Sources and petrogenesis of late triassic dolerite dikes in the liaodong peninsula: Implications for post-collisional lithosphere thinning of the eastern North China Craton
文献类型：期刊论文
| 作者 | Yang, Jin-Hui; Sun, Jin-Feng; Chen, Fukun; Wilde, Simon A.; Wu, Fu-Yuan |
| 刊名 | JOURNAL OF PETROLOGY
 |
| 出版日期 | 2007-10-01 |
| 卷号 | 48期号:10页码:1973-1997 |
| ISSN号 | 0022-3530 |
| 关键词 | mafic dike asthenospheric mantle lithospheric mantle delamination North China Craton |
| 文献子类 | Article |
| 英文摘要 | A combination of major and trace element, whole-rock Sr, Nd and Hf isotope, and zircon U-Pb isotopic data are reported for a suite of dolerite dikes from the Liaodong Peninsula in the northeastern North China Craton. The study aimed to investigate the source, petrogenesis and tectonic setting of the dikes. Sensitive high-resolution ion microprobe U-Pb zircon analyses yield a LateTriassic emplacement age of similar to 213 Ma for these dikes, post-dating the collision between the North China and Yangtze cratons and consequent ultrahigh-pressure metamorphism. Three geochemical groups of dikes have been identified in the Liaodong Peninsula based on their geochemical and Sr-Nd-Hf isotope characteristics. Group 1 dikes are tholeiitic, with high TiO2 and total Fe2O3 and low MgO contents, absent to weak negative Nb and Ta anomalies, variable (Sr-87/Sr-86)(i) (0.7060-0.7153), epsilon(Nd)(t) (-0.8 to -6.5) and epsilon(Hf)(t) (-2.7 to -7.8) values, and negative Delta epsilon(Hf)(t) (-1.1 to -7.8). They are inferred to be derived from partial melting of a relatively fertile asthenospheric mantle in the spinel stability field, with some upper crustal assimilation and fractional crystallization. Group 2 dikes have geochemical features of high-Mg andesites with (Sr-87/Sr-86)(i) values of 0.7063-0.7072, and negative epsilon(Nd)(t) (-3.0 to -9.5) and epsilon(Hf)(t) (-3.2 to -10.1) values, and may have originated as melts of foundered lower crust, with subsequent interaction with mantle peridotite. Group 3 dikes are shoshonitic in composition with relatively low (Sr-87/Sr-86)(i) values (0.7061-0.7063), and negative epsilon Nd(t) (-13.2 to -13.4) and epsilon(Hf)(t) (-11.0 to -11.5) values, and were derived by partial melting of an ancient, re-enriched, refractory lithospheric mantle in the garnet stability field. The geochemical and geochronological data presented here indicate that Late Triassic magmatism occurred in an extensional setting, most probably related to post- orogenic lithospheric delamination. |
| WOS关键词 | HIGH-MG ANDESITES ; ENERGY-CONSTRAINED ASSIMILATION ; SETOUCHI VOLCANIC BELT ; SR ISOTOPIC EVIDENCE ; SULU OROGENIC BELT ; PB ZIRCON AGES ; U-PB ; CONTINENTAL-CRUST ; ULTRAHIGH-PRESSURE ; FRACTIONAL CRYSTALLIZATION |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | OXFORD UNIV PRESS |
| WOS记录号 | WOS:000249823100005 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/68472]  |
| 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 Lithospheric Evolut, Beijing 100029, Peoples R China 2.Curtin Univ Technol, Dept Appl Geol, Perth, WA, Australia |
| 推荐引用方式 GB/T 7714 | Yang, Jin-Hui,Sun, Jin-Feng,Chen, Fukun,et al. Sources and petrogenesis of late triassic dolerite dikes in the liaodong peninsula: Implications for post-collisional lithosphere thinning of the eastern North China Craton[J]. JOURNAL OF PETROLOGY,2007,48(10):1973-1997. |
| APA | Yang, Jin-Hui,Sun, Jin-Feng,Chen, Fukun,Wilde, Simon A.,&Wu, Fu-Yuan.(2007).Sources and petrogenesis of late triassic dolerite dikes in the liaodong peninsula: Implications for post-collisional lithosphere thinning of the eastern North China Craton.JOURNAL OF PETROLOGY,48(10),1973-1997. |
| MLA | Yang, Jin-Hui,et al."Sources and petrogenesis of late triassic dolerite dikes in the liaodong peninsula: Implications for post-collisional lithosphere thinning of the eastern North China Craton".JOURNAL OF PETROLOGY 48.10(2007):1973-1997. |
入库方式： OAI收割
来源：地质与地球物理研究所
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