Guyana Goldfields Inc.
TSX : GUY

Guyana Goldfields Inc.

April 25, 2008 08:00 ET

Guyana Goldfields: Aurora Exploration Update

TORONTO, ONTARIO--(Marketwire - April 25, 2008) - Guyana Goldfields Inc. (TSX:GUY), is pleased to provide an update of its exploration activities at the 100% owned Aurora property, Guyana. Results reported in the release include diamond drilling results from both shallow and deep drill holes in the Rory's Knoll area as well as trenching and drilling results from the Central Zone. A complete table of results incorporating thirteen drill holes and thirty trenches is attached to this release.

Rory's Knoll

Diamond drilling continues to confirm and define significant gold mineralization in the Rory's Knoll resource. High grade gold mineralization was encountered in both deep and shallow drill holes within broader zones of disseminated gold mineralization. For instance, drill hole RKD 101, intersected 190 metres averaging 5.24 g/t Au, including 25 metres of 17.07 g/t. Drill hole RKD 103 which targeted much deeper areas between 500 and 700 metres below surface, intersected 80 metres averaging 7.7 g/t Au. These results, as well as those from approximately 30,000 metres of additional drilling, will be incorporated into a new resource calculation scheduled for the third quarter 2008.

Central Zone

The Company is presently focusing on defining additional resources in the Central Zone. This area is approximately 500 metres wide and 1000 metres long and lies between the Rory's Knoll and Alex Hill resources. In the southern sector it includes the Mad Kiss, West Mad Kiss and Walcott Hill zones and to the north, the North Aleck Hill districts. Additional trenching and drilling in these areas has continued to reveal significant widespread gold mineralization. Drill Hole NAHD 15 at North Aleck Hill intersected 7 metres (5.36 m True Width) @ 3.72 g/t Au, 16 metres (12.25 m True Width) @ 1.29 g/t Au and 10 metres (7.7 m True Width) of 2.85 g/t Au. Additional trenching in the Northern Zone has also expanded gold mineralization to the south and west, with trench NAHT 15 returning 16metres (13.6 m True Width) @ 7.35 g/t Au and 16metres (13.6 m True Width) @ 3.28 g/t Au. In the southern sector trenching and drilling has also expanded existing gold zones and has led to the discovery of parallel mineralized structures. Hole WMKD 19 returned 6metres (5.10 True Width) of 3.65 g/t Au and 18metres (15.30 True Width) @ 3.88 g/t Au while trench WMKT 8 expanded at surface gold mineralization to the south by returning 19metres (18.01 True Width) @ 6.77 g/t Au, including 5 metres (4.76 True Width) grading 23.65 g/t Au. Approximately 200 metres north of this area trench WHT-6 returned 10.7 metres (9.96 True Width) grading 4.67 g/t Au.

The Company has experienced considerable delays in the receipt of assays from the laboratory. Currently, results from 18 holes are pending from the lab from the Central Zone. Results from this area will be incorporated into the new resource estimate.

Management believes the highly encouraging results for the Central Zone may lead to a significant increase in the resources at the Aurora Property.

The Aurora exploration, drilling and trenching program is being carried out under the direction of Mr. Niel Silvio, a qualified person within the meaning of National Instrument 43-101. Sample blanks, duplicates and recognized standards were inserted into the sample stream at regular intervals. The Company is utilizing the services of Loring Laboratories; a Canadian owned and operated facility located in Georgetown, Guyana. Mr. Silvio has reviewed the exploration results contained in this news release.

About Guyana Goldfields:

Guyana Goldfields Inc is a Canadian based mineral exploration Company primarily focused on the exploration and development of gold deposits in the Guiana Shield of South America. The Guiana Shield is in the northern part of the Amazon Craton and covers parts of Guyana, Venezuela, Suriname, French Guyana and northern Brazil.

The Company holds advanced exploration projects in various stages of development and has been operating in Guyana continuously since 1996.

The Company currently has approximately (CDN) $17 million in cash and no debt.

Additional Information:

Information is available on the Company's website at www.guygold.com and on www.sedar.com.



