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Early Cretaceous extension of the Yiwulushan metamorphic core complex
Alternative TitleEarly Cretaceous extension of the Yiwulushan metamorphic core complex
Li Gang1; Xu ZhongYuan1; Liu ZhengHong1; Li YongFei2; Li ShiChao1; Dong XiaoJie1
2013
Source PublicationACTA PETROLOGICA SINICA
ISSN1000-0569
Volume29Issue:3Pages:938-952
AbstractThe deformation and distribution of tectonites along the Waziyu detachment fault and ductile shear zone in the lower footwall are analyzed by detailed field observations and laboratorial analysis. Based on the analyses of macroscopic deformation, microstructure and lattice preferred orientation of quartzs, we make sure that the evolution of the Early Cretaceous extension has the transition from the brittle-ductile deformation in high-greenschist faces to brittle deformation in low-greenschist faces, which shows the uplifting from shallow crust to near-surface. Analysizing the evolutionary processes of the Early Cretaceous extension combine the Ar-40/Ar-39 isotope ages of muscovites and other chronological dating in the ductile shear zone with characteristics of strata in the superposed extensional basin. The results support that the extension occurred at 132 similar to 117Ma and the deformation intensity was weakened gradually, moreover, the active period was longer in the north than in the south. The shear motion sense in the Yiwulushan area and the movement of the Pacific Plate and the Izanagi Plate in the different Mesozoic periods suggest the Mesozoic extension of the Yiwulushan area were controlled by the drifting of plates in the Western Pacific.
KeywordNORTH CHINA CRATON WESTERN LIAONING PROVINCE DUCTILE SHEAR ZONES TECTONIC IMPLICATIONS LIAODONG PENINSULA VOLCANIC-ROCKS NE CHINA CONSTRAINTS DEFORMATION QUARTZ Metamorphic core complex Detachment fault Electron Backscatter Diffraction (EBSD) Ar-40/Ar-39 Yiwulushan
Indexed ByCSCD
Language英语
CSCD IDCSCD:4851849
Citation statistics
Cited Times:6[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/151375
Collection中国科学院金属研究所
Affiliation1.吉林大学
2.中国科学院金属研究所
Recommended Citation
GB/T 7714
Li Gang,Xu ZhongYuan,Liu ZhengHong,et al. Early Cretaceous extension of the Yiwulushan metamorphic core complex[J]. ACTA PETROLOGICA SINICA,2013,29(3):938-952.
APA Li Gang,Xu ZhongYuan,Liu ZhengHong,Li YongFei,Li ShiChao,&Dong XiaoJie.(2013).Early Cretaceous extension of the Yiwulushan metamorphic core complex.ACTA PETROLOGICA SINICA,29(3),938-952.
MLA Li Gang,et al."Early Cretaceous extension of the Yiwulushan metamorphic core complex".ACTA PETROLOGICA SINICA 29.3(2013):938-952.
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