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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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 | 3He/4He | 10-4 | Farley, Kenneth A | ||
| 11 | Helium-3/Helium-4, 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
Data
| 1 Age [ka BP] | 2 Age min [ka] | 3 Age max [ka] | 4 Sample label | 5 Sample label 2 | 6 N cyc | 7 N [#] | 8 3He [10-10 cm3/g] | 9 3He std dev [±] | 10 3He/4He [10-4] | 11 3He/4He std dev [±] | 12 3He ET [%] | 13 3He flux [10-12 cm3/cm2/ka] | 14 3He flux std dev [±] | 15 MAR [g/cm2/ka] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 260.5 | 253 | 268 | 94-607-2-1,0-91 | 0 | 1 | 0.00424 | 0.00010 | 0.00091 | 0.00005 | 78 | 1.34 | 0.05 | 4.05 | |
| 280.0 | 268 | 292 | 94-607-2-1,88-150 | 94-607-2-2,0-8 | 1 | 4 | 0.00208 | 0.00014 | 0.00173 | 0.00013 | 87 | 0.49 | 0.04 | 2.76 |
| 303.0 | 292 | 314 | 94-607-2-2,8-106 | 2 | 7 | 0.00306 | 0.00028 | 0.00161 | 0.00015 | 87 | 1.08 | 0.11 | 4.06 | |
| 325.0 | 314 | 336 | 94-607-2-2,106-150 | 94-607-2-3,0-53 | 3 | 4 | 0.00443 | 0.00009 | 0.00204 | 0.00004 | 89 | 1.74 | 0.04 | 4.31 |
| 345.0 | 336 | 354 | 94-607-2-3,53-150 | 4 | 4 | 0.00440 | 0.00014 | 0.00127 | 0.00005 | 85 | 1.57 | 0.07 | 4.70 | |
| 363.5 | 354 | 373 | 94-607-2-4,0-78 | 5 | 4 | 0.00346 | 0.00014 | 0.00157 | 0.00006 | 86 | 1.18 | 0.05 | 3.62 | |
| 381.0 | 373 | 389 | 94-607-2-4,78-121 | 6 | 5 | 0.00211 | 0.00023 | 0.00195 | 0.00018 | 89 | 0.51 | 0.06 | 2.72 | |
| 399.0 | 389 | 409 | 94-6072-4,121-150 | 94-607-2-5,0-69 | 7 | 4 | 0.00223 | 0.00018 | 0.00281 | 0.00018 | 92 | 1.02 | 0.08 | 4.85 |
| 418.5 | 409 | 428 | 94-607-2-5,69-150 | 94-607-2-6,0-8 | 8 | 8 | 0.00268 | 0.00022 | 0.00089 | 0.00001 | 75 | 0.94 | 0.10 | 4.66 |
| 436.5 | 428 | 445 | 94-607-2-6,8-91 | 9 | 4 | 0.00374 | 0.00010 | 0.00124 | 0.00005 | 82 | 1.02 | 0.03 | 3.31 | |
| 451.5 | 445 | 458 | 94-607-2-6,91-150 | 94-607-2-7,0-26 | 10 | 6 | 0.00273 | 0.00023 | 0.00104 | 0.00007 | 80 | 0.88 | 0.09 | 4.01 |