Detrital Zircon U-Pb-Hf Isotopes of Middle Neoproterozoic Sedimentary Rocks in the Altyn Tagh Orogen, Southeastern Tarim: Insights for a Tarim-South China-North India Connection in the Periphery of Rodinia
Detrital Zircon U-Pb-Hf Isotopes of Middle Neoproterozoic Sedimentary Rocks in the Altyn Tagh Orogen, Southeastern Tarim: Insights for a Tarim-South China-North India Connection in the Periphery of Rodinia
复制标题
塔里木东南部阿尔金造山带中新元古代沉积岩碎屑锆石U-Pb-Hf同位素：罗迪尼亚周边塔里木-华南-印度北部联系的见解
DOI：
10.2113/2020/8895888
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发表时间：
2020-09
期刊：
影响因子：
2.4
通讯作者：
Tsunogae T.
中科院分区：
文献类型：
--
作者：
Liu Q.;Zhao G.C.;Li J.H.;Yao J.L.;Han Y.G.;Wang P.;Tsunogae T.
在罗迪尼亚超大陆的组装和分裂过程中，塔里木克拉通的位置仍然是个谜，一些模型主张塔里木与澳大利亚有联系，而另一些模型则主张位于澳大利亚和劳伦西亚之间统一的罗迪尼亚超大陆的中心位置。在这项研究中，我们新的锆石U-Pb测年结果表明，塔里木克拉通东南部阿尔金造山带的中新元古代沉积岩沉积于大约1997年至1997年之间。 880 和 760 Ma 处于与裂谷相关的环境中，稍早于罗迪尼亚岛的解体。 750 Ma。现有新元古代地质记录的汇编也表明，塔里木克拉通东南部的阿尔金造山带在大约 1997 年发生了碰撞。 1.0-0.9 Ga 和约裂谷。 850-600 Ma与罗迪尼亚的聚集和分裂有关。此外，为了确定塔里木克拉通相对于罗迪尼亚的古位置，编制了中新元古代沉积岩中可用的碎屑锆石U-Pb年龄和Hf同位素。类似的碎屑锆石年龄（约 0.9、1.3-1.1 和 1.7Ga）和 Hf 同位素表明塔里木克拉通东南部、华夏和印度北部的岩石之间存在密切联系，但排除了澳大利亚北部或西部的密切联系。此外，塔里木克拉通北部的碎屑锆石在大约 100 年前呈现出一个突出的年龄峰值。 830 Ma，在约 830 Ma 处有少量光谱。 1.9和2.5Ga，但缺乏中元古代年龄，与扬子地块北部和西部相当。结合罗迪尼亚超大陆合并和分裂的可比地质响应，我们为罗迪尼亚周边华南和印度北部之间的塔里木克拉通的位置提供了新的视角。
The location of the Tarim craton during the assembly and breakup of the Rodinia supercontinent remains enigmatic, with some models advocating a Tarim-Australia connection and others a location at the heart of the unified Rodinia supercontinent between Australia and Laurentia. In this study, our new zircon U-Pb dating results suggest that middle Neoproterozoic sedimentary rocks in the Altyn Tagh orogen of the southeastern Tarim craton were deposited between ca. 880 and 760 Ma in a rifting-related setting slightly prior to the breakup of Rodinia at ca. 750 Ma. A compilation of existing Neoproterozoic geological records also indicates that the Altyn Tagh orogen of the southeastern Tarim craton underwent collision at ca. 1.0-0.9 Ga and rifting at ca. 850-600 Ma related to the assembly and breakup of Rodinia. Furthermore, in order to establish the paleoposition of the Tarim craton with respect to Rodinia, available detrital zircon U-Pb ages and Hf isotopes from Meso- to Neoproterozoic sedimentary rocks were compiled. Comparable detrital zircon ages (at ca. 0.9, 1.3-1.1, and 1.7 Ga) and Hf isotopes indicate a close linkage among rocks of the southeastern Tarim craton, Cathaysia, and North India but exclude a northern or western Australian affinity. In addition, detrital zircons from the northern Tarim craton exhibit a prominent age peak at ca. 830 Ma with minor spectra at ca. 1.9 and 2.5 Ga but lack Mesoproterozoic ages, comparable to the northern and western Yangtze block. Together with comparable geological responses to the assembly and breakup of the Rodinia supercontinent, we offer a new perspective of the location of the Tarim craton between South China and North India in the periphery of Rodinia.
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影响因子：
3.8
作者：
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通讯作者：
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3
作者：
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4.2
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