The morphotectonics and its evolutionary dynamics of the central Southwest Indian Ridge (49 degrees to 51 degrees E)

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	The morphotectonics and its evolutionary dynamics of the central Southwest Indian Ridge (49 degrees to 51 degrees E)
	Liang Yuyang 1,2,3; Li Jiabiao 3; Li Shoujun 3; Ruan Aiguo 3; Ni Jianyu 3; Yu Zhiteng 3; Zhu Lei 4
刊名	ACTA OCEANOLOGICA SINICA
	2013-12-01
卷号	32 期号:12 页码:87-95
关键词	ultra-slow spreading multibeam bathymetry morphotectonics oceanic core complex Southwest Indian Ridge
ISSN号	0253-505X
通讯作者	Li, JB
中文摘要	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 degrees-51 degrees 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 degrees-50.17 degrees 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 degrees to 50.7 degrees 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 degrees 47'S, 49 degrees 39'E is thought to be associated with the detachment fault related to the OCC.
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 degrees-51 degrees 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 degrees-50.17 degrees 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 degrees to 50.7 degrees 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 degrees 47'S, 49 degrees 39'E is thought to be associated with the detachment fault related to the OCC.
学科主题	Oceanography
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Oceanography
研究领域[WOS]	Oceanography
关键词[WOS]	MID-ATLANTIC RIDGE ; SEA-FLOOR GENERATION ; CHINA SEA ; ACCRETIONARY WEDGE ; SPREADING RIDGES ; TECTONICS ; OCEAN ; 69-DEGREES-E ; BATHYMETRY ; MORPHOLOGY
收录类别	SCI
原文出处	10.1007/s13131-013-0394-1
语种	英语
WOS记录号	WOS:000328528400011
公开日期	2014-07-17
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/16319]
专题	海洋研究所_海洋地质与环境重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.State Ocean Adm, Inst Oceanog 2, Key Lab Submarine Geosci, Hangzhou 310012, Zhejiang, Peoples R China 4.China Ocean Mineral Resources Res & Dev Assoc, Beijing 100860, Peoples R China
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 degrees to 51 degrees E)[J]. ACTA OCEANOLOGICA SINICA,2013,32(12):87-95.
APA	Liang Yuyang.,Li Jiabiao.,Li Shoujun.,Ruan Aiguo.,Ni Jianyu.,...&Zhu Lei.(2013).The morphotectonics and its evolutionary dynamics of the central Southwest Indian Ridge (49 degrees to 51 degrees E).ACTA OCEANOLOGICA SINICA,32(12),87-95.
MLA	Liang Yuyang,et al."The morphotectonics and its evolutionary dynamics of the central Southwest Indian Ridge (49 degrees to 51 degrees E)".ACTA OCEANOLOGICA SINICA 32.12(2013):87-95.