层序地层学与源-汇系统理论内在关联性与差异性

Sequence stratigraphy and source-to-sink system:Connections and distinctions

层序地层学与源-汇系统理论方法体系不仅先进而且得到广泛应用,深入探讨二者内在关联与差异性对地学相关学科、领域协同发展意义重大。层序地层学核心在于建立沉积区高精度等时地层格架,揭示格架内沉积充填过程、时空分布序列及成因机制;而源-汇系统分析,进一步将研究范畴向搬运区、物源区拓展,从多维度示踪沉积物剥蚀、搬运和堆积的动态响应过程,进而综合厘定沉积物从源到汇全过程的动力驱动机制、原型格局。层序地层学与源-汇系统间内在关联性和继承性集中于盆地等时地层格架内剥蚀-沉积响应过程表征解析及沉积体定量化预测;差异性主要体现为刻画表征关键要素与层序内幕单元结构两方面。未来层序地层学和源-汇系统方法体系有望在应用标准化、古今结合及多学科和多参数定量化分析预测等方面得到快速发展。

Both the sequence stratigraphy and source-to-sink system are modern geoscience disciplines with theories and methodologies being widely applied and employed.However,the connections and distinctions between the two have not been discussed thoroughly for a better discipline integration and synergy.The sequence stratigraphy is focused on establishing high-resolution isochronous stratigraphic frameworks for sinks and trying to reveal their sedimentary filling processes,temporal-spatial distribution patterns and genetic mechanisms.While the source-to-sink theory expands further to transport areas and provenances,tracing the dynamic responses of denudation,transport,and accumulation of sediments in multiple dimensions,and determining the driving mechanisms and prototype patterns of sediment partition from source to sink.The internal connections between the two disciplines are reflected mostly through the analysis of denudation-sedimentation response and quantitative prediction of sedimentary bodies in isochronous stratigraphic frameworks,while their distinctions are mainly illustrated during the description of different key elements and structures of inner sequence units.Judging by the current development trends,we could expect a rapid development of the methodology systems of the two disciplines in respects of standardization of their application,combination of ancient and modern data,and quantitative analyses and prediction through multi-disciplinary and multi-parameter integration.