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PANGAEA.
Data Publisher for Earth & Environmental Science
Abstract:
The South Atlantic Transect (SAT) is a multidisciplinary scientific ocean drilling experiment designed to investigate the evolution of the ocean crust and overlying sediments across the western flank of the Mid-Atlantic Ridge. This project comprises four International Ocean Discovery Program expeditions: fully staffed Expeditions 390 and 393 (April–August 2022) built on engineering preparations during Expeditions 390C and 395E (October–December 2020 and April–June 2021, respectively) that took place without science parties during the height of the Coronavirus Disease 2019 (COVID-19) pandemic. Through operations along a crustal flow line at ~31°S, the SAT recovered complete sedimentary sections and the upper ~40–340 m of the underlying ocean crust formed at a slow- to intermediate-spreading rate at the Mid-Atlantic Ridge over the past ~61 My. The sediments along this transect were originally spot cored more than 50 years ago during Deep Sea Drilling Project Leg 3 (December 1968–January 1969) to help verify the theories of seafloor spreading and plate tectonics. Site U1560 (30°24.2057′S, 16°55.3702′W; proposed Site SATL-25A) is in the central South Atlantic Ocean at a water depth of ~3723 meters below sea level (mbsl), ~315 km west of the Mid-Atlantic Ridge in the low-productivity South Atlantic Gyre. The crust formed at an intermediate half spreading rate of ~25.5 mm/a, which is the highest spreading rate in the study region (see: Expedition 390/393 summary [Coggon et al., 2024]). With an estimated age of 15.2 Ma, Site U1560 is the second youngest location of the South Atlantic Transect (SAT) campaign (International Ocean Discovery Program [IODP] Expeditions 390C, 395E, 390, and 393).
References:
Coggon, Rosalind M; Teagle, Damon A H; Sylvan, Jason B; Reece, Julia; Estes, Emily R; Williams, Trevor J; Christeson, Gail L; IODP Expedition 390/393 Scientists (2024): South Atlantic Transect. Proceedings of the International Ocean Discovery Program, International Ocean Discovery Program, 390/393, https://doi.org/10.14379/iodp.proc.390393.2024
Coverage:
Latitude: -30.403428 * Longitude: -16.922837
Date/Time Start: 2021-04-24T15:15:00 * Date/Time End: 2021-04-28T00:00:00
Minimum Elevation: -3723.7 m * Maximum Elevation: -3723.7 m
Event(s):
395E-U1560B * Latitude: -30.403428 * Longitude: -16.922837 * Date/Time Start: 2021-04-24T15:15:00 * Date/Time End: 2021-04-28T00:00:00 * Elevation: -3723.7 m * Number of cores: 0 * Penetration: 124 m * Recovery: 0 % * Location: South Atlantic Ocean * Campaign: Exp395E * Basis: Joides Resolution * Method/Device: Core drilling (CDRILL) * Comment: Time on hole (days): 3.36, Seafloor depth in drilling depth below rig floor (DRF) (m): 3734.8, Seafloor depth est. method: Offset, Rig floor to sea level (m): 11.14, Drilled interval (m): 124, Drilled interval (no.): 1
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Sample code/labelSample labelDSDP/ODP/IODP sample designation
2Date/time endDate/time endCore on deck
3Section Top in meters below surfaceTopmbsfIODP Depth Scale TerminologyDSF
4Section Bot in meters below surfaceBotmbsfIODP Depth Scale TerminologyDSF
5DrilledDrilledmIODP Depth Scale TerminologyAdvanced
6Depth, sediment/rock, top/minimumDepth sed topmIODP Depth Scale TerminologyCSF
7Depth, sediment/rock, bottom/maximumDepth sed botmIODP Depth Scale TerminologyCSF-A
8Core lengthCore lengthmIODP Depth Scale TerminologyRecovered
9Number of sectionsN sections#
10Drilling rateDrilling ratem/hAccording to Coggon et al. 2024Real rate of penetration
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
10 data points

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