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IMAGE RESOURCES NL — Interim / Quarterly Report 2014
Jan 29, 2015
65117_rns_2015-01-29_1583120f-7f77-4fbb-a044-3dcda2141835.pdf
Interim / Quarterly Report
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Quarterly Report – for the quarter ended 31 December 2014
| Image Resources NL ABN 57 063 977 579 ASX Code IMA Contact Details 5 Mumford Place Balcatta WA 6021 T +61 8 9485 2410 E: [email protected] W: imageres.com.au Issued Capital Shares – Quoted 157,590,129 Options – Unquoted 5,040,000 (various terms) Cash at end of quarter $775,000 Board & Management John Jones (NED Chairman) Peter Thomas (Non-Executive Director) George Sakalidis (Exploration Director) Collis Thorp (Chief Executive Officer) Jeff Williams (Non-Executive Director) |
Highlights Operational activities • The main focus of operational activities has been directed towards developing an operating strategy for the exploitation of our resources. As previously reported we have negotiations taking place that hopefully will lead to the commencement of production at Boonanarring in late 2015 or early 2016. These discussions are focused on existing producers with synergistic requirements, however they are incomplete and “commercially in confidence” and accordingly at this stage we are unable to fully describe the details of these possible transactions • Azure Capital have been appointed to assist in negotiations • As part of this strategy second hand plants have been inspected. Exploration activities • The Stage 1 drilling programme commenced in November 2014 and 116 holes totalling 4,254 metres have been drilled out of the 257 holes planned for this phase. Initial assay results for 52 of these holes have been received to date and results are very promising with a new parallel strand, named the East Gingin North strand, delineated by initial drilling over a 1.5 km strike length. • Planning for the remainder of Stage 1 drilling is progressing with Image having Department of Mines and Petroleum (Environment) approval to drill a further 155 holes. Drilling is expected to restart in early February 2015. • A representative composite of drill sample material from the first three years production from the Boonanarring resource is being prepared in order to produce a Heavy Mineral (HM) concentrate for future metallurgical test work and for external interested parties. The composite will be comprised of existing sample material and sample from planned infill drilling. • Land access negotiations with the landowners throughout the project area have been progressing during the quarter and will be ongoing as we further move to secure our land position for the project and for the Stage 2 drilling programme. • Ground Magnetic surveys were completed at Munbinia West and Gingin South early in the quarter and results were incorporated into Images’ regional interpreted mineralisation models to assist in drill programme plans. Corporate • On the 28thJanuary 2015 Image received $203,675 from the Australian Taxation Office for a Research and Development claim. • Diatreme Resources Limited executed a conditional purchase agreement with Image to acquire Images’ Cyclone Extended Heavy Mineral Resource (R69/1) on 10th November 2014. |
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New Boonanarring strand delineated by recent first pass drilling
Image’s Stage 1 drilling programme commenced in November 2014 and 116 holes totalling 4,254 metres have been completed of the 257 holes planned in the initial phase (Figure 1 to Figure 4 and Table 1). The aim of the drilling is to make Boonanarring a long life standalone operation and concurrently expand other projects into potential parallel operations for Image and or other producers (Figure 1). Initial assay results for 52 of these holes have been received to date and all holes drilled in this current programme are within the Red Gully – Boonanarring - Gingin North - Gingin South - Chandala region.
Within the Boonanarring South area the assay results are very promising with a new parallel strand (named East Gingin North strand) delineated by initial drilling over a 1.5 km length. Image plan to further test this new strand, which is a target having an 8 km strike length and which potentially links the eastern side of the Gingin North Resource to the western side of the Boonanarring Resource. Some of the better results include 3 m @ 23.3% HM from 16m in drill hole IX00067 and 6m @ 6.4% HM from 14 m in drill hole IX00060. Refer to Table 3 for a full list of significant intercepts. Although at the same Relative Level (RL) as the Boonanarring Resource, the East Gingin North strand mineralisation is at a shallower depth from surface due to the effect of the scarp covering the Boonanarring Resource.
