This exercise, based on a suite of rocks from the contact metamorphic aureole of the Alta stock near Salt Lake City, Utah, is constructed for a mid to upper level undergraduate petrology course and does not require access to rocks and thin sections. It assumes students have already had a course in mineralogy and are familiar with photomicrographs, plotting mineral compositions on ternary diagrams, the phase rule, and Schreinemaker's rules. Some of these concepts (e.g., Schreinemaker's rules) could be introduced as part of this activity. Students who complete this exercise should be able to identify mineral assemblages common to metamorphosed siliceous dolostones, determine appropriate chemical systems to describe and plot minerals, infer metamorphic reactions from progressive changes in mineral assemblages, identify metamorphic reactions responsible for producing isograds mapped in the field, understand how rock and fluid compositions control mineral assemblages, and infer the temperature and fluid composition evolution of the Alta stock aureole based on T-X(CO2)diagrams.


    Education Levels:

    • Grade 1
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    • Grade 3
    • Grade 4
    • Grade 5
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    • Grade 11
    • Grade 12


    Higher Education,NSDL_SetSpec_380601,oai:nsdl.org:2200/20100502200639564T,Metamorphic Rock Suites and Facies,Undergraduate (Upper Division),Undergraduate (Lower Division),Vocational/Professional Development Education,Thermodynamics and Phase Equilibria,Metamorphic Processes,NSDL



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