Eaglecrest Explorations Ltd.

Eaglecrest Explorations Ltd.

September 19, 2005 16:39 ET

Eaglecrest Explorations Ltd.: Diamond Drilling Connects Dilation Zones B and C with High Grade Gold Intersection

VANCOUVER, BRITISH COLUMBIA--(CCNMatthews - Sept. 19, 2005) - Eaglecrest Explorations Ltd. (TSX VENTURE:EEL)(FWB:EAT.FSE) is pleased to report Fire Assay (FA) results from the 2005 diamond drilling) in the Dona Amelia zone that covers an area of 40 square kilometres (km) within the Company's 298.84 square km San Simon project in northeast Bolivia.

Diamond drilling resumed in May 2005 with two drills. To date 4,035.4 metres (m) have been completed in 22 holes in the Trinidad area in the eastern part of the Dona Amelia zone. Drilling was divided between tracing the main quartz vein/structure (MQV) along strike down dip at depth (3,505.7 m in 12 holes) and pilot holes for the TD-1 decline adit (529.7 m in 6 holes). The on-site independent laboratory operated by Peruvian Analab S.R.L. has completed 469 FA on diamond drill core samples. Analab S.R.L. has also completed sampling tree work (20 repeated FA of samples with and without screening for metallics) on samples from the project that have established that the MQV is very nuggety (gold distribution is very erratic), and no amount of sub-sampling (drill core or trench sampling) will precisely determine the true grade of the MQV. Their findings substantiate the position that a large quantity of bulk sampling is required to determine the true grade of the MQV. The current underground program will bulk sample approximately 16,000 metric tonnes of MQV in order to determine the true grade of the MQV.

Ten holes completed to date intersected the MQV with true widths of up to 3.4 m and four holes were lost due to drilling problems prior to reaching the MQV target. Dilation zone C (Dilation zones A through C were described in previous news releases) was traced an additional 100 m to the west and is found to connect with Dilation zone B with holes TRD04-124 and TRD05-139 along section 598,150 E. Width of the MQV increases down dip from 2.1 m in TRD04-124 through 3.4 m in TRD05-139 to 15.9 m in TRD04-072. TRD04-124 returned a gold weighted average of 9.9 grams per tonne (g/t) over 2.0 m including 16.6 g/t over 1.2 m while TRD05-139 returned a gold weighted average of 1.6 g/t over 3.4 m including 3.1 g/t over 0.9 m.

Seven holes were completed in the western part of the Trinidad area to the south and southwest of the TD-1 decline with MQV intersections ranging from 0.2 to 3.0 m width returned gold grades up to 2.0 g/t. Dilation Zone A has been found to have a width of up to 10.4 m to the southeast of the TD-1 portal and it will be intersected by the TD-1 decline adit. A second dilation zone (Dilation Zone D farther to the west) with width up to 6.8 m is open to the west and south.

The purpose of drilling the 6 pilot holes down the dip of the MQV in the vicinity of the TD-1 decline adit was to provide information on how results from drill hole samples compare with results of bulk sampling from the decline. The diamond drills on site operate between 47 and 90 degrees, so instead of drilling one pilot hole straight down the MQV, which dips at 40 to 45 degrees the holes were drilled to intersect the MQV at different depths and along strike. Since TD-1 is being developed down plunge of the MQV to follow an apparent anticline widening of the MQV, holes were drilled on 3 sections 50 m apart towards the east from the TD-1 portal (TD-1 is developed toward the southeast). The holes encountered MQV intersections ranging from 12.0 to 48.2 m length sub-parallel to the MQV (not true width) and returned gold grades ranging from detection limits (0.5 g/t gold) to 6.4 g/t gold. The gold results will be compared with the bulk samples results when they become available over the next three months.


A summary of sample preparation and method of gold analysis is herewith presented. All drill core selected for sampling is marked with a unique six-digit sample number from commercial sample tag booklets. The core is cut longitudinally in half using a 35.6 cm diameter table diamond saw. The same side of the cut core is collected for the sample and then placed in double, heavy-duty (200 g) plastic sample bags. The sample tag assigned to the sample is included in the bag and both bags are individually closed/sealed with plastic cinch straps. The samples are delivered daily direct to the on-site independent laboratory operated by Peruvian Analab S.R.L. for sample preparation and standard FA under the overall supervision of Mineral Processing Engineer Gary Hawthorn, P.Eng. (B.C.). who is the Qualified Person for the laboratory.

Samples, whether surface, underground, diamond drill core or mill samples are initially crushed to a nominal minus 6 mesh (3.35 mm) reduced in size using a standard Jones riffle splitter to a nominal 200 - 250 gm sample, then pulverized to a nominal minus 150 mesh (0.1 mm). Of this material 20 (initially only) or 30 grams (current practice) pulp is separated for standard gold Fire Assay. Analab S.R.L. has initially prepared 3 standards of varying grades from the project area under Mr. Hawthorn's direction for Quality Control, one of which is inserted blind by the on-site geological staff (5 standards per 100 samples). For additional Quality Control, Analab S.R.L. analyzes and report result on two Internationally recognized generic standards supplied by CDN Resource Ltd of Vancouver BC. In addition every 5th sample has been analyzed in duplicate to date, although that practice appears redundant and may be discontinued.

The diamond drilling, underground exploration development and bulk sampling program is being supervised by Tor Bruland, P. Geo. and Don Allen, P. Eng., both of whom are Qualified Persons under the Canadian National Instrument 43-101 Standards of Disclosure for Mineral Projects.

On behalf of the Board of Directors,

Carl A. Erickson, President, Eaglecrest Exploration Ltd.

Additional information on the company's project is available on our website www.eaglecrestexplorations.com, the SEDAR website (securities related information electronic filed with the Canadian securities regulatory authorities) www.sedar.com.

The TSX Venture Exchange has neither approved nor disapproved the information contained herein.

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