naa a22 4500 510753965 CHVBK 20180411083115.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1007/s13131-013-0397-y doi (NATIONALLICENCE)springer-10.1007/s13131-013-0397-y Distribution of large-scale detachment faults on mid-ocean ridges in relation to spreading rates [Elektronische Daten] [Zhiteng Yu, Jiabiao Li, Yuyang Liang, Xiqiu Han, Jie Zhang, Lei Zhu] Large-scale detachment faults on mid-ocean ridges (MORs) provide a window into the deeper earth. They have megamullion on their corrugated surfaces, with exposed lower crustal and upper mantle rocks, relatively high residual Bouguer gravity anomaly and P-wave velocity, and are commonly associated with oceanic core complex. According to 30 detachment faults identified on MORs, we found that their distances to the axis mostly range from 5 to 50 km, half-spreading rates range from 6.8 to 17 mm/a, and activity time ranges from recent to 3 Ma. Most of the detachment faults are developed on the slow spreading Mid-Atlantic Ridge (MAR) and ultra-slow spreading Southwest Indian Ridge (SWIR), with the dominant half-spreading rates of 7-13 mm/a, especially 10-13 mm/a. Furthermore, they mostly occur at the inside corner of one segment end and result in an asymmetric seafloor spreading. The detachment faults on MORs are mainly controlled by the tectonism and influenced by the magmatism. Long-lived detachment faults tend to be formed where the ridge magma supply is at a moderate level, although the tectonism is a first-order controlling factor. At the slow spreading ridges, detachment faults tend to occur where local magma supply is relatively low, whilst at the ultra-slow spreading ridges, they normally occur where local magma supply is relatively high. These faults are accompanied by hydrothermal activities, with their relationships being useful in the study of hydrothermal polymetallic sulfides and their origin. The Chinese Society of Oceanography and Springer-Verlag Berlin Heidelberg, 2013 detachment faults nationallicence oceanic core complex nationallicence spreading rates nationallicence distribution nationallicence tectonism nationallicence magma supply nationallicence hydrothermal vents nationallicence Yu Zhiteng Key Laboratory of Submarine Geosciences, State Oceanic Administration, 310012, Hangzhou, China aut Li Jiabiao Key Laboratory of Submarine Geosciences, State Oceanic Administration, 310012, Hangzhou, China aut Liang Yuyang Key Laboratory of Submarine Geosciences, State Oceanic Administration, 310012, Hangzhou, China aut Han Xiqiu Key Laboratory of Submarine Geosciences, State Oceanic Administration, 310012, Hangzhou, China aut Zhang Jie Key Laboratory of Submarine Geosciences, 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), 109-117 0253-505X 32:12<109 2013 32 13131 https://doi.org/10.1007/s13131-013-0397-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s13131-013-0397-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yu Zhiteng Key Laboratory of Submarine Geosciences, State Oceanic Administration, 310012, Hangzhou, China aut NATIONALLICENCE 700 1- Li Jiabiao Key Laboratory of Submarine Geosciences, State Oceanic Administration, 310012, Hangzhou, China aut NATIONALLICENCE 700 1- Liang Yuyang Key Laboratory of Submarine Geosciences, State Oceanic Administration, 310012, Hangzhou, China aut NATIONALLICENCE 700 1- Han Xiqiu Key Laboratory of Submarine Geosciences, State Oceanic Administration, 310012, Hangzhou, China aut NATIONALLICENCE 700 1- Zhang Jie Key Laboratory of Submarine Geosciences, 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), 109-117 0253-505X 32:12<109 2013 32 13131 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer