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Duanqiao
Name Alias(es):
SWIR, unnamed, Segment 27
SWIR 50 28'E
Activity:
Max Temperature Category:
Latitude:
-37.6579
Longitude:
50.4671
Location on map:
Ocean:
Region:
National Jurisdiction:
Maximum or Single Reported Depth (mbsl):
1780
Minimum Depth (mbsl):
1720
Tectonic setting:
Full Spreading Rate (mm/a):
11.9
Host Rock:
basalt-hosted
Deposit Type:
NotProvided
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, J.et 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, https://doi.org/10.1007/s11001-016-9279-y
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, http://dx.doi.org/10.11646/zootaxa.4420.1.8
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, https://doi.org/10.1016/j.dsr.2018.05.001.
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