Drilling Results

Rorys Knoll
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Grid Coordinates Grid Dip Drill Intercept
------------------ Azimuth (degrees) (metres) Grade
Northing Easting(degrees) --------------------- (g/t Au)
Hole # From To Width
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RKD-101 10025 10894 270 -73 129 144 15.00 2.83
including 133 135 2.00 16.13
165 183 18.00 1.24
204 216 12.00 1.11
249 270 21.00 1.82
including 255 258 3.00 6.86
284 474 190.00 5.24
3.95
(cut to 25 g/t Au)
including 298 308 10.00 6.54
including 330 362 32.00 5.88
including 384 392 8.00 6.03
including 406 431 25.00 17.07
7.23
(cut to 25 g/t Au)
including 447 461 14.00 6.40

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RKD-102 9999 10899 256 -68 69 75 6.00 1.78
110 118 8.00 4.12
including 112 118 6.00 5.10
178 381 203.00 2.25
2.23
(cut to 25 g/t Au)
including 184 186 2.00 7.37
including 202 206 4.00 4.82
including 253 273 20.00 6.60
6.42
(cut to 25 g/t Au)
including 283 285 2.00 7.00
including 303 307 4.00 5.18
including 331 341 10.00 4.93

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RKD-103 10000 10950 310 -78 598 619.7 21.70 4.73
including 600 610 10.00 7.67
665 904 239.00 3.49
3.11
(cut to 25 g/t Au)
including 701 813 112.00 6.12
5.30
(cut to 25 g/t Au)
including 701 781 80.00 7.70
6.28
(cut to 25 g/t Au)
including 739 781 42.00 9.11
6.94
(cut to 25 g/t Au)
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RKD-104 10050 10950 301 -82 747 876 129.00 2.20
1.83
(cut to 25 g/t Au)
including 779 813 34.00 5.92
4.49
(cut to 25 g/t Au)
including 791 801 10.00 12.68
7.83
(cut to 25 g/t Au)
including 825 827 2.00 6.67

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RKD-105 9999 10899 260 -55 138 283 145.00 3.20
2.87
(cut to 25 g/t Au)
138 147.5 9.50 15.70
10.72
(cut to 25 g/t Au)
203 207 4.00 5.48
235 239 4.00 6.32
259 261 2.00 6.64

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RKD-106 10025 10895 270 -80 141.5 158 16.50 2.03
including 147.5 152 4.50 4.72
165.5 178.7 13.20 2.78
including 165.5 168.5 3.00 6.05
240.4 270 29.60 5.60
including 243 249 6.00 7.75
including 262.5 270 7.50 14.37
301 311.5 10.50 5.64
including 301 308.5 7.50 7.54
378.05 637 258.95 1.59
including 414 424 10.00 9.94
including 502 506 4.00 4.50
including 553 561 8.00 5.18
including 607 613 6.00 5.35

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RKD-107 10026 10875 260 -55 130 285.5 155.50 2.99
2.56
(cut to 25 g/t Au)
including 131.5 147 15.50 11.67
7.33
(cut to 25 g/t Au)
including 163 169 6.00 5.10
including 195 207 12.00 5.39
including 263 267 4.00 5.27

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RKD-109 10024 10874 250 -45 64 67.15 3.15 1.93
106 171.5 65.50 1.09
including 124 130 6.00 4.87

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Central Zone South Width/
True
Width
WMKD-19 9939 9935 90 -64 0 6 6/5.10 3.65
125 143 18/15.30 3.88

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Central Zone North
NAHD-15 10571 10109 231 -50 5.00 12.00 7/5.36 3.72
88.00 104.00 16/12.25 1.29
108.00 109.00 1/0.77 2.32
117.00 118.00 1/0.77 1.37
150.00 160.00 10/7.70 2.85
including 158.00 160.00 2/1.53 11.45
172.00 174.00 2/1.53 1.37

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NAHD-16 10602 10137 258 -60 31.00 32.00 1/0.87 1.03
60.00 73.00 13/11.25 1.99
including 69.00 72.00 3/2.60 4.96
120.00 125.00 5/4.30 3.36
211.00 214.00 3/2.60 2.26
251.00 268.00 17/14.7 1.49
including 264.00 266.00 2/1.73 6.70

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NAHD-17 10451 10166 270 -45 223.00 237.00 14/3.61 3.61
including 223.00 226.00 3/2.69 14.00

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NAHD-19 10539 9927 90 -45 52.00 57.00 5/1.10 1.10
104.00 138.00 34/24 1.04
including 132.00 134.00 2/5.04 5.04
171.00 174.00 3/2.69 2.69

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Trenching Results
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Intercept (metres)
Grid ------------------------
Trench # Coordinates Grid Width/
North- East- Azimuth True Grade
ing ing (degrees) From To Width (g/t Au)
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Central Zone South

WMKT-1AS 9952 10073 271 44.00 47.00 3/2.87 24.51
10.17
(cut to 25 g/t Au)
including 44.00 45.00 1/0.96 68.03
25.00
(cut to 25 g/t Au)


