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DEEP YELLOW LIMITED — Capital/Financing Update 2011
Nov 6, 2011
64808_rns_2011-11-06_73e637c1-fa26-46e1-88e2-2593267f16b9.pdf
Capital/Financing Update
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ASX Announcement
ASX: DYL
7 November 2011
DEEP YELLOW TRIPLES ONGOLO ALASKITE RESOURCE
KEY POINTS
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The Ongolo Alaskite Deposit JORC Compliant Resource has been tripled to 20.5 Mt at 400 ppm U3O8 for 18 Mlbs U3O8 at a 250 ppm cut-off.
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The updated Indicated and Inferred Mineral Resource estimate was completed by Coffey Mining Pty Ltd (Perth).
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The new Resource represents an increase of 11.8Mlbs of contained U3O8 compared to the May 2011 resource estimate.
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Approximately 73% of the 18Mlbs resource (13.2Mlbs) is classified in the Indicated category.
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The Omahola Project hard rock Resource base is now 38.1 Mt at an average grade of 404 ppm U3O8 for 33.7 Mlbs U3O8, whilst the total project resource is 52 Mt at an average grade of 338 ppm U3O8 for 38.6 Mlbs U3O8.
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An additional resource upgrade is expected before the end of the year for the Ongolo satellite, the MS7 deposit.
Advanced uranium explorer, Deep Yellow Limited (ASX : DYL ) is pleased to announce that it has more than tripled the Mineral Resource estimate for its Ongolo Alaskite deposit in Namibia. The deposit, located on EPL 3496, is held 100% by DYL’s wholly-owned Namibian subsidiary, Reptile Uranium Namibia (Pty) Ltd (RUN). Coffey Mining Pty Ltd (Perth) compiled the JORC Compliant estimate.
The Indicated and Inferred Mineral Resource estimate, of 20.5 Mt at 400 ppm U3O8 for 18 Mlbs U3O8 at a 250 ppm cut-off, increases the total Omahola Project Resource base to 38.6 Mlbs U3O8 at an average grade of 338 ppm U3O8 (Appendix 1) and DYL’s Namibian resource base to in excess of 107 Mlbs U3O8 (Appendix 4).
Commenting on the outstanding result, Deep Yellow Managing Director Greg Cochran said that the new Resource reflected Ongolo’s true potential. “We have concentrated our exploration efforts primarily along the INCA-Ongolo trend and have been consistently rewarded with wide, high grade intersections. These have now been included to give us a tripling of the Ongolo JORC Resource, which remains open along strike. We can expect more success from this region, including a resource upgrade on the satellite MS7 deposit, before the end of the year.”
ENDS
Level 1, 329 Hay Street, Subiaco, WA 6008 / PO Box 1770, Subiaco, WA 6904 Tel : 61 8 9286 6999 / Fax : 61 8 9286 6969 / ABN 97 006 391 948 Email: [email protected] / Website: www.deepyellow.com.au
Ongolo Alaskite Deposit Tripled
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For further information regarding this announcement, contact:
Greg Cochran Phone: +61 8 9286 6999 Managing Director Email: [email protected] Media Phone: +61 8 6314 6302 Annette Ellis Email: [email protected] For further information on the Company and its projects - visit the website at www.deepyellow.com.au
About Deep Yellow Limited
Deep Yellow Limited (DYL) is an ASX-listed, advanced stage uranium exploration Company with extensive operations in the southern African nation of Namibia and in Australia. It also has a listing on the NSX.
DYL’s primary focus is in Namibia where its operations are conducted by its 100% owned subsidiary Reptile Uranium Namibia (Pty) Ltd (RUN). Its flagship is the Omahola Project currently under Pre-Feasibility Study with concurrent resource drill-outs on the high grade Ongolo Alaskite – INCA trend. It is also assessing the Shiyela Magnetite deposit located just 45 kilometres from the Namibian port of Walvis Bay.
