A Water-Rich Glass Flow from the Mesoproterozoic Mackenzie Large Igneous Province

Journal of Petrology 2026 Open access

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Authors: James M D Day, Patricia L. Clay, Francis M. Mccubbin, Brian O’Driscoll, J. S. Gee, Ryan S. Jakubek, L. Hulbert
DOI: 10.1093/petrology/egag026
Cited by: 0
References: 82

Abstract

Abstract The ~1.27 Ga Mackenzie large igneous province is one of the largest preserved singular magmatic events in Earth history. It also hosts one of the most unusual glass flows (CM19) recognized, within the September Creek member of the Coppermine River flood basalt succession. The glass flow is dominantly composed of dacite glass (71 ± 2 modal%) containing up to 15 wt % H2O, with plagioclase (~15 modal%; An56–78), Mg-rich pyroxene (~12 modal%; orthopyroxene = En75Wo3, clinopyroxene = En46Wo37) and Cr-spinel (0.2 to 0.4 modal%), along with

Fields of Study & Subjects

Geological and Geochemical Analysis Geological Studies and Exploration Geochemistry and Elemental Analysis

Publication details

Journal / source
Journal of Petrology
Volume
67
Issue
3
Publication date
1 March 2026
Language
EN