我们发现的具有击象的黑云母产于安徽省东部早元古代变质沉积岩的糜棱岩中。黑云母击象中一组裂理平行于黑云母光轴面,裂理中细小包体主要为榍石。黑云母击象是脆性变形产物,它形成于以柔性变形为主的糜棱岩带中是由于构造过程中的应变硬化。作为冲击作用产物的黑云母击象产出于糜棱岩带内,这是由于强烈变形带中积累的能量有突然和缓慢释放的交替过程。目前对形成黑云母击象的精确温度、压力和应变速率仍是有待研究的问题。 We found that the biotite with the hit image was produced in mylonites of the Early Proterozoic metamorphic sedimentary rocks in the eastern part of Anhui Province. A group of cleavage in the black mica striking is parallel to the biotite optical axis, and the small inclusions in the cleavage are mainly limestone. The biotite image is a brittle deformation product, which is formed in the mylonite zone, which is dominated by soft deformation, due to strain hardening in the process of construction. The biotite image as an impact product is produced in the mylonite zone due to the sudden and slow release alternation of the energy accumulated in the intense deformation zone. The exact temperature, pressure and strain rate for the formation of biotite hitherto still remain a problem to be studied.