In Australia the Company is focused on resource delineation of mid to high grade discoveries in the Mount Isa district in Queensland and also owns the Napperby Uranium Project and numerous exploration tenements in the Northern Territory.
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Figure 1: INCA – Ongolo Trend Showing Ongolo Resource Outline at 250ppm U3O8 Cut-Off
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Appendix 1 – Omahola Project Resource Summary – November 2011
| Cut-off (ppm U3O8) Tonnes (M) U3O8 (ppm) |
U3O8 (t) |
U3O8 (Mlb) |
||
|---|---|---|---|---|
| Deposit | Category | |||
| INCA INCA Ongolo# Ongolo# MS7# Tubas Red Sand Tubas Red Sand |
Indicated Inferred Indicated Inferred Inferred Measured/Indicated Inferred |
250 9.4 385 250 5.5 445 250 14.7 410 250 5.8 380 300 2.7 400 100 3.2 168 100 10.7 158 |
3,628 2,449 6,027 2,204 1,080 532 1,685 |
8.0 5.4 13.2 4.8 2.3 1.2 3.7 |
| 38.6 | ||||
| Omahola Project Total | 52.0 338 |
17,605 | ||
Notes: Figures have been rounded and totals may reflect small rounding errors. XRF chemical analysis unless annotated otherwise.
- eU3O8 - equivalent uranium grade as determined by downhole gamma logging. # Combined XRF Fusion Chemical Assays and eU3O8 values.
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Appendix 2 – Background Information on Ongolo Resource
RUN had early success from reconnaissance drilling for alaskite hosted uranium mineralisation in the project area located within ‘Alaskite Alley’ which hosts a number of uranium projects including Rio Tinto’s Rossing Uranium Mine and Extract Resources’ Husab Project, as well as others.
The high grade Ongolo Alaskite deposit (Figure 1) was discovered by RUN in April 2010, approximately 12 kilometres NE of its INCA deposit. A decision was taken in November 2010 to add the deposit to the Omahola Project and infill drilling to JORC Compliant standard commenced a month later. The detailed drill programme significantly increased the width of the mineralised zone to 600 metres in the central area, but importantly also demonstrated continuity along strike and on section as well as to depth. A maiden JORC Indicated and Inferred Mineral Resource estimate for the Deposit was completed by Coffey Mining Pty Ltd (Perth) and announced on 12 May 2011. The Resource totalled 6.9 Mt at 410 ppm for 6.2 Mlbs U3O8 at a 275 ppm cut-off (based on 2010 drill data).
The 2011 data has now been incorporated into the 2010 data giving a drillhole database for the estimation consisting of 342 RC and 18 diamond holes totalling 71,081 metres. The drillholes were typically drilled at 60° towards 135°. Only RC and diamond drilling and sampling undertaken by RUN were used in the estimate.
The RC samples are collected at 1m intervals in mineralised zones to obtain a 2-3kg final sample. Diamond core is quartered with samples taken every metre in mineralisation. Chemical assays are undertaken at Scientific Services in Cape Town, with Setpoint and Bureau Veritas in Johannesburg used for check assays. Downhole gamma data has been used where chemical assays were not available.
By count, approximately 20% of the composites used in the estimate were sourced from chemical data and 80% from factored radiometric assays. However, as the high-grade regions of the drilling were typically character assayed by chemical methods, approximately 65% of the resource metal endowment was sourced from chemical assay methods.
The method used to obtain estimated grades within the mineralised zones for U3O8 was block Multiple Indicator Kriging (MIK). A SMU of 5m x 5m x 3m was selected to simulate the anticipated mining selectivity. SMU corrections were applied to the estimate to report expected recoverable resources.
The deposit is still open along strike and down-dip in some areas. From regional geology it is believed that the uraniferous alaskites are within the Khan formation and mineralisation usually seems to be concentrated when these alaskites come into contact with the Rossing and Chuos formations, with a marble unit acting as an impermeable layer (Figure 2).
