郯庐断裂带经过长期的研究,取得许多成果,但在年代学上还存在严重的分歧及缺乏严格定时的证据,尤以确定走滑剪切运动的时限争纷更甚。走滑剪切运动是一个非瞬间又非均匀的过程。依据作者近年内进行的专门工作及现有的各种材料,从地质年代学及同位素年代学两方面研究成果的分析。郯庐断裂带在晚侏罗世末期(140Ma左右)开始产生剪切破裂井大规模左行平移,直至早白垩世晚期(110Ma左右)又有一次重要的走滑剪切运动。左行走滑运动延续约30Ma。随后郯庐断裂带进入以伸展为主的构造运动。从始新世中期(45Ma左右),它又转化为多次受挤压兼小幅度右滑的运动。 t"tNtLI
【英文摘要】 Many results have been achieved after long-peried studies in the Tan-Lu fault zone. But, serious controversyremains in geochronology of the fault zone, and reliable timing evidence,especially for strike-slip movement of the faultzone,is still rare,Strike-slip movement is a neither abrupt process nor uniform process. On the basis of our recent stud-ies and other work in geological chronology and isotopic chronology of the fault zone,it is concluded that shear fracturesand large-scale sinistra strike-slip mov... }-dF+m:
【基金】 国家自然科学基金 E}t-N