Objectives: The Quruqtagh area is located in the northeastern of the Tarim Block. The Quruqtagh area has four Neoproterozoic tillite units. It is of great significance to study the response of the Tarim block to the Neoproterozoic global glacial time. Due to the lack of chronological research, the start- up time of the Neoproterozoic Tereeken Glaciation is controversial. In this paper, zircon U- Pb ages of the tillites at the bottom of the Neoproterozoic Tereeken Formation were determined for the first time. The start time of the Tereeken Glaciation is estimated and the provenances are discussed. Methods: On the basis of detailed field geological survey, we performed the petrology and the zircon U- Pb dating of tillite at the bottom of the Tereeken Formation. Results: We obtained 100 sets of valid data, the youngest zircon age is 652.5±12.0 Ma, and the other three groups are 715～887 Ma, 1700～2300 Ma and 2400～2800 Ma. Disscussion and Conclusion:U- Pb dating of detrital zircons from the tillite at the bottom of the Tereeken Formation yielded 100 groups of U- Pb effective age and the youngest zircon ages 652.5±12 Ma, represent the maximum depositional age(lower limit time) of the Tereekan Formation and the lower limit of the Tereeken glaciation, which is consistent with the global Marinoan glaciation and Nantuo glaciation. We consider that the Tereekan glaciation, Nantuo glaciation and Marinoan glaciation are isochronous. The peak ages of the detrital zircons from the Tereeken Formation are 800 Ma and 1911 Ma, indicating that the provenances of the Tereeken Formation are the rocks aged 715～887 Ma, 1700～2300 Ma and 2400～2800 Ma.