A numerical approach to boundary layer fractionation: application to differentiation in natural magma systems
Article Abstract:
A mathematical model explaining the fractionation in boundary layer crystallization within magma chambers was constructed using constraints based on trace element composition and phase equilibria. The model factors in the effects of low-calcium pyroxene, oxides and apatite as well as olivine, augite and plagioclase on the process. The model can assist in explaining various phenomena associated with crystallization such as variation in the ratios of incompatible elements, 'phantom crystallization' and the decoupling of systematics for major and trace elements.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1992
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Melt inclusions in high-An plagioclase from the Gorda Ridge: an example of the local diversity of MORB parent magmas
Article Abstract:
The melt inclusions in high-An plagioclase from the Gorda Ridge show a range of high Ca-Al MORB magmas. These primitive basaltic melts are trapped liquids which are the precursors of the Gorda Ridge lavas. The composition of major elements in the inclusions is relatively constant while the composition of minor elements vary highly. The array of magmas is skewed towards the more depleted compositions. The results of re-homogenization analysis of inclusions at fixed temperature do not follow a calculated olivine-plagioclase cotectic.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1995
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Local and regional variation of MORB parent magmas: evidence from melt inclusions from the Endeavour Segment of the Juan de Fuca Ridge
Article Abstract:
Mid-ocean ridge basalt (MORB) magmas from the axial and west valleys of the Endeavor Segment, Juan de Fuca Ridge, were selected for study due to their exhibited relationship of enriched lavas (E-MORB) and incompatible element enriched depleted lavas (N-MORB). Under trace element investigation, the melt inclusions were found to contain heavy concentrations of Sr, Ni and Cr. These elements are believed to have reacted with the melts and lava in the upper mantle and lower crust.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1999
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