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Investigation into the petrogenesis of Apollo 14 high-alumina basalts through textural and compositional analysis

thesis
posted on 2009-04-16, 00:00 authored by Jocelyn Grace Oshrin
The crystal size distributions (CSD) and major and trace element compositions of plagioclase crystals in Apollo 14 high-alumina basalts were measured in order to constrain the processes that affected the magma during crystallization. Results of the textural analysis suggest that high-Al volcanism became increasingly voluminous over time. Petrogenetic modeling of Group A basalts suggest that the magma formed from a parental composition with higher Sr and Ba abundances than suggested by whole rock analysis, and that plagioclase rim compositions could contain late stage melt inclusions, or could indicate possible open-system AFC processes. Petrogenetic modeling of Group B and Group C basalts suggest that the r-values fluctuated during their petrogeneses. Furthermore, most Group C equilibrium melt compositions fall beyond the FC and AFC trajectories, suggesting incorporation of an assimilant with lower Ba and higher Sr than suggested by whole rock studies.

History

Date Modified

2017-06-05

Research Director(s)

Clive R. Neal

Committee Members

Jeremy Fein Tony Simonetti

Degree

  • Master of Science in Geological Sciences

Degree Level

  • Master's Thesis

Language

  • English

Alternate Identifier

etd-04162009-132513

Publisher

University of Notre Dame

Program Name

  • Civil Engineering and Geological Sciences

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