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EPR, 9 50'N
Name Alias(es):
Venture Hydrothermal Field
9 N
9-10 N
Nine North
MGDS_FeatureID lowest in hierarchy:
Vent Sites:
Alvinellid_Pillar
Bio9
BioVent
Choo_Choo
East Wall
Io
M
Mussel Bed
P
Q
Riftia Field
Tevnia Hole
Tica
Tubeworm_Pillar
Ty
Activity:
Maximum Temperature:
386
Latitude:
9.8300
Longitude:
-104.2900
Location on map:
Ocean:
Region:
National Jurisdiction:
Maximum or Single Reported Depth (mbsl):
2520
Minimum Depth (mbsl):
2500
Tectonic setting:
Full Spreading Rate (mm/a):
102.6
Volcano Number (if applicable):
Host Rock:
MORB
Deposit Type:
PMS
Notes on Vent Field Description:
U.S. Ridge 2000 ISS Bulls Eye at EPR 8-11 N; eruption in 1991 and in late 2005/early 2006; 4th order ridge segment B1 in Haymon et al. (1991): "Narrow ASC (40-70m) containing many high T vents.", "Smoking slot", "Prior to the ARGO survey...submersible observations on the axis at 9°53'N of hydrothermally stained lavas and vent fauna"; Fornari et al. (2012): "the segment near 9°50'N has been the focus of multidisciplinary research for over two decades, making it one of the best-studied areas of the global ridge system"
Notes Relevant to Biology:
Riftia, Tevnia, Alvinella, gastropods, limpets, mussels, bythograeid and galatheid crabs; observed dense biota in Haymon et al. (1991)
Year and How Discovered (if active, visual confirmation is listed first):
1989 Argo I towed video
Discovery References (text):
Haymon, R. M., et al., 1991, Hydrothermal vent distribution along the East Pacific Rise crest (9 09'-54'N) and its relationship to magmatic and tectonic processes on fast-spreading mid-ocean ridges, Earth Planet. Sci. Lett., 104, 513-534
(submersible observations prior to Haymon et al. 1991 did not confirm activity) D.J. Fornari, et al., Geochemical and structural studies of the Lamont seamounts: seamounts as indicators of mantle processes, Earth Planet. Sci. Lett. 89, 63-83, 1988.
Other References (text):
Haymon, R. M., D. J. Fornari, K. L. Von Damm et al., Volcanic eruption of the mid-ocean ridge along the East Pacific Rise crest at 9 45-52N: Direct submersible observations of seafloor phenomena associated with an eruption event in April, 1991, Earth Planet. Sci. Lett., 119, 85-101, 1993
Von Damm (2000) Chemistry of hydrothermal vent fluids from 9 -10 N, East Pacific Rise: "Time zero," the immediate posteruptive period. JOURNAL OF GEOPHYSICAL RESEARCH 105(B5): 11203-11222.
Fornari, D.J., et al. 2012. The East Pacific Rise between 9°N and 10°N: Twenty-five years of integrated, multidisciplinary oceanic spreading center studies. Oceanography 25(1):18–43, http://dx.doi.org/10.5670/oceanog.2012.02.
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