Late Permian (Zechstein) rifting in the Netherlands; models and implications for petroleum geology
Late Permian (Zechstein) rifting in the Netherlands; models and implications for petroleum geology
复制标题
荷兰晚二叠世（Zechstein）裂谷；
作者：
M. Geluk
荷兰的多学科研究揭示了晚二叠纪晚期瓦里斯坎伸展断层的两个新阶段。本文提议将其命名为“Tubantian I”和“Tubantian II”。图班田一号运动是由硬石膏在差异化基底上的快速沉积和负载以及温和的东西向延伸所引发的。一系列小型拉断盆地和倾斜断块形成，瓦里西亚前缘发生局部塌陷。随后浮雕被 Z1 (Werra) 地层的碳酸盐和蒸发岩填充。断层运动在 Z2（斯塔斯福特）地层沉积之前停止。图班蒂安二号运动引起了隆起和侵蚀，特别是在荷兰南部陆上。与此同时，荷兰西南近海地区和邻近的英国地区沉积了砂质侵蚀产物，盆地中部沉积了普拉亚型岩盐和粘土岩。三个特征对油气勘探具有重要意义：上 Rotliegend 沉积后不久，断层/倾角闭合结构的早期形成；流体流动系统的重组和同期砂质沉积物的沉积。
Multidisciplinary studies in the Netherlands have revealed two new phases of late Variscan extensional faulting during the Late Permian. The names Tubantian I and II are proposed in this paper. Tubantian I movements were triggered by rapid deposition and loading of anhydrite upon a differentiated basement, in combination with mild E-W extension. A series of small pull-apart basins and tilted fault blocks formed and local collapse occurred of the Variscan Front. The relief was subsequently filled with carbonates and evaporites of the Z1 (Werra) Formation. Fault movements stopped prior to deposition of the Z2 (Stassfurt) Formation. Tubantian II movements caused uplift and erosion, especially in the southern onshore Netherlands. Contemporaneously, sandy erosional products were deposited in the southwestern offshore area of the Netherlands and the adjacent UK sector and playa-type halites and claystones accumulated in the central parts of the basin. Three features have implications for hydrocarbon exploration: the early formation of fault/dip closed structures shortly after deposition of the Upper Rotliegend; the reorganization of the fluid-flow system and the deposition of contemporaneous sandy deposits.