Abstract
Based on its chemistry and mineralogy, the bentonite appears to have been derived from dacitic volcanic ash. Chemical considerations and the close spatial relationship between beds of bentonite and opal-CT suggest that the diagenetic alteration of glass to smectite provided silica to the adjacent opal-CT beds. Based on the presence of late-stage Ca-clinoptilolite, alteration appears to have proceeded in a relatively closed chemical system. Based on the composition of preserved vitric tuff, the zeolitic tuffs appear to be derived from rhyolitic ash. -from Authors
| Original language | English (US) |
|---|---|
| Pages (from-to) | 561-572 |
| Number of pages | 12 |
| Journal | Clays & Clay Minerals |
| Volume | 38 |
| Issue number | 6 |
| DOIs | |
| State | Published - 1990 |
ASJC Scopus subject areas
- Water Science and Technology
- Soil Science
- Geochemistry and Petrology
- Earth and Planetary Sciences (miscellaneous)