Lippold, Jörg; Gruetzner, Jens; Winter, Diane M; Lahaye, Yann; Mangini, Augusto; Christl, Marcus (2009): Uranium, Thorium and Protactinium isotopes of ODP Site 172-1063. PANGAEA, https://doi.org/10.1594/PANGAEA.763199, Supplement to: Lippold, J et al. (2009): Does sedimentary 231Pa/230Th from the Bermuda Rise monitor past Atlantic Meridional Overtuning Circulation? Geophysical Research Letters, 36, L12601, https://doi.org/10.1029/2009GL038068
Always quote citation above when using data! You can download the citation in several formats below.
Ocean circulation may have undergone reductions and reinvigorations in the past closely tied to regional climate changes. Measurements of 231Pa/230Th ratios in a sediment core from the Bermuda Rise have been interpreted as evidence that the Atlantic Meridional Overturning Circulation (AMOC) was weakened or completely eliminated during a period of catastrophic iceberg discharges (Heinrich-Event 1, H1). Here we present new data from the Bermuda Rise that show further 231Pa/230Th peaks during Heinrich-2 (H2) and Heinrich-3 (H3). Additionally, a tight correlation between diatom abundances (biogenic silica) and 231Pa/230Th is discovered in this core. Our results redirect the interpretation of 231Pa/230Th from the Bermuda Rise as a proxy for ocean circulation towards a proxy that reacts highly sensitive to changes of particle composition and water mass properties.
Median Latitude: 33.686330 * Median Longitude: -57.615025 * South-bound Latitude: 33.686190 * West-bound Longitude: -57.615110 * North-bound Latitude: 33.686470 * East-bound Longitude: -57.614940
Date/Time Start: 1997-03-28T23:30:00 * Date/Time End: 1997-04-01T06:20:00
Minimum DEPTH, sediment/rock: 2.40 m * Maximum DEPTH, sediment/rock: 15.82 m
172-1063B * Latitude: 33.686470 * Longitude: -57.614940 * Date/Time Start: 1997-03-28T23:30:00 * Date/Time End: 1997-03-31T02:10:00 * Elevation: -4583.0 m * Penetration: 351.6 m * Recovery: 341.95 m * Location: Blake-Bahama Outer Ridge, North Atlantic Ocean * Campaign: Leg172 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 38 cores; 351.6 m cored; 0 m drilled; 97.3 % recovery
172-1063D * Latitude: 33.686190 * Longitude: -57.615110 * Date/Time: 1997-04-01T06:20:00 * Elevation: -4584.3 m * Penetration: 173.1 m * Recovery: 176.54 m * Location: North Atlantic Ocean * Campaign: Leg172 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 19 cores; 173.1 m cored; 0 m drilled; 102 % recovery
Sediment depth is given in mcd. AGE (ka) is an improvement of an astronomical tuned timescale [Grützner et al., 2002, doi:10.1016/S0025-3227(02)00320-1], now based on high resolution CaCO3 data derived from XRF core scanning. The carbonate record for ODP Site 1063 shows a high similarity to the CaCO3 content in the nearby piston core GPC 5 [Keigwin and Jones, 1994, doi:10.1029/94JC00525]. Correlation of CaCO3 was used to transfer the radiocarbon-based age model of GPC 5 to ODP Site 1063. The 21 radiocarbon dates reported by Keigwin and Jones  for the last 36 kyr have been converted to calendar ages as described by Fairbanks et al. [2005, doi:10.1016/j.quascirev.2005.04.007]. This data sets extends the study by McManus et al. 2004 (doi:10.1038/nature02494) from the nearby core GGC5 back to 35 ka, covering H2 and H3.
|#||Name||Short Name||Unit||Principal Investigator||Method/Device||Comment|
|2||Sample code/label||Sample label||Lippold, Jörg||DSDP/ODP/IODP sample designation|
|5||Protactinium-231/Thorium-230 excess, decay-corrected||231Pa/230Th xs,0||Lippold, Jörg||Calculated|
|6||Protactinium-231/Thorium-230 excess, decay-corrected, error, relative||231Pa/230Th ex,0 e rel||%||Lippold, Jörg||Calculated||2SE|
|7||Thorium-230||230Th||dpm/g||Lippold, Jörg||ICP-MS, Inductively coupled plasma - mass spectrometry|
|8||Thorium-230, error, relative||230Th e rel||%||Lippold, Jörg||ICP-MS, Inductively coupled plasma - mass spectrometry||2SE|
|9||Thorium-232||232Th||dpm/g||Lippold, Jörg||ICP-MS, Inductively coupled plasma - mass spectrometry|
|10||Thorium-232, error, relative||232Th e rel||%||Lippold, Jörg||ICP-MS, Inductively coupled plasma - mass spectrometry||2SE|
|11||Uranium-234||234U||dpm/g||Lippold, Jörg||ICP-MS, Inductively coupled plasma - mass spectrometry|
|12||Uranium-234, error, relative||234U e rel||%||Lippold, Jörg||ICP-MS, Inductively coupled plasma - mass spectrometry||2SE|
|13||Uranium-238||238U||dpm/g||Lippold, Jörg||ICP-MS, Inductively coupled plasma - mass spectrometry|
|14||Uranium-238, error, relative||238U e rel||%||Lippold, Jörg||ICP-MS, Inductively coupled plasma - mass spectrometry||2SE|
|15||Protactinium-231||231Pa||dpm/g||Lippold, Jörg||ICP-MS, Inductively coupled plasma - mass spectrometry|
|16||Protactinium-231, error, relative||231Pa e rel||%||Lippold, Jörg||ICP-MS, Inductively coupled plasma - mass spectrometry||2SE|
748 data points