泰山地区太古宙末韧性剪切作用在陆壳演化中的意义

详细信息

The implication of terminal Archean ductile shearing in continental crustal evolution of the Taishan Mountain region

摘要: 泰山地区北西向韧性剪切作用发生在构造体制从韧塑性变形向脆性变形转化的太古宙末期，属于中高温变形环境条件下的剪切变形。剪切带中岩石结构构造解析和化学成分变异等比线研究表明，岩石的物理变化贯穿韧性剪切作用的始终，化学变化仅发生在糜棱岩化阶段。韧性剪切变形在地壳演化中具有加厚陆壳的作用，是陆壳克拉通化的标志性构造事件
Abstract: NW trending ductile shearing in the Taishan area took place at the end of the Archean, when the tectonic system transformed from ductile plastic deformation to brittle deformation.It belonged to medium high temperature shearing deformation.The characteristics of microstructure and petrochemical composition isocon diagrams of deformed rocks in the shear zone show that the physical changes of the rocks ran through the deformation process while the petrochemical changes only took place in the stage of mylonization . The ductile shearing played an important role in crustal thickening and was a symbolic tectonic event in the cratonization.
- Taishan area /
- NW trending ductile shearing /
- crustal thickening