A rift basin developed in the Neoproterozoic Tarim Craton and it provides a key perspective for understanding the breakup of Rodinia. The rift-related successions with glacial deposits spanning ca. 200 m.y. in the North Tarim are studied through detrital zircon U-Pb dating and seismic interpretation. A total of 1503 ages from 11 samples are reported and two kinds of age distribution patterns are recognized. Samples of the Qiaoenbrak Group show unimodal distribution with most ages at 900–800 Ma; samples of the upper two formations show bimodal distribution: One age range at 900–600 Ma and another at 2000–1800 Ma. The emergence of Paleoproterozoic zircons indicates uplift and exhumation of the basement, which is compatible with plume upwelling. We find that there are prominent gaps between depositional ages and crystalline ages of detrital zircons, which corresponds with a plume environment instead of a back-arc environment. Besides, seismic and well data show that the Qiaoenbrak Group was deposited in (half-)grabens controlled by normal faults. The lower Sinian was less restricted but still affected by these faults, while the Upper Sinian thickens prominently towards the outer edge of the basin. Together, we propose a new two-stage plume-induced model for the Neoproterozoic rift in the Tarim Craton in which two different evolution paths are recognized: From rift to aulacogen for the Nanhua Qiaoenbrak Group, and from rift to passive margin for the Sinian System

中文翻译：

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塔里木北部新元古代两期羽流诱发裂谷：来自碎屑锆石研究和地震解释的证据

新元古代塔里木克拉通发育的裂谷盆地，为理解罗迪尼亚的裂解提供了关键视角。与裂谷相关的冰川沉积层序跨越约。通过碎屑锆石U-Pb测年和地震解释对塔北地区200米进行了研究。共报告了 11 个样本的 1503 个年龄，并识别了两种年龄分布模式。 Qiaoenbrak群样品呈单峰分布，大部分年龄在900~800 Ma；上部两个地层的样本显示出双峰分布：一个年龄范围为 900-600 Ma，另一个年龄范围为 2000-1800 Ma。古元古代锆石的出现表明基底的隆起和折返，这与羽流上涌相一致。我们发现碎屑锆石的沉积年龄和结晶年龄之间存在显着的差距，这对应于羽流环境而不是弧后环境。此外，地震和测井资料表明，乔恩布拉克群沉积在受正断层控制的（半）地堑中。下震旦统受到的限制较少，但仍受这些断层的影响，而上震旦统向盆地外缘显着增厚。我们共同提出了塔里木克拉通新元古代裂谷的两阶段羽流诱发模型，其中识别了两种不同的演化路径：南华乔恩布拉克群从裂谷到奥拉槽，震旦系从裂谷到被动边缘