前陆盆地层序地层学研究现状及进展

Current aspects of sequence stratigraphy of foreland basins

本文主要介绍了前陆盆地层序地层学的研究现状及急待解决的问题。前陆盆地层序地层学是将层序地层学的理论应用于构造活动区盆地分析的一个特例 ;前陆盆地二级构造层序代表了盆地不同成盆期的产物 ;前陆盆地的三级构造层序的成因并非受全球统一海平面变化控制 ,而与盆缘造山带的区域构造活动、盆内沉积作用和相对海平面变化的联合作用有关 ,是一个成盆期不同发育阶段的产物 ;前陆盆地地层的层序反映了前陆盆地构造演化史为一个多旋回的沉积 构造演化史。

The current aspects and unsolved problems about sequence stratigraphy of foreland basins are treated in this paper. The sequence stratigraphy of foreland basins may provide superb examples of applying the sequence stratigraphic theories to the basin analysis of tectonically active areas.The second order sequences in foreland basins represent the products formed during different phases of the formation of foreland basins whereas the third order sequences in foreland basins represent the products formed during different phases of the development of foreland basins, the latter of which are not constrained by global sea level changes but related to the combination of regional tectonism in peribasinal orogenic zones, intrabasinal deposition and relative sea level changes. The stratigraphic sequences in foreland basins have recorded a long and complex history of polycyclic sedimentary tectonic evolution.