Hydration of natural glass and formation of perlite
Geological Society of America Bulletin
By: I. Friedman, R.L. Smith, and W.D. Long
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Abstract
The hydration rate of rhyolitic glass has been determined at temperatures ranging from 5° C to 100° C. The relationship between the depth of hydration, x, and time, t is x2 = kt; k varies from 0.4 μ2/103 years at 5° C to 104 μ2/103 years at 100° C; k is independent of the water pressure from a few hundredths of a centimeter to 1 atm. water pressure. The activation energy of hydration is about 20 kcal/mole. The determined hydration rates are consistent with the observation that perlite commonly forms by the hydration of shattered rhyolitic glass, either during the late cooling of a deposit or after the deposit has cooled to a surficial temperature.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Hydration of natural glass and formation of perlite |
| Series title | Geological Society of America Bulletin |
| DOI | 10.1130/0016-7606(1966)77[323:HONGAF]2.0.CO;2 |
| Volume | 77 |
| Issue | 3 |
| Year Published | 1966 |
| Language | English |
| Publisher | Geological Society of America |
| Description | 6 p. |
| First page | 323 |
| Last page | 328 |