Sheffield Samples High-Grade Copper At Moonlight Project.VANCOUVER, British Columbia -- Sheffield Resources Ltd. (TSX VENTURE:SLD (Second Level Domain) See Internet domain name. ), (PINK SHEETS:SLDOF) and (FWB:S2Q) announces initial results from its ongoing sampling program in the Superior Mine located at its Moonlight Project in Plumas County, California Plumas County is a county located in the Sierra Nevada of the U.S. state of California. The county gets its name from the Spanish words for the Feather River (Río de las Plumas), which flows through the county. As of 2000, the population was 20,824. . Sampling on the #1 Level re-confirms the presence of a wide zone of high-grade copper, previously indicated in sampling by Placer Dome Inc. and Sheffield Resources Ltd. Ten continuous samples, each ten feet long, were taken along drift walls across predominately steeply dipping bornite-chalcopyrite mineralization Mineralization The process by which the body uses minerals to build bone structure. Mentioned in: Rickets mineralization, n the bioprecipitation of an inorganic substance. . The results include a 60 foot wide zone averaging 3.74% Cu and 53 g/t Ag, located approximately 50 feet along strike from the crosscut where Sheffield previously sampled 110 feet of 2.6% Cu and 42g/t Ag. Sheffield is also sampling between levels in stopes Stopes , Marie Carmichael 1880-1958. British social reformer who opened England's first birth control clinic (1924) in London and later promoted family planning in east Asia. , approximately 50 feet above the #1 Level, in an area not previously sampled by either Placer or Sheffield. Ten samples were taken vertically, at approximate ten foot spacings, across predominately flat lying bornite-chalcopyrite mineralization in a stope. The samples average approximately 10 feet in length and the weighted average of these ten samples is 6.2% Cu and 124 g/t Ag. Assays on 35 additional underground samples are pending. Sheffield plans to take an additional 75 samples before re-evaluating the Superior Mine high-grade copper/silver mineralization and if warranted will then design a program of surveying, detailed sampling and drilling to define a high grade resource at the Superior Mine. Sheffield continues to expand its holdings through claim staking in the Moonlight District. Reconnaissance sampling on the iron oxide copper-silver-gold target to the south of Moonlight Deposit continues to yield encouraging results. Quality Control and Assurance A rigorous Quality Control and Assurance program (QC/QA QC/QA Quality Control/Quality Assurance ) is in place, including systematic inclusion of standard sample materials, blank samples, duplicate samples and inter-laboratory check assaying. Samples are sent in sealed containers to ALS Als (äls), Ger. Alsen, island, 121 sq mi (313 sq km), Sønderjylland co., S Denmark, in the Lille Bælt, separated from the mainland by the narrow Alensund. Chemex in Reno, Nevada. ALS Chemex is a recognized ISO (1) See ISO speed. (2) (International Organization for Standardization, Geneva, Switzerland, www.iso.ch) An organization that sets international standards, founded in 1946. The U.S. member body is ANSI. 9000 registered laboratory. The control samples and duplicate assay results received for the drilling program demonstrated to Sheffield Resources that the results are considered reliable. Copper is determined by atomic absorption spectrometry after a four acid digestion of a 0.4-gram aliquot aliquot (al-ee-kwoh) adj. a definite fractional share, usually applied when dividing and distributing a dead person's estate or trust assets. (See: share) . A second copper determination plus analyses of silver and other metals are made by ICP-AES ICP-AES Inductively Coupled Plasma Atomic Emission Spectroscopy ICP-AES Inductively Coupled Plasma Atomic Emission Spectrophotometry after a three acid digestion of a 0.4-gram aliquot. The Moonlight Project exploration program is managed by Robert Wetzel, a California registered professional geologist, who is the qualified person responsible for this press release. About Sheffield Resources Ltd. Sheffield Resources Ltd. is an exploration and development company focused on the acquisition and systematic exploration of copper and nickel/cobalt deposits with potential for large tonnages of ore that are located in politically stable areas close to infrastructure with the goal of advancing the deposits to production. |
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