Another important new target just east of the 5.5km Gingin South Resource area has the potential for an eastern parallel strand that is up to 14km long. The assay results from the first 21 holes within the Gingin South area confirm that the Gingin South Resource continues further east and is shown up on five separate lines spaced 200 to 400m apart (Figure 3 and Table 3). Some of the better results include 6m @ 10.0%HM from 27m in drill hole IX00021 and 6m @ 4.8%HM from 31m in drill hole IX00018. The significance of this eastern 14km long parallel strand may be similar to what has occurred at Boonanarring where the eastern strand has a much higher average HM grade and zircon percentage than the western strand and also has the potential to significantly increase the resource size at Gingin South.
The third target being tested by Image in the current programme is the northern extension of the high grade and high zircon Eastern Strand of the Boonanarring deposit, where the average grade in the Block A 210 East strand is estimated to have an Indicated Mineral Resource[1] grading 19.2% HM with the HM containing 26.4% Zircon. Image has completed 12 new drill holes near this northern extension, and assay results are pending (refer Figure 4). Additionally and importantly, a number of drill lines completed in the 1990s are 2km and 5km along strike from the northern end of the Boonanarring Mineral Resource. Significantly, the high grade zones drilled from the 1990s drilling include 6m grading 6.7% HM (Iluka drill hole RG0045 from 27m down hole), which correlates with the predicted NNW extension of Boonanarring.
Importantly, some of the previous drilling did not drill to the target depth of mineralisation and further infill and deeper holes are required to test the grade and thickness of this potential extension. Note in some cases these planned holes are very close to the Brand highway and permission for access will be required
Other areas drilled in this campaign include Red Gully, Chandala and some infill drilling within the Boonanarring Resource. These assay results are pending.
The Director of Exploration George Sakalidis commented:
“I am very excited with the early success of the first part of the Stage 1 drilling programme in outlining new discoveries and targets in the vicinity of the Boonanarring Resource, which will potentially allow the Company to develop this project as a major long life operation. Ensuing drilling programmes will be predominately concentrating and following up these results. Access and POW (Programme of Works) are
1 Refer to the 31 May ASX release http://www.asx.com.au/asxpdf/20130531/pdf/42g6v9v0jxn3hg.pdf for full details of the Boonanarring Mineral Resource/Reserve Estimate ................................................................................................................................... Page 2
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progressing well which will permit the company to be able to test these new exciting Target zones over the next few months.”
All the drilling costs for the 257 holes planned for this stage 1 programme have been pre-paid by a placement to a major WA drilling company. The drilling programme started on the 14 November and priority targets will be tested over several months.
Cyclone Extended Heavy Mineral Resource
Diatreme Resources Limited entered into a conditional purchase agreement with Image for the Cyclone Extended Heavy Mineral Resource (Serpentine Lakes - R69/1) in the Eucla Basin, Western Australia. The conditional purchase agreement was executed on 10th November 2014 and key commercial terms of the agreement are as follows:
The agreement consists of a consideration of $435,000 cash to be paid in two separate tranches.
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Tranche 1 : Non-refundable deposit of $20,000 payable at agreement execution 10th November 2014 which has been received;
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Tranche 2: Remaining $415,000 to be paid within 120 days of the agreement execution date linked to a successful capital raising being undertaken by Diatreme within that period. Diatreme has not yet confirmed raising more than the $415,000 required to complete of the transaction as at the date of this report.
A production royalty of 1% will be retained by Image on all Heavy Mineral production within the area of the transferred tenement. Diatreme will have the option to acquire the royalty at an agreed value of $435,000 exercisable by the 1st January 2017. Should Diatreme choose not to exercise the option, the royalty will remain in place.
