is in close proximity to Gold Fields' St Ives gold camp, which contains the Invincible gold mine located in Lake Lefroy and is also immediately south of Silver Lake Resources' (ASX:SLR) Daisy Milano gold mining operation. The Project is divided into the Western Lefroy package, subject to a Farm-In Agreement with Gold Fields and the Eastern Lefroy package (100% Lefroy owned). The Farm-In Agreement with Gold Fields over the Western Lefroy tenement package commenced on 7 June 2018. Gold Fields can earn up to a 70% interest in the package by spending up to a total of $25million on exploration activities within 6 years of the commencement date.
Location of the Lefroy Gold Project relative to Kalgoorlie and the Western Lefroy tenement package subject to the Gold Fields joint venture.
For Further Information please contact:
Wade Johnson
Managing Director
Telephone: +61 8 93210984
Email:wjohnson@lefroyex.com
ASX Announcement
29 November 2019
Table 1: 2019 Diamond Drilling-Eastern Lefroy Gold Project-Hang Glider Hill Prospect
Diamond drill hole intersections tabulated below are calculated with a 0.25g/t Au lower cut for the entire drill program. The intercepts represent the intersections from individual consecutive core sample results that vary in length between 0.2m to 1.2m, but nominally 1m and include a maximum of 2m of internal dilution.
Collar E | Collar N | Depth | Dip | Azimuth | Depth | Depth To | Downhole | Au Value | ||
Hole ID | Collar RL | Intersectio | ||||||||
(MGA) | (MGA) | (m) | From (m) | (m) | n (m) | (g/t) | ||||
19HGDD001 | 389357.97 | 6565063.54 | 372.12 | 258.6 | -50 | 20 | 0.00 | 0.80 | 0.80 | 0.28 |
19HGDD001 | 389357.97 | 6565063.54 | 372.12 | 258.6 | -50 | 20 | 35.00 | 36.97 | 1.97 | 0.56 |
19HGDD001 | 389357.97 | 6565063.54 | 372.12 | 258.6 | -50 | 20 | 43.99 | 51.67 | 7.68 | 0.66 |
VG @ 47.3m | ||||||||||
19HGDD001 | 389358 | 6565063.5 | 372.12 | 258.6 | -50 | 20 | 53.70 | 60.50 | 6.80 | 1.86 |
Including | 57 | 58.05 | 1.05 | 7.42 | ||||||
VG @ 60.25m | ||||||||||
19HGDD001 | 389357.97 | 6565063.54 | 372.12 | 258.6 | -50 | 20 | 64.00 | 66.00 | 2.00 | 1.02 |
19HGDD002 | 389435.77 | 6565026.50 | 372.09 | 171.7 | -50 | 25 | 69.4 | 70.07 | 0.67 | 0.41 |
19HGDD003 | 389291.13 | 6565094.13 | 371.80 | 150.7 | -55 | 20 | NSR |
*Notes Specific-ASX Announcements
The following announcements were lodged with the ASX and further details (including supporting JORC Reporting Tables) for each of the sections noted in this Announcement can be found in the following releases. Note that these announcements are not the only announcements released to the ASX by the Company but specific to Hang Glider Hill.
- Exploration Update: New Gold Prospect Identified: 26 June 2018
- Exploration Update: Drilling Commenced at Capstan: 27 July 2018
- Exploration Update: Eastern and Western Lefroy Projects: 6 August 2018
- June 2018 Quarterly Activities Report: 31 July 2018
- Exploration Progress Eastern and Western Lefroy Projects: 3 September 2018
- Auger Drilling Commenced at Hang Glider Hill: 27 September 2018
- Exploration Update Drilling Programs Completed at Eastern Lefroy: 18 October 2018
- September 2018 Quarterly Activities Report: 29 October 2018
- Surface Gold Anomaly Enhances Hang Glider Hill Trend: 6 November 2018
The information in this announcement that relates to exploration targets and exploration results is based on information compiled by Wade Johnson a competent person who is a member of the Australian Institute of Geoscientists (AIG). Wade Johnson is employed by Lefroy Exploration Limited. Wade has sufficient experience that is relevant to the style of mineralisation and type of deposits under consideration and to the activity being undertaken to qualify as a Competent Person as defined in the 2012 edition of the JORC Code. Wade Johnson consents to the inclusion in this announcement of the matters based on his work in the form and context in which it appears.
