Sienna Gold Inc.: Further Success at Callanquitas: 11.1 Meters at 3.5 Grams per Tonne Gold

Marketwired

CALGARY, ALBERTA--(Marketwire - Sept. 4, 2012) - Sienna Gold Inc ("Sienna" or the "Company") (SGP.V) (SGP.V) is pleased to announce the latest results from new drill holes at Callanquitas, on the Igor project, La Libertad, Peru. The ten holes totalled 1393.7 meters (m).

Drill Results

The best results came from Hole CA-12-65 with 11.1 metres (m) at 3.5 grams/tonne (g/t) gold and 35 g/t silver within an overall interval of 19.4 m at 2.2 g/t gold and 33 g/t silver

Drill hole CA-12-61 cut a number of mineralized zones: 2.55 m at 3.3 (g/t) gold and 7 g/t silver, 11.2 m at 1.2 g/t gold and 86 g/t silver and 9.4 m at 1.6 g/t gold and 59 g/t silver.

Full results are given in the table below. A map of drill hole locations is shown below, as is Section N4440. Further maps and cross sections are now available on the Sienna website.

Map of Collars and Drill Hole Traces and Section N4440: http://media3.marketwire.com/docs/sgp_map.pdf

The Callanquitas Structure

Dr Warren Pratt, Director of Sienna, comments, 'These excellent results come from drill holes that are widely distributed along the Callanquitas Structure. Mostly of 'step-out' character, they confirm the continuity of the structure and will contribute to the resource calculation, expected in late October 2012. These results come from shallower portions, where silver grades are lower. Significant portions of the Callanquitas Structure remain untested by drilling.'

Assay results for drill holes CA-12-56 to CA-12-65.

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Drill Hole From To Interval(1) Weighted Averages(2)

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(m) (m) (m) Gold (g/t) Ag (g/t)

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CA-12-56 59.20 76.80 17.60 0.9 3

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including 69.40 73.20 3.80 2.8 2

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including 75.30 76.80 1.50 1.5 27

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CA-12-57 103.90 112.80 8.90 0.8 2

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including 103.90 107.85 3.95 1.6 3

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CA-12-57 157.50 171.20 13.70 0.6 8

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including 159.90 160.50 0.60 2.4 50

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CA-12-58 0.00 1.00 1.00 0.1 108

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CA-12-59 68.00 95.50 27.50 0.6 4

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including 72.50 75.00 2.50 1.8 3

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including 80.90 83.40 2.50 3.2 4

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CA-12-60 52.00 60.70 8.70 0.7 3

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including 56.90 58.75 1.85 2.0 13

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including 60.10 60.70 0.60 2.3 3

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CA-12-61 7.45 12.20 4.75 0.8 10

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including 8.50 10.00 1.50 2.1 15

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CA-12-61 61.25 63.95 2.70 0.3 35

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CA-12-61 72.15 92.50 20.35 0.7 4

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including 84.95 87.50 2.55 3.3 7

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CA-12-61 143.20 166.00 22.80 1.0 48

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including 144.30 155.50 11.20 1.2 86

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including 160.70 162.30 1.60 2.8 48

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CA-12-61 180.50 211.10 30.60 0.9 40

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including 184.00 187.00 3.00 1.7 36

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including 195.10 204.50 9.40 1.6 59

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including 208.60 211.10 2.50 1.5 45

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CA-12-62 24.00 26.00 2.00 0.3 23

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CA-12-63 12.30 19.00 6.70 0.2 1

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CA-12-63 46.90 48.30 1.40 3.1 4

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including 47.80 48.30 0.50 7.7 7

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CA-12-63 64.10 65.50 1.40 0.0 53

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CA-12-64 55.80 58.90 3.10 0.2 32

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CA-12-65 68.60 88.00 19.4 2.2 33

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including 71.10 82.20 11.1 3.5 35

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including 74.60 77.3 2.7 5.4 37

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(1)It should be noted that these are all angled holes and downhole 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: www.siennagold.com.

Exploration Update

One man portable rig remains on site. A total of 15,000 m has been drilled to date.

The new resource for the Callanquitas Structure, based on approximately 20,000 m of drilling, should be published in mid to late October with the full NI 43-101 report to follow before the end of the year.

Drilling will, however, continue at Callanquitas and extend to Domo and Tesoros in late 2012/early 2013.

Sampling Methodology

Cores taken from the diamond drill rig are stored in plastic core boxes and transported to the camp for detailed geotechnical and geological logging. Density and Point Load testing are carried out. Afterwards, the core is cut on site with a diamond saw. One half is then sent to an accredited laboratory in various sample lengths.

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 Company is exploring 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

WARNING: the Company relies upon litigation protection for "forward looking" statements. The information in this release may contain forward-looking information under applicable securities laws. This forward-looking information is subject to known and unknown risks, uncertainties and other factors that may cause actual results to differ materially from those implied by the forward-looking information. Factors that may cause actual results to vary materially include, but are not limited to, inaccurate assumptions concerning the exploration for and development of mineral deposits, currency fluctuations, unanticipated operational or technical difficulties, changes in laws or regulations, the risks of obtaining necessary licenses and permits, changes in general economic conditions or conditions in the financial markets and the inability to raise additional financing. Readers are cautioned not to place undue reliance on this forward-looking information. The Company does not assume the obligation to revise or update this forward-looking information after the date of this release or to revise such information to reflect the occurrence of future unanticipated events, except as may be required under applicable securities laws.

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Contact:
John Rucci
Sienna Gold Inc.
President
403-508-2061
403-508-2670 (FAX)
rucci@siennagold.com
www.siennagold.com

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