IUGS reclassification of the high-Mg and picritic volcanic rocks

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Authors:Le Bas, M. J.
Author Affiliations:Primary:
Southampton University, School of Ocean and Earth Science, Southampton, United Kingdom
Volume Title:Journal of Petrology
Source:Journal of Petrology, 41(10), p.1467-1470. Publisher: Oxford University Press, Oxford, United Kingdom. ISSN: 0022-3530
Publication Date:2000
Note:In English. 4 refs.; illus.
Summary:The 1989 International Union of Geological Sciences classification of high-Mg and picritic volcanic rocks has been revised. Instead of an 18 wt.% MgO minimum being applied for all high-Mg and picritic volcanic rocks, that value is now applicable only to the high-Mg rocks such as komatiite and meimechite. The minimum MgO for picrite is reduced to 12 wt.%. The SiO2 boundary value between boninite and komatiite-meimechite-picrite has been reduced from 53 to 52 wt.%, and the total alkali content for komatiite and meimechite is increased to 2 wt.% and for picrite to 3 wt.%. [B.E.L.]
Sections:Petrology
Subsections:Igneous petrology
Subjects:Alkaline earth metals; Associations; Classification; Geochemistry; Igneous rocks; IUGS; Komatiite; Lithogeochemistry; Magnesium; Meimechite; Metals; Picrite; Ultramafic composition; Volcanic rocks
Abstract Numbers:01M/2135
Record ID:2001005444
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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040 |a ViAlAGI  |c ViAlAGI 
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100 1 |a Le Bas, M. J.  |e analytic author  |u Southampton University, School of Ocean and Earth Science, Southampton 
245 1 0 |a IUGS reclassification of the high-Mg and picritic volcanic rocks 
300 |a p. 1467-1470 
500 |a In English. 4 refs. 
500 |a Abstract number: 01M/2135 
500 |a Abstractor: B.E.L. 
500 |a Category Section: Petrology 
500 |a Category Subsection: Igneous petrology 
500 |a Affiliation: Southampton University, School of Ocean and Earth Science; Southampton; GBR; United Kingdom 
500 |a Key title: Journal of Petrology 
500 |a Source note: Journal of Petrology, 41(10), p.1467-1470. Publisher: Oxford University Press, Oxford, United Kingdom. ISSN: 0022-3530 
500 |a Publication type: journal article 
504 |b 4 refs. 
510 3 |a GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom 
520 |a The 1989 International Union of Geological Sciences classification of high-Mg and picritic volcanic rocks has been revised. Instead of an 18 wt.% MgO minimum being applied for all high-Mg and picritic volcanic rocks, that value is now applicable only to the high-Mg rocks such as komatiite and meimechite. The minimum MgO for picrite is reduced to 12 wt.%. The SiO<2` boundary value between boninite and komatiite-meimechite-picrite has been reduced from 53 to 52 wt.%, and the total alkali content for komatiite and meimechite is increased to 2 wt.% and for picrite to 3 wt.%. 
650 7 |a Alkaline earth metals  |2 georeft 
650 7 |a Associations  |2 georeft 
650 7 |a Classification  |2 georeft 
650 7 |a Geochemistry  |2 georeft 
650 7 |a Igneous rocks  |2 georeft 
650 7 |a IUGS  |2 georeft 
650 7 |a Komatiite  |2 georeft 
650 7 |a Lithogeochemistry  |2 georeft 
650 7 |a Magnesium  |2 georeft 
650 7 |a Meimechite  |2 georeft 
650 7 |a Metals  |2 georeft 
650 7 |a Picrite  |2 georeft 
650 7 |a Ultramafic composition  |2 georeft 
650 7 |a Volcanic rocks  |2 georeft 
773 0 |t Journal of Petrology  |d Oxford : Oxford University Press, Oct. 2000  |x 0022-3530  |y JPTGAD  |n Journal of Petrology, 41(10), p.1467-1470. Publisher: Oxford University Press, Oxford, United Kingdom. ISSN: 0022-3530 Publication type: journal article  |g Vol. 41, no. 10  |h illus.