The fluid inclusions in jadeitite from Pharkant area, Myanmar

A lot of liquid-gas and liquid-gas-solid inclusions were found in Pharkant jadeitites, northwestern Myanmar and their characteristics, geological sett ing and porphyroclastic jadeites with inclusions in them were described in detail. The results analyzed by Raman spectrometer showed that the componen t of liquid-gas phase and solid phase (daughter minerals) in fluid inclusio ns is H2O + CH4 and jadeite separately. The results indicated that Pharkant jadeitites were crystallized from H2O + CH4 bearing jadeitic melt which ma y originate from mantle. The P-T conditions in which the jadeitites were cr ystallized were speculated to be T > 650 degreesC, P >1.5 GPa.