A proposal by the IUGS Subcommission on the Systematics of Igneous Rocks for a chemical classification of volcanic rocks based on the total alkali silica (TAS) diagram

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Authors:LeMaitre, R. W.
Author Affiliations:Primary:
Univ. Melbourne, Dep. Geol., Parkville, Victoria, Australia
Volume Title:Australian Journal of Earth Sciences
Source:Australian Journal of Earth Sciences, 31(2), p.243-255. Publisher: Blackwell, Melbourne, Victoria, Australia. ISSN: 0812-0099
Publication Date:1984
Note:In English. 18 refs.; illus. incl. tables
Summary:The IUGS Subcommission on the Systematics of Igneous Rocks recommends that volcanic rocks should be classified on a non-genetic basis using the total alkali-silica (TAS) diagram. This is divided into 14 fields, three of which contain two root names which are separated according to other chemical criteria, giving the following 17 root names: basalt, basaltic andesite, andesite, dacite, rhyolite, alkali rhyolite, trachybasalt, trachyandesite, trachyte, alkali trachyte, picrobasalt, basanite, tephrite, phonotephrite, tephriphonolite, phonolite and foidite. Using other simple parameters, trachybasalt may be further divided into the sub-root names of hawaiite and potassic trachybasalt, and trachyandesite may be further divided into the sub-root names of mugearite, shoshonite, benmoreite and latite. [N.C.N.S.]
Subjects:Chemical composition; Classification; Igneous rocks; Nomenclature; Petrology; Volcanic rocks; Total alkali silica diagram
Abstract Numbers:85M/0979
Record ID:1985026364
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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