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Whole-rock geochemistry, Sr–Nd isotope and zircon U–Pb isotope data are reported for seven granitoid intrusions from the eastern Lhasa terrane. Our zircon U–Pb data exhibit three periods of magmatism: 164–125Ma, 83Ma, and 71–45Ma. Granitoids from the Middle Jurassic to Early Cretaceous (164–125Ma) display evolved Nd isotope composition, with ε Nd (t)=−8.6 to −15.5 and T 2DM =1.6 to...
Post-collisional high Sr/Y-type magmatism in the southern Lhasa terrane extends ~1500km along the strike of the orogen. The origin and magma generation mechanism for these rocks remain controversial. We report a detailed study of such high Sr/Y-type magmatism in the east Himalayan syntaxis, SE Tibet, and explain its significance for understanding post-collisional geodynamical processes. The two-mica...
This integrated study of whole rock geochemistry, zircon U–Pb dating and Hf isotope composition for seven felsic rocks from the Nyingchi Complex in eastern Himalayan syntaxis has revealed a complex magmatic history for the eastern Gangdese belt. This involves multiple melt sources and mechanisms that uniquely identify the tectonic evolution of this part of the Himalayan orogen. Our U–Pb zircon dating...
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