Mesozoic decratonization of the North China block
文献类型：期刊论文
| 作者 | Yang, Jin-Hui1; Wu, Fu-Yuan1; Wilde, Simon A.2; Belousova, Elena3; Griffin, William L.3 |
| 刊名 | GEOLOGY
 |
| 出版日期 | 2008-06-01 |
| 卷号 | 36期号:6页码:467-470 |
| 关键词 | decratonization Phanerozoic crustal growth North China craton zircon Hf isotope magmatism |
| ISSN号 | 0091-7613 |
| DOI | 10.1130/G24518A.1 |
| 文献子类 | Article |
| 英文摘要 | Cratons are old, stable parts of the continental crust that have survived at least since Proterozoic time and have not undergone strong magmatism or tectonism since their stabilization. Traditionally, the growth of continental crust in the North China craton is considered to have been complete by Paleoproterozoic time, Phanerozoic events being largely restricted to surrounding orogenic belts. However, the eastern part of the North China craton contains large volumes of Mesozoic igneous rocks, with widespread metamorphic core complexes and pull-apart basins. Hf isotope compositions of magmatic zircon grains from igneous rocks in the Liaodong Peninsula indicate that widespread late Mesozoic granitoids formed by partial melting of ancient crust, but with significant input of a mantle component via magma mixing and crustal assimilation. This magmatism has resulted from removal and modification of lithospheric mantle, accompanied by asthenospheric upwelling. The Hf isotopic signatures thus record the addition of juvenile crust beneath the eastern part of the North China craton, which appears related to major extension and possibly slab rollback of the Pacific plate. Whatever the mechanism, it is apparent that since ca. 200 Ma, ancient lithosphere beneath the eastern North China craton has been progressively reactivated and replaced, resulting in "decratonization." Tertiary to Holocene volcanism in the area and major subsidence around the Gulf of Bohai suggest that the effects of the process are continuing. Similar processes probably operated in the geological past, leading to significant modification of continental crust and requiring reconsideration of mechanisms for continental breakup and dispersal and of continental growth rates. |
| WOS关键词 | LIAODONG PENINSULA ; CONTINENTAL-CRUST ; HF ISOTOPES ; CRATON ; ZIRCON ; EVOLUTION ; MANTLE ; CONSTRAINTS ; PETROGENESIS ; LITHOSPHERE |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000256389500009 |
| 出版者 | GEOLOGICAL SOC AMER, INC |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/69590]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Yang, Jin-Hui |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Curtin Univ Technol, Dept Appl Geol, Perth, WA 6845, Australia 3.Macquarie Univ, Dept Earth & Planetary Sci, Natl Key Ctr Geochem Evolut & Metallogeny Contine, Australian Res Council, N Ryde, NSW 2109, Australia |
| 推荐引用方式 GB/T 7714 | Yang, Jin-Hui,Wu, Fu-Yuan,Wilde, Simon A.,et al. Mesozoic decratonization of the North China block[J]. GEOLOGY,2008,36(6):467-470. |
| APA | Yang, Jin-Hui,Wu, Fu-Yuan,Wilde, Simon A.,Belousova, Elena,&Griffin, William L..(2008).Mesozoic decratonization of the North China block.GEOLOGY,36(6),467-470. |
| MLA | Yang, Jin-Hui,et al."Mesozoic decratonization of the North China block".GEOLOGY 36.6(2008):467-470. |
入库方式： OAI收割
来源：地质与地球物理研究所
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