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IUGS reclassification of the high-Mg and picritic volcanic rocks

IUGS reclassification of the high-Mg and picritic volcanic rocks
IUGS reclassification of the high-Mg and picritic volcanic rocks
The 1989 IUGS classification of the igneous rocks for the high-Mg and picritic volcanic rocks has been revised. Instead of an 18 wt % MgO minimum limit being applied for all high-Mg and picritic volcanic rocks, that is now applicable only to the high-Mg rocks such as komatiite and meimechite. The minimum MgO requirement for picrite is reduced to 12 wt %. The SiO2 former boundary figure between boninite and komatiite–meimechite–picrite, which was 53 wt %, is reduced to 52 wt %, and the total alkali content for komatiite and meimechite is increased to 2% and for picrite to 3%.
picrite, high-Mg, classification
0022-3530
1467-1470
Le Bas, M.J.
983cedef-8979-4757-a068-43eba648cd5f
Le Bas, M.J.
983cedef-8979-4757-a068-43eba648cd5f

Le Bas, M.J. (2000) IUGS reclassification of the high-Mg and picritic volcanic rocks. Journal of Petrology, 41 (10), 1467-1470.

Record type: Article

Abstract

The 1989 IUGS classification of the igneous rocks for the high-Mg and picritic volcanic rocks has been revised. Instead of an 18 wt % MgO minimum limit being applied for all high-Mg and picritic volcanic rocks, that is now applicable only to the high-Mg rocks such as komatiite and meimechite. The minimum MgO requirement for picrite is reduced to 12 wt %. The SiO2 former boundary figure between boninite and komatiite–meimechite–picrite, which was 53 wt %, is reduced to 52 wt %, and the total alkali content for komatiite and meimechite is increased to 2% and for picrite to 3%.

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More information

Published date: 2000
Keywords: picrite, high-Mg, classification

Identifiers

Local EPrints ID: 1299
URI: https://eprints.soton.ac.uk/id/eprint/1299
ISSN: 0022-3530
PURE UUID: 593d241c-0100-4faf-8797-6c5c388bacf2

Catalogue record

Date deposited: 15 Apr 2004
Last modified: 17 Jul 2017 17:17

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