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Central Andaman Trough, seamount crater, dredge 6
Name Alias(es):
Vent Sites:
Activity:
Maximum Temperature:
Latitude:
10.0000
Longitude:
94.0000
Location on map:
Ocean:
Region:
National Jurisdiction:
Maximum or Single Reported Depth (mbsl):
1640
Minimum Depth (mbsl):
Tectonic setting:
Full Spreading Rate (mm/a):
39.5
Host Rock:
NotProvided
Deposit Type:
NotProvided
Notes on Vent Field Description:
lat/lon approximate; off-axis seamount; Rao et al. (1996): "The spreading ridge comprises of an inactive northeastern segment and an active southwestern segment. Sampling in the rift valley of the active ridge segment and in a crater of a seamount yielded volcanic rocks which contain vent-like features, broken parts of chimney structures and rocks with disseminate and vein-type metal sulphides. These assemblages, together with the presence of pyrite dusters in the form of rods and irregular lumps in the sediments, are interpreted as evidence for hydrothermal activity in the region, related to backarc spreading and associated volcanism"
Notes Relevant to Biology:
Year and How Discovered (if active, visual confirmation is listed first):
1994 deposits only
Discovery References (text):
(deposits only) P S Rao, K A K Raju, T Ramprasad, B N Nath, B R Rao, C M Rao, R R Nair (1996) Evidence for hydrothermal activity in the Andaman Backarc Basin. Current Science 70: 379-385.
Other References (text):
RDF link: