Site 4A West plume target
Notes on Vent Field Description:
on the eastern portion of the Galápagos Rift; 2011 cruise blog, accessed 24 April 2015, http://oceanexplorer.noaa.gov/okeanos/explorations/ex1103/logs/july24/july24.html: "Given the extent of living and dead clams around the periphery, this may be one of the largest vent fields found yet on the Galapagos Rift (spanning 130m by 40m)."; Baker et al. (2011): "entire GALREX survey detected ~20 discrete ORP anomalies... Because ORP anomalies are very short lived, and thus do not advect far from their seafloor source, at least ~20 distinct vent "fields" must be active"; WHOI YouTube video, accessed 24 April 2015, https://www.youtube.com/watch?v=jdV9GfzQvrY&index=2&list=PL1CGd4Scv4GJsaaFRzItk-btFI757bH8f
Notes Relevant to Biology:
2011 cruise blog, accessed 24 April 2015, http://oceanexplorer.noaa.gov/okeanos/explorations/ex1103/logs/july24/july24.html: microbial mats, alvinocarid shrimp, anemones, bathymodiolin mussels, brachyuran crabs, Calyptogena clams, dandelion siphonophores, limpets, Riftia tubeworms; additional biological observations in Shank et al. (2011)
Year and How Discovered (if active, visual confirmation is listed first):
Discovery References (text):
Shank, T., et al. (2011) Discovery of Nascent Vents and Recent Colonization Associated with(Re)activated Hydrothermal Vent Fields by the GALREX 2011 Expedition on the Galápagos Rift. American Geophysical Union, Fall Meeting 2011, abstract #OS22A-07; Shank, T., et al. (2012) Exploration of the deepwater Galapagos region. Oceanography, 25(1), Suppl. 50-51.
Baker, E., et al. (2011) GALREX 2011: Extensive hydrothermal venting discovered along the eastern Galapagos Rift. American Geophysical Union, Fall Meeting 2011, abstract #OS22A-08.