Timeline:
16 : 36 (GMT) Arrive at seafloor; touched down at site with large rock formations, sulfide boulders; sited some glass sponges; no volcanic activity at site; asking Atlantis for survey to direct us to site;
X -4504 Y8017 2623m
16:57 Taking some nice pictures of sponges with 3-chip camera;
17:00 Cat food in Horst’s crab trap attracts some amphipods (purple color with large luminescent organs around their eyes); great pictures of amphipods taken with 3-chip. camera;
17:12 Getting coordinates back from the Atlantis; we landed 160m from the mount and start moving to main mount;
17:17 Arrive at main mount; observe some sea anemonies, “cold” bacterial mats, fair number of crabs; start to look for Alvinella patches, Riftia or mussels / clams
X -4272 Y8277 2598m Heading +315
17:22 Deployment of the crab trap in a patch of rusty Riftia;
X -4247 Y8257 2579m Heading +331
depart to look further for Alvinella site
17:35 Arrive at suitable Alvinella patch on mount (crab trap visible through starboard window; pictures taken)
X -4250 Y8254 2576m Heading +336
Sipper work begins:
Sipper # |
temp range
(degrees Celsius) |
fire time |
temp when fired
(degrees Celsius) |
1 |
45 - 70 |
17 : 50 |
67 |
2 |
37 - 44 |
17 : 55 |
42 |
3 |
34 - 49 |
17 : 59 |
49 |
4 |
5 – 11 |
18 : 03 |
7 |
5 |
61 - 81 |
18 : 07 |
79 |
6 |
14 - 36 |
18 : 13 |
36 |
7 |
38 - 41 |
18 : 19 |
39 |
8 |
33 - 49 |
18 : 21 |
46 |
18:30 Starting ARTY Alvinella collection from the same site and targeted the hot area measured with the sippers.
ARTY chamber 1 (all the way to the left): collected ~ 7 worms from the patch where sipper temps ranged from 35 – 80degrees Celsius.
ARTY chamber 2 (middle one): collected ~5 worms from same area – sipper temps where 30 – 45 degrees Celsius.
19:06 Moving on to look for additional Alvinella patch;
19:10 Arrive to collect more Alvinella at
X -4223 Y8231 2559m
Sipper # |
temp range
(degrees Celsius) |
fire time |
temp when fired
(degrees Celsius) |
9 |
17 – 21 |
19 : 15 |
21 |
10 |
29 - 33 |
19 : 19 |
33 |
19:24 Collection of ~ 6 worms into ARTY 3 (chamber to far right); worms are from the area where sipper temp ranged 17 – 33 degrees Celsius.
19:46 After flooding chamber 3 the temp of the diffuse flow is taken at the crevice right next to the Alvinella patch.
Sipper # |
temp range
(degrees Celsius) |
fire time |
temp when fired
(degrees Celsius) |
11 |
74 - 210 |
19 :46 |
210 |
19:52 – 19:57 Collection of Alvinella clumps at same site into Biobox. After collection we start off on the lookout for Riftia or hot sulfides with bacterial mats. To this point no clams or mussels are sited.
20:10 Arrive at a Riftia patch; tubes look very rusty;
20:17 – 20:22 ~ 19 Riftias are collected and put into the grey biobox.
X -4239 Y8212 2562m
Starting to head back to pick up the crab trap.
20:27 – 20:30 Crab trap is being collected and put into white biobox.
X -4247 Y8257 2579m
After collection we start moving on the lookout for hot sulfide and bacterial mat.
20:44 Spot suitable sulfide for collection with small smokers associated.
X -4210 Y8281 2581m Heading +55
20:46 – 20:55 Sulfide collection. To avoid contamination of the sulfide samples the crab trap is moved to the grey biobox and the sulfide is transferred into the white biobox.
20:56 Taking temp at collection site with Hi Temp probe: 298 degrees Celsius
20:57 Some more sulfide is added to the top of the basket.
20:59 Weights dropped and heading back to surface