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Figure 1 Drilling programmes completed on Image Resources Gingin to Red Gully region in the North Perth Basin
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Figure 2 Boonanarring to Gingin North Strand Interpretations
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Figure 3 Gingin South Strand Interpretations
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Figure 4 Boonanarring North to Red Gully Strand Interpretations
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Table 1 AC Holes drilled Nov-Dec 2014
| Project | # Holes | Metres drilled |
|---|---|---|
| Boonanarring South | 67 | 2,476 |
| Chandala | 12 | 344 |
| GinginSouth | 21 | 812 |
| Red Gully | 16 | 622 |
| Total | 116 | 4,254 |
Table 2 Boonanarring South - East Gingin North strand Significant intercepts 2.5%HM over 2m (1m samples) with no internal dilution**
| Hole ID | Easting* | Northing* |
From (m) |
To (m) |
Width (m) |
Average OS % |
Average SL % |
Average HM % |
|---|---|---|---|---|---|---|---|---|
| IX00034 | 389939 | 6542291 | 7 | 9 | 2 | 18.99 | 27.70 | 4.25 |
| 14 | 19 | 5 | 11.77 | 20.45 | 3.71 | |||
| IX00035 | 389863 | 6542248 | 16 | 20 | 4 | 10.76 | 15.56 | 3.35 |
| 28 | 30 | 2 | 1.96 | 11.09 | 4.54 | |||
| IX00036 | 390040 | 6541885 | 23 | 26 | 3 | 0.56 | 22.74 | 3.22 |
| IX00037 | 390107 | 6541916 | 12 | 18 | 6 | 10.45 | 20.63 | 4.72 |
| IX00038 | 390189 | 6541935 | 9 | 15 | 6 | 11.53 | 30.73 | 4.35 |
| 23 | 25 | 2 | 1.77 | 10.75 | 3.64 | |||
| IX00039 | 390255 | 6541982 | 7 | 9 | 2 | 15.91 | 29.73 | 4.36 |
| IX00040 | 390331 | 6542013 | 36 | 38 | 2 | 7.12 | 12.82 | 3.18 |
| IX00043 | 390211 | 6541508 | 20 | 23 | 3 | 0.07 | 20.35 | 4.68 |
| IX00050 | 390324 | 6541131 | 14 | 21 | 7 | 5.52 | 16.68 | 4.00 |
| IX00052 | 390357 | 6541146 | 17 | 21 | 4 | 2.19 | 15.10 | 6.51 |
| IX00053 | 390384 | 6541158 | 17 | 19 | 2 | 0.08 | 15.23 | 5.67 |
| IX00055 | 390468 | 6541196 | 20 | 22 | 2 | 9.96 | 16.27 | 3.63 |
| IX00057 | 390608 | 6541263 | 3 | 6 | 3 | 22.96 | 16.17 | 7.48 |
| IX00060 | 390432 | 6540926 | 14 | 20 | 6 | 3.24 | 17.34 | 6.36 |
| IX00061 | 390465 | 6540937 | 17 | 20 | 3 | 2.73 | 16.53 | 6.54 |
| IX00067 | 390447 | 6540935 | 16 | 19 | 3 | 1.02 | 15.87 | 23.30 |
| IX00068 | 390462 | 6540851 | 18 | 20 | 2 | 7.01 | 13.68 | 8.31 |
| IX00069 | 390516 | 6540860 | 4 | 6 | 2 | 2.96 | 16.43 | 3.04 |
| *GDA94 MGA zone 50 |
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Table 3 Gingin South Significant intercepts 2.5%HM over 2m (1m samples) with no internal dilution**
| Hole ID | Easting* | Northing* |
From (m) |
To (m) |
Width (m) |
Average OS % |
Average SL % |
Average HM % |
|---|---|---|---|---|---|---|---|---|
| IX00013 | 397418 | 6526394 | 25 | 27 | 2 | 5.99 | 12.35 | 10.69 |
| IX00015 | 397524 | 6526180 | 32 | 34 | 2 | 1.85 | 8.53 | 4.55 |
| IX00017 | 397601 | 6526200 | 11 | 13 | 2 | 30.88 | 19.29 | 5.10 |
| IX00018 | 397545 | 6526183 | 31 | 37 | 6 | 5.18 | 13.26 | 4.76 |
| IX00021 | 397543 | 6526016 | 27 | 33 | 6 | 7.47 | 13.71 | 10.01 |
| IX00022 | 397576 | 6526022 | 13 | 15 | 2 | 27.94 | 14.24 | 7.74 |
| 17 | 19 | 2 | 24.76 | 23.69 | 3.13 | |||
| IX00025 | 397731 | 6525791 | 18 | 20 | 2 | 13.77 | 18.79 | 7.59 |
| 36 | 43 | 7 | 17.68 | 13.74 | 4.37 | |||
| IX00026 | 398558 | 6523864 | 15 | 18 | 3 | 29.03 | 22.74 | 8.71 |
| 32 | 34 | 2 | 21.06 | 26.04 | 3.82 | |||
| IX00033 | 397956 | 6525209 | 35 | 37 | 2 | 34.63 | 17.87 | 7.76 |
| *GDA94 MGA zone 50 |
** Data aggregation was computed using Micromine software. Intercepts were calculated when they equalled or exceed the specified minimum grade of 2.5% HM and minimum length of 2m with no internal dilution.
