初糜棱岩
岩石发生糜棱岩化的初级阶段产物，具糜棱结构。碎斑粒径较大，多呈不规则状、眼球状或透镜状，趋于定向排列。基质占10%～50%，动态重结晶颗粒逐渐增多。碎斑中可见脆性破裂及各种具塑性或半塑性变形特征的显微构造，如长石双晶扭折、云母褶曲、方解石的机械e双晶、石英的波状消光及扭折带等。石英中还常发育核幔构造。基质往往被定向拉长，如石英被拉长呈丝带状绕碎斑分布。有些眼球状初糜棱岩具有SC面理组构。
93
Alias
Contributor
contributed at 2011-10-11
Classification(s)
●
Earth System(in Chinese) Igneous petrology
Detailed Description
| English |
|---|
| Name | protomylonite |
| Chinese |
|---|
| Name | 初糜棱岩 |
| Description | 岩石发生糜棱岩化的初级阶段产物，具糜棱结构。碎斑粒径较大，多呈不规则状、眼球状或透镜状，趋于定向排列。基质占10%～50%，动态重结晶颗粒逐渐增多。碎斑中可见脆性破裂及各种具塑性或半塑性变形特征的显微构造，如长石双晶扭折、云母褶曲、方解石的机械e双晶、石英的波状消光及扭折带等。石英中还常发育核幔构造。基质往往被定向拉长，如石英被拉长呈丝带状绕碎斑分布。有些眼球状初糜棱岩具有SC面理组构。 |
How to Cite
NNU_Group (2011). 初糜棱岩, Concept & Semantic, OpenGMS,
https://geomodeling.njnu.edu.cn/repository/concept/01e01cf9-fb6a-49bb-b80c-28c5874e84e5
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