Tectonics of the Qinling (Central China): tectonostratigraphy, geochronology, and deformation history
The Qinling orogen preserves a record of late mid-Proterozoic to Cenozoic tectonism in central China. High-pressure metamorphism and ophiolite emplacement (Songshugou ophiolite) assembled the Yangtze craton, including the lower Qinling unit, into Rodinia during the ∼1.0 Ga Grenvillian orogeny. The l...
Gespeichert in:
| Hauptverfasser: | , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
30 April 2003
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| In: |
Tectonophysics
Year: 2003, Jahrgang: 366, Heft: 1-2, Pages: 1-53 |
| ISSN: | 1879-3266 |
| DOI: | 10.1016/S0040-1951(03)00053-2 |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.1016/S0040-1951(03)00053-2 Verlag: http://www.sciencedirect.com/science/article/pii/S0040195103000532 
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| Verfasserangaben: | Lothar Ratschbacher, Bradley R. Hacker, Andrew Calvert, Laura E. Webb, Jens C. Grimmer, Michael O. McWilliams, Trevor Ireland, Shuwen Dong, Jianmin Hu |
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| 245 | 1 | 0 | |a Tectonics of the Qinling (Central China) |b tectonostratigraphy, geochronology, and deformation history |c Lothar Ratschbacher, Bradley R. Hacker, Andrew Calvert, Laura E. Webb, Jens C. Grimmer, Michael O. McWilliams, Trevor Ireland, Shuwen Dong, Jianmin Hu |
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| 520 | |a The Qinling orogen preserves a record of late mid-Proterozoic to Cenozoic tectonism in central China. High-pressure metamorphism and ophiolite emplacement (Songshugou ophiolite) assembled the Yangtze craton, including the lower Qinling unit, into Rodinia during the ∼1.0 Ga Grenvillian orogeny. The lower Qinling unit then rifted from the Yangtze craton at ∼0.7 Ga. Subsequent intra-oceanic arc formation at ∼470-490 Ma was followed by accretion of the lower Qinling unit first to the intra-oceanic arc and then to the Sino-Korea craton. Subduction then imprinted a ∼400 Ma Andean-type magmatic arc onto all units north of the northern Liuling unit. Oblique subduction created Silurian-Devonian WNW-trending, sinistral transpressive wrench zones (e.g., Lo-Nan, Shang-Dan), and Late Permian-Early Triassic subduction reactivated them in dextral transpression (Lo-Nan, Shang-Xiang, Shang-Dan) and subducted the northern edge of the Yangtze craton. Exhumation of the cratonal edge formed the Wudang metamorphic core complex during dominantly pure shear crustal extension at ∼230-235 Ma. Post-collisional south-directed shortening continued through the Early Jurassic. Cretaceous reactivation of the Qinling orogen started with NW-SE sinistral transtension, coeval with large-scale Early Cretaceous crustal extension and sinistral transtension in the northern Dabie Shan; it presumably resulted from the combined effects of the Siberia-Mongolia—Sino-Korean and Lhasa-West Burma—Qiangtang-Indochina collisions and Pacific subduction. Regional dextral wrenching was active within a NE-SW extensional regime between ∼60 and 100 Ma. An Early Cretaceous Andean-type continental magmatic arc, with widespread Early Cretaceous magmatism and back-arc extension, was overprinted by shortening related to the collision of Yangtze-Indochina Block with the West Philippines Block. Strike-slip and normal faults associated with Eocene half-graben basins record Paleogene NNE-SSW contraction and WNW-ESE extension. The Neogene(?) is characterized by normal faults and NNE-trending sub-horizontal extension. Pleistocene(?)-Quaternary NW-SE extension and NE-SW contraction comprises sinistral strike-slip faults and is part of the NW-SE extension imposed across eastern Asia by the India-Asia collision. | ||
| 650 | 4 | |a Ar/Ar thermochronology | |
| 650 | 4 | |a Dabie Shan | |
| 650 | 4 | |a Proterozoic to Cenozoic tectonics | |
| 650 | 4 | |a Qinling | |
| 650 | 4 | |a Structural geology | |
| 650 | 4 | |a Ultrahigh-pressure orogeny | |
| 700 | 1 | |a Hacker, Bradley R. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Calvert, Andrew |e VerfasserIn |4 aut | |
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| 700 | 1 | |a Ireland, Trevor |e VerfasserIn |4 aut | |
| 700 | 1 | |a Dong, Shuwen |e VerfasserIn |4 aut | |
| 700 | 1 | |a Hu, Jianmin |e VerfasserIn |4 aut | |
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