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Tenement Schedule in accordance with ASX Listing Rule 5.3.3
Tenements held at the end of the Quarter
| Location | Tenement | Nature of Interest |
Project | Equity (%) held at **start of Quarter ** |
Equity (%) held at **end of Quarter ** |
|---|---|---|---|---|---|
| WA | E28/1895 | Granted | KING (ERAYINIAJV) | 16.1% diluting | 16.1% diluting |
| WA | E28/2071 | Granted | TALCLAKE(ERAYNIAJV) | 16.1% diluting | 16.1% diluting |
| WA | E70/2636 | Granted | COOLJARLOO | 100% | 100% |
| WA | E70/2742 | Granted | CHANDALA(DerbyMines JV) | Earned 80% | Earned 80% |
| WA | E70/2844 | Granted | BIDAMINNA NTH | 100% | 100% |
| WA | E70/2898 | Granted | COOLJARLOO | 100% | 100% |
| WA | E70/3032 | Granted | GINGIN | 100% | 100% |
| WA | E70/3041 | Granted | REGANSFORDSOUTH | 100% | 100% |
| WA | E70/3100 | Granted | QUINNSHILL | 100% | 100% |
| WA | E70/3192 | Granted | BOOTINE | 100% | 100% |
| WA | E70/3298 | Granted | BIDAMINNA -PARK | 90% | 90% |
| WA | E70/3411 | Granted | REGANSFORD | 100% | 100% |
| WA | E70/3418 | Granted | BELL | 100% | 100% |
| WA | E70/3494 | Granted | BRYALANA | 100% | 100% |
| WA | E70/3720 | Granted | BLUE LAKE | 100% | 100% |
| WA | E70/3892 | Granted | CHAPMAN HILL | 100% | 100% |
| WA | E70/3966 | Granted | REGANSFORD WEST | 100% | 100% |
| WA | E70/3997 | Granted | MUNBINIA | 100% | 100% |
| WA | E70/4077 | Granted | DARLINGRANGE | 100% | 100% |
| WA | E70/4129 | Granted | MULLERING SOUTH | 100% | 100% |
| WA | E70/4130 | Granted | MULLERINGNORTH | 100% | 100% |
| WA | E70/4244 | Granted | WOOLKA | 100% | 100% |
| WA | E70/4245 | Granted | WINOOKA | 100% | 100% |
| WA | E70/4549 | Granted | HARRISBRIDGE | 100% | 100% |
| WA | M70/0448 | Granted | GINGINSOUTH | 100% | 100% |
| WA | M70/1192 | Granted | REDGULLY | 100% | 100% |
| WA | M70/1193 | Granted | GINGIN NORTH | 100% | 100% |
| WA | M70/1194 | Granted | BOONANARRING | 100% | 100% |
| WA | P70/1516 | Granted | COOLJARLOO | 100% | 100% |
| WA | P70/1540 | Granted | CADDASPRINGS | 100% | 100% |
| WA | M70/1311 | Granted | BOONANARRING | 100% | 100% |
| WA | G70/0250 | Granted | BOONANARRING | 100% | 100% |
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| WA | R70/0051 | Granted | COOLJARLOONORTH | 100% | 100% |
|---|---|---|---|---|---|
| WA | R69/0001 | Granted | SERPENTINE LAKES | 100% pending grant | 100% |
| WA | M70/1305 | Application | ATLAS | 100% pending grant | 100% pending grant |
| WA | P70/1520 | Application | COOLJARLOO | 100% pending grant | 100% pending grant |
| WA | E70/4572 | Granted | YARDARINO | 100% pending grant | 100% |
| WA | E70/4631 | Granted | MUNBINIA WEST | - | 100% |
| WA | E70/4656 | Granted | WINOOKA NORTH | - | 100% |
| WA | E70/4663 | Granted | BIBBYSPRINGS | - | 100% |
| WA | E70/4689 | Application | BOONANARRING | - | 100% pending grant |
Mining Tenements acquired during the Quarter
WA E70/4689 Application BOONANARRING - 100% pending grant
Mining Tenements disposed during the Quarter
| WA | E69/2034 | Surrendered | SERPENTINE LAKES | 100% | - |
|---|---|---|---|---|---|
| WA | E70/2825 | Surrendered | BIDAMINNASTH | 100% | - |
| WA | E70/3086 | Surrendered | GABY'SPEAK | 100% | - |
| WA | E70/3292 | Surrendered | COOLJARLOO (Matilda Minerals JV) |
Earning 70% | - |
| WA | E70/3328 | Surrendered | VERNE HILL(COOLJARLOO) | 100% | - |
| WA | E70/4583 | Surrendered | TUTUNUP | 100% pending grant | - |
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Table 1 – North Perth Basin Resources and Reserves
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- Refer to the 16 September 2013 ASX release: http://www.imageres.com.au/images/joomd/1380783038IMA13_09_16ASXRelease ResourcesandReservesClarification.pdf for the Resources and Reserves Clarification and 31 May ASX release http://www.asx.com.au/asxpdf/20130531/pdf/42g6v9v0jxn3hg.pdf for full details of the Boonanarring Mineral Resource/Reserve Estimate
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J O R C C O D E , 2 0 1 2 E D I T I O N – T A B L E
Section 1 Sampling Techniques and Data
| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| Sampling techniques |
• Nature and quality of sampling (eg cut channels, random chips, or specific specialised industry standard measurement tools appropriate to the minerals under investigation, such as down hole gamma sondes, or handheld XRF instruments, etc). These examples should not be taken as limiting the broad meaning of sampling. • 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. |
• All drill holes reported in this release are vertically oriented, reverse-circulation air-core (RCAC) drill holes. |
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J O R C C O D E , 2 0 1 2 E D I T I O N – T A B L E
