Numerical modelling of lithosphere evolution in the North China Block: Thermal versus tectonic thinning

Ge, Lin; Zhang, Y.; Guo, Feng; Wang, Yuejun; Wu, Fan

doi:10.1016/j.jog.2005.07.011

Cited by 22 publications

(9 citation statements)

References 51 publications

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“…Their material parameters are shown in Table . The internal friction angles and cohesion values used in our models are consistent with those from both rock mechanics experiments (Ord, ; Schellart, ; Zhang et al, ) and numerical modeling studies (Lavier et al, ; Li & Liu, ; Lin et al, ; Liu et al, ; Luo & Liu, , ; Popov & Sobolev, ). We simulated the heterogeneous stress states on natural faults by perturbing the cohesion values of a randomly selected 10% of the fault elements by ±1 MPa (Table ).…”

Section: The Finite Element Modelsupporting

confidence: 83%

Seismicity, Fault Slip Rates, and Fault Interactions in a Fault System

2020

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Seismicity and the partitioning of slip rates in interacting and mechanically coupled fault systems are poorly understood. We developed and used three‐dimensional viscoelastoplastic finite element models to simulate earthquakes, earthquake cycles, and synthetic seismicity in single and bifurcated fault systems and investigate seismicity, fault slip rates, and interactions and mechanical coupling between faults in fault systems. The modeled interseismic velocities and coseismic displacements are consistent with those from analytical and quasi‐analytical solutions. We found that the modeled frequency‐magnitude relation satisfies the Gutenberg‐Richter relation and the b value is inversely related to differential stress. We observed that the seismicity on two parallel faults is often interdependent and complementary: high seismic moment release rates on a fault are usually accompanied by low ones on the other fault and vice versa; the two faults collectively accommodate far‐field tectonic loading and crustal relative motion. Model results showed that when two parallel faults have the same or similar strength, they have similar seismicity and long‐term slip rates, but when one of the two faults has lower strength, it has more active seismicity and a faster slip rate than the other; the sum of their slip rates equals the far‐field crustal relative motion in both cases. The results in this study provide scientific insights into the spatiotemporal migration of seismicity and partitioning of fault slip rates in an interacting and mechanically coupled fault system and help to qualify b values and to evaluate the earthquake hazard and risk on each of the faults in such a system.

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Section: The Finite Element Modelsupporting

confidence: 83%

Seismicity, Fault Slip Rates, and Fault Interactions in a Fault System

2020

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“…Schaubs et al, 2006;Zhang et al, 2008; this study), thermal transport and deformation (e.g. Lin et al, 2005), thermal transport and fluid flow (e.g. Garven et al, 2001;Yang et al, 2004), or thermal transportfluid flow-chemical reaction processes (e.g.…”

Section: Discussionmentioning

confidence: 93%

Numerical modelling of structural controls on fluid flow and mineralization

Zhang

Robinson

Schaubs

2011

Geoscience Frontiers

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This paper presents the results of a set of numerical models focussing on structural controls on hydrothermal mineralization. We first give an overview of natural phenomena of structurally-controlled ore formation and the background theory and mechanisms for such controls. We then provide the results of a group of simple 2D numerical models validated through comparison with Cu-vein structure observed near the Shilu Copper deposit (Yangchun, Guangdong Province, China) and finally a case study of 3D numerical modelling applied to the Hodgkinson Province in North Queensland (Australia). Two modelling approaches, discrete deformation modelling and continuum coupled deformation and fluid flow modelling, are involved. The 2D model-derived patterns are remarkably consistent with the Cu-vein structure from the Shilu Copper deposit, and show that both modelling approaches can realistically simulate the mechanical behaviours of shear and dilatant fractures. The continuum coupled deformation and fluid flow model indicates that pattern of the Cuveins near the Shilu deposit is the result of shear strain localization, development of dilation and fluid focussing into the dilatant fracture segments. The 3D case-study models (with deformation and fluid flow coupling) on the Hodgkinson Province generated a number of potential gold mineralization targets. ª 2011, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. All rights reserved.

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“…On the other hand, late Jurassic intra-continental Yanshanian Orogen and the early Cretaceous post-orogenic extension triggered the destruction the NC (Dong et al, 2007;Hou et al, 2009). The North China Basin with a lithospheric thickness of ∼80 km was the largest area of destruction (Hou et al, 1998(Hou et al, , 2003(Hou et al, , 2006(Hou et al, , 2009Lin et al, 2005). Our modeling results and geological evidence of the Mesozoic stress fields of NC suggest that the late Jurassic is the key transmission period of the tectonic regime of the NC from the Paleo-Asian Ocean to the Pacific Ocean, initiating the destruction of the NC craton.…”

Section: Implications For Tectonic Transmissionmentioning

confidence: 99%