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Message: Announces Initial Resource Estimate for the Nieves Silver Deposit
| March 2, 2009 | |
| Quaterra Announces Initial Resource Estimate for the Nieves Silver Deposit | |
VANCOUVER, BRITISH COLUMBIA--(Marketwire - March 2, 2009) - Quaterra Resources Inc. (TSX VENTURE:QTA)(NYSE Alternext US:QMM) and 50% joint-venture partner Blackberry Ventures 1, LLC, today announced that Caracle Creek International Consulting Inc. of Toronto, Canada, has completed a NI43-101 compliant independent resource estimate for its Nieves silver property in northern Zacatecas, Mexico.Estimated mineral resources(1) Concordia vein system, Nieves Property ------------------------------------------------------------- Category Tonnes Ag (g/t) Au (g/t) Ag (oz)(2) Au (oz)(2) ------------------------------------------------------------- Indicated 2,897,571 110.231 0.126 10,269,203 11,701 ------------------------------------------------------------- Inferred 2,256,596 96.562 0.115 7,005,797 8,373 ------------------------------------------------------------- 1) Prepared by Michelle Stone, P.Geo., Caracle Creek International Consulting Inc., an independent Qualified Person within the meaning of NI 43-101, using a reporting cut-off grade of 60 g/t Ag. 2) 1 troy ounce equals 31.103 grams. The Caracle Creek report concludes that the resource displays strong continuity along strike and down dip and that mineralization continues beyond the extent of current drilling. The report recommends additional drilling to the west and east along the Concordia vein at a drill spacing of 100 metres or less to expand the mineralization and closer spaced drilling on 10-20 metre centres to define the extent of high grade mineralization (+500 g/t silver). "The initial Nieves resource estimate is very encouraging," says Tom Patton, Quaterra's CEO. "We have completed grid drilling on only one third of the Concordia vein so the opportunity to expand the resource is excellent. I am also confident that closer-spaced drilling within the currently defined resource will demonstrate continuity of high-grade zones that were difficult to constrain in the current model." Mineral Resource Estimate The mineral resource estimate for the Nieves Property was completed by independent consultant Michelle Stone, P.Geo., Caracle Creek International Consulting Inc., using accepted, industry standard methods that conform with National Instrument 43-101. The resource model was been developed using Gemcom Surpac (v6.1). Drilling completed in 2008 has been successful in defining a large proportion of the resource at Nieves as an indicated mineral resource category. This drilling shows that the mineral resource displays strong continuity along strike and down dip and that mineralization continues outside of the current drilling extents. Resource Estimation Methodology The data and methodology utilized for the resource estimate is as follows: The resource model has been generated from a database containing a total of 44 diamond drill and 2 reverse circulation holes collared from the surface. Drill holes have been oriented to intersect the mineralized zone at a spacing of 50-60m down to approximately 250m depth. Below this depth drill hole spacing is irregular. All drilling has been conducted from the hangingwall side of the Property and planned to intersect perpendicular to the orientation of the mineralized domain. Drill hole samples have been analyzed for silver and gold at ALS Chemex in Vancouver. All sample results are monitored with an appropriate QA/QC program. Bulk density was measured on core and pulp samples through the mineralized zone by ALS Chemex. The zone which hosts the mineralization at Nieves has been interpreted using a combination of geological information and sample grade results in the drilling data. This "mineralized domain" includes thin, discrete hangingwall and footwall veins in addition to the Concordia vein and strikes approximately 250 degrees for a distance of approximately 835m, dips -65 degrees to the south and extends to a depth of at least 900m. The thickness of the mineralized domain ranges from several metres to approximately 80m, with an average thickness of about 20m (true). The mineralized domain is open to the east, west and down dip. Sample data has been composited to 2m intervals. The presence of potential outlier sample data has been evaluated and appropriate top cuts have been applied for silver (371.2 g/t) and gold (0.4175 g/t). The grade of blocks measuring 10m by 5m by 2m were estimated using inverse distance squared. A technical report on the Nieves Property will be filed with SEDAR within 45 days. On behalf of the Board of Directors, Thomas Patton, President and CEO, Quaterra Resources Inc. |
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