DOI: 10.1007/s00531-013-0947-8
论文题名: Kinematic evolution of thrusts wedge and erratic line length balancing: Insights from deformed sandbox models
作者: Ahmad M.I. ; Dubey A.K. ; Toscani G. ; Bonini L. ; Seno S.
刊名: International Journal of Earth Sciences
出版年: 2014
卷: 103, 期: 1 起始页码: 329
结束页码: 347
语种: 英语
英文关键词: Basement thickness
; Decollement dip
; Multiple decollement
; Northern Apennines fold-and-thrust belt
; Syntectonic sedimentation
Scopus关键词: analog model
; crustal shortening
; decollement
; deformation mechanism
; experimental study
; fold and thrust belt
; kinematics
; tectonic evolution
; thrust
; Apennines
; Italy
英文摘要: Kinematic evolution of fold-thrust structures has been investigated by analogue models that include syntectonic sedimentation. Different decollement dips and basement thicknesses produced different wedge geometries and propagating characteristics. A model with one decollement level was characterized by a closely spaced thrust system during early stages of shortening as compared to the late stages. The frequency of fault nucleation was rapid during the early stages of deformation. Conversely, the frequency of fault nucleation was low and thrust spacing was significantly wider in a model with two decollement levels. Individual faults became locked at steep dips and deformation stepped forward as a new fault nucleated in-sequence in front of the older locked structure. Once the thrust system was established up to 27 % overall shortening, an overlying bed was introduced to simulate syntectonic deformation. Model sand wedge did not grow self similarly but rather its length and height increased episodically with deformation. Restoration of deformed models show that layer parallel shortening accommodated for approximately half of the total model shortening across the multilayers. Calculated error in apparent layer shortening from the restored layers revealed a direct relation with depth of the layers in the models. The experimental results are comparable to a natural example from the Northern Apennines fold-and-thrust belts. © 2013 Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84893762516&doi=10.1007%2fs00531-013-0947-8&partnerID=40&md5=1c19d3b0d4415dcfa796ec2a4344e222
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70474
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: Wadia Institute of Himalayan Geology, 33-GMS Road, Dehradun, 248001, India; Dipartimento di Scienze della Terra e dell'Ambiente, Università di Pavia, Via Ferrata 1, 27100 Pavia, Italy
Recommended Citation:
Ahmad M.I.,Dubey A.K.,Toscani G.,et al. Kinematic evolution of thrusts wedge and erratic line length balancing: Insights from deformed sandbox models[J]. International Journal of Earth Sciences,2014-01-01,103(1)