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沉积物补给问题涉及到一系列的状态变量,这些状态变量又对地表坡度产生影响。对于整个沉积物补给和沉积物的结构(砾石、砂、泥质的比率)而言,其空间和时间上的变化都会引起沉积和侵蚀格局的改变,这可能产生或影响盆地的层序地层格架。我们对北海盆地i 6个成因地层层序分别进行了层序颗粒体积的定量测定。所谓层序颗粒体积也就是某一地层层序中的沉积物颗粒体积(即总层序体积减去胶结物的体积和孔隙体积)。通过计算求出盆地在时间和空间上总沉积物补给的速率。每个层序的砂岩颗粒体积及砂泥比也可以计算出来。这些数据可将第三系沉积物补给划分为4个主要阶段。最重要的阶段发生在晚古新世,位于其后的足始新世和渐新世的2个次要阶段。第4阶段即从新第三纪一直持续到现在。所有这几个阶段都与物源区构造脉动相关联,而构造脉动则与北大西洋盆地的演化有关、与伴随着阿尔卑斯连续造山运动的板内应力变化有关或者与斯堪的纳维亚新生代后期的造陆上升有关。同样,主要阶段包括次级层序间的变化,这些变化与个或2个补给状态变量随时间或空间值的变化相对应。而且,大部分变化都准确反映了主要构造阶段的细节。物源区地形起伏的变化史、所形成的地形坡度及盆地中沉积量的相关变化是北海盆地新生代层序发育的主要控制因素。补给盆地的地形起伏主要是由区域性构造作用决定的。
Sediment supply involves a series of state variables, which in turn have an impact on the slope of the earth’s surface. For the entire sediment supply and sediment structure (gravel, sand, shale ratio), its spatial and temporal changes will lead to sedimentary and erosion patterns change, which may produce or affect the basin sequence stratigraphy frame. We have carried on the quantitative determination of the sequence particle volume in the sequence of 6 genesis strata in North Sea basin. The so-called sequence particle volume is also the sediment particle volume (ie, the total sequence volume minus the volume and pore volume of cement) in a sequence of stratigraphy. The total deposition rate of the basin in time and space is obtained by calculation. Sandstone particle volume and sand / clay ratio can also be calculated for each sequence. These data divide the Tertiary sediment supply into four main stages. The most important stage occurred in the Late Paleocene, followed by two minor stages of the Eocene and Oligocene. The fourth stage from the Neogene to the present. All of these stages are related to the rifting of the provenance zone, and the structural pulsations are related to the evolution of the North Atlantic basin, to the intraplate stress change associated with the continuous orogeny of the Alps, or to the Scandinavian Cenozoic The late rise of land-related. Similarly, the major phases include changes in the sub-sequence that correspond to changes in one or two supply state variables with time or space values. Moreover, most of the changes accurately reflect the details of the main construction phase. The change of terrain undulation in the provenance area, the change of terrain slope and the change of sediments in the basin are the main controlling factors for the development of the Cenozoic sequence in the North Sea basin. The topography of the recharge basin is mainly determined by the regional tectonics.