The purpose of this assignment is for students to synthesize field observations, petrography, and whole-rock chemical analyses in order to investigate chemical differentiation processes in a basaltic magma chamber. The students first complete a petrography lab on both hand samples and thin sections that represent a complete stratigraphic section through sill at Fort Lee, NJ. I then provide them with major- and trace-element data and a table of distribution coefficients for common phases that would be crystallizing from basaltic magma. I then ask them to discuss the chemical differentiation of the sill by writing up a 1-2 page interpretative summary based on their petrographic observations and the chemical data.


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    Elements,NSDL,Chemistry,Geology,Undergraduate (Upper Division),Undergraduate (Lower Division),Igneous Processes,Higher Education,Geochemistry,oai:nsdl.org:2200/20100502200744566T,Vocational/Professional Development Education,Geochemical Analysis,Geoscience,NSDL_SetSpec_380601



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