There are three diamictite (tillite) units in the Guozigou—Keguqin section in Ili area of the northern part of the Western Tianshan Mountains, which are Qurutielikti Formation (Lower diamictite), Biexibasitao Formation (Middle diamictite) and Talisaye Formation (Upper diamictite) from bottom to top. According to the former study, the Talisaye Formation is still correlated with the Hagriqaok diamictite in Quruqtagh area. This paper reports a magmatic zircon age of 642±5 Ma (206Pb/238U) from granite-porphyry, which intrudes into the top of the Talisaye Formation. This dating represents the evolved magma age. Even this is the dating of the intrusive body, yet this is a new evidence for the up limit of the Talisaye Formation. Meanwhile, the Qulutielikti Formation (Lower diamictite), the Biexibasitao Formation (Middle diamictite) correlated with Bayxi diamictite and Alatonggou diamictite respectively in Quruqtagh area, so we can put a suggestion that the Talisaye diamictite is correlated with Teruiaiken diamictite and not with Hagriqaok diamictite in Quruqtagh area. So,this paper advanced a new evidence for the Neoproterozoic glaciogenic diamictite between the Guozigou section in the Western Tianshan and some sections in Quruqtagh area in the Eastern Tianshan.