Notes on Vent Field Description:
two main zones of hydrothermal activity within an area 65 x 45 m on eastern wall of axial graben; Zone 1 is diffuse vent with associated fauna, no sulfides; Zone 2 has massive sulfide and black smokers; axial high on ARGO-RISE Fig. 1: "A hydrothermal stack at 10 55.75'N, active during the Protea Expedition in the summer of 1984, was inactive during the Ice Expedition in December, 1985. Submersible surveys of the 10 55.75'N hydrothermal area by the D.S.R.V. ALVIN (May 1984) indicated that the main sulfide zone was Iocated on a fissure system, but that the hydrothermal activity was patchy"
Notes Relevant to Biology:
brachyuran and galatheid crabs, serpulid worms, tubeworms, mussels, amphipods
Year and How Discovered (if active, visual confirmation is listed first):
1984 towed camera and submersible Alvin
Discovery References (text):
McConachy et al., Geology, 14, 295-298, 1986, Geologic form and setting of a hydrothermal vent field at lat 10°56′N, East Pacific Rise: A detailed study using Angus and Alvin.
Other References (text):
ARGO-RISE Group, Can. Mineral., 26, 467-486, 1988, Geological mapping of the East Pacific Rise axis (10 19’-11 53’N) using the ARGO and ANGUS imaging systems.