Great Plains Metals Corp. press release
Domo Drilling at Igor Returns Positive Results
TSXV - TSX Venture Exchange · Gold · Copper · Molybdenum · Rare Earth Elements · Uranium · Canada
CALGARY, April 25 /CNW/ - Sienna Gold Inc. (SGP.V TSX Venture Exchange) announces the latest drill results from the Igor property. Nine holes were drilled on the Domo portion of the property targeting gold and silver mineralization in a series of parallel mantos or beds. This drilling confirms the tunnel sampling which was completed and reported in September of 2006.
Latest Assay Results
The assay results for the Domo drilling are shown on the table below.
Total Hole Mineralized Zones Best Interval No. of Hole Gold Silver Length Gold Silver Length Inter- Gold Silver Length No. gpt gpt m gpt gpt m vals gpt gpt m 1 0.3 4.3 23.7 4.6 68.3 1.1 4 1.2 10.2 2.0 2 50.0 Low core recovery 3 55.9 Low core recovery 4 0.2 3.9 35.0 2.4 66.5 5.3 4 1.9 59.4 1.1 5 1.3 23.4 39.7 12.9 164.2 3.4 3 12.6 303.1 2.8 6 1.5 30.5 14.7 8.1 136.1 3.5 3 14.7 263.0 1.1 7 1.2 32.0 32.6 11.6 364 3.9 6 14.7 526.1 1.0 8 0.2 3.2 15.3 4.21 57.2 0.7 3 5.0 63.8 0.3 9 0.9 39.8 6.6 19.6 1150 0.2 1 19.6 1150.0 0.2
The holes were drilled in a 50 meter by 100 meter (approximate) grid measuring 600 meters long by 50 meters wide. The gold bearing, mineralized mantos replaced carbonaceous shale beds during mineralization and drilling recoveries in the manto zones were variable up to 70 percent. The drill cuttings were collected in portions of 5 holes and geochemically analyzed. The table below shows results for cuttings that correlate to the manto areas in the respective drill holes. This data shows that gold and silver was lost during drilling and collected in the mud and cuttings, but there is not enough data to back-calculate insitu grades.
Mud and cuttings significant assay values: Hole Number Length Gold (gpt) Silver (gpt) 5, 1st interval 0.44 9.1 34.2 5, 2nd interval 0.39 2.2 8.1 7, 1st interval 0.39 0.4 93.5 7, 2nd interval 1.08 1.8 34.4
The Domo zone extends over an area approximately 700 meters by 100 meters and the results reported in this press release are from the western half of the mineralized target. The Domo mineralized zone begins on surface and there is no overlying waste material.
Porphyry Support
The anomalous values of lead and antimony measured in the drill samples (up to 9.3% lead) with lesser anomalous values of zinc supports the Company's belief that the Domo may overlie a significant copper porphyry system. Additional geophysical and extensive surface sampling was recently completed on the porphyry target at Igor and the Company is meeting with its consultants to design expanded drill programs for both the Domo and porphyry targets.
Pachin Alto
The Company is now drilling on the Pachin Alto concession. A second geophysical (IP) program was recently completed and is helping position several 400 meter deep holes that will test high sulfidation targets.
Sampling Methodology
Cores taken from the diamond drill rig are stored in plastic core boxes and transported to the camp site for detailed logging. When logged the core is sent from the project site to the Company's secured site in Trujillo for splitting with a diamond saw. One half of the split core is then sent to an accredited laboratory in two meter sample lengths. The Company's independent, qualified person has completed a chain of custody review to ensure the integrity of all sample data.
Assaying Methodology
The samples were analyzed by ALS Chemex Laboratories in Lima by inductively coupled plasma atomic emission spectroscopy ("ICP-AES") analysis for silver and 33 other elements and a 30 gram fire assay technique for the gold analysis. Samples which exceeded the detection limits were re-assayed using a gravimetric fire assay technique. The specific procedures used by the lab can be found in the company's 43-101 report on the Igor property.
Sienna Gold Inc. continues to explore in Peru for precious and base metals. Its major projects are IGOR and Pachin Alto which continue to hold management's attention and exploration direction.
This press release has been reviewed and approved by Murray Lytle, P.Eng. who is the company's Qualified Person.
The TSX Venture Exchange has neither approved nor disapproved of the
information contained herein.
Statements in this press release regarding the Company's business which are not historical facts are "forward-looking statements" that involve risks and uncertainties, such as estimates and statements that describe the Company's future plans, objectives or goals, including words to the effect that the Company or management expects a stated condition or result to occur. Since forward-looking statements address future events and conditions, by their very nature, they involve inherent risks and uncertainties. Actual results in each case could differ materially from those currently anticipated in such statements.
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