Section 1 Sampling Techniques and Data
| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| Unusual commodities or mineralisation types (eg submarine nodules) may warrant disclosure of detailed information. |
||
| Drilling techniques |
• Drill type (eg core, reverse circulation, open-hole hammer, rotary air blast, 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). |
• All RCAC drill holes are drilled vertically using an NQ-sized (63.5 mm diameter) drill bit. • Water injection is used to convert the sample to a slurry so it can be incrementally sampled by a rotary splitter. |
| Drill sample recovery |
• Nature and quality of sampling (eg cut channels, random chips, or specific specialised industry standard measurement tools appropriate to the minerals under investigation, such as down hole gamma sondes, or handheld XRF instruments, etc). These examples should not be taken as limiting the broad meaning of sampling. • 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 |
• At the drill site, Image’s geologist estimates sample recovery qualitatively (as good, moderate or poor) for each 1 m down hole sampling interval. Specifically, the supervising geologist visually estimates the volume recovered to sample and reject bags based on prior experience as to what constitutes good recovery. • Image found that of the 157 samples (that have a grade ≥ 2.5% HM) that are the subject of this release, 144 (92%) have good recovery, 3 have moderately good recovery and 10 have poor recovery. • Image also monitors recovery through the mass of the laboratory sample, which is recorded prior to despatch and again on delivery to the laboratory. The mass variation in the laboratory samples can then be correlated back to the original total sample. |
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J O R C C O D E , 2 0 1 2 E D I T I O N – T A B L E
Section 1 Sampling Techniques and Data
| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| 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. |
||
| Logging | • Whether core and chip samples have been geologically and geotechnically logged to a level of detail to support appropriate Mineral Resource estimation, mining studies and metallurgical studies. • Whether logging is qualitative or quantitative in nature. Core (or costean, channel, etc) photography. • The total length and percentage of the relevant intersections logged. |
• Image’s supervising geologist logs the sample reject material at the rig and pans a small sub sample of the reject, to visually estimate the proportions of sands, heavy mineral sands, ‘slimes’ (clays), and oversize (rock chips) in each sample, in a semi-quantitative manner. • The geologist also logs colour, grainsize, an estimate of induration (a hardness estimate) and sample ‘washability’ (ease of separation of slimes from sands by manual attrition). • To preclude data entry and transcription errors, the logging data is captured into a digital data logger at the rig, which contains pre-set logging codes. No photographs of samples are taken. • The digital logs are downloaded daily and emailed to Image’s head office for data security and compilation into the main database server. • Samples visually estimated by the geologist to contain more than 0.5% HM (by weight) are despatched for analysis alongwith the 1 m intervals above and below the |
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J O R C C O D E , 2 0 1 2 E D I T I O N – T A B L E
Section 1 Sampling Techniques and Data
| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| mineralised interval. • The level and detail of logging is of sufficient quality to support any potential future Mineral Resource Estimates • All (100%) of the drilling is logged. |
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| Sub- sampling techniques and sample preparation |
• If core, whether cut or sawn and whether quarter, half or all core taken. • If non-core, whether riffled, tube sampled, rotary split, etc and whether sampled wet or dry. • For all sample types, the nature, quality and 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 the material beingsampled. |
