Acta Scientiarum Naturalium Universitatis Pekinensis ›› 2016, Vol. 52 ›› Issue (3): 467-474.DOI: 10.13209/j.0479-8023.2016.043

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U-Pb Detrital Zircon Age Constraints on the Neoproterozoic Tereeken Glaciation in the Quruqtagh Area, Northwestern China

LUO Zhiwen1, XU Bei1, HE Jinyou2   

  1. 1. The Key Laboratory of Orogenic Belts and Crustal Evolution (MOE), School of Earth and Space Sciences, Peking University, Beijing 100871
    2. School of Energy Resources, China University of Geosciences, Beijing 100083
  • Received:2015-03-03 Revised:2015-09-17 Online:2016-05-20 Published:2016-05-20
  • Contact: XU Bei, E-mail: bxu(at)pku.edu.cn

新疆库鲁克塔格地区特瑞艾肯冰期时代的碎屑锆石年代学制约

罗志文1, 徐备1 , 何金有2   

  1. 1. 造山带与地壳演化教育部重点实验室, 北京大学地球与空间科学学院, 北京 100871
    2. 中国地质大学(北京)能源学院, 北京 100083
  • 通讯作者: 徐备, E-mail: bxu(at)pku.edu.cn
  • 基金资助:
    国家自然科学基金(40032010)资助

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Abstract:

U-Pb dating of detrital zircons from the pebbly siltstone at the top of the Tereeken Formation yielded the youngest zircon ages of 629±8 Ma, representing the maximum depositional age of the Tereekan glaciation. This result indicates that the Tereeken glaciation might be correlated with the Nantuo glaciation in the Yangtze Platform and the global Elatina or Marinoan glaciation. The remaining older zircons fall into three age-groups: 718-887 Ma, 1822-2092 Ma and 2345-2613 Ma, indicating three main Precambrian magmatic events in the Quruqtagh area.

Key words: Quruqtagh, tillites, detrital zircon dating, Neoproterozoic glaciation

摘要：

通过对特瑞艾肯组冰碛岩顶部含砾粉砂岩的碎屑锆石年代学分析, 得到最年轻锆石的年龄为629±8 Ma, 代表特瑞爱肯冰碛岩的沉积时代上限。该年龄限定了特瑞爱肯冰期的结束时代, 并可与扬子板块的南沱冰期以及全球范围的Elatina冰期或Marinoan冰期对比。其余较老年龄集中分布在 718~887 Ma, 1822~2092 Ma 和2345~2613 Ma, 暗示库鲁克塔格地区前寒武纪的3 个主要岩浆活动时期。

关键词: 库鲁克塔格, 冰碛岩, 碎屑锆石年龄, 新元古代冰期

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