One-atmosphere melting experiments have been performed on two shoshonitic basalts; SO-1 and SO-20; (14 and 9 wt.% MgO, respectively) and an olivine nephelinite HF-13 (11 wt.% MgO), at different oxygen fugacities (NNO+1, NNO, and FMQ), with temperature varying from super-liquidus (1300$ sp circ$C) to near-solidus (1075$ sp circ$C) conditions. The experimental results reveal that iron-oxide crystallization depends strongly on oxygen fugacity, and that their precipitation drives residual liquids towards silica enrichment. Residual liquids obtained from SO-1 and SO-20 reached a maximum of 64 wt.% SiO$ sb2$ for olivine, clinopyroxene, plagioclase and iron-oxide saturated melts at NNO+1, and 59 wt.% SiO$ sb2$ for olivine, clinopyroxene and plagioclase saturated melts at FMQ. The experimental liquids produced from HF-13 reached a maximum of 48 wt.% SiO$ sb2$ at NNO and NNO+1 for iron-oxide, olivine and clinopyroxene saturated melts, however no variation in SiO$ sb2$ concentration was observed for olivine and clinopyroxene-saturated melts at FMQ.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.26658 |
| Date | January 1996 |
| Creators | Guernina, Souad. |
| Contributors | Baker, Don R. (advisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science (Department of Earth and Planetary Sciences.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001619091, proquestno: MQ37124, Theses scanned by UMI/ProQuest. |
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