• All drilling samples are collected over 1 m down hole intervals, with sample lengths determined by 1 m marks on the rig mast. • The sample from the internal RC rods is directed to a cyclone and then through a ‘rotating-chute’ custom-built splitting device. This device allows different fraction splits from the cyclone sample stream to be directed to either 25 cm by 35 cm calico bags (as the laboratory despatch samples) or to large plastic polyweave bags for the sample rejects. The rotary splitter directs≈10 increments from the stream to the laboratory despatch samples, for a 1 m long down hole sampling interval. • Two (replicate) 1/8 mass splits (each≈1.25 kg) are collected from the rotary splitter into two pre-numbered calico bags for each 1 m down hole interval. A selection of the replicate samples are later collected and analysed to quantify field sampling precision, or as samples contributing to potential future metallurgical composites. • To monitor sample representation and sample number correctness, Image weighs the laboratory despatch samples prior to despatch. The laboratory then weighs the received sample and reports the mass to Image. This quality control ensures no mix up of sample numbers and is also a proxy for sample recovery. • Image considers the nature, quality and size of the sub samples collected are consistent with best industry practices of mineral sands explorers in the Perth Basin region. |
| Quality of assay data and laboratory tests |
• The nature, quality and appropriateness of the assaying and laboratory procedures used and whether the technique is consideredpartial or |
• The laboratory despatch samples are prepared by Western Geolabs (in Bellevue Western Australia) by first, wet weighing, then drying the sample for 5 to 8 hrs in an oven at 110°C. The dry weight is then recorded using a laboratory digital scale. • The dried sample is then crushed(usingmanual |
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J O R C C O D E , 2 0 1 2 E D I T I O N – T A B L E
Section 1 Sampling Techniques and Data
| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| total. • For geophysical tools, spectrometers, handheld XRF instruments, etc, the parameters used in determining the 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. |
pummelling) until all clay and sand materials in the sample pass through a 3.3 mm screen. In samples where (>3.3 mm) rock fragments are found after pummelling and screening, the mass of the fragments is recorded and the material discarded. • The <3.3 mm sample is then hand mixed prior to splitting through a single tier riffle splitter (16 chutes each with 8 mm aperture), as many times as required to prepare a 100 g ± 5 g sub sample. The actual mass retained is recorded using a laboratory digital scale. • The riffle splitter sub sample is then wetted, undergoes further manual attrition to break up clays, before the <63 µm clays (slimes) are washed from the sample (de-sliming) using a jet wash and 63µm screen. • The <63µm slimes (clays) are discarded and the >63µm sub sample is placed in a metal tray and oven dried. When dry, the >63µm sub sample is put through a 1 mm sieve and the mass of the screen oversize (>1 mm) is recorded on a digital balance. The oversize is then discarded. • The de-slimed sand fraction (>63µm & < 1mm) sub sample is then weighed on a digital scale before being separated into two fractions by mixing the sample in a glass separation funnel with a heavy liquid (TBE) of density 2.95 g/cm3. • Once sufficient time has passed to allow the sample to separate and settle, the <2.95 g/cm3, ‘floats’ fraction is collected and discarded. • The <2.95 g/cm3, ‘sinks’ fraction is collected from the funnel into a filter paper, then washed with acetone to remove the TBE. The sinks are then dried and the mass recorded on a digital scale. • From the process above the laboratory reports the wet mass received, dry received mass, the mass of (>3.3 mm) rock fragments or coarse oversize (if any), the mass of the 100 g± 5 g, sub sample, and the mass of the (HM) sink fraction. • The procedure can be considered a total analysis for mass concentration of heavy minerals in each sample. The method is also consistent with best industry practices employed by mineral sands explorers in the Perth Basin region. • For quality control the laboratory: o Uses certified masses to verifydailythe accuracyof all |
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J O R C C O D E , 2 0 1 2 E D I T I O N – T A B L E
Section 1 Sampling Techniques and Data
| Criteria | JORC Code explanation | Commentary |
|---|---|---|
laboratory mass scales.o Prepares a replicate sample at a frequency of 2 forevery 25 routine samples analysed. o Uses a hydrometer to test daily the density of the TBEused for HM separation • For each laboratory despatch (ranging from≈150 to≈350 samples) Image includes blind standard reference samples (SRMs) that contain known (to Image) concentrations of heavy and valuable heavy minerals. Image inserts the SRMs, at a frequency of 1 in 30 sample submitted to the laboratory. • Image is yet select and analyse field-replicate samples from field-sample replicates collected to quantify field sampling precision. This work will be completed at the end of the current field programme along with external laboratory checks. Laboratory replicate sample results are being reviewed. • Blanks samples for testing of cross contamination are not deemed necessary for the style of mineralisation under consideration. |
