Rea, David K (1982): CaCO3, density, sedimentation and accumulation rates at DSDP Hole 68-503B [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.817075, Supplement to: Rea, DK (1982): Fluctuation in eolian sedimentation during the past five glacial-interglacial cycles: A preliminary examination of data from Deep Sea Drilling Project Hole 503B, Eastern Equatorial Pacific. In: Prell, WL; Gardner, JV; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 68, 409-415, https://doi.org/10.2973/dsdp.proc.68.115.1982
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Abstract:
Pelagic sediments from DSDP Hole 5O3B contain, in their carbonate abundance data, a clear record of glacial-interglacial cycles. The eolian component of those sediments was analyzed over the past four carbonate cycles, and the mass accumulation rate (MAR) and grain size of the eolian component was determined. Eolian MARs range from 24 to 169 mg/cm**2/10**3y. and commonly are higher by a factor of three to five during times of glacial retreat. Reduced contribution during periods of glaciation most likely reflects glacial-age humidity in the American source. Grain-size values (phi50) range from 8.25 to a minimum of 8.79phi-a variation in grain mass by a factor of 3.1. Larger grains reflect more vigorous atmospheric circulation, but sizes do not covary with the carbonate or eolian accumulation curves. These data suggest that the intensity of atmospheric circulation in the tropics may reflect the 42,000 y.-tilt cycle rather than the 100,000 y.-cycle of glacial advance.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 4.050300 * Longitude: -95.638700
Date/Time Start: 1979-09-06T00:00:00 * Date/Time End: 1979-09-06T00:00:00
Event(s):
68-503B * Latitude: 4.050300 * Longitude: -95.638700 * Date/Time: 1979-09-06T00:00:00 * Elevation: -3672.0 m * Penetration: 112.8 m * Recovery: 94.3 m * Location: North Pacific/FLANK * Campaign: Leg68 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 26 cores; 112.8 m cored; 0 m drilled; 83.6 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets
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Datasets listed in this publication series
- Rea, DK (1982): (Table 4) Weight percentage, accumulation rate, and size of eolian materials at DSDP Hole 68-503B. https://doi.org/10.1594/PANGAEA.817074
- Rea, DK (1982): (Table 1) CaCO3 at DSDP Cores 68-503B-1 and 68-503B-2. https://doi.org/10.1594/PANGAEA.817072
- Rea, DK (1982): (Table 3) Bulk density of sediments at DSDP Hole 68-503B. https://doi.org/10.1594/PANGAEA.817073