Geochronology and geochemistry of the Bashikaogong S-type granitic rocks: a record of Early Paleozoic subduction and collision in North Altun, Northwestern China

Geochronology and Geochemistry of Granitic Pegmatites from Tashidaban Li Deposit in the Central Altun Tagh, Northwest China

“…Formation times of granites and granitic pegmatite Li-Be deposits in the CAB. The granite ages of the NAB are from [90][91][92][93][94][95][96][97][98][99][100][101]; the granite ages of the CAB are from [46][47][48]60,62,[88][89][90][102][103][104][105]. Igneous crystallization and mineralization ages of Li-Be deposits are consistent with the literature in Figure 1.…”

“…Zircon age reveals these volcanic rocks and granites were formed between 517 and 459 Ma, which is coeval with the age spectra of detrital zircons in the Early Paleozoic sedimentary rocks from the North Altun [143]. A series of syn-collisional granite formed in the thickened lower crust at 458-431 Ma indicated a collisional regime [92][93][94]96,97,99]. The transition of the tectonic regime has changed to extension at ~425 Ma with the characterizations of low Sr, Sr/Y and (La/Yb)N granitoids (425-410 Ma) [94,96,99].…”

“…A series of syn-collisional granite formed in the thickened lower crust at 458-431 Ma indicated a collisional regime [92][93][94]96,97,99]. The transition of the tectonic regime has changed to extension at ~425 Ma with the characterizations of low Sr, Sr/Y and (La/Yb)N granitoids (425-410 Ma) [94,96,99].…”