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EVOLUTION MINING LIMITED — Regulatory Filings 2003
Dec 21, 2003
64885_rns_2003-12-21_2908372b-c135-48ab-ad99-904658fc94e2.pdf
Regulatory Filings
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22 December 2003
ASX RELEASE
BIG PIT INITIATIVE COMPLETION ASSAY RESULTS AND DISCUSSION
SUMMARY
Westonia Mines Limited releases the final batch of assay data from its recently completed Big Pit Initiative drilling programme.
Best new results are:
| WDD 108 | 166-188m | 22m @ 12.6 g/t * |
|---|---|---|
| WDD 111 | 232-242m | 10m @ 2.9 g/t |
| WDD 114 | 24-42m | 18m @ 2.7 g/t ** |
| WDD 123 | 174-186m | 12 $m @ 2.7 g/t$ |
| WDD 141 | 116-148m | 32m @ 2.1 g/t |
| WDD 143 | 228-238m | 10 $m @ 2.0 g/t$ |
| WDD 143 | 256-276m | $20m$ $@$ 6.0 g/t |
- * Previously quoted as 10.8 g/t
- ** Supergene mineralisation
- The drill data from this successful programme has been passed to independent consultants who will produce a new estimate of global resources and, from that an optimised pit design and new estimated mineable resource therein.
ė $\bullet$
BIG PIT INITIATIVE RATIONALE AND LOGISTICS
The recent acquisition of the Big Bell mill will enable a 2.5Mtpa treatment rate of Westonia ore. That accelerated rate brought forward the plan to undertake further drilling below the Base Case pit which the Company was using for completion of its bankable feasibility study ("BFS"), so as to determine potential for increased project longevity. At depth beyond that pit, the Company's drill database indicated a general continuity of mineralisation which has been used previously to estimate resources, but the drill density was insufficient for estimation of mineable resources.
The Initiative drilling comprised a 43 hole, 10,800 m programme using a combination of diamond and reverse circulation drilling techniques.
DRILL RESULTS
All gold assay results are presented in the accompanying Table. It presents data previously released on 12th and 24th November and 9th December and all new data subsequently received.
Figure 1 shows the hole numbers and the approximate positions of the middle intersection of the target Edna May Gneiss for each hole. Figures 2 to 4 are sections which present the more significant gold intersections in the drill holes. Note that there are now some minor discrepancies between the values shown in the Table and the previously drafted sections.
Notes:
- a) All assays are preliminary. Assaying is by a partial extraction technique and a small upwards correction of around 5% will generally be applied in due course.
- b) No cutting has been employed.
- c) All holes are vertical or inclined towards grid southeast.
- d) True widths will vary between 70% and 90% of downhole width.
- e) Drill intersections denoted by an asterisks (*) are of supergene mineralisation within the otherwise normally barren Hangingwall Ultramafics. The supergene mineralisation appears to be significantly more widespread than had previously been identified and thus has the potential to add oxide ounces to the Company's mineable resource base. This area had previously reported as waste within the optimized pit designs.
- f) NSA denotes no significant gold assay intersected in that hole.
RESOURCE & ESTIMATES
The drill data has been passed to independent resource estimate consultants, Hellman and Schofield Pty Ltd. They will estimate a new global resource at Westonia. That study will provide the basis for modeling of a production pit and contained mineable resource.
The Company cannot as yet give a quantative indication of the likely increase in resources. However, the general continuity of the mineralization which has been drilled to date allows confidence that there will be a significant increase in the estimate of the mineable resource. This implies improved project longevity and economics.
The studies are anticipated to be completed during January and the BFS finalized during February.
