The lost world 1992 plateau4/1/2024 ![]() Previous studies have suggested Neo-Tethys oceanic slab break-off at 50–45 Ma thus, the Wuyu Eocene magmatism could represent a magmatic response to this slab break-off and originate from relatively juvenile Lhasa crust. ![]() 46 Ma) trachyandesites and trachydacites show slight fractionation of rare earth elements (REE), slightly negative Eu and Sr anomalies, and relatively homogeneous Sr-Nd and zircon Hf isotopes ( 87Sr/ 86Sr(i) = 0.7050–0.7063, εNd(t) = −0.92 to −0.03, εHf(t) = +2.6 to +4.8). Here we report on Cenozoic magmatism in the Wuyu area of the eastern Lhasa block. The nature and timing of post-collisional crustal thickening and its link to surface uplift in the eastern Lhasa block of the southern Tibetan plateau remain controversial.
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