论文部分内容阅读
为揭示岩石中石英晶体之间的结晶学取向关系,采用光学显微镜和电子背散射衍射(EBSD)技术对大别山朱家冲二云母石英片岩进行研究。结果显示石英普遍发育双晶,其中道芬双晶律产出的概率最高(57.8%),日本律(3.2%)、Esterel(3.2%)、Breithaupt(4.8%)、Cornish(2.4%)等双晶律均有少量产出。除双晶外,相邻石英之间多为交生关系。各单形交生的相对概率为:{11■1}>{11■2}>{11■0}>{20■1}>{10■0}>{10■1}>{10■2}>{00■1}。无结晶学取向关系的概率相对较低(7%)。石英具较强的择优取向,其C轴组构表现为靠近Z轴的简单点极密。石英变形机制以底面滑移为主,变形温度约350℃~550℃。
To reveal the crystallographic orientation relationship between quartz crystals in the rock, optical microscopy and electron backscatter diffraction (EBSD) techniques were used to study the mica-quartz schist from Zhujiachu, Dabie Mountains. The results show that quartz has a wide range of twins, including the highest (57.8%) and the other (3.2%), Breithaupt (4.8%) and Cornish There are a small amount of crystal law output. In addition to dual crystal, mostly between adjacent quartz inter-symbiotic relationship. The relative probabilities of each single birth are: {11 ■ 1}> {11 ■ 2}> {11 ■ 0}> {20 ■ 1}> {10 ■ 0}> {10 ■ 1}> {10 ■ 2 }> {00 ■ 1}. The probability of non-crystallographic orientation is relatively low (7%). Quartz with a strong preferred orientation, the C-axis structure appears close to the Z axis of the simple point very dense. Quartz deformation mechanism to the bottom slip-based deformation temperature of about 350 ℃ ~ 550 ℃.