IODP Expedition 400
NW Greenland Glaciated Margin
Daily science report for 13 October 2023
Locations:
- Underway to Hafnarfjörður, Iceland
- Suourbakki Berth, Hafnarfjörður, Iceland
Science Update: The vessel completed the final 159 nmi of the 1,796 nmi voyage from Site U1606 to Hafnarfjörður, Iceland, at an average speed of 8.3 kt. The pilot was onboard at 1903 h, and the first line was ashore at 1954 h, ending Expedition 400. Immigration boarded at 2030 h and the science party disembarked at 2130 h.
Scientists completed the Preliminary Report and technicians cleaned the laboratories
Daily science report for 12 October 2023
Location: Underway to Hafnarfjörður, Iceland
Science Update: The vessel completed 184 nmi, and a total of 1,639 nmi, of the 1,799 nmi voyage from Site U1606 to Hafnarfjörður, Iceland, at an average speed of 8.0 kt. The estimated arrival in port is 13 October.
Co-Chief Scientists worked on the Preliminary Report and technicians cleaned the laboratories.
Daily science report for 11 October 2023
Location: Underway to Hafnarfjörður, Iceland
Science Update: The vessel completed 272 nmi, and a total of 1,455 nmi, of the 1,799 nmi voyage from Site U1606 to Hafnarfjörður, Iceland, at an average speed of 11.3 kt. The estimated arrival in port is 13 October.
Scientists worked on the reports for Sites U1608 and U1606 and held research meetings.
Daily science report for 10 October 2023
Location: Underway to Hafnarfjörður, Iceland
Science Update: The vessel completed 276 nmi, and a total of 1183 nmi, of the 1799 nmi voyage from Site U1606 to Hafnarfjörður, Iceland, at an average speed of 12.0 kt. The estimated arrival in port is 13 October.
Scientists worked on the reports for Sites U1608 and U1606 and held research meetings.
Daily science report for 9 October 2023
Location: Underway to Hafnarfjörður, Iceland
Science Update: The vessel completed 284 nmi, and a total of 907 nmi, of the 1,799 nmi voyage from Site U1606 to Hafnarfjörður, Iceland, at an average speed of 11.8 kt. The estimated arrival in port is 13 October.
Scientists worked on the reports for Sites U1608 and U1606.
Daily science report for 8 October 2023
Location: Underway to Hafnarfjörður, Iceland
Science Update: The vessel completed 240 nmi, and a total of 623 nmi, of the 1,799 nmi voyage from Site U1606 to Hafnarfjörður, Iceland, at an average speed of 10.4 kt. The estimated arrival in port is 13 October. Vessel clocks were set forward one hour to UTC – 2 h.
Scientists worked on the reports and gave site summary presentations for Sites U1608 and U1606.
Daily science report for 7 October 2023
Location: Underway to Hafnarfjörður, Iceland
Science Update: The vessel completed 195 nmi, and a total of 383 nmi, of the 1,799 nmi voyage from Site U1606 to Hafnarfjörður, Iceland, at an average speed of 8.1 kt. The estimated arrival in port is 13 October.
Scientists worked on the reports for Sites U1608 and U1606.
Daily science report for 6 October 2023
Location: Underway to Hafnarfjörður, Iceland
Science Update: The vessel completed 75 nmi, and a total of 188 nmi, of the 1,799 nmi voyage from Site U1606 to Hafnarfjörður, Iceland, at an average speed of 3.1 kt. The estimated arrival in port is 13 October.
Scientists worked on the reports for Sites U1608 and U1606.
Daily science report for 5 October 2023
Locations:
- Hole U1606D (proposed Site MB-17A): 74°13.6459′N, 61°2.7548′W; water depth 648.3 m
- Underway to Hafnarfjörður, Iceland
Science Update: Cores U1606D-8R to 14R advanced from 69.1 to 132.1 mbsf and recovered 6.96 m (11%). We then tripped the pipe out of Hole U1606D, clearing the rig floor at 0815 h. The drill floor was secured for transit and the thrusters were raised and secured for transit at 1206 h, ending Hole U1606D and Site U1606. The vessel then began the 1799 nmi transit to Hafnarfjörður, Iceland, completing 113 nmi at the end of the day.
