Dive 2931 June 5, 1995 pilot: Pat Hickey
port: John Delaney
starb: Véronique Robigou
Summary by Véronique Robigou Observations based on notes taken during dive
Exploration dive to the north of High-Rise to a water column anomaly identified during the
previous nights of Tow-Yo work
Launching target 6320, 9018
3 main targets from water column work 6560, 9758
6794, 10277
5946,9573
8:11 In water, permission to dive
rough landing in water lost the large markers
8:30 discussing plan of dive with Pt we decide to first start around 6230, 9017
8:40 Checking navigation and old net versus new net recruxhed by C. Parker
depth 1050m
8:49 D 1427 m
9:05 D 1500 m
9:16 Ranging on Xponders 11.5, 11, 9.5, 7.5
9:18 3chip video and mesotech set-up checked
9:27 On bottom
9:45 The goal is to start in the valley, then travel west toward the wall and find the first
anomaly, then travel west toward the second anomaly and finally if time left, go to the
trird anomaly which is even further north and also the landslide deposit just east of the
volcano summit.
9:45 travelling west to the wall.
Collected basaltic sample from valley floor.
nice fresh glassy rim for sampling glass 5977, 8922, 2167, 3, 292
9:45-11:11
travelling describing the geology and following SONAR map. All detailed
observations are in dive narrative.
11:11 Tubeworm patch on a N-S basaltic pillow ridge
5878, 9562, 2131, 8, 306
Temperature inside tubeworm patch 14, 12, 8C
Temperature at the surface of the worms 5C
11:14 Sampling temperature on another tubeworm patch on this tubeworm covered
ridge. 12.6C in diffuse flow with tubeworms (small) and limpets
2121, 8, 307
11:18 GasT yellow 5878, 9563, 2131, 8, 312
11:21 Major yellow 5877, 9561, 2131, 8, 273
11:25 Deploying marker AC 5n south of tubeworm patch sampled
5879, 9557, 2133, 7, 269
Travelling north (see dive narrative for observations)
11:51 Arriving at new tubeworm patch
5882, 9735, 2127, 4, 180
temperature in tubeworms 24.4C max
11:56 temperature in tubeworms and diffuse flow 29.8C
5882, 9735, 2127, 5, 197
11:59 GasT purple 5882, 9735, 2127, 4, 174
12:06 Major red 5884, 9738, 2127, 4, 185
12:07 Deploying marker AK
5884, 9737, 2127, 5, 185
12:09 sample of tubeworms collected in biobox
12:10 documenting area with 3-chip
Travelling north (dive narrative)
13:16 First area with sulfides and tubeworms. It seems we have reached a field this time
rather than an isolated seep of diffuse flow.
6685, 9843, 2156, 9, 312
In the field hunting for something good
13:27 6685, 9843, 2144, 14, 055
sulfide structure with rather weak looking flanges and one smoker
13:30 Black smoker Temperature measurements 323.9C max.on smoker
6685, 9843, 2144, 14, 191
13:34-13:35 major purple
13:37 deploying marker AF
13:42 GasT blue
13:45 major blue #10
13:53 gasT red did not hear trigger!
13:55 Work on flange
temperature in pool 322.1C max
14:00 temperature on flange 28.1C
edge of the flange 70C
top of flange 0.5-0.6C
14:04 Inside "red" community of palm worms 7C
14:06 flange pool 306.4C
2146, 13, 153
flange is 80 cm wide and sticks away from sulfide wall 80 cm
14:10 Documenting flange wirh video
14:13 Documenting area from which flange piece was removed
14:15 On the way up triggering 2 Niskins
14:15:30 Red Niskin 2143, 15, 172
14:16:40 Orange Niskin 2136, 22, 189