Geochemical characteristics of Shatsky Rise Cretaceous basalts and implication on the interaction between mantle plume and mid-ocean ridge
文献类型：期刊论文
| 作者 | Chen Jing2,3; Chen ShuangShuang1,2,3; Gao Rui2,3; Liu Jiaqi1 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2023-08-01 |
| 卷号 | 39期号:8页码:2379-2401 |
| 关键词 | Sr-Nd-Pb isotope Tholeiite Mantle plume Three-direction spreading Shatsky Rise |
| ISSN号 | 1000-0569 |
| DOI | 10.18654/1000-0569/2023.08.09 |
| 英文摘要 | Shatsky Rise is a large igneous province in the Northwest Pacific that was formed in the Early Cretaceous, and its formation genesis and evolution process are still controversial. This study analyzes the bulk-rock major elements, trace elements, and Sr-Nd-Pb isotopic compositions of Shatsky Rise Cretaceous basalts. Shatsky Rise volcanic rocks mainly belong to tholeiite and are characterized by the depletion of large ion lithophile elements and light rare earth elements (LREEs), the enrichment of heavy rare earth elements (HREEs), and the absence of obvious Eu anomaly (delta Eu =0. 99 similar to 1. 29), which is similar to the distribution pattern of normal mid-ocean ridge basalt (N-MORB). However, these basalts have relatively enriched Sr-87/Sr-86 (0. 702986 similar to 0. 703991) and Nd-143/Nd-144 (0. 513034 similar to 0. 513194) isotopic ratios, and relatively enriched Pb-207/Pb-204 (15. 439 15. 508) and Pb-208/Pb-204 (37. 853 similar to 38. 488) isotopic ratios, which are similar to the isotopic compositions of enriched ocean island basalt (OIB) and island arc volcanic rocks, and have the involvement of enriched mantle components with high U/Pb ratio (HIMU). The REE partial melting model proves that Shatsky Rise volcanic rocks may originate from a relatively shallow magma source where the spinet iherzolite exists stably, and experience a relatively high degree of partial melting (> 10%). We attempt to use the mantle plume-mid ocean ridge interaction model to explain the special geochemical characteristics of Shatsky Rise volcanic rocks with the depleted incompatible element compositions and enriched isotopic compositions. Due to the influence of strong ridge tensile forces, the mantle plume magma would flow to the ridge axis and undergo decompression melting, resulting in the depletion of the highly incompatible elements but the invariability of the isotopic compositions due to the relatively long half-life of the radiogenic elements (Sm, Rb, and U). We speculate that these Shatsky Rise isotopically enriched N-MORB-type tholeiites may be an exclusive product of a mid-ocean ridge-mantle plume interaction. |
| WOS关键词 | NORTHWEST PACIFIC-OCEAN ; ONTONG JAVA PLATEAU ; MID-ATLANTIC RIDGE ; TRIPLE JUNCTION ; TRACE-ELEMENT ; FLOOD BASALTS ; TAMU MASSIF ; N-MORB ; DISCRIMINATION ; SEAMOUNTS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001044588700009 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/111393]  |
| 专题 | 地质与地球物理研究所_中国科学院新生代地质与环境重点实验室 |
| 通讯作者 | Chen ShuangShuang |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China 2.Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangzhou 510275, Peoples R China 3.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen Jing,Chen ShuangShuang,Gao Rui,et al. Geochemical characteristics of Shatsky Rise Cretaceous basalts and implication on the interaction between mantle plume and mid-ocean ridge[J]. ACTA PETROLOGICA SINICA,2023,39(8):2379-2401. |
| APA | Chen Jing,Chen ShuangShuang,Gao Rui,&Liu Jiaqi.(2023).Geochemical characteristics of Shatsky Rise Cretaceous basalts and implication on the interaction between mantle plume and mid-ocean ridge.ACTA PETROLOGICA SINICA,39(8),2379-2401. |
| MLA | Chen Jing,et al."Geochemical characteristics of Shatsky Rise Cretaceous basalts and implication on the interaction between mantle plume and mid-ocean ridge".ACTA PETROLOGICA SINICA 39.8(2023):2379-2401. |
入库方式： OAI收割
来源：地质与地球物理研究所
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