| alteration: | Pervasive oxidation, attributed to weathering, is prevalent to depths of as much as approximately 50 to 75 meters (Rogers and others, 1998). Fine-grained, botryoidal, chalcedonic quartz coated with magnesium oxide is associated with the oxidation. The rocks have been subjected to pervasive sericitic and silicic, hydrothermal alteration, and contain silicic and stockwork quartz-sericite-sulfide veins (Rogers and others, 1998). |
| References: |
- Rogers, J.A., McCoy, D. T., Nerup, M., Yuengling, K., Bean, K., Cameron, C., Grahm, G., Frantz, P., and Athey, J., 1998, Placer Dome-Silverado lease, 1998 annual report for Ester Dome: 68 p. (Report held by Range Minerals, Inc., North Pole, AK 99705.)
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