Abstract The Proterozoic is the longest Eon in geological history and witnessed the assemblies and breakups of the Columbia and Rodinia supercontinents. The Tarim Craton has been proposed to be a building block of these supercontinents. However, its tectonic evolution during late Paleoproterozoic to earliest Neoproterozoic (ca. 1.8–0.8 Ga) has been poorly understood, due to the paucity of geological record. In this paper, we present U-Pb and Lu-Hf isotopic data for detrital zircons from the metasediments of the early Neoproterozoic Paergangtag Group and the Paleoproterozoic Xinditag Group in the Kuruktag area, northern Tarim Craton. Although formed approximately 1 billion years later, the Paergangtag Group contains detrital zircons almost identical to those in the Xinditag Group. LA-ICP-MS U-Pb dating yields a ca. 2.0 Ga age peak, as well as a group of older zircons of ca. 2.5 Ga in six samples from these two groups. Lu-Hf data show that the ca. 2.0 Ga zircons have variable eHf(t) values (−28.1 to 0.1), indicating the detritus were mostly derived from reworked continental crusts. The older zircons around 2.5 Ga have both negative and positive eHf(t) values (−28.5 to 9.5), indicating a prolonged and complicated crustal growth and reworking process in the source area. It is inferred that the zircons in these samples were likely derived from southeastern Tarim Craton, where a ca. 2.0 Ga orogenic event has been documented. The fact that the Neoproterozoic Paergangtag Group contains only Paleoproterozoic and older zircons suggests that the Tarim Craton was not involved in the Grenville Orogeny, which developed between the colliding continents in the interior of the Rodinia Supercontinent. In contrast, the Tarim Craton was probably on the periphery of the Rodinia Supercontinent and was involved in the peripheral subduction zone of the supercontinent shortly after the deposition of the Paergangtag Group. Our new data imply that the Tarim Craton might have been a tectonically stable continent for nearly 1 billion years from ca. 1.8 to 0.9 Ga.

中文翻译：

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塔里木克拉通元古代构造演化：库鲁克塔格地区变质沉积物碎屑锆石 U-Pb 和 Lu-Hf 同位素的新见解

摘要 元古代是地质史上最长的纪元，见证了哥伦比亚和罗迪尼亚超大陆的组装和分裂。塔里木克拉通已被提议作为这些超大陆的基石。然而，由于缺乏地质记录，人们对其在晚古元古代到最早的新元古代（约 1.8-0.8 Ga）的构造演化知之甚少。在本文中，我们提供了来自塔里木克拉通北部库鲁克塔格地区早新元古代帕尔冈塔格群和古元古代新地塔格群变沉积物中碎屑锆石的 U-Pb 和 Lu-Hf 同位素数据。尽管在大约 10 亿年后形成，但帕尔冈塔格群包含的碎屑锆石与新地塔格群中的碎屑锆石几乎相同。LA-ICP-MS U-Pb 测年产生约。2.0 Ga 年龄峰值，以及一组较老的约 锆石。来自这两组的六个样品中的 2.5 Ga。Lu-Hf 数据显示，大约 2.0 Ga 锆石具有可变的 eHf(t) 值（-28.1 至 0.1），表明碎屑主要来自重新加工的大陆地壳。2.5 Ga 附近的老锆石具有正负 eHf(t) 值（-28.5 至 9.5），表明源区的地壳生长和再加工过程漫长而复杂。据推测，这些样品中的锆石很可能来自塔里木克拉通东南部，其中约 2.0 Ga 造山事件已被记录。新元古代帕尔冈塔格群仅包含古元古代和更古老的锆石这一事实表明塔里木克拉通并未参与格伦维尔造山运动，它在罗迪尼亚超大陆内部的碰撞大陆之间发展起来。相比之下，塔里木克拉通可能位于罗迪尼亚超大陆的外围，在帕尔冈塔格群沉积后不久就参与了超大陆的外围俯冲带。我们的新数据表明，塔里木克拉通可能是一个构造稳定的大陆，从大约 10 亿年开始有近 10 亿年的时间。1.8 至 0.9 Ga。