Asymmetric crustal structure of the ultraslow-spreading Mohns Ridge
文献类型：期刊论文
| 作者 | Gao, Jinyao2; Lin, Jian1,3; Zhang, Tao2 |
| 刊名 | INTERNATIONAL GEOLOGY REVIEW
 |
| 关键词 | Mohns Ridge vesteris plateau asymmetric crustal structure residual bathymetry residual mantle bouguer anomaly off-axis magmatism ridge flank tectonic uplift |
| ISSN号 | 0020-6814 |
| DOI | 10.1080/00206814.2019.1627586 |
| 英文摘要 | New analysis of the geophysical data of the ultraslow-spreading Mohns Ridge and its off-axis structure reveals a distinctive asymmetric structure. We calculate residual bathymetry (RB) and residual mantle Bouguer gravity anomaly (RMBA) and decompose the anomalies into symmetric and asymmetric components between the ridge conjugates. The western flank of the Mohns Ridge at crustal age of similar to 50-15 Ma is characterized by a broad zone of elevated RB and more negative RMBA, which we term the Vesteris Plateau (VP). The VP anomaly has a surface area of similar to 1.12 x 10(5) km(2) and an excess crust volume of similar to 2.33 x 10(5) km(3), making it a significant anomaly comparable to other anomalies such as the Bermuda Rise. Extending north of the Kolbeinsey Ridge for more than 500 km, the VP lies above an anomalous upper mantle region of low shear-wave seismic velocity, indicating that the VP might represent the northernmost reach of the Iceland-Jan Mayen mantle anomaly. In addition, the western ridge flank of the Mohns Ridge at crustal age of 6-0 Ma is associated with higher RB and more positive RMBA relative to the eastern conjugate, indicating tectonic uplift and associated exposure of lower crust and upper mantle near the ridge axis. |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/17952]  |
| 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.Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA 2.State Ocean Adm, Key Lab Submarine Geosci, Hangzhou, Zhejiang, Peoples R China 3.Minist Nat Resources, Inst Oceanog 2, Hangzhou, Zhejiang, Peoples R China 4.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Guangzhou, Guangdong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao, Jinyao,Lin, Jian,Zhang, Tao. Asymmetric crustal structure of the ultraslow-spreading Mohns Ridge[J]. INTERNATIONAL GEOLOGY REVIEW. |
| APA | Gao, Jinyao,Lin, Jian,&Zhang, Tao. |
| MLA | Gao, Jinyao,et al."Asymmetric crustal structure of the ultraslow-spreading Mohns Ridge".INTERNATIONAL GEOLOGY REVIEW |
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。