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Barnet, James S K; Littler, Kate; Kroon, Dick; Leng, Melanie J; Westerhold, Thomas; Röhl, Ursula; Zachos, James C (2017): Late Maastrichtian-early Paleocene benthic stable carbon and oxygen isotope records from ODP Site 208-1262, South Atlantic. PANGAEA,, Supplement to: Barnet, JSK et al. (2017): A new high-resolution chronology for the late Maastrichtian warming event: Establishing robust temporal links with the onset of Deccan volcanism. Geology, 46(2), 147-150,

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The late Maastrichtian warming event was defined by a global temperature increase of about 2.5-5°C, which occurred ~150-300 kyr before the K/Pg (Cretaceous/Paleogene) mass extinction. This transient warming event has traditionally been associated with a major pulse of Deccan Trap volcanism, however large uncertainties on radiogenic dating methods have long hampered a definitive correlation. Here we present a high-resolution, single-species benthic stable isotope record from the South Atlantic, calibrated to a new high resolution orbitally-tuned age model, to provide a revised chronology of the event, which we then correlate to the latest radiogenic dates of the main Deccan Trap eruption phases. The onset of deep-sea warming is synchronous with a 405-kyr eccentricity minimum, excluding a control by orbital forcing alone, although amplified carbon cycle sensitivity to orbital precession is evident during the greenhouse warming. Our data reveals that the initiation of deep-sea warming coincides, within uncertainty, with the onset of the main phase of Deccan volcanism, strongly suggesting a causal link.
Latitude: -27.185833 * Longitude: 1.577000
Date/Time Start: 2003-03-24T00:00:00 * Date/Time End: 2003-03-29T00:00:00
Minimum DEPTH, sediment/rock: 193.31 m * Maximum DEPTH, sediment/rock: 212.66 m
208-1262 * Latitude: -27.185833 * Longitude: 1.577000 * Date/Time Start: 2003-03-24T00:00:00 * Date/Time End: 2003-03-29T00:00:00 * Elevation: -4755.4 m * Penetration: 583.9 m * Recovery: 502.5 m * Location: Walvis Ridge, Southeast Atlantic Ocean * Campaign: Leg208 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 54 cores; 493.9 m cored; 90 m drilled; 101.7 % recovery
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Sample code/labelSample labelBarnet, James S KDSDP/ODP/IODP sample designation
2DEPTH, sediment/rockDepthmBarnet, James S KGeocode – mbsf
3Foraminifera, benthic δ13CForam bent δ13C‰ PDBBarnet, James S Kvs. VPDB
4Foraminifera, benthic δ18OForam bent δ18O‰ PDBBarnet, James S Kvs. VPDB
5DEPTH, sediment/rockDepthmBarnet, James S KGeocode – midpoint mbsf
6Depth, compositeDepth compmcdBarnet, James S Kmidpoint
7AGEAgeka BPBarnet, James S KGeocode – this study
8δ18O, adjusted/correctedδ18OBarnet, James S Kcorrected to Cibicidoides
9Bottom water temperatureBWT°CBarnet, James S KNuttallides
10Bottom water temperatureBWT°CBarnet, James S KCibicides
4122 data points

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