pre-open, page-2

re: pre-open/announcement YAMARNA GOLDFIELDS LIMITED
ABN 84 006 189 331
13 November 2003
COMPANY ANNOUNCEMENT
The Company is pleased to provide the following information received from Cangold Limited today.
Drilling Confirms Bulk -Tonnage Silver-Gold Discovery at Thorn Project, BC
Vancouver, BC – November 12, 2003: Rimfire Minerals Corporation and CANGOLD LIMITED are
pleased to release the results from the remaining holes of the 2003 drilling program at the Thorn property,
northwest British Columbia. The wide silver-gold zone discovered in hole THN03-19 (released October 27,
2003, PR03-12), has been confirmed and expanded along strike and down dip by four additional holes.
The program consisted of eight holes, totaling 874.5 m (2869 feet), designed to test the core of a very
strong, 100 metre x 300 metre multi -element soil geochemical anomaly adjacent to a few small mineralized
outcrops. As seen in drill core, the mineralization occurs as a core of higher grade material, roughly 20-25
metres wide within a lower grade envelope, which appears to have an overall width of about 60 metres and
dips 65-75° to the southwest.
The mineralized zone was intersected 20 and 95 metres down dip of THN03-19 in holes THN03-21 and 22,
respectively. THN03 -21 was drilled at –45° to the northeas t, cutting 40.7 metres of 118.8 g/t Ag and 0.83
g/t Au, including 25.2 metres of 173.1 g/t Ag and 1.2 g/t Au. THN03-22 was a vertical hole drilled from
the same location, intersecting an initial 30.6 metres of lower grade material prior to cutting 110.1 g/t Ag
and 0.68 g/t Au over the final 77.8 metres of the hole. This zone includes two higher grade intersections
separated by a 21 metre lower grade interval. The upper interval assayed 159.4 g/t Ag and 0.84 g/t Au
over 19.6 metres , while the lower zone as sayed 264.9 g/t Ag and 1.72 g/t Au over 7.1 metres. Hole
TH03-20 was drilled from the same collar location as TH03-19 but in the opposite direction. It appears to
have skirted the edge of the mineralized zone in a down-dip direction, intersecting 53.3 metres of 65.6 g/t
Ag and 0.31 g/t Au.
Hole THN03-23 was collared 25 metres northwest of holes THN03-21 and 22 to test the strike extension in
this direction. The continuity of the zone was confirmed by cutting 62.1 metres of 69.2 g/t Ag and 0.32 g/t
Au inc luding an 11.1 metre zone of 206.1 g/t Ag and 0.34 g/t Au. Holes THN03-16 (collared 85 metres
north of THN03 -23) and THN03-17, -18 (collared 170 metres northwest of THN03-23) intersected weakly
mineralized zones with elevated silver, gold, lead and zinc.
Significant Intersections:
Hole From (m) To (m) Width (m) Gold (g/t) Silver (g/t) Silver Equiv. (g/t)* Lead (%) Zinc (%)
THN03-191 6.1 44.7 38.6 1.22 103.2 188.0 0.6 0.7
including 6.1 20.1 14.0 1.97 190.0 328.0 1.3 0.8
THN03-20 3.1 56.4 53.3 0.31 65.6 87.2 0.1 0.2
including 3.1 14.1 11.0 0.63 101.0 145.4 0.2 0.1
THN03-21 4.8 45.5 40.7 0.83 118.8 176.6 0.9 1.0
including 20.3 45.5 25.2 1.20 173.1 257.2 1.5 1.5
THN03-22 9.6 40.2 30.6 0.16 61.6 72.7 0.1 0.3
and2 60.9 138.7 77.8 0.68 110.1 158.1 0.6 1.7
including 74.0 93.6 19.6 0.83 159.4 217.9 0.6 1.3
and 114.6 121.7 7.1 1.72 264.9 385.4 2.2 4.0
THN03-23 13.9 76.0 62.1 0.32 69.2 91.7 0.2 0.6
including 18.0 29.1 11.1 0.34 206.1 229.5 0.5 0.2
*a ratio of 70 g/t silver = 1 g/t gold was used in the equivalence calculations
1previously announced 2hole ended in mineralization
Mineralization is hosted by a heterolithic breccia with a matrix consisting of black rock flour and ~5%
pyrite with lesser sphalerite and boulangerite (lead-antimony sulphosalt). Higher grade silver-gold-leadzinc
mineralization is typically associated with zones of increased (~15%) sulphide/sulphosalt content,
commonly forming rims on breccia fragments.
Hole Collar Locations:
Hole Easting (m) Northing (m) Azim uth Dip Length (m)
THN03-16 628741 6492014 050° -45° 143.3
THN03-17 628673 6492069 210° -45° 123.4
THN03-18 628675 6492073 050° -45° 137.2
THN03-19 628799 6491939 050° -45° 79.2
THN03-20 628793 6491935 230° -50° 79.2
THN03-21 628775 6491913 230° -45° 73.2
THN03-22 628775 6491913 n/a -90° 138.7
THN03-23 628756 6491933 050° -45° 100.3
874.5
With these results the Oban Breccia is developing into a significant bulk-tonnage silver-gold-lead-zinc
target that remains open at depth and on strike to the northwest and southeast. While gold and silver
grades are remarkably consistent in the drill results, the bonanza silver grades collected in float and
outcrop samples imply that additional zones of high grade mineralization have yet to be discovered.
Mr. David Caulfield, P.Geo., President of Rimfire Minerals Corporation states: “The Oban discovery has
now been confirmed at depth and along strike to the northwest. Drilling further to northwest has not
explained the strongly anomalous silver and gold values found in soils, nor the high grades obtained from
rock sampling in that region. To the southeast we have very little data as glacial till blankets all outcrop
and renders soil sampling ineffective. There is great potential to further expand the Oban Breccia Zone in
both these directions.”
Mark Baknes, M.Sc., P.Geo., is the Qualified Person for the project, as defined by NI 43-101. All samples
were analyzed by ALS/Chemex Labs, of North Vancouver, BC. Equity Engineering Ltd. provided
geological expertise, and Falcon Diamond Drilling Ltd. provided diamond drilling services. Cross-sections
and a plan map of drill hole locations will be available at www.rimfireminerals.com and www.cangold.ca.
Rimfire and Cangold are in the second year of a three-year option agreement whereby Cangold can earn
a 51% interest in the Thorn by conducting $1.2 million in exploration over the period and by making
staged cash and share payments.
For And On Behalf Of The Board
Bryan J Frost
Executive Chairman