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Quantitative conditions for the development of systems tracts

机译:系统开发的定量条件

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Systems tracts are defined on the basis of stratal stacking patterns. This paper explores quantitatively the possible relationships between different systems tracts and the relative sea-level in siliciclastic depositional systems. The development of systems tracts depends on the manifestation of forced regressions, normal regressions (lowstand and highstand) and transgressions, irrespective of the magnitudes of relative sea-level rise preceding and succeeding a stage of relative fall. As such, the transgressive and highstand systems tracts of one sequence may form when the elevation of the relative sea level is lower than the highstand or even lowstand in relative sea level of the previous sequence. Similarly, the lowstand systems tract of one sequence may form when the relative sea-level is higher than the highstand elevation of the previous sequence. Because subsidence/uplift and depositional rate may change considerably along strike of the coastal zone, all the systems tracts may form synchronously along strike. The maximum diachroneity of a systems tract boundary along the coast is half the duration of the accommodation cycle.
机译:系统层是根据地层堆积模式定义的。本文定量研究了硅质碎屑沉积系统中不同系统区域与相对海平面之间的可能关系。系统域的发展取决于强迫回归,正态回归(低水位和高水位)和海侵的表现,而与相对下降阶段之前和之后的相对海平面上升幅度无关。这样,当相对海平面的高度低于先前序列的相对海平面的高海拔或什至低海拔时,可能形成一个序列的海侵系统和高空系统。类似地,当相对海平面高于前一个序列的高位海拔时,可能会形成一个序列的低位系统道。由于沿海岸带的走向,沉降/隆升和沉积速率可能会发生很大变化,因此所有系统域可能会沿着走向同步形成。沿海岸的系统区域边界的最大双错性是调节周期的一半。

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