Dive Number: 3951
December 10, 2003
Port Observer: Greg Druschel
Starboard Observer: Mark Spear
15:10 GMT Arrived on bottom
15:26 Removed wands to check electrodes 1-4.
15:35 Made way to BioVent.
15:43 Arrived at BioVent, positioned sub to work on Alvinella beehive x 4353, y 79197, heading 122.
15:52 Calibrated T 3.0°C from ambient.
15:54 Began electrochemical/Sipper sampling of 8 different Alvinella tubes in beehive selected at BioVent. Took 125 electrochemical scans outside and within each tube, fired 8 Sippers. #1 39–47ēC, #2 65–86ēC, #3 29–92ēC, #4 77–121ēC, #5 52–73ēC, #6 25–66ēC, #7 22–40ēC, #8 22–38ēC.
16:50 After sampling beehive, sampled around chimney which was collected later for ASU microcosm placement. Sipper wand electrochemistry and two Sipper samples taken here. #9 ~1 inch above vent, 81ēC, #10 taken at the base of the chimney, 15ēC.
17:00 Began collecting of alvinellid worm samples with slurp gun at BioVent Beehive where Sipper samples 1–8 were collected. Samples were placed in ARTY chambers 1 and 2 and capped.
18:01 — RNA Later was successfully pumped into each chamber after collection finished.
18:06 Use High-T probe at scar in Alvinella beehive after sampling max T=58ēC at that position.
18:20 Used Sipper wand to get electrochemistry and Sipper sample #11 at the scar in Alvinella beehive. Temperature at wand = 30ēC.
18:30 Moved into position and collected samples for sulfide chimney samples, placed in small biobox.
18:41 Used High-T probe to sample chimney, max. temperature=360ēC.
18:45 Used Sipper wand to get electrochemistry and Sipper sample #12 at scar where chimney removed. Electrochem scans done at temps up to 207ēC (bear in mind thermistor located ~1cm in front of electrode).
18:52 Used macro wand in plume above chimney scar, positioned in three points across range — 25, 58, 62ēC.
19:00 Positioned ASU unit on top of scar.
19:05 Used macro wand above ASU chimney where sulfide plume coming out.
19:13 Finished work at BioVent Alvinella beehive, moved 15 m to collect clams.
19:16 Finished positioning for clam collection x 4359, y 79188.
19:46 Power low after collecting eight clams, moved away from site to drop weights and come up.
|Copyright University of Delaware, November 2003|