Deep-sea spherules from Pacific clay - Mass distribution and influx rate

Details Deep-sea spherules from Pacific clay - Mass distribution and influx rate Deep-sea spherules from Pacific clay - Mass distribution and influx rate

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980gecoa..44.2067m&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 44, Dec. 1980, p. 2067-2069, 2071-2074.

Physics

11

Mass Distribution, Micrometeorites, Ocean Bottom, Pacific Ocean, Spherules, Stony Meteorites, Clays, Electron Microscopy, Interplanetary Dust, Microanalysis

Scientific paper

From 411 kg of Pacific clay, 22 mg of stony spherules and 50 mg of iron spherules larger than 150 microns were concentrated. The extraterrestrial origin of these particles was evaluated with the aid of optical and electron microscopy and atomic absorption elemental analysis. An expression for the integral number of stony particles from this sediment in the mass range 20-300 micrograms was derived. The world-wide influx rate of stony particles in the mass range which survive atmospheric heating and ocean sediment storage is calculated to be 90 tons/yr. The relative contributions of ablation debris vs fused interplanetary dust to the influx of stony spherules is discussed, but no conclusions could be made.

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