U.S. Geological Survey Certificate of Analysis
Material for this standard was collected in 1965 by Dr. David P. Gold at the St. Lawrence Columbium and Metals Corporation Ltd. Oka complex. The collection site is located approximately 20 miles west of Montreal, Canada on the north shore of the Lake of Two Mountains. The age of the Oka complex is indicated as 100±15 million years and is composed primarily of ultramafic alkaline and carbonate rocks. At the time of collection, the site was the world's largest single producer of niobium.
Analytical results reported here are for information purposes only. Reported values are based results from only one or two laboratories or independent techniques. The data has not been subjected to a rigorous statistical analysis, and therefore should be used with caution.
|Oxide||Wt %||±||Oxide||Wt %||±|
April 3, 1995
Dr. Geoff Plumlee
U.S. Geological Survey
Central Region Mineral Resources Team
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U.S. Geological Survey
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