JORC CODE, 2012 Edition-Table 1 Report -Lefroy Project -Hang Glider Hill Prospect October 2019 Diamond Drilling
SECTION 1: SAMPLING TECHNIQUES AND DATA
Criteria | JORC Code Explanation | Commentary | |||
Sampling | • | Nature and quality of sampling (eg cut | • | The sampling noted in this release has been carried out | |
techniques | channels, random chips, or specific | using Diamond drilling (DD) at the Hang Glider Hill prospect. | |||
specialised industry standard measurement | The DD program comprised 3 angled holes for 581m. Holes | ||||
tools appropriate to the minerals under | varying in depth from 150.1m to 258.6m with an average | ||||
investigation, such as down hole gamma | depth of 194m. Holes 19HGDD001 and 19HGDD002 were | ||||
sondes, or handheld XRF instruments, etc). | drilled at -500 toward 0200 and 0250 azimuth with | ||||
These examples should not be taken as | 19HGDD003 drilled at -550 toward 0200 azimuth. Holes were | ||||
limiting the broad meaning of sampling. | drilled approximately 80m apart along a north-west strike. | ||||
• Include reference to measures taken to | |||||
• | Sampling and QAQC protocols as per industry best practice | ||||
ensure sample representivity and the | |||||
with further details below. | |||||
appropriate calibration of any measurement | |||||
• | DD was conducted utilising triple tube HQ sized core to | ||||
tools or systems used. | obtain the highest quality sample and to minimise core loss | ||||
• Aspects of the determination of | |||||
through the saprolite before transitioning to NQ sized core | |||||
mineralisation that are Material to the | |||||
once the ground became competent. This was left to | |||||
Public Report. In cases where 'industry | |||||
drillers' discretion. Core was collected in core trays where it | |||||
standard' work has been done this would be | |||||
was marked up and logged by the supervising geologist. It | |||||
relatively simple (eg 'reverse circulation | |||||
was noted the there was excellent core recovery and only | |||||
drilling was used to obtain 1 m samples from | |||||
minor zones | of core loss which were recorded by the | ||||
which 3 kg was pulverised to produce a 30 g | |||||
geologist. Samples were first cut in half using an Almonte | |||||
charge for fire assay'). In other cases more | |||||
core saw and collected in calico bags with a minimum | |||||
explanation may be required, such as where | |||||
there is coarse gold that has inherent | sample width of 0.2m and a maximum 1.2m to produce a 2- | ||||
sampling problems. Unusual commodities or | 4kg sample through the interpreted mineralised zone. Once | ||||
mineralisation types (eg submarine nodules) | at the lab samples were dried, crushed and prepared to | ||||
may warrant disclosure of detailed | produce a 40g charge for fire assay analysis for gold (Au) by | ||||
information. | Atomic Absorption Spectrometry (AAS). | ||||
Drilling | • | Drill type (eg core, reverse circulation, open- | • | The diamond drilling (DD) was completed by Raglan Drilling | |
techniques | hole hammer, rotary air blast, auger, | (Kalgoorlie). | HQ triple tube was used to preserve core | ||
Bangka, sonic, etc) and details (eg core | integrity and obtain accurate bottom of hole orientation | ||||
diameter, triple or standard tube, depth of | marks. Once the driller decided the ground was competent | ||||
diamond tails, face-sampling bit or other | enough, NQ sized core was used. | ||||
type, whether core is oriented and if so, by | |||||
what method, etc). | |||||
Drill sample | • | Method of recording and assessing core and | • | Diamond core was measured and compared to drilled | |
recovery | chip sample recoveries and results assessed. | interval indicated by the drillers. From this, a percentage of | |||
• Measures taken to maximise sample | recovery can be calculated. Recovery in oxide material | ||||
recovery and ensure representative nature of | varied, however where core loss occurred this has been | ||||
the samples. | diligently noted by the drill crew and geologist. | ||||
• | Whether a relationship exists between | • | The use of professional and competent core drilling | ||
sample recovery and grade and whether | contractors minimised the issues with sample recoveries. An | ||||
sample bias may have occurred due to | honest and open line of communication between the drill | ||||
preferential loss/gain of fine/coarse | crew and the geologist allowed for a comprehensive | ||||
material. | understanding of where core loss may have occurred. | ||||
• Core recovery in the oxide material was often excellent, | |||||