||
| Verification of sampling and assaying |
• The verification of significant intersections by either independent or alternative company personnel. • The use of twinned holes. • Documentation of primary data, data entry procedures, data verification, data storage (physical and electronic) protocols. • Discuss any adjustment to assay data. |
• The logging of significant intersections reported in this release has been verified by alternative company personnel. • No twin holes have been drilled in the current programme. • Logging is captured at the rig using a data recorder, downloaded daily and emailed to head office data services for incorporation into the main database. • Assay results from the laboratory are received by email in standard spreadsheet templates and merged with logging results in-house. • There are no adjustments to original laboratory results. |
| Location of data points |
• Accuracy and quality of surveys used to locate drill holes (collar and down-hole surveys), trenches, mine workings and other locations used in Mineral Resource estimation. |
• The drill hole collar locations are captured by one of Image’s rig team following the completion of each drill hole, using a hand held GPS with nominal accuracy of≈±15 m. Elevations have also been determined with hand-held GPS. More accurate locations will be determined in future by a registered surveyor using DGPS equipment. • The grid system for reporting results is the MGA Zone 50 |
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J O R C C O D E , 2 0 1 2 E D I T I O N – T A B L E
Section 1 Sampling Techniques and Data
| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| • Specification of the grid system used. • Quality and adequacy of topographic control. |
projection and the GDA94 elevation datum. • No topographic control has been considered at this time. |
|
| Data spacing and distribution |
• Data spacing for reporting of Exploration Results. • Whether the data spacing and distribution is sufficient to establish the degree of geological and grade continuity appropriate for the Mineral Resource and Ore Reserve estimation procedure(s) and classifications applied. • Whether sample compositing has been applied. |
• The drill holes reported in this release are located on≈200 m spaced drill lines along the strike of mineralised strands, and at≈20 m intervals across strike intervals. • No mineral resources have been estimated from the reported drilling but the spacing is commensurate with that used to define Inferred Mineral Resources in Image’s other projects in the region. • No sample compositing has been applied – all results are from 1 m long down hole sample intervals. |
| Orientation of data in relation to geological structure |
• Whether the orientation of sampling achieves unbiased sampling of possible structures and the extent to which this is known, considering the deposit type. • If the relationship between the drilling orientation and the orientation of key mineralised structures is considered to have introduced a sampling bias, this should be assessed and reported if material. |
• All drill holes are vertical and intersect sub-horizontal strata. As such Image considers that it is highly unlikely that the orientation of drilling relative to the well understood structure of minerals sands strands, would result in a sampling bias. |
| Sample security |
• The measures taken to ensure sample security. |
• All samples are collected from site by Image’s staff as soon as practicable once drilling is completed and then delivered to Image’s locked storage sheds. • Image’s staff also deliver samples to the laboratory and collect heavy mineral floats from the laboratory, which are also stored in Images locked storage |
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J O R C C O D E , 2 0 1 2 E D I T I O N – T A B L E
Section 1 Sampling Techniques and Data
| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| • Image considers there is negligible risk of deliberate or accidental contamination of samples. Occasional sample mix-ups are usually corrected using Images checking and quality control procedures. |
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| Audits or reviews |
• The results of any audits or reviews of sampling techniques and data. |
• The results and logging have been reviewed internally by Images senior exploration personnel including checking of masses despatched and delivered, checking of SRM results, and verification logging of significant intercepts. |
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