【摘要】 对郯庐断裂带南段左旋走滑韧性剪切带中糜棱岩的K-Ar全岩分析结果研究表明,该剪切带形成后,在99±2Ma前(早白垩世末期)冷却至封闭温度。结合其它地质现象,笔者认为郯庐断裂带大规模左行平移发生在早白垩世末期,推测为110—130Ma前。这一平移时代与太平洋的伊泽奈崎(Izanagi)板块向欧亚大陆斜向俯冲的时间基本一致。更多还原

【Abstract】 K-Ar whole-rock analysis of mylonites from a sinistral strike-slip ductile shear zone in the southern part of the Tan-Lu fault zone suggests that after its formation the shear zone cooled to the closure temperature 99±2 Ma ago Cat the end of the Early Cretaceous). Considering other geological evidence, the authors propose that large-scale sinistral strike-slip movement of the Tan-Lu fault zone took place in the terminal Early Cretaceous, presumably between 110-130 Ma ago. This large-scale strike-slip movement is roughly simultaneous with oblique subduction of the Izanagi Plate in the Pacific beneath the Eurasian Plate.更多还原