Resumen: Sienna Gold (BVL:SGP) anuncia la publicación de la estimación inicial de recursos minerales para Callanquitas, correspondiente a su proyecto Igor, en La Libertad.
Puntos a destacar:
- Recurso mineral inferido de 7.2 millones de toneladas con una ley de 1.94 gramos por tonelada (g/t) de oro y 71.8 g/t de plata, lo que equivale a un equivalente a 3.16 de oro Au Eq *) g/t usando una ley de corte de 1.5 Au Eq * g / t.
- Aproximadamente 448 500 oz de oro y 16 600 000 oz de plata, que equivalen a aproximadamente 730 500 oz * Au Eq.
- La estructura Callanquitas permanece abierta a lo largo y en profundidad.
- El costos por descubrimiento es de alrededor de US$14 por Au Eq * onza.
Sienna Announces Callanquitas Mineral Resource Estimate
CALGARY, ALBERTA--(Marketwire - Nov. 13, 2012) - Sienna Gold Inc ("Sienna" or the "Company") (TSX VENTURE:SGP) (LMA:SGP) is pleased to announce the release of an initial mineral resource estimate for the Callanquitas Structure, at its 100%-owned Igor project, in La Libertad, Peru.
Highlights include:
- Inferred Mineral resource of 7.2 million tonnes grading 1.94 grams per tonne (g/t) gold and 71.8 g/t silver, which equates to 3.16 gold equivalent (Au Eq*) g/t using a cut-off grade of 1.5Au Eq* g/t.
- Approximately 448,500 ounces of gold and 16,600,000 ounces of silver which equate to approximately 730,500 Au Eq* ounces.
- The Callanquitas Structure remains open along strike and at depth.
- Discovery cost of about US$14 per Au Eq* ounce.
The mineralization at Callanquitas comprises intermediate sulfidation epithermal gold and silver. It occurs in hydrothermal breccias and sheeted veins. Originally sulfide-rich, these are now strongly oxidised, commonly to more than 300-400 m below surface. Polished thin sections suggest that, in oxidised rocks, the gold occurs freely (not encapsulated in sulphides) and that silver occurs as chlorargyrite, acanthite and native silver. The long section below shows piercement points and AuEq grade as a grams x metre plot.
To view the map associated with this press release, please visit the following link: http://media3.marketwire.com/docs/1113sgpimage.jpg
Epithermal mineralization at Igor was superimposed onto widespread porphyry-style hydrothermal alteration, including sericite + pyrite + quartz.
A table presenting the estimated Inferred Mineral resource is shown below, with various cut-off grades for comparison purposes. Highlighted in the table is a base case cut-off threshold of 1.5 g/t AuEq cut-off which is considered appropriate for potential underground mining activities of a deposit of this type, scale and location. Resource tonnages were estimated using a dry density of 2.55 tonnes per cubic metre.
John Rucci, CEO and President of Sienna Gold Inc, comments, "the Company is very pleased with these results. Given the current market conditions for precious metals, Igor is now a very significant asset. This bodes well for the Company and its shareholders.
Drilling and resource calculation have been completed in a timely fashion. The drilling cost at Callanquitas, about US$ 10 Million, equates to a discovery cost of about US$14 per AuEq ounce.
Furthermore, there is considerable 'upside' potential. Like most epithermal deposits, there are higher grade portions at Callanquitas with great potential for expansion. The long section shows, at a glance, areas where future drilling can potentially expand the resource. The Structure is also open to the south, at depth, and contains gaps that need additional drilling.
Future work includes drilling to increase the size of the resource. Metallurgical testing will also be carried out. Initial petrography is encouraging, with a large part of the potential ore oxidized and therefore possibly amenable to low cost leaching. Surface sampling is also underway on a number of other nearby mineralized structures, with a combined strike length of over 8 km. None of this work would be possible without the support of the community at Callanquitas, for which we are very grateful."
Mineral resources which are not mineral reserves do not have demonstrated economic viability. Confidence in a mineral resource estimate is insufficient to allow the meaningful application of technical and economic parameters or to enable an evaluation of economic viability worthy of public disclosure.
The quantity and grade of reported Inferred Resources in this estimation are uncertain in nature and there has been insufficient exploration to define these inferred resources as an indicated or measured mineral resource and it is uncertain if further exploration will result in upgrading them to an indicated or measured mineral resource category.
All Mineral Resources are reported on a 100% basis for Sienna-controlled properties.
Within 45 days, Sienna will file an NI 43-101 compliant technical report with the applicable securities regulatory authorities that supports the technical information contained herein. This report will be available for viewing under the corporate profile of Sienna Gold Inc. at www.sedar.com.
John M Rucci, President
Fuente: http://tmx.quotemedia.com/article.php?newsid=55855676&qm_symbol=SGP
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