therefore, no significant bias is expected. | |||||
Logging | • | Whether core and chip samples have been | • | Detailed logging of, regolith, lithology, structure, veining, | |
geologically and geotechnically logged to a | alteration, mineralisation and recoveries recorded in each | ||||
level of detail to support appropriate | hole by qualified geologist. | ||||
Mineral Resource estimation, mining studies | • | Every hole was logged for the entire length. | |||
and metallurgical studies. | • | Diamond core underwent detailed logging through the | |||
• Whether logging is qualitative or | |||||
entire hole with data being transferred to the Lefroy drilling | |||||
quantitative in nature. Core (or costean, | |||||
database after capture | |||||
channel, etc) photography. | |||||
• | Analysis of rock type, colour, structure, alteration, veining | ||||
• The total length and percentage of the | |||||
and geotechnical data were all routinely collected. | |||||
relevant intersections logged. | |||||
• | Geological logging is qualitative in nature and relies on the | ||||
geologist logging the hole to make assumptions of the core | |||||
character based on their experience and knowledge. | |||||
• Recovery, RQD (rock quality designation) and magnetic | |||||
susceptibility measurements were recorded and are | |||||
considered to be quantitative in nature. | |||||
• Core within the core trays for each hole was photographed | |||||
using a purpose made camera stand and a quality digital SLR | |||||
camera and stored in the database. | |||||
• All drill holes were logged in their entirety (100%). |
Criteria | JORC Code Explanation | Commentary | |||||
Sub-sampling | • | If core, whether cut or sawn and whether | • | Half core sampling was conducted with core cut using an | |||
techniques and | quarter, half or all core taken. | Almonte core saw. | |||||
sample | • | If non-core, whether riffled, tube sampled, | • | Where a bottom of hole orientation line was drawn on the | |||
preparation | rotary split, etc and whether sampled wet or | core, this was also used as a guide to cutting the core, | |||||
dry. | ensuring that the same (right hand) side of core was | ||||||
• For all sample types, the nature, quality and | sampled. Where no orientation line existed, core was joined | ||||||
appropriateness of the sample preparation | up in the trays as accurately as possible and an interpreted | ||||||
technique. | cut line was drawn on the core so that the same side of core | ||||||
• Quality control procedures adopted for all | was consistently sampled. | ||||||
• | Quarter core sampling was used for duplicate samples. | ||||||
sub-sampling stages to maximise | |||||||
representivity of samples. | Duplicate samples were located at the Geologist's | ||||||
• Measures taken to ensure that the sampling | discretion, usually where mineralisation was interpreted. | ||||||
• | Certified reference material (CRM) standards and blanks | ||||||
is representative of the in situ material | |||||||
collected, including for instance results for | were inserted at the geologist's discretion on a roughly 1 in | ||||||
field duplicate/second-half sampling. | 20 sample bases. | ||||||
• Whether sample sizes are appropriate to the | |||||||
grain size of the material being sampled. | |||||||
Quality of assay | • | The nature, quality and appropriateness of | • | Samples routinely analysed for gold using the 40gram Fire | |||
data and | the assaying and laboratory procedures used | Assay digest method with an AAS finish at Bureau Veritas's | |||||
laboratory tests | and whether the technique is considered | Kalgoorlie Laboratory. | |||||
partial or total. | • | Quality control process and internal laboratory checks | |||||
• For geophysical tools, spectrometers, | demonstrate acceptable levels of | accuracy. | At | the | |||
handheld XRF instruments, etc, the | laboratory regular assay repeats, lab standards, checks and | ||||||
parameters used in determining the analysis | blanks were analysed. | ||||||
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 of | • | The verification of significant intersections | • | The results have been reviewed and verified by alternative | |||
sampling and | by either independent or alternative | company personnel. | |||||
assaying | company personnel. | • | No holes were planned to twin prior drill holes. | ||||
• | The use of twinned holes. | ||||||
• | Capture of field logging is electronic using Toughbook | ||||||
• Documentation of primary data, data entry | hardware and Logchief software. Logged data is then | ||||||
