Timeline:
13:56 (GMT) Sub in water; many little jellyfish
14:01-15:26 Dive check digital voice recorder, stow until later; bioluminescence throughout column
15:26 Sub at bottom; touch down in axial summit caldera (ASC) near East Wall; turn south and head towards mussel bed; lots of dead mussels
X4456 Y78439 Z2498 +100
15:46 Arrive East Wall
X4554 Y78430 +193
15:53-16:00 Collect Riftia pachyptila for Horst: ~10-15 worms; Riftia clump surrounded by dense beds of mussels covering > 10 square meters
X4562 Y78419 +28
16:06 Begin transit south to look for Michael's marker
16:10 Locate marker, collect and place on basket
X4579 Y78432
16:15 Begin transit north through Axial Summit Caldera to Michael's Vent; lots of topography (collapsed basalt, many small canyons, pillars)
16:50 Arrive at Michael's Vent; small clumps of Riftia
X4421 Y78734 Z2507 +24
16:53 Deploy marker; film deployment (no image of marker front)
X4423 Y78740
16:57 Begin search for Prototrap A
17:09-17:12 Find and recover Prototrap A; stop during process to take photo of Michael's marker, capturing inscription on front
X4432 Y78734 +207
17:13 Begin transit north to Q Vent in search of frying pan
17:15 Switch tapes in port/starboard camera recorders
17:23-17:39 Locate and recover frying pan; during initial recovery event, sub nudges Q vent, causing a small chunk of the chimney near the frying pan to crumble and opening up a larger orifice (spewing smoker effluent); frying pan is knocked loose and tumbles to base of chimney; some sample is clearly lost; due to plume of smoke hindering view, pilot repositions sub and recovers remainder of frying pan from chimney base
X4415 Y78817
17:37-17:39 Sub HiT probe used to take temp measurements in region of chimney where pan was located prior to being dislodged; temps: 325 °C (in orifice), 325 °C (possible location of fry pan diffuser), 180 °C and 220 °C (periphery of orifice)
X4416 Y78804
17:40 Begin transit north to M Vent
17:46 Arrive at M Vent; begin set-up for Sipper work at Alvinella mound
X4411 Y78904 +305
17:46-19:16 collect Sipper water samples; 10 Alvinella tubes sampled (i.e., 10 sippers); tube temps range from 23 °C to 119 °C (average temps between 35-55 °C)
Sipper # |
Temp Range (°C) |
Fire Time |
1 |
56-68 |
18:05 |
2 |
24-38 |
18:26 |
3 |
38-56 |
18:30 |
4* |
48-119 |
18:35 |
5 |
43-64 |
18:42:30 |
6 |
23-40 |
18:47:40 |
7 |
37-80 |
18:52:45 |
8 |
26-60 |
18:58:55 |
9** |
26-56 |
19:05:15 |
10 |
40-48 |
19:15:15 |
*Temp rose sharply near end of sampling period
**Sipper took a long time to fire
19:20 Begin Alvinella worm collection using ARTY chambers; sample from same vicinity (~0.5 m2 patch) as targeted for sipper collection
19:20-19:30 Place ~ 5 worms in Chamber 1; difficult to see exact number
19:32-19:53 Place ~ 5 worms in Chamber 2
19:48-19:53 Grab Alvinella clumps (three small ones from same area), and place in biobox
19:55 Begin transit NW to Biovent
20:03 Change CO2 scrubber in sub
20:09 Arrive at Biovent, and begin search for prototraps
20:13 Find and recover Prototrap H from worm patch
X4369 Y79184 +209
20:18 Find and recover Prototrap I from bare basalt
X4376 Y79179 +153
20:43 Find and recover Prototrap B from mussel bed
X4367 Y79199 +317
20:46 Drop weights, and begin ascent to surface
22:20 Arrive at surface
