CAJ | 학술논문

选取横跨丽水凹陷的典型地震剖面，应用平衡剖面分析技术，计算了丽水凹陷新生代不同构造演化阶段的伸缩率。研究表明，丽水凹陷在新生代沉积过程中整体处于伸展状态。从时间演化上看，古新统月桂峰组、灵峰组沉积时期丽水凹陷处于强烈伸展期，且古新统灵峰组沉积时期的伸缩率总体大于月桂峰组；古新统明月峰组、始新统瓯江组和温州组沉积时期丽水凹陷总体伸缩率较小。从空间演化上看，丽水凹陷各演化阶段不同构造部位的伸缩率也存在一定的差异。同时，结合区域应力场特征，分析了丽水凹陷的构造演化过程。伸缩率的时空变化以及凹陷的构造演化过程是对东海陆架盆地发生、发展和演化过程的局部响应。
선취횡과려수요함적전형지진부면，응용평형부면분석기술，계산료려수요함신생대불동구조연화계단적신축솔。연구표명，려수요함재신생대침적과정중정체처우신전상태。종시간연화상간，고신통월계봉조、령봉조침적시기려수요함처우강렬신전기，차고신통령봉조침적시기적신축솔총체대우월계봉조；고신통명월봉조、시신통구강조화온주조침적시기려수요함총체신축솔교소。종공간연화상간，려수요함각연화계단불동구조부위적신축솔야존재일정적차이。동시，결합구역응력장특정，분석료려수요함적구조연화과정。신축솔적시공변화이급요함적구조연화과정시대동해륙가분지발생、발전화연화과정적국부향응。
Typical seismic sections of Lishui Sag were selected and analyzed using the balanced cross-section technique to calculate the rates of extension and compression that were applied to the sag in different tectonic evolutionary stages during the Cenozoic. The results show that Lishui Sag was in an overal extensional state during the Cenozoic. In terms of temporal evolution, the Paleocene Yueguifeng and Lingfeng formations were formed during a period of rapid extension, and the rates of extension and compression that were applied to the Lingfeng Formation were higher than those that were applied to the Yueguifeng Formation. Low rates of extension and compression were applied to the Paleocene Mingyuefeng Formation and to the Eocene Oujiang and Wenzhou formations. Besides these temporal variations, the rates of extension and compression varied spatially during each evolutionary stage. As well as quantifying the characteristics of the regional stress ifeld, the paper also analyzes the tectonic evolution of Lishui Sag. The temporal and spatial variations in the rates of extension and compression and the tectonic evolution of Lishui Sag represent the local response to the formation and development of the East China Sea shelf basin.