A Guide to the Chemical Classification of the Common Volcanic Rocks
1971/05/01 by T. N. Irvine, Τ. N. Irvine, W. R. A. Baragar +1 · 7,446 citations
Chemistry · Computer Science · Earth and Planetary Sciences · #Alkali basalt #Andesite #Basalt #Basaltic andesite #Dacite #Geochemistry #Geochemistry and Geologic Mapping #Geological and Geochemical Analysis #Geology #Olivine #Peralkaline rock #Petrology #Radioactive element chemistry and processing #Rhyolite #Trachyte #Volcanic rock #Volcano
paper · doi:10.1139/e71-055
published in Canadian Journal of Earth Sciences 8(5), 523-548 (NRC Research Press)
openalex publication_date 1971/05/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Abstract
A system is presented whereby volcanic rocks may be classified chemically as follows:I. Subalkaline Rocks:A. Tholeiitic basalt series:Tholeiitic picrite-basalt; tholeiite; tholeiitic andesite.B. Calc-alkali series:High-alumina basalt; andesite; dacite; rhyolite.II. Alkaline Rocks:A. Alkali olivine basalt series:(1) Alkalic picrite–basalt; ankaramite; alkali basalt; hawaiite; mugearite; benmorite; trachyte.(2) Alkalic picrite–basalt; ankaramite; alkali basalt; trachybasalt; tristanite; trachyte.B. Nephelinic, leucitic, and analcitic rocks.III. Peralkaline Rocks:pantellerite, commendite, etc.
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