Extrusion tectonics inferred from fabric study of the Guanzizhen ophiolitic mélange belt in the West Qinling orogen, Central China

Liang, Wei; Zhang, Guowei; Lu, Rukui; Nantasin, Prayath

doi:10.1016/j.jseaes.2013.07.006

Cited by 10 publications

(3 citation statements)

References 86 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Extrusion (escape) tectonics, the most important mechanism to accommodate the intensive shortening and strain induced by orogeny in terms of strike‐slip movement (Tapponnier et al, ), may explain the coeval completely opposite kinematics in the West and East Qinling (Figure b). Previous studies have proposed that the Qinling Orogen is a zone of long‐lived shortening with multistage extrusion events (Li et al, ; Liang, Zhang, Lu, & Nantasin, ; Wang, Meng, Burchfiel, & Zhang, ). Continuous convergence between the NCB and SCB during Late Triassic time resulted in opposite kinematic senses separated by the narrower segment of the Qinling Orogen.…”

Section: Discussionmentioning

confidence: 99%

“…The same distinction of kinematics along the Shangdan belt can be inferred from this study. Structural study of the SGSZ reveals a sinistral shear sense (221–201 Ma) in East Qinling, while the coeval deformation (227 Ma) is dextral kinematics in West Qinling (Li, ; Liang et al, ). Therefore, we propose that bilateral extrusion (escape) tectonics, separated by the narrower segment, were developed in the Qinling Orogen in response to the Late Triassic orogeny between the NCB and SCB (Figure b).…”

Section: Discussionmentioning

confidence: 99%

“…Orogen is a zone of long-lived shortening with multistage extrusion events Liang, Zhang, Lu, & Nantasin, 2013;Wang, Meng, Burchfiel, & Zhang, 2003). Continuous convergence between the NCB and SCB during Late Triassic time resulted in opposite kinematic senses separated by the narrower segment of the Qinling Orogen.…”

Section: Syntectonic Emplacement and Deformation Of The Baliping Plmentioning

confidence: 99%

See 2 more Smart Citations

Tectonic setting of the Late Triassic magmatism in the Qinling Orogen: New constraints from the interplay between granite emplacement and shear zone deformation in the Shagou area

Liang

Zhang

et al. 2017

Geological Journal

Self Cite

View full text Add to dashboard Cite

Multidisciplinary studies of the Baliping granite pluton and the Shagou shear zone (East Qinling Orogen, Central China) have been conducted to reconstruct the emplacement and deformation processes of the Baliping pluton, to explore the relationship between granite pluton and shear zone deformation, and further to constrain the tectonic setting of the Late Triassic magmatism in the Qinling Orogen which remains controversial. Zircon U–Pb geochronology studies confirmed that the Baliping granites and the protolithes of the Shagou granitic mylonites crystallized from the same magmas at ca. 221 Ma since the two nearly have the same zircon U–Pb ages and Ti–in–zircon temperatures. Meanwhile, the 210 Ma of metamorphic zircons and the 201 Ma of syntectonic granitic vein provide precise limits on the timing of synkinematic deformation in response to Late Triassic orogeny. Anisotropy of magnetic susceptibility, microstructural observation, and shape preferred orientation were combined to study the internal structures. New fabrics datasets display a high degree of coupling between the Baliping pluton and the Shagou shear zone, indicating a syntectonic emplacement of the pluton. Microstructural data suggest that the magmatic to high‐temperature solid‐state deformation is a continuum process in which the fabrics were mainly acquired. We propose an integrated syntectonic emplacement model of the Baliping pluton, in which the shear zone deformation (sinistral transpression) play a significant role on the emplacement of the magma by creating rooms. Emplacement of the pluton, in turn, triggers the nucleation of Shagou shear zone by providing the protoliths and the heat. On the basis of this study, we argued that the Qinling Orogen was still under the convergent setting during 221–201 Ma.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Syntectonic Emplacement and Deformation Of The Baliping Plmentioning

confidence: 99%

See 1 more Smart Citation