Cores U1606D-9R to 14R were split and described. Core 9R consists of washed gravel. Cores 10R to 14R consist primarily of dark gray and grayish brown interlaminated sand and mud, muddy sand, and sandy mud. Dispersed clasts and sparse bioturbation occur variably throughout the cores. Cores are barren or contain sparse fossils.
Daily science report for 4 October 2023
Locations:
- Hole U1606C (proposed Site MB-17A): 74°14.1955′N, 61°1.8156′W; water depth 654.1 m
- Hole U1606D (preliminary): 74°13.6459′N, 61°2.7548′W; water depth 648.3 m
Science Update: Cores U1606C-16R to 18R advanced from 158.2 to 186.7 mbsf and recovered 24.25 m (85%). We then tripped the pipe out of the hole, clearing the seafloor at 0355 h and ending Hole U1606C. The vessel was offset south-southwest of Hole U1606A and Hole U1606D was spudded at 0625 h. The hole was drilled ahead to 13.6 mbsf before removing the center bit and dropping an RCB core barrel. Cores U1606D-2R to 7R advanced from 13.6 to 69.1 mbsf and recovered 0.87 m (2%).
Cores U1606C-10R to 18R were split and described. The cores consist primarily of grayish brown and dark greenish gray interbedded sand and mud, muddy sand, and sandy mud. Dispersed clasts and bioturbation occur variably throughout the cores. Cores contain sparse fossils. Cores U1606D-2R and 4R were split and described (no recovery in Core 3R) and consist of washed gravel.
Daily science report for 3 October 2023
Locations:
- Hole U1606B (proposed Site MB-17A): 74°14.2845′N, 61°1.6553′W; water depth 656.4 m
- Hole U1606C (preliminary): 74°14.1955′N, 61°1.8156′W; water depth 654.1 m
Science Update: We tripped the pipe out of the hole, clearing the seafloor at 0110 h and ending Hole U1606B. The vessel was offset south-southwest of Hole U1606B and Hole U1606C was spudded at 0245 h. The hole was drilled ahead to 25 mbsf before removing the center bit and dropping an RCB core barrel. Cores U1606C-2R to 15R advanced from 25.0 to 158.2 mbsf and recovered 21.06 m (16%).
Cores U1606B-28R to 39R were split and described. Cores 28R to 31R primarily consist of dark gray and dark grayish brown interbedded sand and mud with parallel lamination. Cores 32R to 39R primarily consist of dark greenish gray muddy sand, sandy mud, and mud. Dispersed clasts and bioturbation occur variably throughout the cores. Cores contain sparse fossils. Cores U1606C-3R to 9R were split and described (no recovery in Cores 2R, 4R, and 6R) and consist primarily of dark greenish gray and dark gray muddy sand, sandy mud, and interbedded sand and mud with dispersed clasts throughout. Cores contain sparse fossils.
Daily science report for 2 October 2023
Location: Hole U1606B (proposed Site MB-17A): 74°14.2845′N, 61°1.6553′W; water depth 656.4 m
Science Update: Cores U1606B-19R to 39R advanced from 157.5 to 350.0 mbsf and recovered 146.65 m (73%).
Cores U1606B-12R to 27R were split and described. The cores primarily consist of medium greenish gray and dark grayish brown muddy sand, sandy mud, and mud with one section that is diatom-bearing. Calcareous mud is also present and dispersed clasts and bioturbation occur variably throughout the cores. Cores contain sparse fossils.
Daily science report for 1 October 2023
Location: Hole U1606B (proposed Site MB-17A): 74°14.2845′N, 61°1.6553′W; water depth 656.4 m
Science Update: Cores U1606B-2R to 18R advanced from 4.6 to 157.5 mbsf and recovered 15.15 m (10%).
Cores U1606B-1R to 11R were split and described. Core 1R is composed of medium brown and medium gray mud and muddy sand and Section 1 is soupy. Cores 2R to 9R consist primarily of washed gravel, with some small intervals of diamicton. Cores 10R and 11R are composed primarily of gray sand, with intervals of common and dispersed clasts. Cores contain sparse fossils.