当前位置: X-MOL 学术Basin Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Strain migration during multiphase extension, Stord Basin, northern North Sea rift
Basin Research ( IF 2.8 ) Pub Date : 2020-11-11 , DOI: 10.1111/bre.12522
Hamed Fazlikhani 1, 2 , Synne S. Aagotnes 2, 3 , Marte A. Refvem 2, 4 , James Hamilton‐Wright 5, 6 , Rebecca E. Bell 5 , Haakon Fossen 2, 7 , Robert L. Gawthorpe 2 , Christopher A.‐L. Jackson 5 , Atle Rotevatn 2
Affiliation  

17 In multirifted regions, rift-related strain varies along and across the basin during and between each 18 extensional event, and the location of maximum extension often differs between rift phases. Despite 19 having a general understanding of multiphase rift kinematics, it remains unclear why some parts of 20 the rift are abandoned, with strain accumulating in previously less deformed areas, and how seismic 21 and sub-seismic scale pre-existing structures influence fault and basin geometries. We study the Stord 22 Basin, northern North Sea, a location characterized by strain migration between two rift episodes. To 23 reveal and quantify the kinematics, we interpreted a dense grid of 2D seismic reflection profiles, 24 produced time-structure and isochore maps, collected quantitative fault kinematic data and 25 calculated the amount of extension (β-factor). Our results show that the locations of basin-bounding 26 fault systems were controlled by pre-existing crustal-scale shear zones. Within the basin, rift faults 27 mainly developed at high angles to the Permo-Triassic Rift Phase 1 (RP1) E-W extension. Rift faults 28 control the locus of syn-RP1 deposition, whilst during the inter-rift stage, sedimentary processes (e.g. 29 areas of clastic wedge progradation) are more important in controlling sediment thickness trends. 30

中文翻译:

多相伸展过程中的应变迁移,Stord 盆地,北海裂谷北部

17 在多裂谷地区,在每个 18 伸展事件期间和之间,与裂谷相关的应变沿盆地和跨盆地变化,并且最大伸展的位置通常在裂谷阶段之间有所不同。尽管 19 对多相裂谷运动学有大致了解,但仍不清楚为什么 20 裂谷的某些部分被废弃,应变在以前变形较小的区域积累,以及地震 21 和亚地震规模的预先存在的结构如何影响断层和盆地几何形状。我们研究北海北部的 Stord 22 盆地,该盆地的特征是两个裂谷事件之间的应变迁移。为了揭示和量化运动学,我们解释了 23 个二维地震反射剖面的密集网格,24 个生成的时间结构和等距图,收集定量断层运动学数据和 25 计算扩展量(β-因子)。我们的结果表明,盆地边界的 26 个断层系统的位置受预先存在的地壳尺度剪切带的控制。在盆地内,裂谷断层 27 主要发育在与二叠纪-三叠纪裂谷第一期(RP1)EW 延伸的高角度处。裂谷断层 28 控制着 syn-RP1 沉积的位置,而在裂谷间阶段,沉积过程(例如 29 个碎屑楔进积区)在控制沉积物厚度趋势方面更为重要。30 裂谷断层 28 控制着 syn-RP1 沉积的位置,而在裂谷间阶段,沉积过程(例如 29 个碎屑楔进积区)在控制沉积厚度趋势方面更为重要。30 裂谷断层 28 控制着 syn-RP1 沉积的位置,而在裂谷间阶段,沉积过程(例如 29 个碎屑楔进积区)在控制沉积物厚度趋势方面更为重要。30
更新日期:2020-11-11
down
wechat
bug