The new Ongolo Mineral Resource estimate is given in Table 1 in Appendix 3, which also includes a plan showing drillhole location and classification of the deposit (Figure 3). The information in this announcement which relates to the Resource is based on information compiled by Mr Doug Corley and Mr Neil Inwood. Mr Inwood is a Fellow of The Australasian Institute of Mining and Metallurgy and Mr Corley is a member of the AIG. Both Messrs Inwood and Corley are employed by Coffey Mining Pty Ltd.
Both Messrs Inwood and Corley have sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration and to the activity which was undertaken, to qualify as Competent Persons as defined in the 2004 Edition of the “Australasian Code for Reporting of Mineral Resources and Reserves”.
Dr Leon Pretorius from Reptile Uranium Namibia (“RUN”) is the competent person responsible for the drillhole database and assaying.
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Figure 2: Schematic Block Diagram INCA – Ongolo Area
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Appendix 3 – Ongolo Mineral Resource (Extract from Coffey’s Resource Statement)
Table 1 Ongolo Alaskite Uranium Project, Namibia November 2011 Resource Estimate
Reported at various cut-offs using bulk density coded by geology (averaging 2.66 t/m[3] )
Multiple-indicator Kriged estimate based on 2m U3O8 composites (chemical and factored radiometric)
Block dimensions of 40m NS by 40m EW by 6mRL
SMU corrections using a 5m x 5m 3m SMU block size
| Lower Cut |
Tonnes Above Cut-off(Mt) |
U3O8 (ppm) |
Contained U3O8 (M kg) |
Contained U3O8 (M lb) |
|---|---|---|---|---|
| Indicated | ||||
| 200 225 |
24.2 18.6 |
330 370 |
8.1 6.9 |
17.8 15.2 |
| 250 | 14.7 | 410 | 6.0 | 13.2 |
| 275 300 |
11.9 9.6 |
440 480 |
5.2 4.6 |
11.6 10.2 |
| Inferred | ||||
| 200 225 |
10.4 7.7 |
310 340 |
3.2 2.6 |
7.1 5.8 |
| 250 | 5.8 | 380 | 2.2 | 4.8 |
| 275 300 |
4.5 3.5 |
410 450 |
1.8 1.6 |
4.1 3.5 |
| Indicated and Inferred | ||||
| 200 225 |
34.6 26.3 |
330 360 |
11.3 9.5 |
24.9 21.0 |
| 250 | 20.5 | 400 | 8.2 | 18.0 |
| 275 300 |
16.4 13.1 |
430 470 |
7.1 6.2 |
15.6 13.6 |
| Note: Figures have been rounded |
Notes for the resource estimation include:
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The drillhole database in the vicinity of the estimation consists of some 416 drillholes (18 Diamond, and 342 RC drill holes) for a total of 71,081m. The drillholes were typically drilled at 60° towards 135°. Only RC and diamond drilling and sampling undertaken by RUN were used in the estimate.
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The RC samples are collected at 1m intervals in mineralised zones into a three tiered splitter to obtain a 2-3kg final sample. Diamond core is quartered with samples taken every metre in mineralisation. Chemical assays are undertaken at Scientific Services in Cape Town, with Setpoint and Bureau Veritas in Johannesburg used for check assays. Downhole gamma data has been used where chemical assays were not available.
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Coffey has not reviewed the QAQC in detail. RUN is the responsible entity for the assay database.
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Density data was collected from the diamond core utilising the water immersion method. The density was characterised by rock type and applied globally on a geological basis.
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A 3D wireframe model was created for the main marble units, and an indicator model was created to define the alaskite and granite lithologies in the study area.
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The Multiple Indicator Kriging (MIK) estimate was constrained to within a region defined by a 75ppm U3O8 indicator shell above a 25% probability
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The topographic surface, base of oxidation and overburden were coded into the model.
