气候变化领域集成服务门户(CCPortal): How the energy budget scales from the laboratory to the crust in accretionary wedges

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DOI	10.1016/j.epsl.2020.116276
	How the energy budget scales from the laboratory to the crust in accretionary wedges
	McBeck J.; Cooke M.; Renard F.
发表日期	2020
ISSN	0012821X
卷号	541
英文摘要	We investigate the scaling properties of the mechanical energy budget in accretionary prisms across five orders of magnitude, from the laboratory centimeter-scale to crustal kilometer-scale. We first develop numerical models that match the length scale, fault and material properties, surface topography, and fault geometries observed in scaled dry sand accretionary experiments. As we systematically increase the spatial dimensions of the numerical models by orders of magnitude, we calculate each component of the energy budget both before and after the first thrust fault pair develops. The increase of both the bulk stiffness and slip weakening distance from the laboratory- to crustal-scale produces a scale-invariant partitioning of the energy budget, relative to the total work done on the system. The components scale as power laws with exponents of three. Consequently, accurate laboratory simulations of the energetics of deformation within crustal accretionary wedges require careful scaling of the stiffness and slip weakening distance. Preceding thrust fault development at both the laboratory and crustal scale, the internal work consumes the largest portion of the budget (67-77%) and frictional work consumes the next largest portion (17-27%). Following thrusting, frictional work and internal work consume similar portions of the energy budget (38-50%). The sum of the remaining energy budget components, including gravitational work, seismic work, and the work of fracture propagation, consume <10-15% of the total energy budget preceding and following thrust fault development. © 2020
关键词	accretionary prisms energy budget physical analog experiments scaling
英文关键词	Faulting; Friction; Laboratories; Numerical models; Stiffness; Topography; Accretionary prism; Accretionary wedge; Laboratory simulation; Mechanical energies; Orders of magnitude; Remaining energies; Scaling properties; Slip weakening distance; Budget control; accretionary prism; computer simulation; crustal deformation; crustal structure; deformation mechanism; energy budget; experimental study; laboratory method; numerical model; power law; sand; stiffness; thrust fault
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202775
作者单位	Physics of Geological Processes, The Njord Centre, Department of Geosciences, University of Oslo, Norway; Department of Geosciences, University of Massachusetts AmherstMA, United States; University Grenoble Alpes, University Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, Grenoble, 38000, France
推荐引用方式 GB/T 7714	McBeck J.,Cooke M.,Renard F.. How the energy budget scales from the laboratory to the crust in accretionary wedges[J],2020,541.
APA	McBeck J.,Cooke M.,&Renard F..(2020).How the energy budget scales from the laboratory to the crust in accretionary wedges.Earth and Planetary Science Letters,541.
MLA	McBeck J.,et al."How the energy budget scales from the laboratory to the crust in accretionary wedges".Earth and Planetary Science Letters 541(2020).