Host: The Japanese Association of Mineralogists, Petrologists and Economic Geologists
One of the fundamental problems concerning the ultrahigh pressure metamorphic rocks worldwide is the mechanism of uplift. In addition, it is important to clarify whether the rocks experienced partial melting at the peak-pressure or subsequent decompression stages, because sufficiently high temperatures have been estimated for most of them to melt partially in the presence of water. We examined plagioclase which occurs with or without epidote and muscovite around kyanite next to quartz in some ultrahigh pressure metamorphic rocks from the Sulu-Dabie belt, eastern China, in some detail. It is plausible that the plagioclase formed by partial melting of host rocks and subsequent crystallization of the produced melt during uplift.
