naa a22 4500 510754058 CHVBK 20180411083116.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1007/s13131-013-0394-1 doi (NATIONALLICENCE)springer-10.1007/s13131-013-0394-1 The morphotectonics and its evolutionary dynamics of the central Southwest Indian Ridge (49° to 51°E) [Elektronische Daten] [Yuyang Liang, Jiabiao Li, Shoujun Li, Aiguo Ruan, Jianyu Ni, Zhiteng Yu, Lei Zhu] 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. The Chinese Society of Oceanography and Springer-Verlag Berlin Heidelberg, 2013 ultra-slow spreading nationallicence multibeam bathymetry nationallicence morphotectonics nationallicence oceanic core complex nationallicence Southwest Indian Ridge nationallicence Liang Yuyang Institute of Oceanology, Chinese Academy of Sciences, 266071, Qingdao, China aut Li Jiabiao Key Laboratory of Submarine Geosciences, the Second Institute of Oceanography, State Oceanic Administration, 310012, Hangzhou, China aut Li Shoujun Key Laboratory of Submarine Geosciences, the Second Institute of Oceanography, State Oceanic Administration, 310012, Hangzhou, China aut Ruan Aiguo Key Laboratory of Submarine Geosciences, the Second Institute of Oceanography, State Oceanic Administration, 310012, Hangzhou, China aut Ni Jianyu Key Laboratory of Submarine Geosciences, the Second Institute of Oceanography, State Oceanic Administration, 310012, Hangzhou, China aut Yu Zhiteng Key Laboratory of Submarine Geosciences, the Second Institute of Oceanography, State Oceanic Administration, 310012, Hangzhou, China aut Zhu Lei China Ocean Mineral Resources Research and Development Association, 100860, Beijing, China aut Acta Oceanologica Sinica Springer Berlin Heidelberg 32/12(2013-12-01), 87-95 0253-505X 32:12<87 2013 32 13131 https://doi.org/10.1007/s13131-013-0394-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s13131-013-0394-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Liang Yuyang Institute of Oceanology, Chinese Academy of Sciences, 266071, Qingdao, China aut NATIONALLICENCE 700 1- Li Jiabiao Key Laboratory of Submarine Geosciences, the Second Institute of Oceanography, State Oceanic Administration, 310012, Hangzhou, China aut NATIONALLICENCE 700 1- Li Shoujun Key Laboratory of Submarine Geosciences, the Second Institute of Oceanography, State Oceanic Administration, 310012, Hangzhou, China aut NATIONALLICENCE 700 1- Ruan Aiguo Key Laboratory of Submarine Geosciences, the Second Institute of Oceanography, State Oceanic Administration, 310012, Hangzhou, China aut NATIONALLICENCE 700 1- Ni Jianyu Key Laboratory of Submarine Geosciences, the Second Institute of Oceanography, State Oceanic Administration, 310012, Hangzhou, China aut NATIONALLICENCE 700 1- Yu Zhiteng Key Laboratory of Submarine Geosciences, the Second Institute of Oceanography, State Oceanic Administration, 310012, Hangzhou, China aut NATIONALLICENCE 700 1- Zhu Lei China Ocean Mineral Resources Research and Development Association, 100860, Beijing, China aut NATIONALLICENCE 773 0- Acta Oceanologica Sinica Springer Berlin Heidelberg 32/12(2013-12-01), 87-95 0253-505X 32:12<87 2013 32 13131 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer