望湘花岗岩高温高压流变实验
来源期刊：中南大学学报(自然科学版)1999年第3期
论文作者：张曾荣 何绍勋 奚小双
文章页码：4 - 7
关键词：高温高压;变形实验;流变学;望湘花岗岩
Key words：high temperature and pressure; experimental deformation; rheology; Wangxiang granite
摘 要：采用固体围压高温高压三轴变形实验装 置，对望湘花岗岩作了不同温度、压力下的固态流变实验；变形试样作了光学显微镜和TEM分析．实验温度350～950℃，围压60～420MPa，应变速 率10－６ｓ－１．试样在较低温度压力下表现为脆性破裂；在较高温度压力下出现脆性—韧性过渡状态．望湘花岗岩中长石、石英和黑云母有不同的变形构造和流 变性质．
Abstract: The experimental deformation of Wangxiang granite has been made in a solid pressure medium apparatus with uniaxial compression at t =350～950 ℃, pc=60～420 MPa and strain rate 10-6 s-1 . Petrographic and transmission electron microscope (TEM) observations are made of the specimens. At low temperature and pressure, the samples are cataclasted by brittle microcracking. At high temperature and pressure, a state of brittle-ductile transition occurs. The feldspar, quartz and biotite possess different rheological properties and microstructures.
