Magnetic anomaly map of Ori Massif and its implications for oceanic plateau formation
文献类型：期刊论文
| 作者 | Zhang, Jinchang2; Huang, Yanming6; Sager, William W.; Greene, John A.; Tominaga, Masako; Nakanishi, Masao5 |
| 刊名 | EARTH AND PLANETARY SCIENCE LETTERS
 |
| 出版日期 | 2018 |
| 卷号 | 501页码:46 |
| 关键词 | Shatsky Rise oceanic plateau mid-ocean ridge submarine volcanism magnetic anomaly |
| ISSN号 | 0012-821X |
| DOI | 10.1016/j.epsl.2018.08.029 |
| 英文摘要 | Many oceanic plateaus have been emplaced at or adjacent to mid-ocean ridges. To explain plateau volume and thickened crust compared to normal oceanic crust, hotspot-ridge interaction is commonly assumed, but the manner of interaction remains unclear. The Shatsky Rise oceanic plateau is a large volcanic mountain that formed at a triple junction during Late Jurassic and Early Cretaceous time. Recent drilling and seismic investigations suggest that the intermediate edifice in the rise, Ori Massif, is a central volcano. Paradoxically, magnetic lineations were traced across parts of Ori Massif, implying formation at a spreading ridge. In this study, we examined magnetic anomalies over and around Ori Massif to obtain insights about the formation of this volcanic edifice. Magnetic data from 21 cruises were corrected, combined, and gridded to construct a magnetic anomaly map. Forward and inverse magnetic modeling was done to investigate the magnetic structure of Ori Massif. The results imply that this large volcanic edifice is predominantly characterized by linear magnetic anomalies resulting from alternating normal and reversed polarity magnetization blocks, analogous to magnetic anomalies recorded by spreading-ridges. This magnetic structure is not expected for a central volcano that was built by long runout lava flows, implying that Ori Massif eruptions must have been constrained near the ridge axis. Magnetic bights on the north and south boundaries of Ori Massif imply that it was bracketed by triple junctions, indicating complex ridge tectonics during the formation of Shatsky Rise. The surprising finding that Ori Massif is traversed by coherent linear magnetic anomalies indicates that oceanic plateaus can record seafloor spreading magnetic anomalies despite large crustal thickness. Other oceanic plateaus also record linear magnetic anomalies, implying a link between divergent plate boundaries and oceanic plateau volcanism. (C) 2018 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/17677]  |
| 专题 | 南海海洋研究所_中科院边缘海地质重点实验室 |
| 作者单位 | 1.Sager, William W.] Univ Houston, Dept Earth & Atmospher Sci, Houston, TX 77204 USA 2.Tominaga, Masako; Greene, John A.] Texas A&M Univ, Dept Geol & Geophys, College Stn, TX 77843 USA 3.Ocean Univ China, Coll Marine Geosci, Qingdao 266100, Peoples R China 4.Chiba Univ, Grad Sch Sci, Inage Ku, 1-33 Yayoi Cho, Chiba, Chiba 2638522, Japan 5.Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China 6.Texas A&M Univ, Dept Oceanog, College Stn, TX 77843 USA |
| 推荐引用方式 GB/T 7714 | Zhang, Jinchang,Huang, Yanming,Sager, William W.,et al. Magnetic anomaly map of Ori Massif and its implications for oceanic plateau formation[J]. EARTH AND PLANETARY SCIENCE LETTERS,2018,501:46, 55. |
| APA | Zhang, Jinchang,Huang, Yanming,Sager, William W.,Greene, John A.,Tominaga, Masako,&Nakanishi, Masao.(2018).Magnetic anomaly map of Ori Massif and its implications for oceanic plateau formation.EARTH AND PLANETARY SCIENCE LETTERS,501,46. |
| MLA | Zhang, Jinchang,et al."Magnetic anomaly map of Ori Massif and its implications for oceanic plateau formation".EARTH AND PLANETARY SCIENCE LETTERS 501(2018):46. |
入库方式： OAI收割
来源：南海海洋研究所
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。