Major transition of continental basalts in the Early Cretaceous: Implications for the destruction of the North China Craton
文献类型：期刊论文
| 作者 | Wu, Kai1,6; Ling, Ming-Xing2,5; Sun, Weidong3,4,5 ; Guo, Jia1,6; Zhang, Chan-Chan1,6
|
| 刊名 | CHEMICAL GEOLOGY
 |
| 出版日期 | 2017-10-20 |
| 卷号 | 470页码:93-106 |
| 关键词 | Ridge Subduction Alkali Basalt The Pacific Plate North China Craton Lithosphere Thinning |
| DOI | 10.1016/j.chemgeo.2017.08.025 |
| 文献子类 | Article |
| 英文摘要 | Geochemical compositions of continental basalts are generally considered as the best proxy record of the chemical and isotopic evolution of subcontinental lithosphere and convective mantle. There are voluminous Cretaceous continental basalts in the North China Craton (NCC), which are mainly composed of alkali basalts with minor sub-alkali basalts. Abrupt changes in chemical and isotopic compositions of these basalts were often ascribed to subcontinental lithosphere thinning of the NCC. However, processes responsible for such changes and its implications for subcontinental lithosphere evolution remain obscure. Here we report major geochemical changes at similar to 108 Ma in the north part of the NCC. The > 108 Ma alkali basalts are characterized by negative epsilon(Nd)(t) and declining "island arc-like" geochemical characteristics from the east to the west, implying decreasing slab-derived components from westward subducting slabs in their metasomatized lithospheric mantle sources. In contrast, the < 108 Ma Cretaceous alkali basalts have depleted Sr-Nd isotopic compositions and "OIB-like" geochemical features. These observations suggest that westward subduction of the Paleo-Pacific plate was responsible for the Cretaceous basaltic activities in the NCC. Combined with plate reconstructions and geophysical observations, we propose that flat subduction of the "extinct" ridge between the Izanagi and the Pacific plates controlled this major transition as well as the destruction of the NCC. The transition from a supra-subduction zone environment to a within-plate extensional environment around 108 Ma is probably due to the eastward slab rollback and the northward shift of the spreading ridge. |
| 语种 | 英语 |
| WOS记录号 | WOS:000412550700007 |
| 版本 | 出版稿 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/143200]  |
| 专题 | 海洋研究所_深海极端环境与生命过程研究中心 |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangzhou 510640, Guangdong, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Guangdong, Peoples R China 3.Chinese Acad Sci, Inst Oceanog, Ctr Deep Sea Res, Qingdao 266071, Peoples R China 4.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266237, Peoples R China 5.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Kai,Ling, Ming-Xing,Sun, Weidong,et al. Major transition of continental basalts in the Early Cretaceous: Implications for the destruction of the North China Craton[J]. CHEMICAL GEOLOGY,2017,470:93-106. |
| APA | Wu, Kai,Ling, Ming-Xing,Sun, Weidong,Guo, Jia,&Zhang, Chan-Chan.(2017).Major transition of continental basalts in the Early Cretaceous: Implications for the destruction of the North China Craton.CHEMICAL GEOLOGY,470,93-106. |
| MLA | Wu, Kai,et al."Major transition of continental basalts in the Early Cretaceous: Implications for the destruction of the North China Craton".CHEMICAL GEOLOGY 470(2017):93-106. |
入库方式： OAI收割
来源：海洋研究所
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