Early hydrosphere-rock interactions and intra-crustal recycling recorded by remarkably high-δ18O Mesoarchean granitoids in the Sulu orogenic belt, eastern China
Early hydrosphere-rock interactions and intra-crustal recycling recorded by remarkably high-δ18O Mesoarchean granitoids in the Sulu orogenic belt, eastern China
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中国东部苏鲁造山带极高δ18O中太古代花岗岩记录的早期水圈-岩石相互作用和地壳内循环
DOI：
10.1016/j.precamres.2021.106311
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发表时间：
2021-08
影响因子：
3.8
通讯作者：
Liu Fulai
中科院分区：
文献类型：
--
作者：
Liu Jianhui;Ding Zhengjiang;Chen Hui;Wang Xiangjian;Liu Fulai
全球板块构造何时、为何以及如何发起，以及板块构造随时间的长期变化是地球科学的基本问题。在这项研究中，我们提出了中国东部苏鲁造山带海洋所杂岩高品位花岗质片麻岩中复杂锆石的 U-Pb、Hf 和 O 同位素数据集。该组合数据集揭示了花岗岩至少由大约 ca 形成。 3.22、2.81、2.70 和 2.58 Ga，并记录了大约发生在 3.22、2.81、2.70 和 2.58 Ga 的多个变质热事件。 3.05、2.60–2.50 和 1.93–1.85 Ga。3.22 和 2.58 Ga 花岗岩具有负 εHf(t) 值（平均值分别为 -2.08 和 -10.81），源自演化的始太古代地壳的重熔，结合 3.47 Ga 继承的锆石，反映了成熟的锆石的出现。长英质大陆地壳位于 古太古代，而 2.81 和 2.70 Ga 花岗岩类则显示出正的 εHf(t) 值（平均值分别为 + 4.32 和 + 2.23），是由约 10 世纪贫化地幔衍生的新生地壳重熔形成的。 3.0 Ga。3.22、2.70 和 2.58 Ga 花岗岩具有类幔或微富集的锆石 δ18O 值（平均值分别为 5.53 ± 0.15、5.41 ± 0.18 和 6.10 ± 0.22 ‰）。然而，2.81 Ga花岗岩显示出非常高的锆石δ18O值，范围为9.65至7.02‰，平均值为8.48 ± 0.29‰ (1 SD)，这表明中太古代发生了早期水圈-岩石相互作用和地壳内循环。综上，我们提出高δ18O中太古代花岗岩形成的构造模式：（1）大量高密度下地壳的生成，伴随着以TTG为主的早期长英质大陆的形成； （2）高密度下地壳与岩石圈地幔一起拆沉引起的重力驱动的较致密的洋壳相对于大陆地壳的俯冲； (3)随后由于脱层引起的热软流圈地幔上涌而导致改变的高δ18O水合洋壳部分熔融，形成高δ18O中太古代花岗岩。此外，我们认为重力驱动的俯冲发生在太古代，俯冲可能是自中太古代以来锆石内 δ18O 值增加的趋势的原因。
When, why and how global plate tectonics were initiated, as well as secular changes of plate tectonics over time are fundamental issues in the earth sciences. In this study, we present a combined U-Pb, Hf and O isotope dataset for complex zircons from the high-grade granitic (TTG) gneisses of the Haiyangsuo complex in the Sulu orogenic belt, eastern China. This combined dataset reveals that the granitoids formed by at least ca. 3.22, 2.81, 2.70 and 2.58 Ga and recorded multiple metamorphic thermal events that occurred at ca. 3.05, 2.60–2.50 and 1.93–1.85 Ga. The 3.22 and 2.58 Ga granitoids have negative εHf(t)values (averages of −2.08 and −10.81, respectively) and were derived from remelting of evolved Eoarchean crust, in combination of 3.47 Ga inherited zircon, reflecting occurrence of matured felsic continent crust in the Paleoarchean, whereas the 2.81 and 2.70 Ga granitoids show positive εHf(t)values (averages of + 4.32 and + 2.23, respectively) and formed by remelting of juvenile crust derived from depleted mantle at ca. 3.0 Ga. The 3.22, 2.70 and 2.58 Ga granitoids have mantle-like or slightly enriched zircon δ18O values (averages of 5.53 ± 0.15, 5.41 ± 0.18 and 6.10 ± 0.22‰, respectively). However, the 2.81 Ga granitoid displays remarkably high zircon δ18O values ranging from 9.65 to 7.02‰ with an average of 8.48 ± 0.29‰ (1 SD), this demonstrates occurrences of early hydrosphere-rock interactions and intra-crustal recycling in the Mesoarchean. Synthetically, here we propose the following tectonic model for the formation of the high-δ18O Mesoarchean granitoids: (1) Generation of voluminous high-density lower crust along with the formation of early felsic continent dominated by TTGs; (2) gravity-driven subduction of denser oceanic crust relative to continental crust induced by delamination of high-density lower crust together with lithospheric mantle; and (3) subsequently partial melting of altered high-δ18O hydrated oceanic crust caused by delamination-induced hot asthenospheric mantle upwelling to form the high-δ18O Mesoarchean granitoid. Furthermore, we argue that gravity-driven subduction occurred in the Archean, and subduction may be responsible for the trend towards increasing δ18O values within zircons since the Mesoarchean.
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影响因子：
3.8
作者：
Pei Lv;ShengyaoYu;Yin‐biao Peng;Jian Zhang;Weiming Xie;Xingzhou Jiang;Xiangyu Gao;Wentao Ji-Wentao
通讯作者：
Pei Lv;ShengyaoYu;Yin‐biao Peng;Jian Zhang;Weiming Xie;Xingzhou Jiang;Xiangyu Gao;Wentao Ji-Wentao
影响因子：
64.8
作者：
A. Rozel;G. Golabek;C. Jain;P. Tackley;T. Gerya
通讯作者：
A. Rozel;G. Golabek;C. Jain;P. Tackley;T. Gerya
锆石U-Pb、Lu-Hf联合同位素分析破译华北克拉通冀东草场地区中太古代至新太古代地壳生长与再循环历史
影响因子：
3.5
作者：
Liou Peng;Guo Jinghui
通讯作者：
Guo Jinghui
DOI：
10.1130/2008.2440(01
发表时间：
2008-07
期刊：
--
影响因子：
--
作者：
S. Shirey;B. Kamber;M. Whitehouse;P. Mueller;A. Basu
通讯作者：
S. Shirey;B. Kamber;M. Whitehouse;P. Mueller;A. Basu
影响因子：
3.5
作者：
Jian‐Bo Zhou;S. Wilde;Fu-Lai Liu;Jie Han
通讯作者：
Jian‐Bo Zhou;S. Wilde;Fu-Lai Liu;Jie Han