Core alignment and composite depth scale of DSDP Site 86-577

Autoria(s): Dickens, Gerald Roy; Backman, Jan
Cobertura

MEDIAN LATITUDE: 32.441873 * MEDIAN LONGITUDE: 157.723260 * SOUTH-BOUND LATITUDE: 32.441300 * WEST-BOUND LONGITUDE: 157.723200 * NORTH-BOUND LATITUDE: 32.442200 * EAST-BOUND LONGITUDE: 157.723300 * DATE/TIME START: 1982-05-23T00:00:00 * DATE/TIME END: 1982-05-23T00:00:00
Data(s)

21/03/2013
Resumo

Deep Sea Drilling Project Site 577 on Shatsky Rise (North Pacific Ocean) recovered a series of cores at three holes that contain calcareous nannofossil ooze of latest Cretaceous (late Maastrichtian) through early Eocene age. Several important records have been generated using samples from these cores, but the stratigraphy has remained outdated and confusing. Here we revise the stratigraphy at Site 577. This includes refining several age datums, realigning cores in the depth domain, and placing all stratigraphic markers on a current time scale. The work provides a template for appropriately bringing latest Cretaceous and Paleogene data sets at old drill sites into current paleoceanographic literature for this time interval. While the Paleocene Eocene Thermal Maximum (PETM) lies within core gaps at Holes 577* and 577A, the sedimentary record at the site holds other important events and remains crucially relevant to understanding changes in oceanographic conditions from the latest Cretaceous through early Paleogene.
Formato

application/zip, 14 datasets
Identificador

https://doi.pangaea.de/10.1594/PANGAEA.809257

doi:10.1594/PANGAEA.809257
Idioma(s)

en
Publicador

PANGAEA
Direitos

CC-BY: Creative Commons Attribution 3.0 Unported

Access constraints: unrestricted
Fonte

Supplement to: Dickens, Gerald Roy; Backman, Jan (2013): Core alignment and composite depth scale for the lower Paleogene through uppermost Cretaceous interval at Deep Sea Drilling Project Site 577. Newsletters on Stratigraphy, 46(1), 47-68, doi:10.1127/0078-0421/2013/0027
Palavras-Chave #<1 = R; <1 = R (rare, 0-1 specimen per field of view, >1 = F (few, 1-2 specimens f/v); >63 µm; adjusted; adjusted, the depth of the sample in floating depth space [mcd] relative to m below seafloor; after adding core offsets (Table 2); Age, relative; age as above, but assuming no core gaps and overlaps; Age model; Age model, optional; Age model opt; Age on Option 1 time scale suggested by Westerhold et al. (2008); WO-1 = Westerhold et al. (2008) Option 1. Note these authors do not report ages above the top of Chron C24n.3n or below the top of Chron C30n; ages for polarity chron boundaries beyond are assumed to be the same as reported by Cande and Kent (1995).; Ageprof dat des; Ageprofile Datum Description; Age rel; Aragonia spp., d13C; Aragonia spp., d18O; Aragonia spp. d13C; Aragonia spp. d18O; blue horizons are approximate positions of polarity chron reversals; Blue horizons are approximate positions of polarity chron reversals; green horizons are positions of known hyperthermal events. Note that ages given for hyperthermals differ from those estimated, which may reflect inaccurate ages for the hyperthermals or differential sedimentation between chosen polarity chrons.; bottom; CaCO3; Calcium carbonate; Comment; core-catcher (CC) samples have been assigned section 8 for math; given in brackets; Core gap; core offsets from Table 2; core top [m]; core top [mbsf]; core top [mbsf], reported according to drillers table (Shipboard Scientific Party, 1985) and with positions of CC intervals from core logs; core top [mbsf], reported according to drillers table (Shipboard Scientific Party, 1985) intervals from core logs; core top depth [mbsf]; corrected [mbsf], assuming average interval distance and the above; corrected depths [mbsf] after moving tops of core sections back to 0 cm; counts [#/mm**2]; D. bramlettei; D. diastypus; D. falcatus; D. lodoensis; D. mohleri; D. multiradiatus; D. nobilis; D. okadai; D. sublodoensis; d13C carb; d18O carb; Deep Sea Drilling Project; delta 13C, carbonate; delta 18O, carbonate; Density, wet bulk; Depth; Depth, composite; Depth, composite top; DEPTH, sediment/rock; Depth, sediment revised; Depth, top/min; Depth comp; Depth c top; Depth revised; Depth top; Discoaster bramlettei; Discoaster diastypus; Discoaster falcatus; Discoaster lodoensis; Discoaster mohleri; Discoaster multiradiatus; Discoaster nobilis; Discoaster okadai; Discoaster sublodoensis; DSDP; E. macellus; E. robusta; Ellipsolithus macellus; Ellipsolithus robusta; estimated age on Option 1 time by Westerhold et al. (2008) as determined by linear sedimentaton between six polarity chron reversals and data on a mcd depth scale; estimated age relative to start of PETM using information in this paper; Event; F. pileatus; Fasciculithus pileatus; Fasciculithus spp.; fix [mbsf], assuming average interval distance and the above; Gamma-ray attenuation porosity evaluator (GRAPE); Gap; GRAPE data reported as density (g/cm**3), although it is a proxy measurement for density; H. kleinpellii; Heliolithus kleinpellii; Label 2; M = polarity chron, N = nannofossil, E = event; N. truempyi d13C; N. truempyi d18O; Nannofossils, downhole contamination; Nannos cont; new depth; Nuttallides truempyi, d13C; Nuttallides truempyi, d18O; ODP sample designation; Offset; offset from Table 2; offset of cores from Table 2; polarity chron boundaries; problematic GRAPE data, typically caused by void space in core sections; R = rare (0-1 specimen per field of view), F = few (1-2 specimens f/v), C = common (5-10 specimens f/v), A = abundant (>10 specimens f/v), - = not present; Reference; Reference/source; reported age; reported age relative to start of PETM reported by Cramer et al. (2003); reported by Agnini et al. (2007) and Westerhold et al. (2008), W-O1 = Westerhold Option 1; S. radians; Sample code/label; Sample code/label 2; Size fraction > 0.063 mm, sand; Sphenolithus radians; Sphenolithus spp.; T. contortus; T. orthostylus; this is not internally consistent across papers; for example, the GPTS 2004 ages differ subtly between Agnini et al. (2007) and Westerhold et al. (2008); top; Tribrachiatus contortus; Tribrachiatus orthostylus; Void corr; Void correction; WBD; we have relabled core catcher (CC) samples as an additional section for purposes of math; given in brackets
Tipo

Dataset
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