McDonald, D; Pedersen, Thomas F; Crusius, John (1999): Age control points and sedimentation rates of ODP Hole 145-887B (Table 1) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.706816, Supplement to: McDonald, D et al. (1999): Multiple late Quaternary episodes of exceptional diatom production in the Gulf of Alaska. Deep Sea Research Part II: Topical Studies in Oceanography, 46(11-12), 2993-3017, https://doi.org/10.1016/S0967-0645(99)00091-0
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
Hole 887B of the Ocean Drilling Program (ODP) comprises a 44 m (750 kyr) long continuous section recovered from the Patton-Murray Rise, an elevated plateau that is largely isolated from turbidite deposition. The Patton-Murray area is centered under the Alaska Gyre, a region characterized by the domal upwelling of nutrient-rich waters. Marked increases in productivity and rapid settling of biogenic matter are suggested throughout the section by the episodic accumulation of diatomaceous oozes up to ~1 m thick that are accompanied by barium enrichments. Significant delta13Corg maxima in the major diatomaceous bands suggest that mixedlayer [CO2(aq)] may have been drawn down significantly during some of the productivity events. The episodes of enhanced productivity at Site 887 occur synchronously with short-lived minima in planktonic foram delta18O, suggesting a direct link to low salinity, or less likely, warming, events in the Gulf of Alaska. There is no obvious explanation for the events, but they may be related to seasonal incursions of meltwater from Alaska. We speculate that episodic input of meltwater- or dust-borne iron from Asian or Alaskan sources may have promoted the extraordinary diatom production events recorded in the sedimentary record.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 54.365400 * Longitude: -148.446000
Date/Time Start: 1992-09-11T06:15:00 * Date/Time End: 1992-09-12T05:15:00
Minimum DEPTH, sediment/rock: 0.30 m * Maximum DEPTH, sediment/rock: 45.86 m
Event(s):
145-887B * Latitude: 54.365400 * Longitude: -148.446000 * Date/Time Start: 1992-09-11T06:15:00 * Date/Time End: 1992-09-12T05:15:00 * Elevation: -3648.0 m * Penetration: 40 m * Recovery: 41.38 m * Location: North Pacific Ocean * Campaign: Leg145 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 5 cores; 40 m cored; 0 m drilled; 103.4 % recovery
Comment:
Depth, sediment (m) is composite depth (mcd)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | Depth, composite | Depth comp | mcd | McDonald, D | Intercore correlation | composite depth-ash layer |
| 3 | Stage | Stage | McDonald, D | Age model, SPECMAP chronology, Imbrie et al. (1984) | isotopic event, below Stage 16 modification by Shackleton et al. (1990) | |
| 4 | Age, dated material | Dated material | McDonald, D | |||
| 5 | Age, dated | Age dated | ka | McDonald, D | Age, AMS 14C milieu/reservoir corrected | corrected by subtraction a reservoir age of 717 +/- 47 years (Southon et al., 1990) |
| 6 | Age, dated | Age dated | ka | McDonald, D | Calculated | from reservoir-corrected 14C dates using the algorithm of Bard et al. (1996) |
| 7 | Age, dated standard deviation | Age dated std dev | ± | McDonald, D | Calculated | reservoi-corrected 14C dates |
| 8 | Sedimentation rate | SR | cm/ka | McDonald, D | Calculated |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
155 data points
Data
| 1 Depth sed [m] | 2 Depth comp [mcd] (composite depth-ash layer, In...) | 3 Stage (isotopic event, below Stage 1...) | 4 Dated material | 5 Age dated [ka] (corrected by subtraction a re...) | 6 Age dated [ka] (from reservoir-corrected 14C ...) | 7 Age dated std dev [±] (reservoi-corrected 14C dates,...) | 8 SR [cm/ka] (Calculated) |
|---|---|---|---|---|---|---|---|
| 0.30 | 0.30 | N. pachyderma | 5.923 | 6.200 | 0.304 | 4.6 | |
| 0.60 | 0.60 | Mixed Planks. | 10.923 | 12.700 | 0.110 | 3.4 | |
| 0.63 | 0.63 | Mixed Planks. | 11.628 | 13.600 | 0.115 | 14.3 | |
| 0.75 | 0.75 | Mixed Planks. | 12.298 | 14.400 | 0.130 | 10.3 | |
| 1.24 | 1.24 | Mixed Planks. | 16.168 | 19.100 | 0.165 | 7.1 | |
| 1.38 | 1.35 | N. pachyderma | 17.463 | 20.700 | 0.170 | 5.3 | |
| 1.57 | 1.53 | N. pachyderma | 20.383 | 24.100 | 0.220 | 12.0 | |
| 1.90 | 1.78 | N. pachyderma | 22.203 | 26.200 | 0.230 | 6.2 | |
| 2.56 | 2.44 | N. pachyderma | 32.183 | 36.900 | 0.700 | 4.7 | |
| 2.67 | 2.55 | Mixed Planks. | 34.523 | 39.200 | 0.920 | 7.2 | |
| 4.15 | 3.98 | 4 | 59.000 | 5.7 | |||
| 4.83 | 4.66 | 5 | 71.000 | 11.0 | |||
| 6.17 | 5.98 | 5.2-5.1 | 83.000 | 7.1 | |||
| 6.95 | 6.76 | 5.3-5.2 | 94.000 | 7.7 | |||
| 7.72 | 7.53 | 5.4-5.3 | 104.000 | 15.1 | |||
| 9.38 | 9.19 | 5.5-5.4 | 115.000 | 5.0 | |||
| 10.38 | 9.84 | 6 | 128.000 | 6.4 | |||
| 12.06 | 11.31 | 6.4 | 151.000 | 6.1 | |||
| 14.05 | 13.26 | 6.6 | 183.000 | 5.5 | |||
| 17.49 | 16.65 | 8 | 245.000 | 5.2 | |||
| 18.11 | 17.27 | 8.3 | 257.000 | 6.5 | |||
| 20.91 | 20.01 | 8.6 | 299.000 | 4.9 | |||
| 21.98 | 21.08 | 9.3 | 331.000 | 8.0 | |||
| 23.40 | 22.49 | 10 | 350.000 | 8.2 | |||
| 27.99 | 27.01 | 11.3 | 405.000 | 1.7 | |||
| 28.30 | 27.32 | 12 | 423.000 | 4.5 | |||
| 32.41 | 31.34 | 13.2 | 513.000 | 5.0 | |||
| 33.71 | 32.58 | 14.2 | 538.000 | 5.1 | |||
| 35.10 | 33.97 | 15 | 565.000 | 4.5 | |||
| 37.64 | 36.47 | 16 | 620.000 | 5.2 | |||
| 38.89 | 37.72 | 16.3-16.2 | 644.000 | 4.5 | |||
| 41.97 | 40.68 | 17.3 | 710.000 | 5.5 | |||
| 43.17 | 41.88 | 18.3 | 732.000 | 5.5 | |||
| 45.86 | 44.52 | B/M | 780.000 |