羌塘地塊
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金沙江縫合帶反映三疊紀時羌塘地塊北緣向南,潛沒到松潘-甘孜地塊下方。在侏羅紀,拉薩地體與羌塘地塊的南緣沿班公湖縫合帶熔合。[1]:Geologic setting, p. 475這一縫合帶也是特提斯洋的閉合線,使羌塘地塊變成了巨大的背斜。[2]:Geologic setting, pp. 32–33
羌塘地塊目前海拔約5km,不過其抬升的具體時間存在爭議,從上新世-更新世(3–5 Ma)到始新世(35 Ma)的估計都有。後者的估計基於高原第一次遭受剝蝕作用的時間。[2]:Introduction, pp. 31–32
另見
羌塘地塊相關(由南向北)
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注釋
資料
- Wang, Q.; Wyman, D. A.; Xu, J.; Wan, Y.; Li, C.; Zi, F.; Jiang, Z.; Qiu, H.; Chu, Z.; Zhao, Z.; Dong, Y. 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. 2008, 155 (4) [1 January 2020]. Bibcode:2008CoMP..155..473W. S2CID 140614302. doi:10.1007/s00410-007-0253-1.:473–490
- Xu, Q.; Ding, L.; Zhang, L.; Cai, F.; Lai, Q.; Yang, D.; Liu-Zeng, J. Paleogene high elevations in the Qiangtang Terrane, central Tibetan Plateau (PDF). Earth and Planetary Science Letters. 2013, 362 [1 January 2020]. Bibcode:2013E&PSL.362...31X. doi:10.1016/j.epsl.2012.11.058.[失效連結]:31–42