C-slip in quartz from subsolidus deformed granite
C-slip in quartz from subsolidus deformed granite
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DOI：
10.1016/0040-1951(86)90081-8
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发表时间：
1986-07
期刊：
影响因子：
2.9
通讯作者：
P. Blumenfeld;D. Mainprice;J. Bouchez
中科院分区：
文献类型：
--
作者：
P. Blumenfeld;D. Mainprice;J. Bouchez
通过晶格择优取向 (LPO) 和微观结构技术研究了在亚固相线高温条件 (700°–800° C) 变形过程中石英从花岗岩和花岗石脉中的滑移行为。在光学和电子显微镜的帮助下，以[C]作为塑性变形过程中的主要滑移方向，呈现并解释了具有与剪切方向平行的[C]轴最大点的LPO，该方向接近拉伸线状。这些样品的显微镜检查揭示了边缘方向上存在(0001)倾斜边界和自由[0001]伯格斯矢量位错。在温度降低的环境中LPO从平行于剪切方向的[C]轴到垂直于剪切方向的[C]轴的变化证明了织物从罕见的[C]滑移织物转变为更常见的滑移织物。结论是，在地质应变率变形过程中，需要高温和水分压的条件来引发主要的[C]滑移。
The slip behaviour of quartz from a granite and granitic veins during subsolidus high temperature conditions (700°–800° C) of deformation is studied by lattice preferred orientation (LPO) and microstructural techniques. LPOs with a point maximum of [C] axes parallel to the shear direction, which is close to the stretching lineation, are presented and interpreted with the aid of light and electron microscopy in terms of [C] as the dominant slip direction during plastic deformation. Microscopy of such samples reveals the presence of (0001) tilt boundaries and free [0001] Burgers vector dislocations in edge orientations. A change in LPO in a decreasing temperature environment from [C] axes parallel to the shear direction to [C] axes normal to the shear direction documents a fabric transition from the rare [C] slip to the more common< a> slip fabric. It is concluded that conditions of high temperature and partial pressure of water are required to initiate dominant [C] slip during deformation at geological strain rates.