HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Science / Faculty of Science >
Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy >
Vol.XX, Nos.2-3 >

Phase Relations in the Chromium-Poor Part of the System Diopside-Anorthite-Forsterite-MgCr2O4 in Air at 1 atm

Files in This Item:
20_2-3_p171-183.pdf2.16 MBPDFView/Open
Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/36715

Title: Phase Relations in the Chromium-Poor Part of the System Diopside-Anorthite-Forsterite-MgCr2O4 in Air at 1 atm
Authors: Onuma, Kosuke Browse this author
Issue Date: Feb-1983
Publisher: 北海道大学
Journal Title: 北海道大学理学部紀要
Journal Title(alt): Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy
Volume: 20
Issue: 2-3
Start Page: 171
End Page: 183
Abstract: The effect of chromium on the silicate system was studied at 1 atm by adding MgCr2O4 to the join diopside-anorthite-forsterite which is a thermal divide in the system CaO-MgO-Al2O3-SiO2. When a small amount of MgCr2O4 (0.2 - 0.5 wt%) is added to the join, the liquidus surface for spinel expands at the expense of anorthite. Thus, the assemblage diopside + forsterite + anorthite + liquid at a ternary invariant point becomes unstable and the assemblages of diopside + anorthite + spinel + liquid and diopside + forsterite + spinel + liquids appear on the liquidus surface. The points at which these assemblages are present are not "invariant" point but "piercing" point, indicating that the join diopside-anorthite-forsterite with a small amount of chromium is not thermal divide, and that the residual liquid in the crystallization can move through the join diopside-anorthite-forsterite.
Type: bulletin (article)
URI: http://hdl.handle.net/2115/36715
Appears in Collections:Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy > Vol.XX, Nos.2-3

Export metadata:

OAI-PMH ( junii2 , jpcoar )


 

Feedback - Hokkaido University