procedures, data verification, data storage | exported as an excel spreadsheet to the Company's external | ||||||
(physical and electronic) protocols. | database managers which is then loaded to the Company's | ||||||
• Discuss any adjustment to assay data. | DATASHED database and validation checks completed to | ||||||
ensure data accuracy. Assay files are received electronically | |||||||
from the laboratory and filed to the Company's server, and | |||||||
provided to the external database manager. | |||||||
• | There has been no adjustment to the assay data. | The | |||||
primary gold (Au) field reported by the laboratory is the | |||||||
priority value used for plotting, interrogating and reporting. | |||||||
Location of data | • | Accuracy and quality of surveys used to | • | Drill hole positions were surveyed using a DGPS operated by | |||
points | locate drill holes (collar and down-hole | a third-party contracting surveyor. | The same contractor | ||||
surveys), trenches, mine workings and other | was used once drilling was completed to pick-up collar | ||||||
locations used in Mineral Resource | positions using a DGPS. Down holes surveys were completed | ||||||
estimation. | by Raglan drill crew using a multi-shot gyro which records a | ||||||
• Specification of the grid system used. | survey every <5m down the hole. | ||||||
• | Quality and adequacy of topographic | • | Grid System - MGA94 Zone 51. Topographic elevation | ||||
control. | captured by using the differential GPS. | ||||||
Data spacing and | • | Data spacing for reporting of Exploration | • | Hole spacing at approximately 80m spaced intervals | |||
distribution | Results. | • | Mineralisation at Hang Glider Hill appears constrained to a | ||||
• Whether the data spacing and distribution is | highly deformed felsic to intermediate volcanic which has | ||||||
sufficient to establish the degree of | been extensively quartz-carbonate veined and biotite | ||||||
geological and grade continuity appropriate | altered. It is interpreted that this represents a thrust fault | ||||||
for the Mineral Resource and Ore Reserve | zone. The orientation of which has initially been interpreted | ||||||
estimation procedure(s) and classifications | to strike approximately north-westsouth-east, hence the | ||||||
applied. | drill orientation, however this is early stage exploration and | ||||||
geological interpretation is ongoing. | |||||||
• | Due to the fact this is early stage exploration, the first drill | ||||||
Criteria | JORC Code Explanation | Commentary | |
Data spacing and | • Whether sample compositing has been | hole (19HGDD001) was sampled in its entirety. Sampling | |
distribution | applied. | obeyed standard sampling protocol with sample intervals | |
controlled by the min/max intervals and geological and | |||
alteration boundaries. Reported assay results are | |||
composited into an interval where samples >0.25g/t Au with | |||
a maximum of 2m internal dilution are reported. | |||
Orientation of | • Whether the orientation of sampling | • | The roughly North-East orientated drill traverses considered |
data in relation to | achieves unbiased sampling of possible | effective to evaluate the roughly North-West trending | |
geological | structures and the extent to which this is | stratigraphy. | |
structure | known, considering the deposit type. | • | The drill orientation is a more effective test of "true" width |
• If the relationship between the drilling | |||
of the host rock due to the fact the host rock unit is striking | |||
orientation and the orientation of key | roughly North-West/South-East. | ||
mineralised structures is considered to have | • | The holes represent the first significant exploration by | |
introduced a sampling bias, this should be | |||
Lefroy Exploration in this area and were drilled primarily to | |||
assessed and reported if material. | |||
identify the geological characteristics of the prospect. The | |||
holes were planned based on knowledge acquired from | |||
previous explorers and outcrop mapping which suggested | |||
the drill orientation would maximise the potential to | |||
intersect geology and mineralising structures at an | |||
orientation which was roughly perpendicular to their | |||
orientation. Therefore reducing the sampling bias. | |||
Sample security | • The measures taken to ensure sample | • | Samples were bagged in labelled and numbered polyweave |
security. | or plastic bags, collected and personally delivered to the | ||
Bureau Veritas Laboratory (Kalgoorlie) by Company field | |||
personnel. Samples were then sorted and checked for | |||
