December 2019

 
growth zoning in volcanic rocks
Growth zoning analysis in volcanic rocks with EPMA

The analyzed Limburgite samples were extracted from the Kaiserstuhl, a range of hills (Germany), with a long volcanic history linked to the subsidence of the Rhine rift. Among the numerous igneous rocks released there during the Tertiary, limburgite presents numerous cm-sized clinopyroxene crystals. Mg, Fe, Si and Ti X-ray maps acquired at 15kV and 100nA reveal concentric growth zoning as well as hourglass shaped twinning.

Courtesy of Olivier Rouer, University of Lorraine, Nancy, France.



Olivier Rouer’s SX EPMA wishes all users of CAMECA instruments a happy holiday season!