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WMKT-2 10112 10100 35 30.00 36.00 6/5.59 1.14
including 42.00 45.00 3/2.80 0.93
including 59.50 61.50 2/1.86 1.17

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WMKT-2S 10111 10101 35 29.00 37.00 8/7.45 3.04
including 31.00 33.00 2/1.86 9.90
including 44.00 46.00 2/1.86 1.18

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WMKT-3S 10206 10201 156 50.00 83.00 33/30.0 1.22
including 81.00 83.00 2/1.86 4.30

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WMKT-4S 10103 10209 311 13.00 23.00 10/5.73 1.09
including 16.00 17.00 1/0.50 4.40

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WMKT-6 10138 10194 215 40.00 44.00 4/3.20 3.09
including 42.00 43.00 1/0.50 7.07

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WMKT-8 9903 10104 273 54.00 57.00 3/2.86 2.00
including 98.00 117.00 19/18.01 6.77
6.48
(cut to 25 g/t Au)
including 99.00 104.00 5/4.76 23.65
22.57
(cut to 25 g/t Au)

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WMKT-9 9970 10007 90 29.00 33.00 4/3.81 2.55
including 30.00 31.00 1/0.95 6.53

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WMKT-11 10131 10222 41 4.00 6.00 2/1.95 1.36
including 50.00 53.00 3/2.92 2.08
including 64.00 67.00 3/2.92 1.02

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WHT-1 10023 10297 94 22.00 26.00 4/2.72 1.06
including 33.00 35.00 2/1.34 8.37
including 33.00 34.00 1/0.68 15.53
including 54.00 57.00 3/2.04 2.51
including 97.00 99.00 2/1.99 1.18

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WHT-2 10070 10288 90 0.00 12.00 12/9.91 1.45
including 1.00 3.00 2/1.65 4.43
including 64.00 66.00 2/1.43 1.01
including 77.00 79.00 2/1.41 1.29
including 98.00 123.00 25/23.80 1.69

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WHT-2XS 10069 10293 270 5.00 8.00 3/2.48 1.43

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WHT-5 10289 10343 217 18.00 23.00 5/4.40 1.66
including 18.00 19.00 1/0.88 6.40

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WHT-6 10114 10364 266 15.00 25.70 10.7/9.96 4.67
4.36
(cut to 25 g/t Au)
including 17.00 20.00 3/2.79 14.08
12.98
(cut to 25 g/t Au)

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WHT-6S 10113 10364 266 19.00 21.00 2/1.86 9.10

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WHT-7 10113 10368 79 37.00 39.00 2/1.79 3.07

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WHT-8 10088 10378 91 21.00 23.00 2/1.96 6.39
including 22.00 23.00 1/0.98 11.87

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WHT-8S 10086 10378 91 13.00 16.00 3/2.94 1.80
including 21.00 23.00 2/1.96 2.15

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Central Zone North

NAHT-6 10683 9998 77 114.00 116.00 2/1.70 1.17

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NAHT-7A 10366 9993 90 23.00 25.00 2/1.70 1.93
including 28.00 30.00 2/1.70 1.30

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NAHT-8 10283 9933 90 25.00 26.00 1/0.87 1.43

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NAHT-9 10239 9942 113 68.00 88.00 20/17 0.55

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NAHT-10 10189 10010 82 37.00 41.00 4/3.40 6.54

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NAHT-11A 10403 9707 98 0.00 30.00 30/25.50 2.09
including 9.00 12.00 3/2.55 5.52
including 26.00 30.00 4/3.40 6.79

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NAHT-11 10403 9704 270 10.00 11.00 1/0.85 4.33
including 22.00 28.00 6/5.10 8.60
including 22.00 25.00 3/2.55 16.43

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NAHT-12 10375 9706 110 3.00 4.00 1/0.85 1.00
including 21.00 27.00 6/5.10 1.52
including 71.00 82.00 11/9.35 4.41
3.99
(cut to 25 g/t Au)
including 80.00 82.00 2/1.70 23.19
20.90
(cut to 25 g/t Au)

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NAHT-14 10410 9994 92 68.00 70.00 2/1.70 2.62

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NAHT-15 10325 9981 84 59.00 75.00 16/13.60 7.35
including 61.00 67.00 6/5.10 11.70
including 89.00 105.00 16/13.60 3.28
including 71.00 75.00 4/3.40 9.82
including 101.00 105.00 4/3.40 6.80

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NAHT-16 10491 9564 91 48.00 51.00 3/2.55 1.53

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NAHT-16A 10486 9641 92 8.00 10.00 2/1.70 10.03

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