News - Drill results- having trouble posting table
rvana Announces Drill Results and Provides an Operations Update at El Valle-Boinas/Carles Gold/Copper Mine, Northern Spain
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TORONTO, ONTARIO--(Marketwire - Sept. 22, 2011) - Orvana Minerals Corp. (TSX:ORV) is pleased to announce drilling results and an operation update for its El Valle-Boinas/Carles ("EVBC") gold-copper mine in Northern Spain by Kinbauri Espana S.L.U. ("Kinbauri"), a wholly-owned subsidiary of Orvana Minerals Corp.
Underground drilling commenced last autumn and by the end of August, 12,351 metres have been completed (see January 20, March 24, and June 28, 2011 press releases for selected drill results). Whereas the focus of this drilling was for mine development, many of the holes were step-outs beyond known NI 43-101-compliant resources. Independent qualified persons for the purposes of NI 43-101 have been retained to update both the resources and reserves over the next two months.
At Black Skarn NW, both epithermal vein (11V1205) and skarn (11V1204) mineralization were encountered in an area not previously drilled; these drillholes will be offset at an opportune time in an attempt to define orebodies (visit the following link to view the map: https://www.orvana.com/projects/pdf/el-valle-black-skarn.pdf). At Carles NW, the drill holes penetrated mineralization about 100 metres below known resources along the downdip extension of the subvertical skarn. The Boinas East drillholes reported herein were step outs and the Carles North drill hole was for stope definition. A summary of selected results is shown in the table below.
Note: True thicknesses were determined graphically by measuring the distance approximately perpendicular to the contacts. No values were capped.
Whereas the Black Skarn NW mineralization is principally hosted by subhorizontal to moderately-dipping skarns, the Carles NW mineralization is hosted by subvertical skarns. The epithermal vein drilled by 11V1205 in the Black Skarn NW area is a new discovery.
Although the two exploration drill holes at Godan encountered skarn and anomalous gold and silver, no ore-grade intercepts were encountered. The geologic team will evaluate the results in the context of future regional exploration.
August production was 2,641 ounces of gold, 5,000 ounces of silver, and 208,844 pounds of copper from an average daily throughput of 1,542 tonnes with head grades of 1.94 grams per tonne gold, 6.21 grams per tonne silver, and 0.30% copper. The commissioning of the mine is advancing positively. Throughput is better than the planned 1,400 tonnes per day, which throughput will increase to 1,900 tonnes per day when the shaft is completed in early 2012. Gold head grades should steadily increase over the next few months and 2012 monthly gold production is targeted at an average of 5,000 ounces per month.
More information related to the EVBC geology and mineralization can be found on the Company's website www.orvana.com.
QA/QC
Security measures were taken to ensure the integrity and validity of the mineralization and proximal rocks in the new drill core under the supervision of Santiago Gonzalez-Nistal, Chief Geologist, Kinbauri Espana S.L.U., a qualified person for the purposes of NI 43-101. The core was sampled based on lithologic and alteration considerations. Assays for the samples were analyzed at Kinbauri Espana SLU laboratory on site; pulps were sent to ALS Chemex for check analyses. The QA/QC protocol included internal and laboratory certified reference materials, blanks, duplicates and check assays. At the EVBC laboratory, a 30-gram sample was analyzed by fire assay methods for gold, and copper, silver, arsenic and antimony were analyzed by ICP-optical emission spectroscopy after an agua regia digestion. Also, a 30-gram sample was analyzed by fire assay methods for gold and a conventional ICP-AES analysis was used for the analysis of 35 elements at ALS Chemex.