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The assay data was composited to 2m with statistical analyses on the 2m composites undertaken. Variography and search neighbourhood analysis were also conducted as input into grade estimation. A total of 11,044 2m composites were defined within the broad mineralisation halo that was used for the MIK estimate.
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By count, approximately 20% of the composites used in the estimate were sourced from chemical data and 80% from factored radiometric assays. However, as the high-grade regions of the drilling were typically character assayed by chemical methods, approximately 65% of the resource metal was sourced from chemical assay methods
-
The method used to obtain estimated grades within the mineralised zones for U3O8 was block Multiple Indicator Kriging (MIK). A SMU of 5m x 5m x 3m was selected to simulate the anticipated mining selectivity. SMU corrections were applied to the estimate to report expected recoverable resources.
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The deposit is still open along strike and down-dip in some areas.
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Resource classification was developed from the confidence levels of key criteria including drilling methods, geological understanding and interpretation, sampling, data density and location, grade estimation and the quality of the estimate.
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Infill drilling is recommended to increase the confidence of the mineralisation continuity in both the ‘Indicated and Inferred’ portions of the deposit.
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It is recommended that several holes throughout the deposit are completely assayed by chemical methods to allow for a further disequilibrium studies.
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Figure 3
Ongolo Uranium Project – November 2011 Resource Update
Drillhole Location and Classification
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Appendix 4: JORC Mineral Resource Estimates Summary – November 2011
| Cut-off (ppm U3O8) Tonnes (M) U3O8 (ppm) U3O8 (t) U3O8 (Mlb) |
|
|---|---|
| Deposit Category |
|
| REPTILE URANIUM NAMIBIA(NAMIBIA) | |
| Omahola Project INCA Indicated INCA Inferred Ongolo# Indicated Ongolo # Inferred MS7 # Inferred Tubas Red Sand Measured/Indicated Tubas Red Sand Inferred |
250 9.4 385 3,628 8.0 250 5.5 445 2,449 5.4 250 14.7 410 6,027 13.2 250 5.8 380 2,204 4.8 300 2.7 400 1,080 2.3 100 3.2 168 532 1.2 100 10.7 158 1,685 3.7 |
| Omahola Project Total | 52.0 338 17,605 38.6 |
| Tubas-Tumas Palaeochannel Project Tumas Indicated Tumas Inferred Tubas Inferred |
200 14.4 366 5,270 11.6 200 0.4 360 144 0.3 100 77.3 228 17,612 38.9 |
| Tubas-Tumas Project Total | 92.1 250 23,026 50.8 |
| Aussinanis Project Aussinanis Indicated Aussinanis Inferred |
150 5.6 222 1,243 2.7 150 29 240 6,960 15.3 |
| Aussinanis Project Total | 34.6 237 8,203 18 |
| 178.7 273 48,834 107.4 |
|
| RUN TOTAL – NAMIBIA | |
| NAPPERBY PROJECT(NT, AUSTRALIA) | |
| Napperby Inferred |
200 9.3 359 3,351 7.4 |
| NAPPERBY TOTAL | 9.3 359 3,351 7.4 |
| MOUNT ISA PROJECT(QLD, AUSTRALIA) | |
| Mount Isa Indicated 300 2.2 470 1,050 2.31 Mount Isa Inferred 300 2.5 450 1,120 2.48 |
|
| MOUNT ISA TOTAL 4.7 460 2,170 4.8 |
|
| TOTAL INDICATED RESOURCES 49.5 358 17,750 39.01 TOTAL INFERRED RESOURCES 143.2 256 36,605 80.58 |
|
| TOTAL RESOURCES 192.7 282 54,355 119.6 |
|
Notes: Figures have been rounded and totals may reflect small rounding errors.
XRF chemical analysis unless annotated otherwise.
eU3O8 - equivalent uranium grade as determined by downhole gamma logging.
Combined XRF Fusion Chemical Assays and eU3O8 values.
