In order to identify the character of the source rocks, we
conducted microprobe analysis on garnet, amphibole, pyroxene,
epidote, rutile and Cr-spinels. Heavy minerals for the
microprobe analysis were handpicked under the microscope.
Microprobe analysis was carried out with a CAMEBAX
Microprobe analyzer using the wavelength dispersive method,
15 kV acceleration potential, and a beam current of 12 nA at
the Mineralogical Institute, Bonn University, Germany