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Name Alias(es): 
SWIR, unnamed, Segment 27
SWIR 50 28'E
Max Temperature Category: 
Location on map: 
National Jurisdiction: 
Maximum or Single Reported Depth (mbsl): 
Minimum Depth (mbsl): 
Tectonic setting: 
Full Spreading Rate (mm/a): 
Volcano Number (if applicable): 
Host Rock: 
Deposit Type: 
Notes on Vent Field Description: 
two areas of sulfide deposits approx. 200 x 100 m and 300 x 200 m based on video surveys; Yang et al. (2017): "Hydrothermal activity of Duanqiao probably started about 84.3 (+-0.5) kyrs ago and ceased about 0.737 (+-0.023) kyrs ago.", "Four major episodes of hydrothermal activity... 68.9-84.3, 43.9-48.4, 25.3-34.8, and 0.7-17.3 kyrs."
Notes Relevant to Biology: 
see Zhou, Y. et al. (2018) and Wang, al. (2018)
Year and How Discovered (if active, visual confirmation is listed first): 
2008 video and TV-grab DY115-20 Leg 5; 2015 TV-grab DY125-34
Discovery References (text): 
Tao, C. et al. (2009) New hydrothermal fields found along the SWIR during the Legs 5-7 of the Chinese DY115-20 Expedition. AGU Fall Meeting abstract #OS21A-1150;
Other References (text): 
Yang, W., et al. (2017) 230Th/238U dating of hydrothermal sulfides from Duanqiao hydrothermal field, Southwest Indian Ridge. Marine Geophysical Research 38, 71-83,
Wang, J., Huang, D., Shi, X., Lin, R. and Niu, W., (2018) First record and a new species of Sericosura Fry & Hedgpeth, 1969 (Arthropoda: Pycnogonida: Ammotheidae) from a hydrothermal vent of Southwestern Indian Ridge. Zootaxa, 4420(1) 131-138,
Zhou, Y. et al. (2018) Characterization of vent fauna at three hydrothermal vent fields on the Southwest Indian Ridge: Implications for biogeography and interannual dynamics on ultraslow-spreading ridges. Deep Sea Research Part I: Oceanographic Research Papers 137: 1-12,