摘要
拉张状态下方解石组构多星环带到，递进变形状态下才可能出现点极密．因为当分解剪应力达最大值时，含有众多方解石颗粒的岩石中，形成ｅ双晶滑动最有利的方位不可能是唯一的，而是不同方位的滑动系在三维空间中的组合，并且ｅ双晶极点和光轴各自构成古钟型。由于系同一应力作用下的产物，二钟型体的顶角大小不同，但彼此共轴，均平行主任应力方向，属共轴叠钟体。该叠钟体记录了岩石变形时的应力状态，未再变形之前，该组构为初始组构。岩石的递进变形过程，实际是初始组构的递进变形过程，最后形成定型组构．岩石递进变形的全过程，就是初始组构到定型组构的全过程．
he figure of Calcite fabric showed circular belt-shape when rock bore pulling stress.Then it was point maximum shape when stress continued. This is the resut of progressive de formation in rocks. Primitive rock fabric recorded the stress state. It was changable and now rock fabric was produced in the process of progressive deformation. Then they were fixed in rocks. Studying rock fabric can understand the deformation history of geological body. On the basis of calcitee--bicrystal. this paper wicl show the deformation history of extensional faults in the northern Chaoxian, Anhui.
出处
《西北地质科学》
1995年第2期23-28,共6页
Northwest Geoscience
