Petrogenesis and tectonic implication of the Late Mesozoic volcanic rocks in East Mongolia
文献类型：期刊论文
| 作者 | Bars, Amarjargal1,3; Miao, Laicheng1,2; Fochin, Zhang1,2; Baatar, Munkhtsengel4; Anaad, Chimedtseren4; Togtokh, Khasmaral1,3 |
| 刊名 | GEOLOGICAL JOURNAL
 |
| 出版日期 | 2018-11-01 |
| 卷号 | 53期号:6页码:2449-2470 |
| 关键词 | East Mongolia Late Mesozoic volcanic rock Mongol-Okhotsk suture Paleo-Pacific subduction |
| ISSN号 | 0072-1050 |
| DOI | 10.1002/gj.3080 |
| 英文摘要 | This paper presents new geochemical and geochronological data of the Late Mesozoic volcanic rocks in East Mongolia. These volcanic rocks belong to high-K calc-alkaline and shoshonitic series and exhibit features of bimodal rocks. The mafic rocks have elevated incompatible trace element concentrations and significantly negative Nb, Ta, and Ti anomalies, with Sr-87/Sr-86(i) and Nd-&(t) values of 0.70502-0.70572 and -1.72459 to +1.720736, respectively, which suggest that the mafic magma was derived from a lithospheric mantle source that might have been metasomatized by subduction-derived fluids, experienced fractional crystallization, and was contaminated by crustal materials. The felsic rocks have similar rare earth element patterns to the mafic rocks but show much more significantly negative Eu and Sr anomalies. The felsic rocks have higher Sr-87/Sr-86(i) values of 0.706496-0.71104 than the mafic rocks but similar Nd-&(t) values (-0.28003 to +2.928506) to the mafic ones. These data indicate that the felsic rocks originated from partial melting of a crustal source that is dominated by juvenile mafic rocks. Our new K-Ar dating, together with previous data, shows that the Late Mesozoic volcanism in East Mongolia took place during the Late Jurassic-Early Cretaceous between ca. 155 and 99 Ma. The model of back-arc extension, possibly induced by slab rollback of the westward subducted Pacific Plate and the subduction zone retreat, can explain the geodynamic setting and the eastward younging trend of the Late Mesozoic volcanism in East Mongolia and in adjacent NE China. |
| WOS关键词 | GREAT XINGAN RANGE ; U-PB AGES ; NE CHINA CONSTRAINTS ; DA-HINGGAN MOUNTAINS ; LITHOSPHERIC EXTENSION ; INNER-MONGOLIA ; CRUSTAL GROWTH ; OROGENIC BELT ; OKHOTSK OCEAN ; SIKHOTE-ALIN |
| 资助项目 | National Key R&D Program of China[2017YFC0601306] ; National Natural Science Foundation of China[41772230] ; National Natural Science Foundation of China[41702217] ; National Natural Science Foundation of China[41502217] ; Ministry of Science and Technology of China[2012FY120100] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000450653800004 |
| 出版者 | WILEY |
| 资助机构 | National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/89615]  |
| 专题 | 地质与地球物理研究所_中国科学院矿产资源研究重点实验室 |
| 通讯作者 | Miao, Laicheng |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Mongolian Univ Sci & Technol, Sch Geol & Min, Ulaanbaatar 14191, Mongol Peo Rep |
| 推荐引用方式 GB/T 7714 | Bars, Amarjargal,Miao, Laicheng,Fochin, Zhang,et al. Petrogenesis and tectonic implication of the Late Mesozoic volcanic rocks in East Mongolia[J]. GEOLOGICAL JOURNAL,2018,53(6):2449-2470. |
| APA | Bars, Amarjargal,Miao, Laicheng,Fochin, Zhang,Baatar, Munkhtsengel,Anaad, Chimedtseren,&Togtokh, Khasmaral.(2018).Petrogenesis and tectonic implication of the Late Mesozoic volcanic rocks in East Mongolia.GEOLOGICAL JOURNAL,53(6),2449-2470. |
| MLA | Bars, Amarjargal,et al."Petrogenesis and tectonic implication of the Late Mesozoic volcanic rocks in East Mongolia".GEOLOGICAL JOURNAL 53.6(2018):2449-2470. |
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。