37 48'S, southern EPR
38 S, northern Pacific-Antarctic Ridge
Notes on Vent Field Description:
MOR-hotspot intersection for Foundation Seamount chain; Stoffers et al. (2002): "We examined a 630 km-long segment of the northern PAR bounded by large left-stepping overlapping spreading centres (OSCs) near 36.5°S and 41.5°S... 65 stations were devoted to recovering seafloor samples in conjunction with video observations of hydrothermal activity and vent fauna.", "White hydrothermal fluid was observed near a sulphide outcrop 10 m across at one fissure, and the fissures are surrounded by a vesicomyid clam bed 50 m in diameter and abundant vent fauna."; 2005 cruise: http://www.mbari.org/expeditions/EasterMicroplate/index.htm
Notes Relevant to Biology:
alvinellids, barnacles, crabs, mussels, no Riftia or Calyptogena in 2005, yeti crab discovered in 2005; Stoffers et al. (2002): "The abundance of swimming crinoids at the PAR is possibly unique, and they were a useful indicator of nearby hydrothermal venting."
Year and How Discovered (if active, visual confirmation is listed first):
2001 towed video and TV-grab
Discovery References (text):
Stoffers et al., InterRidge News, 11(1), 30-32, 2002, Widespread Silicic Volcanism and Hydrothermal Activity on the Northern Pacific-Antarctic Ridge.
Other References (text):
Stecher, J. et al. (2002) Faunal assemblages on the Pacific-Antarctic Ridge near the Foundation Seamount Chain (37 30'S, 110 30'W). Cahiers Biol. Mar. 43: 271-274.