(Table 1) Helium concentration and flux in DSDP Hole 94-607 samples

• Main Authors: Farley, Kenneth A, Patterson, D B
• Format: Dataset
• Language: English
• Published: PANGAEA 1995
• Subjects: 94-607; Accumulation rate; mass; AGE; maximum/old; minimum/young; Calculated; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Helium-3; extraterrestrial; flux; standard deviation; Helium-3/Helium-4; Leg94; North Atlantic/FLANK; Number of cycles; Sample amount; Sample code/label; Sample code/label 2; Farley; Mid-Atlantic Ridge; North Atlantic
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.769857; https://doi.org/10.1594/PANGAEA.769857

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.