UMass Geosciences Link
image 8

Monazite from Western Gneiss Region, Norway.

Th element map (left) and calculated age map (right). Sample is from UHP terrane. Core age is ca.1050 Ma, and rim is ca. 405 Ma. by EPMA, corresponding to the maximum depth (~125km) of the UHP unit . SHRIMP analyses cluster at 1050 Ma and 415 Ma. This grain is approximately 150 microns in width.

For more information about this image contact: Mike Terry