Business
Pacifica's Gravity Testwork Successful for Howard's Pass, Yukon
Pacifica's Gravity Testwork Successful for Howard's Pass, Yukon.
About this update from Edm Resources Inc
[{"type":"text","content":"\n\n\n\n\nTrading Symbol: PAX.TSX-V \n\nVANCOUVER, Feb. 13 /CNW/ - Pacifica Resources Ltd. (PAX.TSX-V) reports on\npositive results from gravity separation testwork on samples from Anniv,\nBrodel and XY deposits at their Howard's Pass project. The recent\nmetallurgical program was designed to evaluate the specific gravity\ncharacteristics of the zinc-lead mineralization at the Howard's Pass property.\nSamples were collected from Anniv, Brodel and XY zones and are considered to\nbe representative of the Run-of-Mine (ROM) ore feed. The separation of dense\n(zinc and lead) mineralization from less dense (gangue) waste provides an\neffective pre-concentration before milling.\nIn April, 1977 US Steel Corporation conducted a similar study of gravity\ntestwork on mineralization from Howard's Pass which gave positive results.\nTheir testing showed a mineral (zinc-lead) content upgrade of over 200% with a\nrejection of 70% of the run-of-mine (ROM) material. The combined lead/zinc\ngrades went from 10.9% to 29.2% with a lead and zinc recovery of 87% and 76%\nrespectively.\n\nHighlights:\n\n- Gravity separation testwork by Pacifica demonstrated rejection of\n 39.4% to 45.87% of the ROM material, which provided an upgrade of mill\n feed material to 140% to 150% for zinc and 150% to 160% for lead.\n\n- Testwork confirms high recoveries previously obtained in US Steel's\n 1977 testwork and in preliminary testwork undertaken by Pacifica in\n 2004. (see July 21, 2005 news release).\n\nMineralization at Howard's Pass consists of banded zinc-lead\nmineralization intercalated with barren to weakly mineralized shale beds.\nSpecific gravity of the banded zinc-lead mineralization varies from 4.0 to 7.6\ncompared to the less dense gangue zones that range from 2.0 to 2.8. The ROM\nhas an overall specific gravity range of 2.8 to 3.0 reflecting a high\nproportion of waste in the ROM.\nThe laboratory testwork was completed at SGS Lakefield Research under the\nsupervision of Pacifica's metallurgical consultant Godfrey McDonald. Further\nmetallurgical testwork (flotation) on products from the gravity study is\ncurrently in progress. Mr. McDonald is the Qualified Person within the meaning\nof NI 43-101.\nThe laboratory evaluation was done on samples (15 kilograms each) using\nHeavy Liquid Separation (HLS) for the separation at designated specific\ngravities ...