Tectonic nature, subduction, and closure of the Mudanjiang Ocean: Insights from newly discovered oceanic fragments in the Luobei Heilongjiang Complex
文献类型：期刊论文
| 作者 | Yu, Guan-Ying2; Yang, Hao2,3; Jing, Jia-Hao1; Ding, Xin2; Ji, Zheng2; Zhang, Yan-Long2; Dong, Yu2; Ge, Wen-chun2 |
| 刊名 | LITHOS
 |
| 出版日期 | 2023-06-01 |
| 卷号 | 446页码:16 |
| 关键词 | Metabasic rocks Heilongjiang Complex Geochronology and geochemistry Mudanjiang Ocean Paleo-Pacific Ocean |
| ISSN号 | 0024-4937 |
| DOI | 10.1016/j.lithos.2023.107141 |
| 英文摘要 | The Mudanjiang Ocean was a paleo-ocean located between the Jiamusi and Songnen blocks in the eastern Central Asian Orogenic Belt (CAOB). Understanding its opening and closure is crucial to unravelling the subduction of the Paleo-Pacific oceanic crust and the final amalgamation of Northeast (NE) China. However, the tectonic nature and duration of the subduction in the Mudanjiang Ocean have long been debated. We present new zircon SIMS U-Pb ages, whole-rock major and trace element compositions, and Sr-Nd isotopic data for the metabasic rocks of the Heilongjiang Complex in the Luobei area, NE China, to determine their rock types, protolith and metamorphic ages, petrogenesis, and tectonic setting. Geochemically, the metabasic rocks can be divided into two types: tholeiitic N-MORB-like metabasalt with high positive & epsilon;Nd(t) values (+8.7 to +9.3), and alkaline OIBlike metagabbro and metabasalt with relatively low positive & epsilon;Nd(t) values (+7.4 to +7.7). Zircon SIMS U-Pb dating and mineral electron microprobe analyses show that the metabasic rocks crystallized during the late Permian-Early Jurassic (256-181 Ma) and experienced high-pressure metamorphism starting in the Late Triassic (ca. 222 Ma). Whole-rock geochemical and Sr-Nd isotopic data indicate that the tholeiitic N-MORB-like rocks were derived from low-degree (5%-20%) partial melting of a depleted mantle source in the spinel stability field, whereas the alkaline OIB-like rocks were generated from the partial melting of a relatively enriched mantle source in the garnet stability field. Their primary magmas underwent olivine and clinopyroxene fractionation with negligible crustal contamination during ascent. Our new data suggest that the OIB- and MORB-like rocks formed on the Mudanjiang oceanic plate rather than in a continental rift setting between the Songnen and Jiamusi blocks as previously thought. Integrating pre-existing data on magmatic arc migration and high-pressure metamorphism, we propose that the Mudanjiang Ocean opened as a branch of the Paleo-Pacific Ocean no later than the early Permian, experienced westward subduction between ca. 222 and 172 Ma, and eventually closed at 172-165 Ma. |
| WOS关键词 | ZIRCON U-PB ; NE CHINA CONSTRAINTS ; ZHANGGUANGCAI RANGE MASSIFS ; ASIAN OROGENIC BELT ; NORTHEASTERN CHINA ; JIAMUSI MASSIF ; GEOCHEMICAL CONSTRAINTS ; CONTINENTAL-CRUST ; MAFIC INTRUSIONS ; HF ISOTOPES |
| 资助项目 | National Natural Science Foundation of China[42072064] ; National Natural Science Foundation of China[41802049] ; National Natural Science Foundation of China[42073055] ; National Postdoctoral Program for Innovative Talents[BX201700095] |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:001055192300001 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents ; National Postdoctoral Program for Innovative Talents |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/111415]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Yang, Hao |
| 作者单位 | 1.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Northern Taibai St 229, Xian 710069, Peoples R China 2.Jilin Univ, Coll Earth Sci, Changchun 130061, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, POB 9825, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Guan-Ying,Yang, Hao,Jing, Jia-Hao,et al. Tectonic nature, subduction, and closure of the Mudanjiang Ocean: Insights from newly discovered oceanic fragments in the Luobei Heilongjiang Complex[J]. LITHOS,2023,446:16. |
| APA | Yu, Guan-Ying.,Yang, Hao.,Jing, Jia-Hao.,Ding, Xin.,Ji, Zheng.,...&Ge, Wen-chun.(2023).Tectonic nature, subduction, and closure of the Mudanjiang Ocean: Insights from newly discovered oceanic fragments in the Luobei Heilongjiang Complex.LITHOS,446,16. |
| MLA | Yu, Guan-Ying,et al."Tectonic nature, subduction, and closure of the Mudanjiang Ocean: Insights from newly discovered oceanic fragments in the Luobei Heilongjiang Complex".LITHOS 446(2023):16. |
入库方式： OAI收割
来源：地质与地球物理研究所
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