Multiple sources for the origin of granites: Geochemical and Nd/Sr isotopic evidence from the Gudaoling granite and its mafic enclaves, northeast China
文献类型：期刊论文
| 作者 | Yang, JH; Wu, FY; Chung, SL; Wilde, SA; Chu, MF |
| 刊名 | GEOCHIMICA ET COSMOCHIMICA ACTA
 |
| 出版日期 | 2004-11-01 |
| 卷号 | 68期号:21页码:4469-4483 |
| 关键词 | mafic microgranular enclave origin for granites magma mixing Sr-Nd isotopes China |
| ISSN号 | 0016-7037 |
| DOI | 10.1016/j.gca.2004.04.015 |
| 文献子类 | Article |
| 英文摘要 | Geochemical and Sr- and Nd-isotopic data have been determined for mafic to intermediate microgranular enclaves and host granitoids from the Early Cretaceous Gudaoling batholith in the Liaodong Peninsula, NE China. The rocks include monzogranite, porphyric granodiorite and quartz diorite. Monzogranites have relatively high (87) Rb/Sr-86 ratios (0.672-0.853), low initial Sr-87/(86) Sr ratios (0.7052-0.7086) and epsilon (Nd)(t) values (-18.5 to -20.9) indicating that they were mainly derived from a newly underplated crustal source with a short crustal residence time. Quartz diorites have high initial Sr-87/Sr-86 ratios (0.7118-0.7120) and negative epsilon(Nd)(t) values (- 13.2 to - 18.1) coupled with high Al2O3 and MgO contents, indicating they were derived from enriched lithospheric mantle with contributions of radiogenic Sr from plagioclase-rich metagreywackes or meta-igneous rocks, i.e., ancient lower crust. Two groups of enclaves with igneous textures and abundant acicular apatites are distinguished: dioritic enclaves and biotite monzonitic enclaves. Dioritic enclaves have low AI(2)O(3) (13.5-16.4 wt%) and high MgO (Mg# = similar to72.3) concentrations, low initial Sr-87/(86) 16 Sr ratios (0.7058-0.7073) and negative epsilon(Nd)(t) values (similar to-7.2), and are enriched in LILEs and LREEs and depleted in HFSEs, suggesting they were derived from an enriched lithospheric mantle source. Biotite monzonitic enclaves have Sr and Nd isotopic compositions similar to the monzogranites, indicating they were crystal cumulates of the parental magmas of these monzogranites. Granodiorites have transitional geochemistry and Nd- and Sr-isotopic compositions, intermediate between the monzogranites, quartz diorites and the enclaves. |
| WOS关键词 | LACHLAN FOLD BELT ; MICROGRANITOID ENCLAVES ; SOUTHEASTERN AUSTRALIA ; LITHOSPHERIC MANTLE ; CONTINENTAL-CRUST ; MAGMA ; ROCKS ; CONSTRAINTS ; EVOLUTION ; CRATON |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000224698000013 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/64299]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Yang, JH |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Natl Taiwan Univ, Dept Geosci, Taipei, Taiwan 3.Curtin Univ Technol, Dept Appl Geol, Perth, WA 6845, Australia |
| 推荐引用方式 GB/T 7714 | Yang, JH,Wu, FY,Chung, SL,et al. Multiple sources for the origin of granites: Geochemical and Nd/Sr isotopic evidence from the Gudaoling granite and its mafic enclaves, northeast China[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2004,68(21):4469-4483. |
| APA | Yang, JH,Wu, FY,Chung, SL,Wilde, SA,&Chu, MF.(2004).Multiple sources for the origin of granites: Geochemical and Nd/Sr isotopic evidence from the Gudaoling granite and its mafic enclaves, northeast China.GEOCHIMICA ET COSMOCHIMICA ACTA,68(21),4469-4483. |
| MLA | Yang, JH,et al."Multiple sources for the origin of granites: Geochemical and Nd/Sr isotopic evidence from the Gudaoling granite and its mafic enclaves, northeast China".GEOCHIMICA ET COSMOCHIMICA ACTA 68.21(2004):4469-4483. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。