气候变化领域集成服务门户(CCPortal): Evidence of rift segmentation and controls of Middle to late jurassic synrift deposition in the ryggsteinen ridge area; Northern North Sea

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DOI	10.1306/03172018173
	Evidence of rift segmentation and controls of Middle to late jurassic synrift deposition in the ryggsteinen ridge area; Northern North Sea
	Zhong X.; Escalona A.
发表日期	2020
ISSN	0149-1423
起始页码	1531
结束页码	1565
卷号	104 期号:7
英文摘要	Multiple episodes of rifting and preexisting structure reactivation may result in rift segmentation, which is a fundamental factor in deformation variability and sediment dispersal. To understand the structural framework and basin evolution in segmented rift systems, this study addresses an integrated structural and stratigraphic analysis of the Middle-Upper Jurassic sequences in the northern North Sea. Four major fault systems were active during the Jurassic oblique rifting: (1) east-northeast-striking synthetic shear faults along preexisting Caledonian structures, which developed into basin-wide transfer fault zones and induced first-order rift segmentation. Each rift segment shows independent deformation; (2) north-south-striking reactivated Permian-Triassic faults, which uplifted the footwall developing major structural highs; (3) southwest-northeast-striking normal faults; and (4) northwest-southeast-striking antithetic shear (oblique-slip) faults, which caused internal deformation and induced second-order rift segmentation within rift segments. Rift segmentation led to stepovers from the Viking graben to the Sogn graben. The entry of regional drainages was determined by first-order rift segmentation. Prior to segmentation (Bathonian-Callovian), drainage shows a northeast-southwest line-source nature, and facies changes are quite homogenous. During the Oxfordian-Kimmeridgian, segmentation took place and modified the drainage system into a point source. Facies show a large spectrum of variability from shallow-marine to deep-water turbidites over short distances. Furthermore, drainage routes were influenced by second-order rift segmentation. West-directed drainages deflected toward the northwest by adapting to gradient surfaces established by oblique-slip faults. As such, the structural and stratigraphic expressions in this study provide an example of synrift deposition controlled by different orders of rift segmentation. © 2020. The American Association of Petroleum Geologists. All rights reserved.
语种	英语
scopus关键词	Deformation; Stratigraphy; Basin evolution; Drainage systems; Gradient surfaces; Internal deformation; Sediment dispersal; Stratigraphic analysis; Structural frameworks; Transfer faults; Deposition; basin evolution; deformation; episodic event; fault plane; fault zone; footwall; Jurassic; rift zone; rifting; sedimentation; segmentation; shear stress; Atlantic Ocean; North Sea
来源期刊	AAPG Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/143690
作者单位	Department of Energy Resources, University of Stavanger, Stavanger, Norway
推荐引用方式 GB/T 7714	Zhong X.,Escalona A.. Evidence of rift segmentation and controls of Middle to late jurassic synrift deposition in the ryggsteinen ridge area; Northern North Sea[J],2020,104(7).
APA	Zhong X.,&Escalona A..(2020).Evidence of rift segmentation and controls of Middle to late jurassic synrift deposition in the ryggsteinen ridge area; Northern North Sea.AAPG Bulletin,104(7).
MLA	Zhong X.,et al."Evidence of rift segmentation and controls of Middle to late jurassic synrift deposition in the ryggsteinen ridge area; Northern North Sea".AAPG Bulletin 104.7(2020).