This just in re: Diablillos
www2.cdn-news.com
APRIL 5, 2000
Pacific Rim Mining Corp. Announces Diablillos Diamond
Drilling Results
VANCOUVER, BRITISH COLUMBIA--Pacific Rim Mining Corp. is pleased
to announce the receipt of results from a diamond drilling program
conducted at the Diablillos Project, Salta, Argentina. The
drilling was conducted under the supervision of Barrick Gold
Corporation in August, 1999.
The core drilling was designed to investigate the silver
mineralogy and to twin previously drilled reverse circulation (RC)
holes to investigate the potential loss of silver in the RC
drilling fluids by dissolution. A portion of the silver
mineralization at Diablillos is contained in water-soluble salts
and the possibility that these salts were dissolved and silver was
lost in the RC drilling fluids was tested by core drilling. The
core drilling program totalled 1,330 meters in five drill holes
and the results are presented in the following table.
/T/
Hole No. From To Thickness Average Average
Silver Gold Grade
Grade (g/t Au)
(g/t Ag)
------------------------------------------------------------------
DDH-99-17 13.00 20.20 7.20 34.2 0.01
102.65 205.02 102.37 174.5 1.05
DDH-99-18 67.71 75.00 7.29 47.5 0.05
102.60 230.50 127.90 119.9 1.45
DDH-99-19 58.25 69.80 11.55 6.7 0.42
DDH-99-20 146.70 160.58 13.88 16.2 0.84
209.40 214.70 5.30 12.9 1.16
281.80 305.75 23.95 8.1 0.81
358.00 363.00 5.00 4.4 0.46
DDH-99-21 112.00 172.71 60.71 199.4 0.05
/T/
There is no conclusive evidence that the silver salts have been
dissolved, resulting in the underestimation of silver grades in
the RC drilling. Although the number of twinned holes is not
conclusive, they demonstrate that assay intervals can be higher in
either the RC or the diamond drilling, or in neither, in a given
twin set.
Barrick Gold Corporation holds a 70% interest in the Diablillos
project and to retain this interest must make a production
decision by June 2000, or make exploration expenditures of US$ 4
million annually after June 2000 until a production decision is
reached.
On behalf of the board of directors,
Thomas C. Shrake, CEO |
