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Analysis of fluoride in rocks and an application to exploration

1973; Elsevier BV; Volume: 2; Issue: 1 Linguagem: Inglês

10.1016/0375-6742(73)90027-7

1879-1689

S. E. Kesler, J.C. Van Loon, J.H. Bateson,

Groundwater and Isotope Geochemistry

The fluoride∗ content of rocks can be measured using a selective ion electrode. Analyses were made using a sodium hydroxide fusion and ammonium citrate buffer and measurements can be compared to standard or can be made by standard addition using the Gran's Plot method. The Gran's Plot method yields fluoride values in agreement with known values for standard rocks. Values obtained by these two methods vary sympathetically. Furthermore, whole rock fluoride values vary sympathetically with water-leachable fluoride values, which permits use of simpler, less expensive methods for field exploration purposes. Application of these procedures to an area of tin mineralization indicates that easily distinguishable anomalous fluoride values for water leach and total fluoride in rocks are associated with areas of tin mineralization.