Sequence stratigraphic and depositional framework of the Cenozoic fill, Central and Northern North Sea Basin
Sequence stratigraphic and depositional framework of the Cenozoic fill, Central and Northern North Sea Basin
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北海盆地中部和北部新生代充填层序地层和沉积格架
DOI：
10.1144/0040033
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
B. Sloan
中科院分区：
文献类型：
--
作者：
W. Galloway;J. Garber;Xijin Liu;B. Sloan
北海盆地中部和北方的后大宁期至中新世碎屑充填物由四个构造层序组成，它们记录了盆地及邻近物源区的区域构造演化。构造层序又包含至少15个沉积幕期间沉积的地层，从而形成一系列以浓缩剖面和/或侵蚀面为界的地层层序。古新世构造层序记录了六个沉积幕，并由断层运动与物源区隆升耦合而启动。莫琳和安德鲁事件的近端三角洲馈电潜艇围裙随后被四十年代/多尔诺赫编织三角洲系统所取代。广泛的源区和盆地边缘沉降终止了古新世的区域洪水和沉积的巴尔德浓缩部分。残余陆棚边缘的大量消耗使古新世沉积物局部再沉积为浊积岩和滑塌岩瓣。始新世构造层序开始于Frigg沉积幕。陡峭的陆架坡度和高海洋能量通量的组合绕过陆架沉积物到达维京海盗海槽。随后，四个陆架扩张事件终止于脉冲式的最新始新世陆架边缘退超，这是由逐步的相对海平面下降驱动的。渐新世和中新世构造层序包括四个盆地充填期。沉积在陆架和深海环境中的沉积物越来越多地被地转流改造，最终沿着盆地轴积累了大量中新世等深流漂积物。
The post-Danian through Miocene clastic fill of the Central and Northern North Sea Basin consists of four tectonosequences that record the regional structural evolution of the basin and adjacent source areas. The tectonosequences, in turn, contain strata deposited during at least 15 depositional episodes, creating a series of stratigraphic sequences bounded by condensed sections and/or erosion surfaces. The Paleocene tectonosequence records six depositional episodes and was initiated by fault movement coupled with source area uplift. Proximal delta-fed submarine aprons of the Maureen and Andrew episodes were subsequently overridden by the Forties/Dornoch braid-delta system. Widespread source area and basin-margin foundering terminated the Paleocene with regional flooding and deposition of the Balder condensed section. Mass wasting of the relict shelf margins locally redeposited Paleocene sediments as turbidite and slump lobes. The Eocene tectonosequence began with the Frigg depositional episode. A combination of steep shelf gradient and high marine energy flux bypassed shelf sediment to the Viking trough. Subsequently four shelf progradational episodes terminated with pulsed latest Eocene shelf-margin offlap driven by stepwise relative sea-level fall. Oligocene and Miocene tectonosequences encompass four eposides of basin filling. Sediments deposited in shelf and deep-marine settings were increasingly reworked by geostrophic currents, culminating in accumulation of large Miocene contourite drift complexes along the basin axis.