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Journal of University of Chinese Academy of Sciences ›› 2024, Vol. 41 ›› Issue (4): 503-516.DOI: 10.7523/j.ucas.2022.073

• Research Articles • Previous Articles    

Sedimentary facies and detrital provenance evolution of the Sinian Sugetebulak Formation from northern margin of Tarim Basin: a case study of XH1 well in Tabei uplift

ZHANG Wei, HU Juncheng, ZHANG Yuxiu   

  1. College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2022-01-27 Revised:2022-06-28

Abstract: The Tabei uplift from the north of Tarim Basin lacks Sinian outcrops, resulting in a lack of understanding of the Sinian stratigraphic development and provenance evolution. In this study, the detrital components, heavy minerals, detrital zircon U-Pb-Hf isotopic and REE data for the sandstone of the Neoproterozoic Sugetebulak Formation, were studied based on the XH1 well from the Tabei uplift. According to the logging curves, core facies transformation and heavy mineral indexes, it is concluded that the Sinian Sugetebulak Formation in Tabei uplift deposited in tidal flat environment. The U-Pb ages of detrital zircons are divided into four groups: 2 900-2 400, 2 300-1 600, 1 100-900, and 750-580 Ma. The maximum depositional age of the Sugatebulak Formation is no earlier than 572 Ma. The heavy minerals and detrital zircons indicate that the parent rocks are mainly acidic magmatic rocks with small amount of basic-ultrabasic rocks. The provenance is mainly from the Kuruqtage area and its vicinity, the eastern basement of the Tarim Basin and the West Kunlun area, with a small amount from the central Tianshan microcontinent. Paleoproterozoic zircons yield Hf model ages (TDMC) range from 3 474 Ma to 2 360 Ma, and some Paleoproterozoic zircons show positive εHf(t) values, indicating zircons were derived from juvenile mantle-derived material at those periods. However, most Paleoproterozoic zircons show negative εHf(t) values, suggesting the crustal reworking was the dominant process from Archaean to Paleoproterozoic. The Neoproterozoic detrital zircons have negative εHf(t) values and yield Hf model ages (TDMC) range from 4 032 Ma to 1 485 Ma, which suggest that the Neoproterozoic detrital zircons were derived from reworking of the ancient Archaean to middle Proterozoic. Based on the data of this study and previous data, it is considered that the northern margin of Tarim Basin was the collision background during the Sugetebulak period.

Key words: Tarim Basin, Sugetebulak Formation, maximum depositional age, detrital provenance, detrital zircon

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