| 1 | Role of Water in Deformed Omphacite in UHP Eclogite from the Dabie Mountains,Eastern China显示文摘Omphacite grains from UHP eclogite of the Dabie Mountains in eastern China are elongated and showstrong lattice preferred orientations (LPOs). Observations by the transmission electron microscopy (TEM) identified notonly structures of plastic deformation occurring as free dislocation, dislocation loops and dislocation walls, but alsobubbles of water present in the deformed omphacite. The bubbles attach to the dislocation loops which are often connectedto one another via a common bubble. Using infrared spectroscopy (IR), two types of hydrous components are identified ashydroxyl and free-water in the omphacite. An analysis of deformation mechanism of microstructure in omphacite suggeststhat the mineral deformed plastically under UHP metamorphic conditions by dislocation creep through hydrolitic weakening. | SUWen YOUZhendong CONGBolin YEKai | 2003 | Acta Geologica Sinica(English Edition)2003，77，3： | 5 |
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