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instrumental techniques applied to mineralogy and geochemistry

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Electron backscatter diffraction (EBSD) in the SEM: applications <strong>to</strong> microstructures in<br />

minerals <strong>and</strong> rocks <strong>and</strong> recent technological advancements<br />

17<br />

FIGURE 4. a), b), c), d) <strong>and</strong> e) Omhpacite in Streaked Eclogite <strong>and</strong> f), g), h) <strong>and</strong> i) omphacite fan<br />

in undeformed eclogite, Colle della Barme d’Oropa, Sesia-Lanzo Zone, NW Italy. The Streaked<br />

Eclogite has a strong foliation defined by shape (omphacite <strong>and</strong> muscovite grains) <strong>and</strong> location<br />

(alternating b<strong>and</strong>s of garnet <strong>and</strong> omphacite, plus quartz <strong>and</strong> muscovite) fabrics. Lineation is<br />

defined by quartz. Omphacite fans show large misorientations (up <strong>to</strong> 60°) across them (h). Pole<br />

figures show one single misorientation axes for the sub-grain boundaries (e <strong>and</strong> i). Only subtle<br />

chemical changes are observed (b <strong>and</strong> f).

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