Great Plains Metals Corp. press release
Sienna Gold Inc. - Significant Assay Results and Porphyry Evaluation
TSXV - TSX Venture Exchange · Gold · Copper · Molybdenum · Rare Earth Elements · Uranium · Canada
CALGARY, April 26 /CNW/ - Sienna Gold Inc. (SGP TSX Venture Exchange) wishes to announce that it has completed 2 additional drill holes on the Igor property and will soon have 3 rigs working to make up the delays caused by difficult drilling conditions and a worse than normal rainy season. The rainy season peaks in February and March moving into the dry season in April. A summary of the 141.25 meter hole 9b is shown below. The hole was collared at elevation 3232 and drilled approximately perpendicular to the strike of the breccia zone and an inclination of 37 degrees from the vertical. It entered the breccia zone at elevation 3159 and penetrated a true thickness of approximately 27 meters.
<< Interval Distance Au Ag meters gpt gpt
85.03 - 128.65 43.6 0.55 39.6 including 102.99 - 124.28 21.3 1.00 63.2 including 113.38 - 124.28 10.9 1.99 60.9
A summary of the 176.2 meter hole number 9a is shown on the table below. The hole was collared at the same location as hole 9b and drilled at an inclination of 15 degrees from the vertical. It entered the breccia zone at elevation 3110 and penetrated a true thickness of approximately 3 meters of mineralization.
Interval Distance Au Ag meters gpt gpt
124.30 - 135.3 11.0 0.84 45.7 including 128.65 - 132.8 4.1 1.41 59.9
This drill intercept is consistent with earlier surface mapping which indicates that the breccia zone in this area is replaced by the porphyry intrusion. Surface and tunnel sampling in the lower part of the Tesoros zone indicates the breccia widens to 45 meters as the intrusive zone thins. This will be tested by additional drilling. Work continues to define the northern limit of the breccia zone which surface sampling indicates extends at least 300 meters. One of the drills is working in an ancient landslide area to confirm this extension. In order to reference these results the following table shows the average grades of known epithermal, high sulfidation gold resources in Peru.
Average Grade Yanacocha 1.0 Pierina 2.1 Lagunas Norte 1.2 Comarsa Santa Rosa 0.5 La Zanja 0.9 Sipan 1.9 Quicay 1.1
Additional Exploration Targets
The Company is continuing its program of mapping and sampling in other regions of the 1000 hectare concession and several additional drilling targets in two different mineralization models have been identified. As reported in a previous press release, the Domo style mineralization comprises several mantos or beds of high mineralization separated by Santa formation shales which early work indicates are also mineralized. Two significant areas of this mineralization style have been identified and work is progressing to confirm, by sampling and drilling, the continuous nature of the mineralization. Additionally large areas of porphyritic intrusive rocks have been mapped both at the base of the mountain as well as at its peak. Samples to-date confirm that the intrusive is mineralized with anomalous values of lead, zinc and mercury. This suggests that the outcrops are at the near-distal edge of a significant porphyry system. Mapping and sampling are continuing and work will commence in the next two weeks on an induced polarization, geophysical survey of 4 intrusive zones to identify the mineralization at depth.
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 are analyzed by an accredited laboratory in Lima by atomic absorption for silver 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. Blank samples are randomly inserted into the sample runs and referee assays are done on randomly selected samples to confirm the laboratory results. The specific procedures used by the lab can be found in the company's 43-101 report on the Igor property.
This press release has been reviewed and approved by Murray Lytle, P.Eng. who is the company's Qualified Person.
Sienna Gold Inc. continues to explore in Peru for precious and base metals. Its major project is IGOR which continues to hold management's attention and exploration direction.
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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