The system enstatite-nepheline in experiments at 6.5-13.5 GPa: The importance of Na2Mg2Si2O7 for the melting of nepheline-normative mantle

Authors
Litvin, VY Gasparik, T Litvin, YA
Citation
Vy. Litvin et al., The system enstatite-nepheline in experiments at 6.5-13.5 GPa: The importance of Na2Mg2Si2O7 for the melting of nepheline-normative mantle, GEOCHEM INT, 38, 2000, pp. S100-S107
Citations number
6
Categorie Soggetti
Earth Sciences
Journal title
GEOCHEMISTRY INTERNATIONAL
ISSN journal
00167029 → ACNP
Volume
38
Year of publication
2000
Supplement
1
Pages
S100 - S107
Database
ISI
SICI code
0016-7029(2000)38:<S100:TSEIEA>2.0.ZU;2-C
Abstract
Phase relations were experimentally studied at 6.5 GPa in the system enscat ite-nepheline, which is a pseudobinary inner section of the system forsteri te-nepheline-SiO2. Forsterite and jadeite form in the low-temperature subso lidus region (up to 1500 degreesC). Under high temperature subsolidus condi tions (up to 1600 degreesC), forsterite reacts with jadeite forming Na2Mg2S i2O7 (NMS-phase), pyrope, and enstatitc.