inconsistencies against lodged Submission sheet by Bureau | |||
Veritas staff. | |||
• | Bureau Veritas checked the samples received against the | ||
Lefroy Exploration Limited (LEX) submission sheet to notify | |||
of any missing or extra samples. Following analysis, the | |||
sample, pulps and residues are retained by the laboratory in | |||
a secure storage yard. | |||
Audits or reviews | • The results of any audits or reviews of | • | All sampling and analytical results of the drill program were |
sampling techniques and data. | reviewed by the Senior Exploration Geologist and Managing | ||
Director. Anomalous gold intersections were checked | |||
against library core photos and logging to correlate with | |||
geology. QAQC reports are auto generated by the database | |||
managers and reviewed by staff. |
Section 2: REPORTING OF EXPLORATION RESULTS - LEFROY PROJECT- Hang Glider Hill - October 2019 Diamond Drilling
Criteria | JORC Code Explanation | Commentary | ||
Mineral | • | Type, reference name/number, location and | • | The Lefroy Project is located approximately 50 km in |
tenement and | ownership including agreements or material | south east from Kalgoorlie, Western Australia and | ||
land tenure | issues with third parties such as joint | consists of a contiguous package of wholly owned | ||
status | ventures, partnerships, overriding royalties, | tenements held under title by LEX or its wholly owned | ||
native title interests, historical sites, | subsidiary Monger Exploration Pty Ltd. The work | |||
wilderness or national park and | described in this report was completed on a | |||
environmental settings. | Exploration lease E 26/183. | |||
• | The security of the tenure held at the time of | |||
• | E 26/183 is held 100% by Monger Exploration Pty Ltd a | |||
reporting along with any known | wholly owned subsidiary of Lefroy Exploration Limited | |||
impediments to obtaining a licence to | • | The tenements are current and in good standing with | ||
operate in the area. | ||||
the Department of Mines and Petroleum (DMP) of | ||||
Western Australia. | ||||
Exploration | • | Acknowledgment and appraisal of | • | Previous RAB and RC drilling was conducted by |
done by other | exploration by other parties. | Sovereign Resources NL in the early 1990's. Most of | ||
parties | the work involved shallow RAB which identified gold | |||
anomalous results on Hang Glider Hill. This was | ||||
followed up by deeper RC which confirmed the | ||||
presence of gold mineralisation in a highly foliated | ||||
felsic volcanic rock. Only early stage exploration was | ||||
conducted and since then has received no follow up | ||||
work. Details of this drilling sourced from WAMEX | ||||
item A39666 (Mineral exploration reports stored as | ||||
open-file reports by the Geological Survey of Western | ||||
Australian) were compiled by LEX and incorporated | ||||
into the Company's database. Given the historical | ||||
nature of and type of drilling the Company places a | ||||
low confidence on the data, but nevertheless used to | ||||
guide exploration. | ||||
Geology | • | Deposit type, geological setting and style of | • | The Lefroy Project is located in the southern part of |
mineralisation. | the Norseman Wiluna Greenstone Belt and straddles | |||
the triple junction of three crustal units, the Parker, | ||||
Boorara and Bulong Domain. The Lefroy project | ||||
tenements are mostly covered by alluvial, colluvial | ||||
and lacustrine material with very little outcrop. Hang | ||||
Glider Hill is a topographic high thought to represent | ||||
a thrusted fault zone of felsic to intermediate | ||||
volcanic rocks in contact with Ultramafic and basaltic | ||||
volcanic rocks. Gold mineralisation is associated with | ||||
late quartz-carbonate veins within the thrust fault | ||||
zone in the felsic to intermediate volcanic rocks. The | ||||
prospect lies close to the GSWA's position for the | ||||
regional Mt Monger fault with historic interpretation | ||||
of magnetic imagery suggesting the presence of a | ||||
roughly north-north-west strike fault referred to as | ||||
the Isles Fault (Sovereign Resources NL, 1993). | ||||
Drill hole | • | A summary of all information material to the | • | Table containing drill hole collar, survey and |
Information | understanding of the exploration results | intersection data for material (gold intersections | ||
including a tabulation of the following | >0.25gpt Au with a max of 2m internal dilution) drill | |||
information for all Material drill holes: | holes are included in the Table in the body of the | |||
• easting and northing of the drill hole | announcement. | |||
