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Frank Cogswell Canney

Publications and source records attributed to Frank Cogswell Canney.

6 recordsLinked to original sources
USGS1970

Remote detection of geochemical soil anomalies

This paper describes a preliminary experiment that was made to compare the spectral reflectance from trees growing in soil over a mineral deposit with reflectance from trees of the same species growing in a nearby unmineralized area. Although the measurements were made on a relatively small number of trees, some significant differences were obtained and the overall results are encouraging enough to warrant additional studies. Preliminary results suggest that measurement of spectral reflectance may become a dramatic new way of detecting geochemical soil anomalies by remote means in tree-covered areas.

Open-File Report↗
USGS1964

Determination of ammonium citrate-soluble cobalt in soils and sediments

A rapid field method for the determination of cold-extractable cobalt in soils and sediments has been developed for use in geochemical prospecting. Readily available cobalt is dissolved by treating the sample with an aqueous ammonium citrate-hydroxylamine hydrochloride solution; the filtered citrate extract is then treated with 2-nitroso1-naphthol to form a pink-colored cobalt complex which is concentrated in a floating organic layer by a 1 to 3 mixture of carbon tetrachloride and cyclohexane. After the organic extract is shaken with potassium cyanide solution to eliminate interference by copper and nickel, the intensity of the pink to red color is estimated by comparison with a standard series. A concentration range of 1 to 60 ppm is obtained when a 0.2-g sample is used but this range is varied easily by adjustment of sample size and volume of organic solvent. A minimum of 100 determinations per 8-hour day can be made, and because only simple, readily portable items of equipment are required, the method is adapted to use under rough field conditions, at the sample site if desired.

Open-File Report↗
USGS1964

Suggested exploration target in west-central Maine

Reconnaissance geochemical drainage surveys have located a stream in the southern part of the Long Pond quadrangle in Somerset County, Maine, where the active stream sediment contains as much as 2,500 parts per million (ppm) lead and 7,000 ppm zinc. Although this anomaly has been known for some time, its apparent significance has recently increased. Reappraisal of the anomalous pattern in the light of a large quantity of geochemical data obtained by a regional geochemical mapping program during the past two years has shown that this lead anomaly is by far the strongest one yet found by the Geological Survey in Maine. Galena-and pyrite-bearing quartz veins are present in the drainage basin of this stream, but the exposed veins are not believed to contain enough lead to be the principal cause of the geochemical anomaly. Accordingly, the drainage basin of this stream is believed to be above average in mineral potential. The anomalous stream, here named Pyrite Creek for convenience, is the northeastern branch of a major tributary to Bean Brook. Figure 1 presents the data of the detailed geochemical survey along Pyrite Creek, reconnaissance geochemical data in the surrounding area, and the approximate distribution of the major rock types.

Maine↗