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
1467-1470
Le Bas, M.J.
983cedef-8979-4757-a068-43eba648cd5f
2000
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), .
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%.
This record has no associated files available for download.
More information
Published date: 2000
Keywords:
picrite, high-Mg, classification
Identifiers
Local EPrints ID: 1299
URI: http://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: 27 Apr 2022 11:07
Export record
Contributors
Author:
M.J. Le Bas
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics