Crystal zoning as an archive for magma evolution
Crystal zoning as an archive for magma evolution (in Frontiers in textural and microgeochemical analysis, Dougal A. Jerram (editor) and Jon P. Davidson (editor))
Elements (August 2007) 3 (4): 261-266
Spatial compositional variations in magmatic minerals record chemical and physical changes in the magma from which they grew. Electron-beam techniques allow high-resolution imaging and quantitative analysis of this compositional archive for major, minor and some trace elements. In this way, magmatic processes such as crystallization, recharge in a magma chamber, decompression during ascent, and convection in the magma chamber can be identified and the history of magmatic systems prior to eruption reconstructed.