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Longqi
Name Alias(es):
Dragon Horn Area
DHA
Dragon
SWIR Area A
49.6 E hydrothermal field, SWIR
49.65 E, SWIR
Vent Sites:
DFF1: Jabberwocky;
DFF5: Ryugu-jo;
DFF11: Tiamat;
DFF19: Knucker's Gaff;
DFF20: Fucanglong's Furnace
DFF2: Jiaolong's Palace
Activity:
Maximum Temperature:
379
Max Temperature Category:
Latitude:
-37.7838
Longitude:
49.6494
Location on map:
Ocean:
Region:
National Jurisdiction:
Maximum or Single Reported Depth (mbsl):
2785
Minimum Depth (mbsl):
2755
Tectonic setting:
Full Spreading Rate (mm/a):
12.1
Host Rock:
NotProvided
Deposit Type:
NotProvided
Notes on Vent Field Description:
first black smokers discovered on ultra-slow ridge; position from Chen et al. (2015): "Longqi vent field (37°47.027′S, 49°38.963′E), Southwest Indian Ridge"; Tao et al. (2009): "Three new hydrothermal vents were detected 400 m and 550 m north to the 49.65 E active field that was discovered in 2007"; Tao et al. (2014): "Dragon Flag deposit (DFD)", "Dragon Horn Area (DHA)... located on the southern of segment 27 SWIR... belongs to the oceanic core complex (OCC)", "hydrothermal anomaly area, centered at 49.66 E，37.80 S with a range of several kms, is detected in the DHA. It is probably comprised of several hydrothermal fields and controlled by a NW fault", "Dragon Well West field (49.6 E, 37.8 S), Dragon Well East field (49.8 E, 37.8 S)"
Notes Relevant to Biology:
Chen et al. (2015): "RRS James Cook JC67 expedition in 2011 sampled the biota of the Longqi vent field... for the first time, revealing a previously unknown population of the ‘scaly-foot gastropod’"; List of macrofauna taxa in Zhou et al. (2018);
Year and How Discovered (if active, visual confirmation is listed first):
2007 towed video sled followed by AUV ABE; 2005 plume only
Discovery References (text):
(plume only) Lin and Zhang (2006) The first collaborative China-international cruises to investigate mid-ocean ridge hydrothermal vents. InterRidge News 16: 33-34;
Tao et al. (2007) DISCOVERY OF THE FIRST ACTIVE HYDROTHERMAL VENT FIELD AT THE ULTRASLOW SPREADING SOUTHWEST INDIAN RIDGE: THE CHINESE DY115-19 CRUISE. InterRidge News 16: 25-26;
Tao, C. et al. (2007) First Discovery and Investigation of a High-Temperature Hydrothermal Vent Field on the Ultra-Slow Spreading Southwest Indian Ridge. Abstract #T52B-07, American Geophysical Union, Fall Meeting 2007;
Other References (text):
Han, et al. (2009) Mineralogy, petrology and geochemistry of basalts from 49.6°E hydrothermal field, Southwest Indian Ridge. AGU Fall Meeting ID# OS13A-1192;
Tao 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;
Tao, C. et al. (2014) Hydrothermal Activity on ultraslow Spreading Ridge: new hydrothermal fields found on the Southwest Indian ridge. AGU Fall Meeting abstract #OS53C-1061;
Chen, C. et al. (2015) The ‘scaly-foot gastropod’: a new genus and species of hydrothermal vent-endemic gastropod (Neomphalina: Peltospiridae) from the Indian Ocean. J. Mollus. Stud., doi: 10.1093/mollus/eyv013;
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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