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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.