Early Mesozoic alkaline complexes in the northern North China Craton: Implications for cratonic lithospheric destruction
Early Mesozoic alkaline complexes in the northern North China Craton: Implications for cratonic lithospheric destruction
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华北克拉通北部早中生代碱性杂岩：克拉通岩石圈破坏的意义
DOI：
10.1016/j.lithos.2012.08.009
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发表时间：
2012-12
期刊：
影响因子：
3.5
通讯作者：
Li Chao-Feng
中科院分区：
文献类型：
--
作者：
Zhang Shuan-Hong;Zhao Yue;Ye Hao;Hou Ke-Jun;Li Chao-Feng
华北北方造山带早中生代碱性侵入杂岩分布广泛，沿中朝北方造山带构成一条长达1500 km的东西向碱性岩浆带。对永福村、姚家庄和孙各庄碱性杂岩体的锆石和斜锆石U-Pb定年结果结合前人的年代学资料表明，华北克拉通北方中晚三叠世有东西向碱性带侵位，侵位时间约为235- 220 Ma。地球化学和Sr-Nd-Hf同位素数据表明，杂岩体中的正长岩、辉石正长岩和镁铁质岩具有共同的源区。它们主要来源于交代富集的岩石圈地幔，但在这些碱性复合体的形成过程中也有来自亏损软流圈地幔的物质参与。亏损软流圈地幔物质的参与表明，在早中生代，北方华北克拉通地区存在软流圈地幔上涌和软流圈-岩石圈地幔相互作用。北方华北克拉通岩石圈减薄和破坏开始于中晚三叠世，比华北克拉通其他地区晚中生代的减薄和破坏早得多。俯冲引起的岩石圈地幔底部的拆沉作用可能是北方华北克拉通早中生代岩石圈减薄和破坏的主要机制。晚古生代-中生代期间，华北克拉通北方、南方和东部的多次洋壳俯冲和周围造山作用的相互作用可能对华北克拉通晚中生代岩石圈的破坏起着重要作用。
Early Mesozoic alkaline intrusive complexes are widespread in the northern North China Craton (NCC) and constitute an E–W trending alkaline magmatic belt that is more than 1500km long along the northern Sino–Korean Craton. Our new zircon and baddeleyite U–Pb dating results of the Yongfucun, Yaojiazhuang and Sungezhuang alkaline complexes combined with previous geochronological data indicate emplacement of the E–W trending alkaline belt in the northern NCC during the Middle–Late Triassic at around 235–220Ma. Geochemical and Sr–Nd–Hf isotopic data suggest a common source region for the syenites, pyroxene syenites and mafic rocks within the complexes. They were mainly derived from a metasomatized enriched lithospheric mantle; however some materials from depleted asthenospheric mantle have been involved during formation of these alkaline complexes. Involvement of depleted asthenospheric mantle materials indicates upwelling of the asthenospheric mantle and asthenosphere–lithospheric mantle interaction in northern NCC during the Early Mesozoic. Initiation of lithospheric thinning and destruction of the northern NCC occurred in the Middle–Late Triassic, which is much earlier than in other parts of the NCC during the Late Mesozoic. Delamination at the root of the subduction-induced thick lithospheric mantle is likely main mechanism for the Early Mesozoic lithospheric thinning and destruction of the northern NCC. Multiple subduction of oceanic plates beneath the northern, southern and eastern parts of the NCC and interactions of the surrounding orogenesis during the Late Paleozoic to Mesozoic may play important roles on the Late Mesozoic lithospheric destruction of the NCC.
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影响因子：
3.9
作者：
Jin-Hui Yang;Sun‐Lin Chung;S. Wilde;Fu-Yuan Wu;M. Chu;C. Lo;H. Fan
通讯作者：
Jin-Hui Yang;Sun‐Lin Chung;S. Wilde;Fu-Yuan Wu;M. Chu;C. Lo;H. Fan
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影响因子：
2.3
作者：
YB Zhang;HF Zhang;Jinghui GUo;Mingguo Zhai;Peng Peng
通讯作者：
Peng Peng
影响因子：
3.5
作者：
Shuan‐Hong Zhang;Yue Zhao;Xiaochun Liu;Dunyi Liu;Fukun Chen;Liewen Xie;Haijiao Chen
通讯作者：
Shuan‐Hong Zhang;Yue Zhao;Xiaochun Liu;Dunyi Liu;Fukun Chen;Liewen Xie;Haijiao Chen
影响因子：
1.8
作者：
Zhang Hong
通讯作者：
Zhang Hong
影响因子：
4.9
作者：
J. Vidal-Solano;A. Demant;F. P. Moreno;H. Lapierre;M. Ortega-Rivera;James K. W. Lee
通讯作者：
J. Vidal-Solano;A. Demant;F. P. Moreno;H. Lapierre;M. Ortega-Rivera;James K. W. Lee