论地质历史中区域构造沉降史与海平面变化

History of Regional Tectonic Subsidence and Sea Level Changes in Geological History

区域构造沉降史和海平面变化是层序地层学中起决定作用的两个主参数。运用“反剥法”。（ｂａｃｋｓｔｒｉｐｐｉｎｇ）建立了研究区内泥盆纪至三叠纪盆地构造沉降地球动力学曲线模型，识别出盆地演化从被动大陆边缘、成熟被动大陆边缘、周缘前陆盆地到后造山前陆盆地的演化序列。同时，运用沉积体系域、地震及碳氧同位素信息反演编制了二叠—三叠纪海平面变化轨迹曲线，研究区内海平面变化与全球海平面升降具同步效应，至晚三叠世研究区海平面变化表现为上升趋势，而全球海平面变化总体处于海平面下降阶段，这与前陆挠曲变形和造山俯冲有关。

The history of regional tectonic subsidence and sea level changes are two major factors of four factors in sequence stratigraphy.The dynamic model of tectonic subsidence curves from the Devonian to the Triassic in the study area has been reconstructed by the approach of back stripping.The evolution succession of the basin ,which is from the passive continental margin,mature passive continental margin ,peripheral foreland basin to post orogeny foreland basin ,is identified.At the same time ,the curves of sea level changes in the Permian and Triassic have been inversed by the information of sedimentary systems tract, seismic section and isotope of carbon and oxygen.The sea level changes in the study area are in synchronism with the global sea level changes.The period of sea level rising in the study area lasts to Changxingian Age of Late Permian and the time of sea level falling is Dalong Age of Late Permian.The sea level changes of Late Triassic in the study area are rising and the global sea level chenges is mainly in falling stage.It is relative to the orogenic overthrusting.