August 2019

 
EPMA of fluid rock interaction
Electron Probe Microanalysis of fluid-rock interaction

Ultramafic rocks occurring at the seafloor are prone to interaction with infiltrating seawater. Intense fluid-rock interaction changes both the physical properties and the chemical composition of the oceanic crust producing a complex vein network. The image shows the Fe distribution in a rock sample from the Mid-Atlantic ridge (ODP Leg 209, Site 1270). By visualizing the element distributions, conclusions on the relative timing of metasomatic changes can be drawn.
Data acquired on CAMECA Electron Probe Microanalyzer at Ruhr-Universität Bochum (RUB), Germany.

Courtesy of Niels Jöns, Department of Geology, Mineralogy and Geophysics, Ruhr-Universität Bochum, Germany.