摘要
【意义】源—汇系统研究是当今沉积地质学关注热点,其重建对理解区域构造、气候、海(湖)平面升降、物源供给、搬运通道和分散系统及其相互关系与规模性砂体预测均具有重要作用。【进展】源—汇系统可以根据时间尺度、成因机制、级次等要素进行分类,其主要研究内容包括物源体系、搬运通道及沉积体系研究。研究方法主要涉及碎屑矿物年代学定量示踪、源区地貌重建与定量古地貌分析、地貌比例关系分析、沉积物通量定量估算和地层正演模拟综合表征等;源—汇系统要素之间存在定量的收支平衡关系,基于收支平衡模型可预测砂体规模和有利储层分布。沙垒田地区源—汇系统研究表明,均一母岩组成与边界条件约束下汇水高差和汇水面积较大以及地形坡度较陡通常对应形成规模和厚度较大的扇体。【结论与展望】未来源—汇系统研究应加强基于盆地类型和成因的源—汇系统类型和级次划分,加强源—汇系统参数定量研究,不断提高深时源—汇系统要素表征精度,建立具有预测功能的深时源—汇系统要素耦合模型,有效预测砂体时空分布,不断实现多学科与多方法交叉融合,建立具有中国区域地质特色的源—汇系统模型。
[Significance]Source-to-sink study is a current focal point in sedimentary geology.The reconstruction of source-to-sink systems plays a crucial role in understanding regional tectonics,climate,sea(or lake)level fluctua-tion,provenance supply,transport pathways and dispersal systems,together with their interrelationships,and the prediction of the presence of large-scale sand bodies.[Progress]The key elements in classifying source-to-sink sys-tems include temporal scale,formation mechanism and hierarchy.The primary research area concerns provenance sys-tem,transport pathway and sedimentary system,and research methods mainly include detrital mineral geochronology for quantitative tracing,reconstruction and quantitative analysis of source area geomorphology,analysis of geomor-phic scaling relationships,quantitative estimation of sediment flux,and overall characterization based on stratigraph-ic forward modeling.There are quantitative sediment-budget relationships between different components of the source-to-sink system that can be used to predict the dimensional scale of sand bodies and the distribution of favorable reser-voirs.The source-to-sink study of the Shaleitian area indicates that larger catchment relief,larger drainage area,and steeper topography are typically favorable for forming larger and thicker fan bodies.[Conclusions and Prospects]To advance future source-to-sink system studies,it is essential to strengthen the classification of the type and hierarchy of the source-to-sink system based on the type and origin of the basin.This enhances quantitative analysis of source-to-sink parameters and continually improves the precision of the interpretation of the deep-time elements.It is also necessary to build predictive coupled models of these systems to enable effective prediction of the spatiotemporal dis-tribution of sand bodies.It is important to continually achieve cross-disciplinary and multi-method integration,and to establish source-to-sink models related to the distinctive regional geological feature
作者
朱筱敏
刘强虎
谈明轩
李顺利
陈贺贺
聂银兰
ZHU XiaoMin;LIU QiangHu;TAN MingXuan;LI ShunLi;CHEN HeHe;NIE YinLan(College of Geosciences,China University of Petroleum(Beijing),Beijing 102249,China;School of Earth Resources,China University of Geosciences(Wuhan),Wuhan 430070,China;College of Oceanography,Hohai University,Nanjing 210098,China;School of Energy Resources,China University of Geosciences(Beijing),Beijing 100083,China;School of Ocean Sciences,China University of Geosciences(Beijing),Beijing 100083,China)
出处
《沉积学报》
CAS
CSCD
北大核心
2023年第6期1781-1797,共17页
Acta Sedimentologica Sinica
基金
国家自然科学基金项目(42272110)。
关键词
深时源—汇系统
分类和要素表征
耦合关系模型
沙垒田凸起
发展趋势
deep-time source-to-sink system
classification and element characterization
coupled model
Shaleitian uplift
development tendency
