Dive R499 | |||||||
Dive Plan: Fluid sample northern new lava area at Magnesia, N41, Oxide (near N41), Nascent, Cloud, Mkr-33. Suction sample at Magnesia, OldWorms and Mkr-33. Imagenex. Deploy Osmo at Magnesia | |||||||
Note: Nav fixes not edited in the logs. All fixes were logged, regardless of accuracy. Use the dive plots to determine actual positions. | |||||||
UTC Hour | Min | Depth (m) | Sub Hdng (deg) | UTM X | UTM Y | Comments | Frmgrbs, Photos, Samples |
3 | 59 | 0 | 0 | 420874 | 5096849 | ROPOS in the water at 15:09 UTC | |
16 | 27 | 1526 | 87 | 421434 | 5084283 | On the bottom. Lava pillar. Resetting still camera count to zero. | |
16 | 30 | 1523 | 87 | 423372 | 5088972 | Just hanging out for a few minutes while we wait for nav. | |
16 | 30 | 1523 | 87 | 423372 | 5088972 | Lots of floc in the water - did ROPOS stir some up or is it snow output from Magnesia vent? Still waiting for nav, disregard fixes. | |
16 | 30 | 1523 | 87 | 423372 | 5088972 | White spire in the distance - looks like it is hydrothermal in origin. Multiple pillars. We are not at Magnesia yet, we're waiting for a good fix. Looks like there might be some white spots, some venting. | Photo 1 - 4 |
16 | 40 | 1527 | 85 | 423306 | 5088132 | More pillars, covered on top with sediment. Is it hydrothermal in origin? | Photo 5 |
16 | 43 | 1525 | 91 | 423674 | 5088571 | good ROPOS fix. | |
16 | 44 | 1526 | 179 | 423819 | 5088308 | More pillars. Not getting video input to the frame grabber. Lots of floc in the water and fall out on the ground. | Photo 7 - 8 |
16 | 46 | 1528 | 187 | 423897 | 5088183 | At Magnesia vent. Tons of floc coming out of the pit. | |
16 | 46 | 1530 | 162 | 423678 | 5088534 | Frame grab video back on. Still no good nav. | |
16 | 48 | 1530 | 164 | 423676 | 5088138 | Video highlights on. Moving into position to fluid sample. | |
16 | 49 | 1528 | 120 | 423670 | 5088545 | good ROPOS fix: 3669, 8545. Accidental photo. | Photo 8 |
16 | 59 | 1531 | 353 | 423669 | 5088550 | Probing for temperature at Magnesia. Note: Imagenex is not getting data. Maximum temp. at 7 degrees C. | |
17 | 7 | 1531 | 357 | 423674 | 5088535 | Locked the arm for fluid sampling - up to 7.3 degrees C. Starting to suction at 17:08 into filter #3 for xrf of HFS. | HFS-3_dfl _R499-1 |
17 | 13 | 1531 | 359 | 423666 | 5088550 | Finished pumping R49-1 at 17:13, 50 ml was pumped. Starting to pump into piston #4. Stopping at 17:19, 60 ml pumped. | HFS-4_dfl
_R499-2 |
17 | 19 | 1531 | 359 | 423670 | 5088548 | The max. temp on the last sample (R49-2) was 7.4 degrees C. Starting to pump gas piston #5. Stopped at 17:22. | HFS-5_dfl
_R499-3 |
17 | 23 | 1531 | 357 | 423670 | 5088537 | Starting to pump bag #18 of HFS at 17:26. This is the last fluid sample at Magnesia. Stopped pumping at 17:31, pumped 613 ml. Few seconds of highlights at 17:32. | HFS-18_dfl
_R499-4 |
17 | 40 | 1531 | 357 | 423678 | 5088536 | Spent the last 5 minutes panning around looking for animals to suction. We could only find a couple scale worms. We are going to deploy the Osmo first and then go for a suction sample. | |
17 | 45 | 1531 | 5 | 423669 | 5088545 | Deploying the Osmo sampler. | |
17 | 52 | 1531 | 18 | 423668 | 5088544 | Shut off the sub aux. power to try and get imagenex working. It's working now. | |
17 | 54 | 1530 | 17 | 423667 | 5088547 | Still trying to deploy the Osmo. Grabbing the t-handle and placing the intake down into the pit opening. | |
18 | 1 | 1531 | 22 | 423668 | 5088545 | Dropping the Osmo intake into the pit. | |
18 | 12 | 1531 | 335 | 423665 | 5088552 | The intake tip is in place for the Osmo, now need to position the main body. | |
18 | 14 | 1531 | 335 | 423675 | 5088528 | Still at Magnesia. Tripping the Niskin bottle at 18:17. | Niskin_dfl
_R499-5 |
18 | 22 | 1530 | 5 | 423668 | 5088546 | Osmo sampler Red at Magnesia | R499-1 |
18 | 22 | 1530 | 26 | 423669 | 5088545 | Photo of Osmo position. | Photo 9 |
18 | 25 | 1530 | 216 | 423668 | 5088554 | Red Osmo sampler at Magnesia | R499-2 |