| Previously Reported | Newly Reported | |||||||
|---|---|---|---|---|---|---|---|---|
| Hole No | From (m) |
To $(m)$ | Width (m) |
Grade (g/t) | From $(m)$ | $\overline{\text{To (m)}}$ | Width $(m)$ | Grade (g/t) |
| WDD 101 | 176 | 196 | $\overline{20}$ | 1.2 | ||||
| 254 | 262 | 8 | 1.2 | |||||
| WDD 102 | 184 | 194 | $\overline{10}$ | 1.7 | ||||
| 239 | 251 | $\overline{12}$ | 1.3 | |||||
| WDD 103 | 192 | 206 | 14 | 1.2 | ||||
| WDD 104 | 224 150 |
240 220 |
$\overline{16}$ 70 |
1.5 3.2 |
||||
| WDD 105 | 314 | 318 | 4 | 5.1 | ||||
| WDD 106 | 306 | 312 | $\overline{6}$ | 1.3 | ||||
| WDD 107 | $\overline{6}$ | 18 | 12 | $0.8*$ | ||||
| 168 | 174 | 6 | 1.3 | |||||
| 186 | 200 | 14 | 1.2 | |||||
| 268 | 284 | $\overline{16}$ | 2.9 | |||||
| 306 | 308 | $\overline{2}$ | 19.9 | |||||
| WDD 108 | 86 | 88 | $\overline{2}$ | 4.6 | ||||
| 110 | 120 | 10 | 0.7 | |||||
| 166 | 188 | $\overline{22}$ | 10.8 | 166 | 188 | $\overline{22}$ | 12.6 | |
| 196 214 |
208 224 |
$\overline{12}$ 10 |
0.7 1.4 |
|||||
| 236 | 240 | 4 | 3.2 | |||||
| WDD 109 | 48 | 66 | 18 | $1.8*$ | ||||
| 158 | 168 | $\overline{10}$ | 6.0 | |||||
| 182 | 242 | 60 | 2.9 | |||||
| WDD 110 | 132 | 140 | $\overline{8}$ | 1.1 | ||||
| 148 | 168 | $\overline{20}$ | 0.9 | |||||
| 196 | 204 | $\overline{8}$ | 1.4 | |||||
| WDD 111 | 64 | 68 | $\overline{4}$ | $1.6*$ | ||||
| 136 | 146 | 10 | 1.4 | |||||
| 186 | 202 | $\overline{16}$ | 6.4 | |||||
| WDD 112 | 230 | 234 | $\overline{4}$ | 3.5 | 232 | $\overline{242}$ | 10 | 2.9 |
| WDD 113 | 150 | 162 | $\overline{12}$ | $\overline{1.2}$ | ||||
| 198 | 214 | $\overline{16}$ | 4.0 | |||||
| WDD 114 | 24 | 42 | 18 | $2.7*$ | ||||
| 249 | 261 | 12 | 1.1 | |||||
| WDD 115 | 124 | 132 | $\overline{8}$ | 1.2 | ||||
| 180 | 188 | $\overline{8}$ | 2.2 | |||||
| WDD 116 | 118 | 140 | $\overline{22}$ | 0.8 | ||||
| 198 | 214 | 16 | 1.1 | |||||
| WDD 117 | 148 | 156 | $\overline{\mathbf{8}}$ | 5.5 | ||||
| 196 | 214 | $\overline{18}$ | 2.0 | |||||
| 248 278 |
260 286 |
$\overline{12}$ 8 |
0.9 0.9 |
|||||
| 298 | 300 | $\overline{2}$ | 3.5 | |||||
| WDD 118 | 215 | 243 | 28 | $\overline{2.2}$ | ||||
| WDD 119 | 128 | 149.9 | 21.9 | 1.5 | ||||
| 194 | 202 | $\overline{8}$ | 1.8 | |||||
| WDD 120 | 136 | 166 | 30 | 0.9 | ||||
| 186 | 200 | 14 | 0.9 | |||||
| WDD 121 | NSA | |||||||
| WDD 122 | 96 | 102 | 6 | 1.3 | ||||
| 150 | 156 | 6 | 1.1 |
| Previously Reported | Newly Reported | |||||||
|---|---|---|---|---|---|---|---|---|
| Hole No | From (m) |
$\overline{\text{To}}$ (m) | Width (m) |
Grade (g/t) | From (m) | $\overline{\text{To}}$ (m) | Width (m) | Grade (g/t) |
| 196 | 211 | $\overline{15}$ | 1.5 | |||||
| WDD 123 | 114 | 122 | $\overline{8}$ | 1.6 | ||||
| 140 | 144 | $\overline{4}$ | 1.7 | |||||
| WDD 124 | 174 102 |
186 108 |
$\overline{12}$ 6 |
2.7 | ||||
| WDD 125 | 191 | 209 | 18 | 1.5 | 3.3 | |||
| 145 | 149 | 4 | 1.4 | |||||
| WDD 126 | NSA | |||||||
