John Goodge

Extending Mineralogy by Electron Microprobe Analysis part of Cutting Edge:Petrology:Teaching Examples
This lab is designed to be a highly interactive lab session for a petrology course, where instructors provide a minimal level of essential background and then the entire group works together to explore mineral chemistry.

Energy-dispersive detector (EDS) part of Integrating Research and Education:Geochemical Instrumentation and Analysis
John Goodge, University of Minnesota-Duluth Interaction of an electron beam with a sample target produces a variety of emissions, including x-rays. An energy-dispersive (EDS) detector is used to separate the ...

Back-scatter detector (BSE) part of Integrating Research and Education:Geochemical Instrumentation and Analysis
John Goodge, University of Minnesota at Duluth. Interaction of an accelerated electron beam with a sample target produces a variety of elastic and inelastic collisions between electrons and atoms within the ...

Element mapping part of Integrating Research and Education:Geochemical Instrumentation and Analysis
John Goodge, University of Minnesota-Duluth Element map of Mg zoning in garnet. Details An element map is an image showing the spatial distribution of elements in a sample. Because it is acquired from a polished ...