| 鲁西青邑韧性剪切带运动学涡度及剪切作用类型 |
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| 关键词:kinematic vorticity type of shear three-dimensional deformation Qingyi ductile shear zone |
| 基金项目:国家自然科学基金项目（编号：40102017）和原地质矿产部“1：5万田黄、土旺幅区域地质调查”项目 |
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| Kinematic Vorticities and Shear Types of the Qingyi Ductile Shear Zone in Western Shandong |
| The Qingyi ductile shear zone (QDSZ) developed in Late Archean is a large-size ductile shear zone in granite of the western Shandong Precambrian basement. The QDSZ trends NW-SE with nearly vertical foliation and subhorizontal lineation. The shear indicators and quartz c-axial fabrics in the zone imply dextral strike-shearing. Kinematic vorticity numbers in the QDSZ obtained through quartz C-axial fabrics analysis range from 0.96 to 0.99. Kinematic vorticity numbers given by polar Mohr constructions of mylonitic rocks, protomylonite, mylonite and ultramylonite are 0.91,0.87,0.81 and 0.60, respectively. Kinematic vorticity numbers show that the shear type of the QDSZ was at first a general shear, and the pure shear component gradually increased with deformation. Analyses of the shear type and the three-dimensional deformation demonstrate that the QDSZ belongs to a lengthening-broadening shear zone with the lengthening quite obvious along the Y-axis. This means that ductile shearing played a role of crust-thickening du-(ring) the cratonization at the end of Archean. |
| WANG Xin-she,ZHANG Shang-kun,ZHANG Fu-zhong,YANG Chong-hui.2005.Kinematic Vorticities and Shear Types of the Qingyi Ductile Shear Zone in Western Shandong[J].Acta Geoscientica Sinica,26(5):423-428. |
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