Farley, Kenneth A; Patterson, D B (1995): (Table 1) Helium concentration and flux in DSDP Hole 94-607 samples [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.769857, Supplement to: Farley, KA; Patterson, DB (1995): A 100-kyr periodicity in the flux of extraterrestrial 3He to the sea floor. Nature, 378(6557), 521-644, https://doi.org/10.1038/378600a0
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Published: 1995 (exact date unknown) • DOI registered: 2011-10-13
Abstract:
Most of the helium-3 in oceanic sediments conies from interplanetary dust particles (IDPs), and can therefore be used to infer the accretion rate of dust to the Earth through time (Ozima et al., 1984, doi:10.1038/311448a0; Takayanagi and Ozima, 1987, doi:10.1029/JB092iB12p12531; Farley, 1995, doi:10.1038/376153a0). 3He records from slowly accumulating pelagic clays indicate that the accretion rate varies considerably over millions of years, probably owing to cometary and asteroidal break-up events3. Muller and MacDonald have proposed (Muller and MacDonald, 1995, doi:10.1038/377107b0) that periodic changes in this accretion rate due to a previously unrecognized 100-kyr periodicity in the Earth's orbital inclination might account for the prominence of this frequency in climate records of the past million years (Imbrie et al., 1993, doi:10.1029/93PA02751). Here we report variations in the 3He flux to the sea floor that support this idea. We find that the flux recorded in rapidly accumulating Quaternary sediments from the Mid-Atlantic Ridge oscillates with a period of about 100 kyr. We cannot yet say, however, whether the 100-kyr climate cycle is a consequence of, a cause of, or an effect independent of these periodic changes in the rate of delivery of interplanetary dust to the sea floor.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 41.001200 * Longitude: -32.957300
Date/Time Start: 1983-07-06T00:00:00 * Date/Time End: 1983-07-06T00:00:00
Minimum Elevation: -3427.0 m * Maximum Elevation: -3427.0 m
Event(s):
94-607 * Latitude: 41.001200 * Longitude: -32.957300 * Date/Time: 1983-07-06T00:00:00 * Elevation: -3427.0 m * Penetration: 284.4 m * Recovery: 248.6 m * Location: North Atlantic/FLANK * Campaign: Leg94 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 30 cores; 284.4 m cored; 0 m drilled; 87.4 % recovery
Comment:
Core disruption between cores 94-607-2 and 94-607-3 precludes accurate determination of sedimentation rates in this interval; the mean value of the other 10 cycles has been adopted for this cycle.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | AGE | Age | ka BP | Geocode | ||
| 2 | Age, minimum/young | Age min | ka | Farley, Kenneth A | ||
| 3 | Age, maximum/old | Age max | ka | Farley, Kenneth A | ||
| 4 | Sample code/label | Sample label | Farley, Kenneth A | DSDP/ODP/IODP sample designation | ||
| 5 | Sample code/label 2 | Sample label 2 | Farley, Kenneth A | DSDP/ODP/IODP sample designation | ||
| 6 | Number of cycles | N cyc | Farley, Kenneth A | |||
| 7 | Sample amount | N | # | Farley, Kenneth A | ||
| 8 | Helium-3 | 3He | 10-10 cm3/g | Farley, Kenneth A | ||
| 9 | Helium-3, standard deviation | 3He std dev | ± | Farley, Kenneth A | ||
| 10 | Helium-3/Helium-4 ratio | 3He/4He | 10-4 | Farley, Kenneth A | ||
| 11 | Helium-3/Helium-4 ratio, standard deviation | 3He/4He std dev | ± | Farley, Kenneth A | ||
| 12 | Helium-3, extraterrestrial | 3He ET | % | Farley, Kenneth A | Calculated | |
| 13 | Helium-3, flux | 3He flux | 10-12 cm3/cm2/ka | Farley, Kenneth A | Calculated | |
| 14 | Helium-3, flux, standard deviation | 3He flux std dev | ± | Farley, Kenneth A | Calculated | |
| 15 | Accumulation rate, mass | MAR | g/cm2/ka | Farley, Kenneth A | Calculated |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
148 data points