Bloomstine, Maurice K; Rea, David K (1986): (Table 1) Age, porocity, density, mass accumulation rates and grain size of the eolian component of sediments from DSDP Leg 92 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.789710, Supplement to: Bloomstine, MK; Rea, DK (1986): Post-middle Oligocene Eolian deposition from the trade winds of the Southeast Pacific. In: Leinen, M; Rea DK; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 92, 331-340, https://doi.org/10.2973/dsdp.proc.92.114.1986
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Abstract:
Eolian dust preserved in deep-sea sediments provides a record of atmospheric circulation throughout geologic time. This eolian component has been isolated to determine its mass accumulation rate (MAR) and grain size in post-middle Oligocene sediments from DSDP Sites 597 to 602, which lie along 19°S on the East Pacific Rise. The rate of eolian deposition has been very low (about 2 to 3 mg/(cm**2 x 10**3 yr) and reasonably consistent at all the sites, except that the MAR of the eolian component at Site 597 increases to an average of about 8 mg/(cm**2 x 10**3 yr) between 17 and 19 Ma. Eolian grain size at Site 598 changes dramatically at 10.5 Ma from 7.2 phi in younger sediments to 8.2 phi in older material and may provide evidence of an intensification of zonal winds that took place in response to Antarctic ice formation just prior to that time. Pliocene to Pleistocene samples from Leg 92 show no evidence of the severalfold increase in dust accumulation and grain size recorded at Northern Hemisphere locations at the time corresponding to the onset of Northern Hemisphere glaciation. The low and constant flux of eolian material indicates that South America was consistently vegetated from post-middle Oligocene time to the present.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: -19.033911 * Median Longitude: -119.842367 * South-bound Latitude: -19.451500 * West-bound Longitude: -129.770500 * North-bound Latitude: -18.806300 * East-bound Longitude: -116.839500
Date/Time Start: 1983-03-02T00:00:00 * Date/Time End: 1983-03-26T00:00:00
Minimum DEPTH, sediment/rock: 0.13 m * Maximum DEPTH, sediment/rock: 50.98 m
Event(s):
92-597 * Latitude: -18.806300 * Longitude: -129.770500 * Date/Time: 1983-03-02T00:00:00 * Elevation: -4166.0 m * Penetration: 54.7 m * Recovery: 41.8 m * Location: South Pacific * Campaign: Leg92 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 7 cores; 45.1 m cored; 9.6 m drilled; 92.7 % recovery
92-598 * Latitude: -19.004700 * Longitude: -124.676800 * Date/Time: 1983-03-17T00:00:00 * Elevation: -3699.0 m * Penetration: 52.4 m * Recovery: 41.2 m * Location: South Pacific * Campaign: Leg92 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 8 cores; 52.4 m cored; 0 m drilled; 78.7 % recovery
92-599 * Latitude: -19.451500 * Longitude: -119.881300 * Date/Time: 1983-03-20T00:00:00 * Elevation: -3654.0 m * Penetration: 46.3 m * Recovery: 34.8 m * Location: South Pacific/PLATEAU * Campaign: Leg92 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 5 cores; 46.3 m cored; 0 m drilled; 75.1 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Elevation of event | Elevation | m | |||
| 5 | Sample code/label | Sample label | Bloomstine, Maurice K | DSDP/ODP/IODP sample designation | ||
| 6 | DEPTH, sediment/rock | Depth sed | m | Geocode – mbsf | ||
| 7 | AGE | Age | ka BP | Geocode | ||
| 8 | Porosity | Poros | % vol | Bloomstine, Maurice K | ||
| 9 | Density, dry bulk | DBD | g/cm3 | Bloomstine, Maurice K | ||
| 10 | Sedimentation rate | SR | cm/ka | Bloomstine, Maurice K | see reference(s) | Linear |
| 11 | Accumulation rate, mass | MAR | g/cm2/ka | Bloomstine, Maurice K | see reference(s) | |
| 12 | Dust, aeolian | Dust | % | Bloomstine, Maurice K | Coulter Counter (Beckman Coulter) | |
| 13 | Accumulation rate, dust | DMAR | g/cm2/ka | Bloomstine, Maurice K | see reference(s) | Aeolian |
| 14 | Median, grain size | D50 | phi | Bloomstine, Maurice K | Calculated after FOLK | # - Samples for which two data sets had to be averaged to determine eolian grain size |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
1384 data points