Mineralogy, chemistry, and diagenesis of tuffs in the Sucker Creek Formation (Miocene), eastern Oregon

S. P. Altaner, R. E. Grim

Research output: Contribution to journalArticlepeer-review

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 languageEnglish (US)
Pages (from-to)561-572
Number of pages12
JournalClays & Clay Minerals
Volume38
Issue number6
DOIs
StatePublished - Jan 1 1990

ASJC Scopus subject areas

  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth and Planetary Sciences (miscellaneous)

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