Intra-oceanic arc accretion along Northeast Asia during Early Cretaceous provides a plate tectonic context for North China craton destruction
Intra-oceanic arc accretion along Northeast Asia during Early Cretaceous provides a plate tectonic context for North China craton destruction
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DOI：
10.1016/j.earscirev.2022.103952
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发表时间：
2022-02
影响因子：
12.1
通讯作者：
Jeremy Tsung Jui Wu;Jonny Wu;K. Okamoto
中科院分区：
文献类型：
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作者：
Jeremy Tsung Jui Wu;Jonny Wu;K. Okamoto
华北克拉通破坏（即，NCC破坏）通常被认为是在欧亚大陆东部之下的Izanagi /古太平洋板块（即，安第斯式俯冲）。然而，地质证据表明，早白垩世期间沿沿着欧亚大陆东部的洋内弧增生与安第斯式板块构造不相容。在这里，我们回顾了海洋沉积物增生沿着亚洲东北部在白垩纪时期发表的岩浆作用，地层学和古地磁。我们综合了早白垩世（130-100 Ma）在~15-40° N纬度之间的另一种“洋内俯冲”式的东北亚板块构造模式，并讨论了NCC破坏的意义。众所周知的东北亚岩浆活动在侏罗纪期间向中国东北向内迁移>1000 km，然后在早白垩世（140-110 Ma）期间向外迁移>1000 km。早白垩世东北亚洲火成岩包括：（1）弧型火成岩，（2）日本和锡霍特-阿林地区132-99 Ma埃达克岩，（3）中国东北地区145-120 Ma富钾埃达克岩。大致同时代的这些时期（130至100马），洋内弧增生历时沿着Sambagawa带，日本西南部，Oku-Niikappu带，日本东北部，和Kema和Kiselevka-Manoma，俄罗斯远东。根据埃达克岩的地球化学特征和弧增生与埃达克岩的时空重叠关系，我们认为中国东北地区的埃达克岩起源于下NCC地壳熔融，而日本Sikhote Alin地区的埃达克岩则起源于大洋板片熔融。我们发现，欧亚大陆东部西北泛海板块构造在早白垩世是更复杂的比一般公认的，涉及洋内俯冲带和多个大洋板块。早白垩世时期的亚洲东北埃达克岩是在140-110 Ma的板片回滚和130-100 Ma的洋内弧增生过程中，在地幔温度升高的条件下形成的。在这些事件中侵位的海洋地幔取代了NCC次大陆岩石圈地幔与更多的年轻地幔在最后的NCC破坏在115马。这里提供的更完整的板块构造图表明，依赖于简单的安第斯式俯冲的NCC破坏模型可能过于简化。相反，未来的NCC破坏研究应该包括更复杂的地球动力学与洋内俯冲和额外的板块，将改变边界条件的地球动力学建模，岩石成因和岩浆混合模型。
North China craton destruction (i.e., NCC destruction) during the Early Cretaceous is typically considered within the context of continuous, westward subduction of the Izanagi /paleo-Pacific plate beneath eastern Eurasia (i.e., Andean-style subduction). However, geological evidence indicates intra-oceanic arc accretions along east Eurasia during the Early Cretaceous that are incompatible with Andean-style plate tectonics. Here we review oceanic terrane accretions along NE Asia during Cretaceous times from published magmatism, stratigraphy, and paleomagnetism. We synthesize an alternative ‘intra-oceanic subduction’-style NE Asian plate tectonic model between ~15–40° N latitudes during the Early Cretaceous (130–100 Ma) and discuss implications for NCC destruction.Well-known NE Asian magmatism migrated >1000 km inboard to NE China during the Jurassic, and then >1000 km outboard during early Cretaceous (140–110 Ma). Early Cretaceous NE Asian igneous rocks include: (1) arc-related igneous rocks, (2) 132–99 Ma adakites in Japan and Sikhote-Alin, and (3) 145–120 Ma K-rich adakites in NE China. Roughly co-eval to these periods (130 to 100 Ma), intra-oceanic arcs accreted diachronously along the Sambagawa belts, SW Japan, Oku-Niikappu belts, NE Japan, and Kema and Kiselevka-Manoma, Russian Far East. Based on the adakite geochemistry and spatiotemporal overlap between the arc accretions and adakites, we link the NE China adakites to lower NCC crustal melting, whereas the Japan-Sikhote Alin adakites originated from oceanic slab melting. We show that eastern Eurasia-NW Panthalassan plate tectonics during the Early Cretaceous was more complex than generally recognized, involving intra-oceanic subduction zones and multiple oceanic plates. The Early Cretaceous-aged NE Asian adakites were generated within elevated mantle geotherms during 140–110 Ma slab rollback and 130–100 Ma intra-oceanic arc accretions. Oceanic mantle emplaced during these events replaced the NCC subcontinental lithospheric mantle with more juvenile mantle during final NCC destruction at 115 Ma. The more complete plate tectonic picture provided here suggests that NCC destruction models that rely on straightforward Andean-style subduction are likely oversimplified. Instead, future NCC destruction studies should include more complex geodynamics with intra-oceanic subduction and additional plates that will alter boundary conditions for geodynamic modeling, petrogenesis, and magmatic mixing models.