The morphotectonics and its evolutionary dynamics of the central Southwest Indian Ridge (49° to 51°E)
文献类型：CNKI期刊论文
| 作者 | LIANG Yuyang; LI Jiabiao; LI Shoujun; RUAN Aiguo; NI Jianyu; YU Zhiteng; ZHU Lei |
| 发表日期 | 2013-12-15 |
| 出处 | Acta Oceanologica Sinica
 |
| 关键词 | ultra-slow spreading multibeam bathymetry morphotectonics oceanic core complex Southwest Indian Ridge |
| 英文摘要 | The morphotectonic features and their evolution of the central Southwest Indian Ridge(SWIR)are discussed on the base of the high-resolution full-coverage bathymetric data on the ridge between 49°–51°E.A comparative analysis of the topographic features of the axial and flank area indicates that the axial topography is alternated by the ridge and trough with en echelon pattern and evolved under a spatial-temporal migration especially in 49°–50.17°E.It is probably due to the undulation at the top of the mantle asthenosphere,which is propagating with the mantle flow.From 50.17°to 50.7°E,is a topographical high terrain with a crust much thicker than the global average of the oceanic crust thickness.Its origin should be independent of the spreading mechanism of ultra-slow spreading ridges.The large numbers of volcanoes in this area indicate robust magmatic activity and may be related to the Crozet hot spot according to RMBA(residual mantle Bouguer anomaly).The different geomorphological feature between the north and south flanks of the ridge indicates an asymmetric spreading,and leading to the development of the OCC(oceanic core complex).The tectonic activity of the south frank is stronger than the north and is favorable to develop the OCC.The first found active hydrothermal vent in the SWIR at 37°47′S,49°39′E is thought to be associated with the detachment fault related to the OCC. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | The National Natural Science Foundation of China under contract No.91028006 ; the Dayang 115 under contract No.DYXM115-02-3-01 |
| 卷 | v.32期:12页:89-97 |
| 语种 | 英文; |
| 分类号 | P736 |
| ISSN号 | 0253-505X |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/190621]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.InstituteofOceanology,ChineseAcademyofSciences 2.UniversityofChineseAcademyofSciences 3.KeyLaboratoryofSubmarineGeosciences,theSecondInstituteofOceanography,StateOceanicAdministration 4.ChinaOceanMineralResourcesResearchandDevelopmentAssociation |
| 推荐引用方式 GB/T 7714 | LIANG Yuyang,LI Jiabiao,LI Shoujun,et al. The morphotectonics and its evolutionary dynamics of the central Southwest Indian Ridge (49° to 51°E). 2013. |
入库方式： OAI收割
来源：海洋研究所
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