18 | 24 | 1528 | 179 | 423669 | 5088548 | VHS tapes changed. Still at Magnesia. | Photo 10 |
18 | 30 | 1531 | 24 | 423194 | 5088810 | Area shot | R499-3 |
18 | 30 | 1531 | 14 | 423194 | 5088810 | Venting fluid at Magnesia | R499-4 |
18 | 33 | 1531 | 350 | 423669 | 5088549 | R499-5 | |
18 | 33 | 1531 | 348 | 423669 | 5088549 | Red Osmo sampler at Magnesia | R499-6 |
18 | 34 | 1531 | 346 | 423669 | 5088554 | Red osmo sampler at Magnesia | R499-7 |
18 | 36 | 1531 | 354 | 423675 | 5088523 | Repositioning for suction sampling of scale worms. | |
18 | 39 | 1532 | 43 | 423669 | 5088544 | Highlights have been off for awhile. | |
18 | 41 | 1527 | 325 | 423658 | 5088538 | Susan-san says a good fix. | |
18 | 49 | 1529 | 210 | 423657 | 5088548 | Still trying to find some polynoids to suction for Jean. | |
18 | 55 | 1497 | 286 | 423661 | 5088551 | Suction sampling abandoned as visibility was poor. | |
18 | 58 | 1498 | 42 | 423661 | 5088551 | Back to cage. Power problems with sub but not lethal. | |
19 | 14 | 1501 | 152 | 423680 | 5088495 | On our way to Old Worms. ROPOS at cage as ship moved. | |
19 | 17 | 1503 | 124 | 423694 | 5088492 | We were in a dense plume. Took highlight video. Now getting out of plume - going from snow to fog"." | |
19 | 27 | 1504 | 360 | 423788 | 5088439 | smoke plume | R499-8 |
19 | 27 | 1504 | 46 | 423777 | 5088438 | Still in fog" = buoyant plume of fine particulates near Old Worms." | |
19 | 29 | 1521 | 212 | 423791 | 5088447 | On the bottom in worms so must be at Old Worms site. | |
19 | 30 | 1524 | 188 | 423807 | 5088481 | water and worms | R499-9 |
19 | 30 | 1525 | 187 | 423791 | 5088448 | R499-10 | |
19 | 30 | 1524 | 186 | 423791 | 5088448 | Photos of sponges on a pillar. | Photos 1 & 12 |
19 | 31 | 1523 | 148 | 423796 | 5088439 | Photo of drainout and tube worms. | Photo 13 |
19 | 33 | 1524 | 174 | 423794 | 5088432 | Photo of lobate lava, worms and crab. | |
19 | 33 | 1523 | 151 | 423796 | 5088428 | Last was photo 14 - forgot to enter to right. | Photo 14 |
19 | 36 | 1525 | 188 | 423798 | 5088428 | Worms are (barely) alive. Not much venting seen yet. | |
19 | 38 | 1524 | 261 | 423799 | 5088422 | Worms, crab (maybe). | Photo 15 |
19 | 39 | 1524 | 266 | 423792 | 5088422 | More worms. | Photo 16 |
19 | 39 | 1525 | 234 | 423792 | 5088424 | Appear to at place where we sampled on an earlier dive. | |
19 | 40 | 1524 | 313 | 423780 | 5088421 | Diffuse vent, sponges. | Photo 17 |
19 | 45 | 1526 | 88 | 423782 | 5088427 | Parked in front of a tube worm bush looking for fluid to sample. | |
19 | 55 | 1526 | 110 | 423780 | 5088430 | Stuck HFS into tube worm bush. Found only 4.2C and no obvious flow so not a suitable sampling site. | |
20 | 2 | 1526 | 115 | 423784 | 5088418 | suspected venting | R499-11 |
20 | 7 | 1525 | 175 | 423785 | 5088418 | yet another spot to check out | R499-12 |
20 | 4 | 1526 | 116 | 423783 | 5088421 | Lazy flow in tube worm bush. Not good enough to sample. | |
20 | 8 | 1525 | 168 | 423786 | 5088417 | Moved west and found a better site with lush growth and good fluid flow. | |
20 | 19 | 1526 | 148 | 423787 | 5088412 | Gas piston #24 started at 20:19:40. good fix. | HFS-24_dfl
_R499-6 |
20 | 21 | 1526 | 147 | 423786 | 5088412 | Gas sample stopped after 1 minute at 20:21. Probably ~150 ml. | |
20 | 23 | 1526 | 150 | 423786 | 5088412 | Max T on previous sample was 7.8C. | |
0 | 0 | 0 | 0 | 0 | Not getting an increased temperature on the outlet thermocouple when pumping. Trying to determine why - massive leak? Also, big cloud of hydraulic fluid from ROPOS. Going back to cage. Dive terminated. | ||
20 | 37 | 1481 | 174 | 423781 | 5088406 | ROPOS is in its cage and winding to surface. | |
21 | 40 | 2 | 41 | 423705 | 5088548 | 21:30. ROPOS on deck. | |
21 | 45 | 2 | 41 | 423705 | 5088548 | Dive Summary: Vent fluid samples, nisken, suction samples of biota and deployment of osmosampler at Magnesia Vent. Video of plume. Vent fluid sample at OldWorms. Leak in HFS folowed by hydraulic leak in ROPOS terminated the dive. |