In northern Gohung granitic gneiss, porphyroblastic gneiss and migmatitic gneiss are widely distributed.
Gneisses were plotted in granodiorite domain on an IUGS silica-alkali diagram. The amounts of trace elements (Li, Zn,
Sc, Sr, Ni, V, Y, etc.) vs. ...
In northern Gohung granitic gneiss, porphyroblastic gneiss and migmatitic gneiss are widely distributed.
Gneisses were plotted in granodiorite domain on an IUGS silica-alkali diagram. The amounts of trace elements (Li, Zn,
Sc, Sr, Ni, V, Y, etc.) vs. SiO2 somewhat decreased. Plagioclase showed a wide compositional range (An32-48). Xalm and
Xsps were higher in garnet rim and Xpyp in garnet core. The rocks in the study area were formed from S and I-type
magmas which generated from syn-collision and the late to post-orogenic tectonic environment. Metamorphic P-T
conditions were low to medium pressure, high temperature (803-913oC, 6.1-7.3 kb) and overprinted by retrograde
metamorphism (570-726oC, 2.2-5.1 kb) and chloritization.