Comparison of hot hydroxylamine hydrochloride and oxalic acid leaching of stream sediment and coated rock samples as anomaly enhancement techniques
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Abstract
A hot hydroxylamine hydrochloride (H-Hxl) extraction in 25% acetic acid is compared with the commonly used oxalic acid extraction as a method of anomaly enhancement for Cu and Zn in samples from two very different metal deposits and climatic environments. Results obtained on minus-80-mesh stream sediments from an area near the Magruder massive sulfide deposit in Lincoln County, Georgia, where the climate is humid subtropical, indicate that H-Hxl enhances the anomaly for Cu by a factor of 2 and for Zn by a factor of 1.5, compared to the oxalic method. Analyses of Fe oxide-coated rock samples from outcrops overlying the North Silver Bell porphyry copper deposit near Tucson, Arizona, where the climate is semi-arid to arid, indicate that both techniques effectively outline the zones of hydrothermal alteration.
The H-Hxl extraction can also perform well in high-carbonate or high-clay environments, where other workers have suggested that oxalic acid is not very effective. Therefore, the H-Hxl method is recommended for general exploration use.
Suggested Citation
Filipek, L., Chao, T.T., Theobald, P.K., 1982, Comparison of hot hydroxylamine hydrochloride and oxalic acid leaching of stream sediment and coated rock samples as anomaly enhancement techniques: Journal of Geochemical Exploration, v. 17, no. 1, p. 35-47, https://doi.org/10.1016/0375-6742(82)90018-8.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Comparison of hot hydroxylamine hydrochloride and oxalic acid leaching of stream sediment and coated rock samples as anomaly enhancement techniques |
| Series title | Journal of Geochemical Exploration |
| DOI | 10.1016/0375-6742(82)90018-8 |
| Volume | 17 |
| Issue | 1 |
| Year Published | 1982 |
| Language | English |
| Publisher | Elsevier |
| Description | 13 p. |
| First page | 35 |
| Last page | 47 |