Sienna Gold Inc.

Sienna Gold Inc.

May 02, 2012 09:00 ET

Sienna Reports 5.45 Meters (m) at 6.7 Grams Per Tonne Gold (g/t) and 187.3 g/t Silver Within 15.3 m Grading 2.7 g/t Gold and 76.7 g/t Silver

CALGARY, ALBERTA--(Marketwire - May 2, 2012) - Sienna Gold Inc. ("Sienna" or the "Company") (TSX VENTURE:SGP) (LMA:SGP) is pleased to announce the latest results from the new drill holes and surface sampling at Callanquitas, on the Igor project, La Libertad, Peru. The four holes totalled 1063.4 meters (m) while 88 surface samples are also reported.

Drill Hole Results

The best results are from Hole CA-12-34. This gave 5.45 m at 6.7 grams/tonne (g/t) gold and 187.3 g/t silver within a longer interval of 15.3 m at 2.7 g/t gold and 76.7 g/t silver. This hole also gave the highest grade sample from this batch: 1.75 m at 12.3 g/t gold and 530.0 g/t silver.

Drill holes CA-12-33 and CA-12-35 also returned excellent results: 7.7 m at 2.5 g/t gold and 60.7 g/t silver and 4.7 m at 5.0 g/t gold and 26.3 g/t silver respectively. Full results are given in the table below.

Drill holes CA-12-33, 34 and 35 are from the oblique section NO4200 that contains drill hole CA-11-06, drilled in the 2010-2012 campaign. This section is shown below. Further maps and cross sections are available on the Sienna Gold website.

To view a map of collars and drill hole traces and section NW4200, click the following link:

Surface Sampling

Surface sampling and mapping continued in 2012, with 88 samples collected from trenches and workings along the Callanquitas Structure. Of these, 38 contained 0.5 g/t or more gold whilst 28 were equal to, or greater than, 1 g/t gold. 8 samples contained more than 31 g/t silver.

The most significant samples are:

Sample No Gold g/t Silver g/t
I237874 11.2 242
I237902 5.1 1.6
I237934 4.6 7.6
I237883 4.3 79.1
I237886 4.0 126

Maps showing the results of this sampling are available on the Sienna Gold website.

The Callanquitas Structure

Dr. Warren Pratt, consulting geologist and director of Sienna Gold, comments, "Once again we are very pleased with these results. Every drill hole hits the structure where predicted and gold and silver mineralization is present consistently.

Results from Section NW4200 are particularly interesting: 1) it lies a full 350-400 m south of the high grade zone mentioned in previous releases (4600N); 2) they indicate that mineralization is open to the south, where there is very little drilling; 3) they again show vertical continuity (>300 m), 4) Hole CA-12-33 is the deepest intercept to date, cutting the structure at 2970 m elevation; 5) mineralization is again open at depth.

The new surface samples show high grade samples along the entire length of the Callanquitas Structure. This sampling is particularly useful for planning step-out drilling later this year."

Assay results for drill holes CA-12-32 to CA-12-35 (and the best intercept from CA-11-06 issued in press release dated 19 April 2011).

Drill Hole From To Interval Weighted Averages
(m ) (m ) (m ) Gold (g/t ) Ag (g/t )
CA-11-06 142 183.3 41.3 1.2 16.9
Including 159.2 170.5 11.3 3.9 45.5
CA-12-32 101.5 145 43.5 0.6 17.6
including 105.9 109.2 3.3 2.9 161.3
including 114.9 116.2 1.3 1.4 18.3
including 141.7 143.3 1.6 2.9 2.9
CA-12-33 317.1 341.1 24 1.0 21.0
including 327.3 335 7.7 2.5 60.7
including 327.3 328.9 1.6 6.3 292.9
CA-12-34 265.7 281 15.3 2.7 76.7
including 273 278.45 5.45 6.7 187.3
including 275.25 277 1.75 12.3 530.0
CA-12-34 315 317 2 1.8 1.1
CA-12-35 113.4 125.7 12.3 2.1 12.5
including 118.7 123.4 4.7 5.0 26.3

1. It should be noted that these are all angled holes and down hole intervals do not necessarily reflect the true width of the mineralized structure.

2. Weighted averages were calculated for continuously mineralized intervals using a bottom cut on 0.1 - 0.2 g/t gold, no top cut and minimum internal waste.

A full list of drill holes and significant intercepts is available on the website:

Exploration Update

Two rigs continue on site: one large tracked rig and a man portable rig. A total of 8900 m has been drilled to date, as part of the current campaign of 10,000-12,000 m for Callanquitas and 3,000 m for Domo and Tesoros.

A new NI 43-101 resource calculation is planned for late 2012.

Sampling Methodology

Cores taken from the diamond drill rig are stored in plastic core boxes and transported to the camp for detailed logging. Afterwards, the core is cut on site with a diamond saw.

One half is then sent to an accredited laboratory in various sample lengths. Randy Henkle (PGeol), the Company's independent Qualified Person, completed a chain of custody review to ensure the integrity of all sample data.

Assaying Methodology

The samples are analysed by SGS Laboratories in Lima by inductively coupled plasma atomic emission spectroscopy for silver and 37 other elements (included Hg and Te) and a 30 gram fire assay technique for gold. Samples above detection limits are re-assayed using a gravimetric fire assay. The specific lab procedures can be found in the Company's 43-101 report on the Igor property.

This press release was reviewed and approved by Dr. Warren Pratt (CGeol) who is a "Qualified Person" according to National Instrument 43-101.

Sienna Gold Inc. is a gold exploration company with property interests in Peru. Its key prospect is the Igor Mine Project, a formerly producing mine that the Corporation plans to explore further.

If you wish any further information, please feel free to contact John Rucci at any of the contact points noted above.

John M. Rucci, President

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.

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

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