| WDD 127 | 42 | 48 | $6\overline{6}$ | $1.0*$ | ||||
| 204 | 210 | $\overline{6}$ | 1.2 | |||||
| $\overline{244}$ | 246 | $\overline{2}$ | 3.7 | |||||
| WDD 128 | 36 | 42 | $\overline{6}$ | $1.8*$ | ||||
| 54 | 60 | $\overline{6}$ | $1.1*$ | |||||
| 176 | 178 | $\overline{2}$ | 5.8 | |||||
| 202 266 |
212 270 |
$\overline{10}$ 4 |
1.0 2.5 |
|||||
| 304 | 312 | $\overline{\mathbf{8}}$ | 8.9 | |||||
| WDD 129 | 201 | $\overline{203}$ | $\overline{2}$ | 2.8 | ||||
| 221 | 231 | 10 | 1.1 | |||||
| WDD 130 | 78 | 90 | $\overline{12}$ | $\overline{1.2}$ | ||||
| 164 | 174 | 10 | 1.0 | |||||
| $\overline{212}$ | $\overline{214}$ | $\overline{2}$ | 5.2 | |||||
| WDD 131 | $\overline{18}$ | 24 | $\overline{6}$ | $1.5*$ | ||||
| 96 | 102 | $\overline{6}$ | 3.1 | |||||
| 142 | 154 | $\overline{12}$ | 1.0 | |||||
| 162 | 172 | $\overline{10}$ | 7.4 | |||||
| 200 | 206 | 6 | 2.7 | |||||
| WDD 132 | 148 | 164 | 16 | 1.1 | ||||
| 174 | 210 | $\overline{36}$ | 3.0 | |||||
| WDD 133 | $\overline{24}$ | 36 | $\overline{12}$ | $1.4*$ | ||||
| 60 | 66 | 6 | $1.1*$ | |||||
| 162 | 228 | 66 | 4.1 | |||||
| WDD 134 | NSA | |||||||
| WDD 135 | 224 | 275 | 53 | 1.0 | ||||
| WDD 136 | 74 | 86 | 12 | 3.6 | ||||
| 96 | 106 | 10 | 1.1 | |||||
| 114 | 124 | 10 | 1.6 | |||||
| 142 | 156 | $\overline{14}$ | 1.3 | |||||
| 172 | 174 | $\overline{2}$ | 3.2 | |||||
| WDD 137 | 58 | 64 | $\overline{6}$ | $2.0*$ | 36 | 60 | $\overline{24}$ | $1.4*$ |
| 76 | 80 | 4 | 2.4 | |||||
| 90 | 114 | 24 | 3.5 | |||||
| 142 | 150 | 8 | 0.9 | |||||
| 166 | 174 | $\overline{8}$ | 0.9 | |||||
| WDD 138 | 34 | 48 | 14 | $1.4*$ | ||||
| 207 | 221 | 14 | 2.9 | |||||
| 247 | 265 | 18 | 2.0 | |||||
| WDD 139 | NSA | |||||||
| WDD 140 | 126 | 146 | 20 | 1.4 | ||||
| 176 194 |
188 206 |
12 $\overline{12}$ |
1.4 1.7 |
|||||
| Previously Reported | Newly Reported | |||||||
|---|---|---|---|---|---|---|---|---|
| Hole No | From (m) |
To(m) | Width (m) |
Grade (g/t) | From (m) | To $(m)$ | $W$ idth $(m)$ | Grade (g/t) |
| WDD 141 | 84 | 88 | 4 | 1.6 | ||||
| 116 | 148 | 32 | 2.1 | |||||
| WDD 142 | NSA | |||||||
| WDD 143 | 190 | 196 | 6 | 1.0 | ||||
| 214 | 220 | 6 | 1.1 | |||||
| 228 | 238 | 10 | 2.0 | |||||
| 256 | 276 | 20 | 6.0 |
Å
Andrew Drummond Managing Director
Enquiries should be directed to the Managing Director and readers are encouraged to register on the Company's website (www.westoniamines.com.au) for automatic receipt of information.
Competent Person Declaration
The information on mineralisation in this report accurately reflects information prepared by competent persons (as defined by the Australasian Code of Reporting of Identified Mineral Resources and Ore Reserves). It is compiled by A.J. Drummond, an employee of the Company who is a Fellow of The Australasian Institute of Mining and Metallurgy with the requisite experience in the field of activity in which he is reporting.



