Final-Stage Magmatic Record of Paleo-Asian Oceanic Subduction? Insights from Late Permian to Early Triassic Intrusive Rocks in the Yanbian Area, Easternmost Central Asian Orogenic Belt
Final-Stage Magmatic Record of Paleo-Asian Oceanic Subduction? Insights from Late Permian to Early Triassic Intrusive Rocks in the Yanbian Area, Easternmost Central Asian Orogenic Belt
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古亚洲大洋俯冲的最后阶段岩浆记录？
DOI：
10.3390/min10090799
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发表时间：
2020-09
期刊：
影响因子：
2.5
通讯作者：
Guan Qing-Bin
中科院分区：
文献类型：
--
作者：
Zhang Chao;Neubauer Franz;Liu Zheng-Hong;Cui Fang-Hua;Guan Qing-Bin
本文报告了中国东北延边地区晚二叠世至早三叠世侵入岩的新锆石 LA-ICP-MS U-Pb 和 Hf 同位素数据以及全岩主量和微量元素数据。这些数据为了解古亚洲洋最终俯冲到华北克拉通下方的时间提供了新的见解。锆石U-Pb年龄资料表明，延边地区存在一套与俯冲有关的晚二叠世至早三叠世侵入岩。晚二叠世侵入岩由闪长岩组成，而早三叠世花岗岩和角闪辉长岩构成地球化学双峰火成岩组合。此外，早三叠世花岗岩显示出钾玄岩的地球化学特征。所有岩石的特征都是富集 LILE 和 LREE，而贫化 HREE 和 HFSE，这表明它们是在俯冲环境中形成的。早三叠世辉长岩的锆石的 e(Hf)(t) 值和 T(DM2) 年龄分别为 +7.6 至 +10.7 和 735-1022 Ma，表明它们是由岩石圈地幔物质部分熔融产生的原生岩浆形成的，而岩石圈地幔物质先前已被俯冲相关流体改变。晚二叠世闪长岩的ε(Hf)(t)值和T(DM2)年龄分别为+0.5～+9.5和853～1669 Ma，Al2O3、Fe2O3含量较高，SiO2、Cr、Ni含量较低，表明晚二叠世闪长岩应来源于地幔，并受到某些地壳物质的影响。早三叠世花岗岩具有较大范围的 epsilon(Hf)(t) 值和 T(DM2) 年龄，分别为 -4.8 至 +9.4 和 852 至 2136 Ma。它们的锆石表明，早三叠世花岗岩可能主要源自地壳的部分熔融，古地壳的地壳物质贡献较小。延边地区早三叠世双峰式侵入岩及其区域地质资料因此，记录由于先前俯冲板块的断裂而导致的最终俯冲后伸展环境。
This paper reports new zircon LA-ICP-MS U-Pb and Hf isotope data, and whole-rock major and trace element data for Late Permian to Early Triassic intrusive rocks in the Yanbian area, NE China. These data provide new insights into the timing of the final subduction of the Paleo-Asian Ocean beneath the North China Craton. The zircon U-Pb age data indicate that a suite of Late Permian to Early Triassic intrusive rocks related to subduction is present within the Yanbian area. The Late Permian intrusive rocks consist of diorites while the Early Triassic granites and hornblende gabbros constitute a geochemically bimodal igneous rock association. Furthermore, the Early Triassic granites show the geochemical characteristics of shoshonitic rocks. All the rocks are characterized by enrichment in LILEs and LREEs, and depletion in HREEs and HFSEs, suggesting they formed in a subduction setting. Zircons from the Early Triassic gabbros have epsilon(Hf)(t) values and T(DM2)ages of +7.6 to +10.7 and 735-1022 Ma, respectively, suggesting that they formed from a primary magma generated by the partial melting of lithospheric mantle material that had been previously modified by subduction-related fluids. The Late Permian diorites have epsilon(Hf)(t) values and T(DM2)ages of +0.5 to +9.5 and 853 to 1669 Ma, respectively, while they have high contents of Al2O3, Fe2O3, and low contents of SiO2, Cr, and Ni, indicating Late Permian diorites should derive from the mantle and are influenced by some crustal material. Early Triassic granitic rocks have a wide range of epsilon(Hf)(t) values and T(DM2)ages of -4.8 to +9.4 and 852 to 2136 Ma, respectively. Their zircons imply that the Early Triassic granites could be mainly derived from partial melting of the crust, with minor contribution of the crustal material of an ancient crust. The Early Triassic bimodal intrusive rocks in Yanbian area, combined with the regional geologic information; therefore, record a final post-subduction extensional environment due to the break-off of the previously subducted slab.
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DOI：
10.1146/annurev-earth-060614-105254
发表时间：
2015-06
影响因子：
14.9
作者：
W. Xiao;B. Windley;S. Sun;Jiliang Li;Baochun Huang;Chunming Han;C. Yuan;Minjia Sun;Hanlin Chen-Hanli
通讯作者：
W. Xiao;B. Windley;S. Sun;Jiliang Li;Baochun Huang;Chunming Han;C. Yuan;Minjia Sun;Hanlin Chen-Hanli
吉林省东部（中国东北）二叠纪-三叠纪砂岩的年代学和地球化学：对古亚洲洋最终闭合的影响
影响因子：
8.9
作者：
Du Qing Xiang;Han Zuozhen;Shen Xiao Li;Han Chao;Song Zhigang;Gao Lihua;Han Mei;Zhong Wenjian
通讯作者：
Zhong Wenjian
DOI：
10.1111/j.1755-6724.2011.00594.x
发表时间：
2011-12
期刊：
Acta Geologica Sinica ‐ English Edition
影响因子：
--
作者：
Huahua Cao;Wenliang Xu;F. Pei;Xingzhou Zhang
通讯作者：
Huahua Cao;Wenliang Xu;F. Pei;Xingzhou Zhang
影响因子：
3.5
作者：
G. Morrison
通讯作者：
G. Morrison
影响因子：
3.5
作者：
R. Gill;A. Aparicio;M. E. Azzouzi;Jean Hernandez;M. Thirlwall;J. Bourgois;G. F. Marriner
通讯作者：
R. Gill;A. Aparicio;M. E. Azzouzi;Jean Hernandez;M. Thirlwall;J. Bourgois;G. F. Marriner