Qiangtang terrane

The Qiantang terrane is one of three main west-east-trending terranes of the Tibetan Plateau.

Location of Qiangtang Terranes. Bangong-Nujiang Suture Zone separates it from the Lhasa Terrane, which in turn is separated by the Indus-Yarlung suture zone from the Himalayas in the south.
Tectonic map of the Himalaya, modified after Le Fort & Cronin (1988). Red is Transhimalaya. Green is Indus-Yarlung suture zone, north of which lies Lhasa terrane, follow by Bangong-Nujiang Suture Zone and then Qiangtang terrane.

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 Jurassic, the Lhasa terrane merged with its southern margin along the Bangong suture.[1] This suture, the closure of part of the Tethys Ocean, transformed the Qiantang terrane into a large-scale anticline.[2]

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.[3]

See also

Qiangtang terrane related (from south to north)

References

Notes
  1. Wang et al. 2008, Geologic setting, p. 475
  2. Xu et al. 2013, Geologic setting, pp. 32–33
  3. Xu et al. 2013, Introduction, pp. 31–32

Sources
  • 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. doi:10.1007/s00410-007-0253-1. S2CID 140614302. Retrieved 1 January 2020.CS1 maint: ref=harv (link)
  • 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. doi:10.1016/j.epsl.2012.11.058. Retrieved 1 January 2020.CS1 maint: ref=harv (link)


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