Aluminium-26 in a manganese nodule

Details Aluminium-26 in a manganese nodule Aluminium-26 in a manganese nodule

Jul 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976natur.262..203r&link_type=abstract

Nature, vol. 262, July 15, 1976, p. 203, 204.

Computer Science

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Aluminum 26, Cosmic X Rays, Manganese, Nodules, Radioactive Isotopes, Ocean Bottom, Precipitates, Sediments

Scientific paper

The Al-26 content of the TECHNO-1 manganese nodule, obtained by a dredge at a depth of 4020 m to the north of the Tuamotu archipelago, was determined. The concentration of Al-26 in the first section (0-2.3 mm) was higher than that found in a Pacific sediment, confirming the postulated concentration of long lived cosmonuclides in manganese nodules for Al-26. Cosmogenic Al-26 apparently precipitates from seawater preferentially with oxides, hydroxides and/or authigenic aluminosilicates rather than with detrital silicate minerals. The upper limit of the observations for the 2.3-23 mm section is compatible with growth rates of 1-5 mm/million years.

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