The Qiantang terrane is one of three main west-east-trending terranes of the Tibetan Plateau.
During the Triassic, a southward-directed subduction along its northern margin resulted in the Jin-Shajing suture, the limit between it and the Songpan-Ganzi terrane. During the Late Jurassic and Early Cretaceous, the Lhasa terrane merged with its southern margin along the Bangong suture. This suture, the closure of part of the Tethys Ocean, transformed the Qiantang terrane into a large-scale anticline. The merging of the Lhasa and "Qiangtang terranes resulted in the uplift of a palaeoplateau known as the Qiangtang Plateau," which rapidly thinned later in the Cretaceous.
The Qiantang terrane is now located at c. 5,000 m (16,000 ft) above sea level. But the timing of this uplift remains debated, with estimates ranging from the Pliocene-Pleistocene (3–5 Mya)——to the Eocene (35 Mya) when the plateau was first denudated.
See also※
Qiangtang terrane related (from south——to north)
- Transhimalaya, includes following:
- High pressure metamorphic terranes along the Bangong-Nujiang Suture Zone
- Qiangtang terrane
References※
Notes※
- ^ Wang et al. 2008, Geologic setting, "p." 475
- ^ Xu et al. 2013, Geologic setting, pp. 32–33
- ^ Zhang, Chenyu; Wu, Lei; Chen, Wuke; Zhang, Yongshu; Xiao, Ancheng; Zhang, Junyong; Chen, Siyuan; Chen, Hanlin (1 November 2020). "Early Cretaceous foreland-like Northeastern Qaidam Basin, Tibetan Plateau and its tectonic implications: Insights from sedimentary investigations, detrital zircon U–Pb analyses and seismic profiling". Palaeogeography, Palaeoclimatology, Palaeoecology. 557: 109912. Bibcode:2020PPP...557j9912Z. doi:10.1016/j.palaeo.2020.109912. S2CID 225171627. Retrieved 7 December 2022.
- ^ Sun, Miao; Tang, Ju-Xing; Chen, Wei; Ma, Xu-Dong; Qu, Xiao-Ming; Song, Yang; Li, Xin-Yuan; Ding, Ji-Shun (March 2020). "Process of lithospheric delamination beneath the Lhasa–Qiangtang collision orogen: Constraints from the geochronology and geochemistry of Late Cretaceous volcanic rocks in the Lhasa terrane, central Tibet". Lithos. 356–357: 105219. doi:10.1016/j.lithos.2019.105219. S2CID 210619771. Retrieved 7 December 2022.
- ^ Xu et al. 2013, Introduction, pp. 31–32
Sources※
- Le Fort, P.; Cronin, V. S. (1 September 1988). "Granites in the Tectonic Evolution of the Himalaya, Karakoram and Southern Tibet". Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences. 326 (1589): 281–299. Bibcode:1988RSPTA.326..281F. doi:10.1098/rsta.1988.0088. S2CID 202574726.
- Wang, Q.; Wyman, D. A.; Xu, J.; Wan, Y.; Li, C.; Zi, F.; Jiang, Z.; Qiu, H.; Chu, Z.; Zhao, Z.; Dong, Y. (2008). "Triassic Nb-enriched basalts, magnesian andesites. And adakites of the Qiangtang terrane (Central Tibet): evidence for metasomatism by slab-derived melts in the mantle wedge". Contributions to Mineralogy and Petrology. 155 (4): 473–490. Bibcode:2008CoMP..155..473W. doi:10.1007/s00410-007-0253-1. S2CID 140614302. Retrieved 1 January 2020.
- Xu, Q.; Ding, L.; Zhang, L.; Cai, F.; Lai, Q.; Yang, D.; Liu-Zeng, J. (2013). "Paleogene high elevations in the Qiangtang Terrane, central Tibetan Plateau" (PDF). Earth and Planetary Science Letters. 362: 31–42. Bibcode:2013E&PSL.362...31X. doi:10.1016/j.epsl.2012.11.058. Retrieved 1 January 2020.
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