羌塘地块
位于中国西藏北部地区的构造单元
金沙江缝合带反映三叠纪时羌塘地块北缘向南,潜没到松潘-甘孜地块下方。在侏罗纪,拉萨地体与羌塘地块的南缘沿班公湖缝合带熔合。[1]:Geologic setting, p. 475这一缝合带也是特提斯洋的闭合线,使羌塘地块变成了巨大的背斜。[2]:Geologic setting, pp. 32–33
羌塘地块目前海拔约5km,不过其抬升的具体时间存在争议,从上新世-更新世(3–5 Ma)到始新世(35 Ma)的估计都有。后者的估计基于高原第一次遭受剥蚀作用的时间。[2]:Introduction, pp. 31–32
另见
编辑羌塘地块相关(由南向北)
参考
编辑注释
编辑资料
编辑- 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