典型文献
Numerical modeling of metamorphic core complex formation:Implications for the destruction of the North China Craton
文献摘要：
Widespread magmatism, metamorphic core complexes (MCCs), and significant lithospheric thinning occurred during the Mesozoic in the North China Craton (NCC). It has been suggested that the coeval exhumation of MCCs with uniform northwest-southeast shear senses and magmatism probably resulted from a decratonization event during the retreat of the paleo-Pacific Plate. Here we used two-dimensional finite element thermomechanical numerical models to investigate critical parameters controlling the formation of MCCs under far-field extensional stress. We observed three end-member deformation modes: the MCC mode, the symmetric-dome mode, and the pure-shear mode. The MCC mode requires a Moho temperature of ≥700 °C and an extensional strain rate of ≥5 × 10?16 s?1, implying that the lithosphere had already thinned when the MCC was formed in the Mesozoic. Considering that the widespread MCCs have the same northwest-southeast extension direction in the NCC, we suggest that the MCCs are surface expressions of both large-scale extension and craton destruction and that rollback of the paleo-Pacific slab might be the common driving force.
文献关键词：
中图分类号：
作者姓名：
ZiQi Ma;Gang Lu;JianFeng Yang;Liang Zhao
作者机构：
State Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049,China
文献出处：
引用格式：
[1]ZiQi Ma;Gang Lu;JianFeng Yang;Liang Zhao-.Numerical modeling of metamorphic core complex formation:Implications for the destruction of the North China Craton)[J].地球与行星物理（英文）,2022(02):191-203
A类：
decratonization
B类：
Numerical,modeling,metamorphic,core,Implications,destruction,North,China,Craton,Widespread,magmatism,complexes,MCCs,significant,lithospheric,thinning,occurred,during,Mesozoic,NCC,It,has,been,suggested,that,coeval,exhumation,uniform,northwest,southeast,shear,senses,probably,resulted,from,event,retreat,paleo,Pacific,Plate,Here,used,two,dimensional,finite,element,thermomechanical,numerical,models,investigate,critical,parameters,controlling,under,far,field,extensional,stress,We,observed,three,end,member,deformation,modes,symmetric,dome,pure,requires,Moho,temperature,strain,rate,implying,lithosphere,had,already,thinned,when,was,formed,Considering,widespread,have,same,direction,are,surface,expressions,both,large,scale,rollback,slab,might,common,driving,force
AB值：
0.609012
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