层序地层学四分模型的非周期性与层序边界调整  

Adjustment to Non-Periodicity and Sequence Boundary in Four-Divided Model of Sequence Stratigraphy

作　　者：李绍虎[1,2] 贾丽春 

机构地区：[1]中国地质大学(武汉)资源学院,武汉430074 [2]中国地质大学(武汉)构造与油气资源教育部重点实验室,武汉430074 [3]山西省第三地质工程勘察院,山西榆次030600

出　　处：《沉积学报》2011年第1期105-117,共13页Acta Sedimentologica Sinica

摘　　要：通过图解证明现行四分层序地层模式存在的岸线迹线非周期性问题,表现为垂向升降1周期对应侧向迁移1+1/6周期,是由于高位正常海退设定不合理所致,建议废除高位正常海退及其形成的高位体系域,重新解释高位体系域。沉积层序边界调整为残留最大水泛面RMFS及其相对应的地面不整合面CSU,由此构成沉积层序自下而上包括下降期体系域、低位体系域、海侵体系域,亦即FSST—LST—TST叠置。此外,此研究基于废除高位正常海退对沉积层序、成因层序、R—T层序边界进行统一,避免成因层序和T—R层序跨越两个沉积层序。Based on illustrating chrono-sequence framework,this article has proved the existence of non-periodicity of shoreline trajectory within four-divided model in current sequence stratigraphy,presenting one vertical periodicity corresponding to one and one-sixth of lateral periodicities due to the unreasonably assigned highstand normal regression.Authors of this article suggest that the terms of highstand normal regression（HNR） and previous highstand systems tract HST formed during HNR should be abolished or re-interpreted.Depositional sequence has been adjusted as bounded by remnant maximum flooding surfaces（RMFS） and their correlative subaerial unconformities（CSU）,and is composed of falling stage,lowstand,transgressive systems tracts upwards,i.e.,FSST-LST-TST superposition.At the same time,this paper has united the boundaries between depositional sequence,genetic sequence and R-T sequence on the basis of abolishing highstand normal regression and previously assigned highstand systems tract to avoid that genetic sequence and T-R sequence span two depositional sequences.

关 键 词：层序地层学 残留最大水泛面 对应的不整合面 废除高位正常海退 R-T层序 

分 类 号：P539.2[天文地球—古生物学与地层学]