DOI: 10.1007/s00531-013-0911-7
Scopus记录号: 2-s2.0-84885918278
论文题名: Paleostress pattern and salt tectonics within a developing foreland basin (north-western Subhercynian Basin, northern Germany)
作者: Brandes C. ; Schmidt C. ; Tanner D.C. ; Winsemann J.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2013
卷: 102, 期: 8 起始页码: 2239
结束页码: 2254
语种: 英语
英文关键词: 3D subsurface model
; Paleostress field
; Salt diapir
; Salt pillow
; Structural restoration
; Subhercynian basin
Scopus关键词: basin evolution
; basin fill
; deformation
; detachment fold
; diapir
; foreland basin
; Jurassic-Cretaceous boundary
; paleostress
; salt tectonics
; sedimentary basin
; structural geology
; three-dimensional modeling
; Germany
; Ulmus
英文摘要: Analysing the paleostress field in sedimentary basins is important for understanding tectonic processes and the planning of drilling campaigns. The Subhercynian Basin of northern Germany is a perfect natural laboratory to study the paleostress field in a developing foreland basin. The simple layer-cake geometry of the basin-fill is dominated by several piercing and non-piercing salt structures. We derived the paleostress field from the orientation of fracture sets, faults, slickensides and stylolites. On a regional scale, the basin-fill is characterized by a horizontal compressional paleostress vector that is mainly NNE-SSW-oriented, which reflects the Late Cretaceous inversion phase in Central Europe. We show that the local paleostress field is distinctly perturbated due to the salt structures. Along the edge of the salt pillows, the maximum horizontal paleostress vector is deflected by up to 90° from the regional trend. In the case of the Elm salt pillow, it forms a radial pattern. Restoration of balanced cross-sections demonstrates at least 9 % of the shortening of the north-western part of the Subhercynian Basin was achieved by folding. The salt structures in the north-western Subhercynian Basin are the result of varying stress conditions. Initial extension in the Triassic caused first salt movements that prevailed during the Jurassic and Early Cretaceous. Most important is the Late Cretaceous contractional phase that shortened the diapirs and led to the formation of the salt pillows between diapirs due to detachment folding. We derive four main controlling factors for such salt-dominated contractional basins: (1) the wedge-shape basin-fill is the product of the dynamic load at the southern margin of the basin, (2) a basal salt layer fed the diapirs and acted as a detachment horizon during the later shortening, (3) detachment folding was the dominating deformation mechanism during contraction, and (4) the pre-existing diapirs controlled the position of the detachment folds. © 2013 Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84885918278&doi=10.1007%2fs00531-013-0911-7&partnerID=40&md5=7cf60d2ba14c51538001504d5f4a5118
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70489
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Institut für Geologie, Leibniz Universität Hannover, Callinstraße, 30167 Hannover, Germany; Leibniz Institute for Applied Geophysics (LIAG), Stilleweg 2, Hannover, Germany
Recommended Citation:
Brandes C.,Schmidt C.,Tanner D.C.,et al. Paleostress pattern and salt tectonics within a developing foreland basin (north-western Subhercynian Basin, northern Germany)[J]. International Journal of Earth Sciences,2013-01-01,102(8)