collar | • | No Information has been excluded. | ||
• elevation or RL (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. |
Criteria | JORC Code Explanation | Commentary | |
Data | • In reporting Exploration Results, weighting | • | All report grades have been length weighted. High |
aggregation | averaging techniques, maximum and/or | grades have not been cut. A lower cut off of 0.25gpt | |
methods | minimum grade truncations (eg cutting of high | Au has been used to identify significant results | |
grades) and cut-off grades are usually Material | (intersections). | ||
and should be stated. | • | Where present, higher grade values are included in | |
• Where aggregate intercepts incorporate short | |||
the intercepts table and assay values equal to or > 1.0 | |||
lengths of high grade results and longer lengths | g/t Au have been stated on a separate line below the | ||
of low grade results, the procedure used for such | intercept assigned with the text 'includes'. | ||
aggregation should be stated and some typical | • | No metal equivalent values or formulas used. | |
examples of such aggregations should be shown | |||
• | Reported diamond drill results have been results have | ||
in detail. | |||
been calculated using samples that vary in length from | |||
• The assumptions used for any reporting of metal | |||
0.2m to 1.2m but nominally 1.0m. No metal equivalent | |||
equivalent values should be clearly stated. | |||
values or formulas used. | |||
• | Where core loss is measured, a gold value of 0 ppm is | ||
applied for the length weighted interval for which this | |||
would apply and included in the intercept calculation | |||
and would count in the internal dilution. | |||
Relationship | • These relationships are particularly important in | • | All results are based on down-hole metres. |
between | the reporting of Exploration Results. | • | Previous drill coverage has provided guidance for the |
mineralisation | • If the geometry of the mineralisation with | presence of low angle thrust faults dipping toward the | |
widths and | respect to the drill hole angle is known, its | south-west roughly discordant to the north-west strike | |
intercept | nature should be reported. | of the geological package. Mineralised intervals | |
lengths | • If it is not known and only the down hole lengths | represent a down-hole length as work on the | |
are reported, there should be a clear statement | orientation of the mineralised veins is still on-going | ||
to this effect (eg 'down hole length, true width | and exploration is still in its infancy at Hang Glider Hill. | ||
not known'). | |||
Diagrams | • Appropriate maps and sections (with scales) and | • | Appropriate summary diagrams (section & plan) are |
tabulations of intercepts should be included for | included in the accompanying announcement. | ||
any significant discovery being reported. These | |||
should include, but not be limited to a plan view | |||
of drill hole collar locations and appropriate | |||
sectional views. | |||
Balanced | • Where comprehensive reporting of all | • | Significant assay results are provided in Table 1 for the |
reporting | Exploration Results is not practicable, | recent LEX DD drill program. | |
representative reporting of both low and high | • | Drill holes with no significant results are reported. | |
grades and/or widths should be practiced to | |||
• | Significant assay results from historical drilling are not | ||
avoid misleading reporting of Exploration | |||
included as much of the historic drilling was rotary air | |||
Results. | |||
blast (RAB) drilling and results cannot be appropriately | |||
validated with confidence. | |||
Other | • Other exploration data, if meaningful and | • | All relevant data has been included within this report. |
substantive | material, should be reported including (but not | ||
exploration data | limited to): geological 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 | • | The appropriate next stage of exploration planning is |
(eg tests for lateral extensions or depth | currently underway and noted in the body of the | ||
extensions or large-scalestep-out drilling). | report. | ||
• Diagrams clearly highlighting the areas of | |||
possible extensions, including the main | |||
geological interpretations and future drilling | |||
areas, provided this information is not | |||
commercially sensitive. |
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Lefroy Exploration Ltd. published this content on 29 November 2019 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 28 November 2019 23:27:03 UTC