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Compliance Statements:
Namibia
The information in this report that relates to Exploration Results, Mineral Resources or Ore Reserves is based on information compiled by Dr Leon Pretorius, a Fellow of the Australasian Institute of Mining and Metallurgy. Dr Pretorius, Managing Director of Reptile Uranium Namibia (Pty) Ltd 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 as defined in the 2004 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’. Dr Pretorius consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.
The information in this report that relates to the MS7 Mineral Resource is based on work completed by Mr Neil Inwood; for the INCA Mineral Resource on work completed by Mr Neil Inwood and Mr Steve Le Brun – Mr Inwood will supply consent for the Inca Resource; and for the Ongolo Mineral Resource on work completed by Mr Neil Inwood and Mr Doug Corley. Mr Inwood is a Fellow of the Australasian Institute of Mining and Metallurgy and Mr Corley is a member of the Australian Institute of Geoscientists. Messrs Inwood and Corley have sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration and to the activity which they are undertaking to qualify as a Competent Persons as defined in the 2004 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’. Messrs Inwood and Corley consent to the inclusion in the report of the matters based on his information in the form and context in which it appears. Messrs Inwood and Corley are full-time employees of Coffey Mining.
The information in this report that relates to the Aussinanis and Tumas Mineral Resources is based on work completed by Mr Jonathon Abbott who is a full time employee of Hellman and Schofield Pty Ltd and a Member of the Australasian Institute of Mining and Metallurgy. Mr Abbott 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 as defined in the 2004 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’ and as a Qualified Person as defined in the AIM Rules. Mr Abbott consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.
The information in this report that relates to the Tubas Red Sand Mineral Resource is based on information compiled by Mr Mike Hall, who is a Member of The Australasian Institute of Mining and Metallurgy. Mr Hall is Consulting Geologist Resources with the MSA Group 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 as defined in the 2004 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’. Mr Hall consents to the inclusion in the report of the matters based on his information in the form and context in which it appears. Information in this report has also been verified by Mr Mike Venter, who is a member of the South African Council for Natural and Scientific Professions (SACNASP), a ‘Recognised Overseas Professional Organization’ (ROPO). Mr Venter is Regional Consulting Geologist, with The MSA Group 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 as defined in the 2004 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’. Mr Venter has visited the project sites to review drilling, sampling and other aspects of the work relevant to this announcement. Mr Venter consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.
The information in this report that relates to the Tubas Mineral Resource is based on information compiled by Mr Willem H. Kotzé Pr.Sci.Nat MSAIMM. Mr Kotzé is a Member and Professional Geoscientist Consultant of Geomine Consulting Namibia CC. Mr Kotzé 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 as defined in the 2004 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’. Mr Kotzé consents to the inclusion in this release of the matters based on his information in the form and context in which it appears.
Queensland
The information in this report that relates to Exploration Results, Mineral Resources or Ore Reserves is based on information compiled by Mr Martin Kavanagh, a Fellow of The Australasian Institute of Mining and Metallurgy. Mr Kavanagh is an Executive Director of Deep Yellow Limited 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 as defined in the 2004 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’. Mr Kavanagh consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.
The information in this report that relates to the Queensland Mineral Resource is based on information compiled by Mr Neil Inwood. Mr Inwood is a Member of The Australasian Institute of Mining and Metallurgy. Mr Inwood is employed by Coffey Mining Pty Ltd 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 as defined in the 2004 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’. Mr Inwood consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.
Northern Territory
The information in this report that relates to the Napperby Project Mineral Resource is based on information compiled by Mr Daniel Guibal who is a Fellow (CP) of the Australasian Institute of Mining and Metallurgy. Mr Guibal is a full time employee of SRK Consulting 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 as defined in the 2004 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’. Mr Guibal consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.
Where eU3O8 values are reported it relates to values attained from radiometrically logging boreholes with Auslog equipment using an A675 slimline gamma ray tool. All probes are calibrated either at the Pelindaba Calibration facility in South Africa or at the Adelaide Calibration facility in South Australia.
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